--- /dev/null
+* Clock Block on Freescale CoreNet Platforms
+
+Freescale CoreNet chips take primary clocking input from the external
+SYSCLK signal. The SYSCLK input (frequency) is multiplied using
+multiple phase locked loops (PLL) to create a variety of frequencies
+which can then be passed to a variety of internal logic, including
+cores and peripheral IP blocks.
+Please refer to the Reference Manual for details.
+
+1. Clock Block Binding
+
+Required properties:
+- compatible: Should contain a specific clock block compatible string
+ and a single chassis clock compatible string.
+ Clock block strings include, but not limited to, one of the:
+ * "fsl,p2041-clockgen"
+ * "fsl,p3041-clockgen"
+ * "fsl,p4080-clockgen"
+ * "fsl,p5020-clockgen"
+ * "fsl,p5040-clockgen"
+ * "fsl,t4240-clockgen"
+ * "fsl,b4420-clockgen"
+ * "fsl,b4860-clockgen"
+ Chassis clock strings include:
+ * "fsl,qoriq-clockgen-1.0": for chassis 1.0 clocks
+ * "fsl,qoriq-clockgen-2.0": for chassis 2.0 clocks
+- reg: Describes the address of the device's resources within the
+ address space defined by its parent bus, and resource zero
+ represents the clock register set
+- clock-frequency: Input system clock frequency
+
+Recommended properties:
+- ranges: Allows valid translation between child's address space and
+ parent's. Must be present if the device has sub-nodes.
+- #address-cells: Specifies the number of cells used to represent
+ physical base addresses. Must be present if the device has
+ sub-nodes and set to 1 if present
+- #size-cells: Specifies the number of cells used to represent
+ the size of an address. Must be present if the device has
+ sub-nodes and set to 1 if present
+
+2. Clock Provider/Consumer Binding
+
+Most of the bindings are from the common clock binding[1].
+ [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : Should include one of the following:
+ * "fsl,qoriq-core-pll-1.0" for core PLL clocks (v1.0)
+ * "fsl,qoriq-core-pll-2.0" for core PLL clocks (v2.0)
+ * "fsl,qoriq-core-mux-1.0" for core mux clocks (v1.0)
+ * "fsl,qoriq-core-mux-2.0" for core mux clocks (v2.0)
+ * "fsl,qoriq-sysclk-1.0": for input system clock (v1.0).
+ It takes parent's clock-frequency as its clock.
+ * "fsl,qoriq-sysclk-2.0": for input system clock (v2.0).
+ It takes parent's clock-frequency as its clock.
+- #clock-cells: From common clock binding. The number of cells in a
+ clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0"
+ clocks, or <1> for "fsl,qoriq-core-pll-[1,2].0" clocks.
+ For "fsl,qoriq-core-pll-[1,2].0" clocks, the single
+ clock-specifier cell may take the following values:
+ * 0 - equal to the PLL frequency
+ * 1 - equal to the PLL frequency divided by 2
+ * 2 - equal to the PLL frequency divided by 4
+
+Recommended properties:
+- clocks: Should be the phandle of input parent clock
+- clock-names: From common clock binding, indicates the clock name
+- clock-output-names: From common clock binding, indicates the names of
+ output clocks
+- reg: Should be the offset and length of clock block base address.
+ The length should be 4.
+
+Example for clock block and clock provider:
+/ {
+ clockgen: global-utilities@e1000 {
+ compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
+ ranges = <0x0 0xe1000 0x1000>;
+ clock-frequency = <133333333>;
+ reg = <0xe1000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sysclk: sysclk {
+ #clock-cells = <0>;
+ compatible = "fsl,qoriq-sysclk-1.0";
+ clock-output-names = "sysclk";
+ }
+
+ pll0: pll0@800 {
+ #clock-cells = <1>;
+ reg = <0x800 0x4>;
+ compatible = "fsl,qoriq-core-pll-1.0";
+ clocks = <&sysclk>;
+ clock-output-names = "pll0", "pll0-div2";
+ };
+
+ pll1: pll1@820 {
+ #clock-cells = <1>;
+ reg = <0x820 0x4>;
+ compatible = "fsl,qoriq-core-pll-1.0";
+ clocks = <&sysclk>;
+ clock-output-names = "pll1", "pll1-div2";
+ };
+
+ mux0: mux0@0 {
+ #clock-cells = <0>;
+ reg = <0x0 0x4>;
+ compatible = "fsl,qoriq-core-mux-1.0";
+ clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
+ clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
+ clock-output-names = "cmux0";
+ };
+
+ mux1: mux1@20 {
+ #clock-cells = <0>;
+ reg = <0x20 0x4>;
+ compatible = "fsl,qoriq-core-mux-1.0";
+ clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
+ clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
+ clock-output-names = "cmux1";
+ };
+ };
+ }
+
+Example for clock consumer:
+
+/ {
+ cpu0: PowerPC,e5500@0 {
+ ...
+ clocks = <&mux0>;
+ ...
+ };
+ }
config PPC_64K_PAGES
bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
+ depends on !PPC_FSL_BOOK3E
select PPC_HAS_HASH_64K if PPC_STD_MMU_64
config PPC_256K_PAGES
source "crypto/Kconfig"
-config PPC_CLOCK
- bool
- default n
- select HAVE_CLK
-
config PPC_LIB_RHEAP
bool
};
};
+ clocks {
+ osc {
+ clock-frequency = <25000000>;
+ };
+ };
+
soc@80000000 {
+ bus-frequency = <80000000>; /* 80 MHz ips bus */
clock@f00 {
compatible = "fsl,mpc5121rev2-clock", "fsl,mpc5121-clock";
* option) any later version.
*/
+#include <dt-bindings/clock/mpc512x-clock.h>
+
/dts-v1/;
/ {
compatible = "fsl,mpc5121-mbx";
reg = <0x20000000 0x4000>;
interrupts = <66 0x8>;
+ clocks = <&clks MPC512x_CLK_MBX_BUS>,
+ <&clks MPC512x_CLK_MBX_3D>,
+ <&clks MPC512x_CLK_MBX>;
+ clock-names = "mbx-bus", "mbx-3d", "mbx";
};
sram@30000000 {
interrupts = <6 8>;
#address-cells = <1>;
#size-cells = <1>;
+ clocks = <&clks MPC512x_CLK_NFC>;
+ clock-names = "ipg";
};
localbus@80000020 {
ranges = <0x0 0x0 0xfc000000 0x04000000>;
};
+ clocks {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ osc: osc {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <33000000>;
+ };
+ };
+
soc@80000000 {
compatible = "fsl,mpc5121-immr";
#address-cells = <1>;
};
/* Clock control */
- clock@f00 {
+ clks: clock@f00 {
compatible = "fsl,mpc5121-clock";
reg = <0xf00 0x100>;
+ #clock-cells = <1>;
+ clocks = <&osc>;
+ clock-names = "osc";
};
/* Power Management Controller */
compatible = "fsl,mpc5121-mscan";
reg = <0x1300 0x80>;
interrupts = <12 0x8>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN0_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@1380 {
compatible = "fsl,mpc5121-mscan";
reg = <0x1380 0x80>;
interrupts = <13 0x8>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN1_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
sdhc@1500 {
interrupts = <8 0x8>;
dmas = <&dma0 30>;
dma-names = "rx-tx";
+ clocks = <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SDHC>;
+ clock-names = "ipg", "per";
};
i2c@1700 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1700 0x20>;
interrupts = <9 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2c@1720 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1720 0x20>;
interrupts = <10 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2c@1740 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1740 0x20>;
interrupts = <11 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2ccontrol@1760 {
compatible = "fsl,mpc5121-axe";
reg = <0x2000 0x100>;
interrupts = <42 0x8>;
+ clocks = <&clks MPC512x_CLK_AXE>;
+ clock-names = "ipg";
};
display@2100 {
compatible = "fsl,mpc5121-diu";
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
+ clocks = <&clks MPC512x_CLK_DIU>;
+ clock-names = "ipg";
};
can@2300 {
compatible = "fsl,mpc5121-mscan";
reg = <0x2300 0x80>;
interrupts = <90 0x8>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN2_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@2380 {
compatible = "fsl,mpc5121-mscan";
reg = <0x2380 0x80>;
interrupts = <91 0x8>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN3_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
viu@2400 {
compatible = "fsl,mpc5121-viu";
reg = <0x2400 0x400>;
interrupts = <67 0x8>;
+ clocks = <&clks MPC512x_CLK_VIU>;
+ clock-names = "ipg";
};
mdio@2800 {
reg = <0x2800 0x800>;
#address-cells = <1>;
#size-cells = <0>;
+ clocks = <&clks MPC512x_CLK_FEC>;
+ clock-names = "per";
};
eth0: ethernet@2800 {
reg = <0x2800 0x800>;
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <4 0x8>;
+ clocks = <&clks MPC512x_CLK_FEC>;
+ clock-names = "per";
};
/* USB1 using external ULPI PHY */
interrupts = <43 0x8>;
dr_mode = "otg";
phy_type = "ulpi";
+ clocks = <&clks MPC512x_CLK_USB1>;
+ clock-names = "ipg";
};
/* USB0 using internal UTMI PHY */
interrupts = <44 0x8>;
dr_mode = "otg";
phy_type = "utmi_wide";
+ clocks = <&clks MPC512x_CLK_USB2>;
+ clock-names = "ipg";
};
/* IO control */
compatible = "fsl,mpc5121-pata";
reg = <0x10200 0x100>;
interrupts = <5 0x8>;
+ clocks = <&clks MPC512x_CLK_PATA>;
+ clock-names = "ipg";
};
/* 512x PSCs are not 52xx PSC compatible */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC0>,
+ <&clks MPC512x_CLK_PSC0_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC1 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC1>,
+ <&clks MPC512x_CLK_PSC1_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC2 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC2>,
+ <&clks MPC512x_CLK_PSC2_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC3 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC3>,
+ <&clks MPC512x_CLK_PSC3_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC4 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC4>,
+ <&clks MPC512x_CLK_PSC4_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC5 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC5>,
+ <&clks MPC512x_CLK_PSC5_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC6 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC6>,
+ <&clks MPC512x_CLK_PSC6_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC7 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC7>,
+ <&clks MPC512x_CLK_PSC7_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC8 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC8>,
+ <&clks MPC512x_CLK_PSC8_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC9 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC9>,
+ <&clks MPC512x_CLK_PSC9_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC10 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC10>,
+ <&clks MPC512x_CLK_PSC10_MCLK>;
+ clock-names = "ipg", "mclk";
};
/* PSC11 */
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC11>,
+ <&clks MPC512x_CLK_PSC11_MCLK>;
+ clock-names = "ipg", "mclk";
};
pscfifo@11f00 {
compatible = "fsl,mpc5121-psc-fifo";
reg = <0x11f00 0x100>;
interrupts = <40 0x8>;
+ clocks = <&clks MPC512x_CLK_PSC_FIFO>;
+ clock-names = "ipg";
};
dma0: dma@14000 {
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
+ clocks = <&clks MPC512x_CLK_PCI>;
+ clock-names = "ipg";
reg = <0x80008500 0x100 /* internal registers */
0x80008300 0x8>; /* config space access registers */
* option) any later version.
*/
+#include <dt-bindings/clock/mpc512x-clock.h>
+
/dts-v1/;
/ {
reg = <0x30000000 0x08000>; // 32K at 0x30000000
};
+ clocks {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ osc: osc {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <33000000>;
+ };
+ };
+
soc@80000000 {
compatible = "fsl,mpc5121-immr";
#address-cells = <1>;
reg = <0xe00 0x100>;
};
- clock@f00 { // Clock control
+ clks: clock@f00 { // Clock control
compatible = "fsl,mpc5121-clock";
reg = <0xf00 0x100>;
+ #clock-cells = <1>;
+ clocks = <&osc>;
+ clock-names = "osc";
};
pmc@1000{ // Power Management Controller
compatible = "fsl,mpc5121-mscan";
interrupts = <12 0x8>;
reg = <0x1300 0x80>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN0_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@1380 {
compatible = "fsl,mpc5121-mscan";
interrupts = <13 0x8>;
reg = <0x1380 0x80>;
+ clocks = <&clks MPC512x_CLK_BDLC>,
+ <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SYS>,
+ <&clks MPC512x_CLK_REF>,
+ <&clks MPC512x_CLK_MSCAN1_MCLK>;
+ clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
sdhc@1500 {
compatible = "fsl,mpc5121-sdhc";
interrupts = <8 0x8>;
reg = <0x1500 0x100>;
+ clocks = <&clks MPC512x_CLK_IPS>,
+ <&clks MPC512x_CLK_SDHC>;
+ clock-names = "ipg", "per";
};
i2c@1700 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1700 0x20>;
interrupts = <0x9 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2c@1720 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1720 0x20>;
interrupts = <0xa 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2c@1740 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1740 0x20>;
interrupts = <0xb 0x8>;
+ clocks = <&clks MPC512x_CLK_I2C>;
+ clock-names = "ipg";
};
i2ccontrol@1760 {
compatible = "fsl,mpc5121-diu";
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
+ clocks = <&clks MPC512x_CLK_DIU>;
+ clock-names = "ipg";
};
mdio@2800 {
interrupts = <4 0x8>;
phy-handle = < &phy0 >;
phy-connection-type = "rmii";
+ clocks = <&clks MPC512x_CLK_FEC>;
+ clock-names = "per";
};
// IO control
interrupts = <43 0x8>;
dr_mode = "host";
phy_type = "ulpi";
+ clocks = <&clks MPC512x_CLK_USB1>;
+ clock-names = "ipg";
status = "disabled";
};
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC1>,
+ <&clks MPC512x_CLK_PSC1_MCLK>;
+ clock-names = "ipg", "mclk";
};
// PSC9 uart1 aka ttyPSC1
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
+ clocks = <&clks MPC512x_CLK_PSC9>,
+ <&clks MPC512x_CLK_PSC9_MCLK>;
+ clock-names = "ipg", "mclk";
};
pscfifo@11f00 {
compatible = "fsl,mpc5121-psc-fifo";
reg = <0x11f00 0x100>;
interrupts = <40 0x8>;
+ clocks = <&clks MPC512x_CLK_PSC_FIFO>;
+ clock-names = "ipg";
};
dma@14000 {
+++ /dev/null
-#ifndef __ASM_POWERPC_CLK_INTERFACE_H
-#define __ASM_POWERPC_CLK_INTERFACE_H
-
-#include <linux/clk.h>
-
-struct clk_interface {
- struct clk* (*clk_get) (struct device *dev, const char *id);
- int (*clk_enable) (struct clk *clk);
- void (*clk_disable) (struct clk *clk);
- unsigned long (*clk_get_rate) (struct clk *clk);
- void (*clk_put) (struct clk *clk);
- long (*clk_round_rate) (struct clk *clk, unsigned long rate);
- int (*clk_set_rate) (struct clk *clk, unsigned long rate);
- int (*clk_set_parent) (struct clk *clk, struct clk *parent);
- struct clk* (*clk_get_parent) (struct clk *clk);
-};
-
-extern struct clk_interface clk_functions;
-
-#endif /* __ASM_POWERPC_CLK_INTERFACE_H */
u32 cccr; /* CFM Clock Control Register */
u32 dccr; /* DIU Clock Control Register */
u32 mscan_ccr[4]; /* MSCAN Clock Control Registers */
- u8 res[0x98]; /* Reserved */
+ u32 out_ccr[4]; /* OUT CLK Configure Registers */
+ u32 rsv0[2]; /* Reserved */
+ u32 scfr3; /* System Clock Frequency Register 3 */
+ u32 rsv1[3]; /* Reserved */
+ u32 spll_lock_cnt; /* System PLL Lock Counter */
+ u8 res[0x6c]; /* Reserved */
};
/*
pmd_t *pmdp);
#define pmd_move_must_withdraw pmd_move_must_withdraw
-typedef struct spinlock spinlock_t;
-static inline int pmd_move_must_withdraw(spinlock_t *new_pmd_ptl,
- spinlock_t *old_pmd_ptl)
+struct spinlock;
+static inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
+ struct spinlock *old_pmd_ptl)
{
/*
* Archs like ppc64 use pgtable to store per pmd
extern int powersave_nap; /* set if nap mode can be used in idle loop */
extern void power7_nap(void);
-
-#ifdef CONFIG_PSERIES_IDLE
-extern void update_smt_snooze_delay(int cpu, int residency);
-#else
-static inline void update_smt_snooze_delay(int cpu, int residency) {}
-#endif
-
extern void flush_instruction_cache(void);
extern void hard_reset_now(void);
extern void poweroff_now(void);
COMPAT_SYS(process_vm_writev)
SYSCALL(finit_module)
SYSCALL(ni_syscall) /* sys_kcmp */
+SYSCALL_SPU(sched_setattr)
+SYSCALL_SPU(sched_getattr)
#include <uapi/asm/unistd.h>
-#define __NR_syscalls 355
+#define __NR_syscalls 357
#define __NR__exit __NR_exit
#define NR_syscalls __NR_syscalls
#define __NR_process_vm_writev 352
#define __NR_finit_module 353
#define __NR_kcmp 354
-
+#define __NR_sched_setattr 355
+#define __NR_sched_getattr 356
#endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
obj-$(CONFIG_PPC_P7_NAP) += idle_power7.o
obj-$(CONFIG_PPC_OF) += of_platform.o prom_parse.o
-obj-$(CONFIG_PPC_CLOCK) += clock.o
procfs-y := proc_powerpc.o
obj-$(CONFIG_PROC_FS) += $(procfs-y)
rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
{
remove_index_dirs(cache_dir);
+ /* Remove cache dir from sysfs */
+ kobject_del(cache_dir->kobj);
+
kobject_put(cache_dir->kobj);
kfree(cache_dir);
+++ /dev/null
-/*
- * Dummy clk implementations for powerpc.
- * These need to be overridden in platform code.
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/export.h>
-#include <asm/clk_interface.h>
-
-struct clk_interface clk_functions;
-
-struct clk *clk_get(struct device *dev, const char *id)
-{
- if (clk_functions.clk_get)
- return clk_functions.clk_get(dev, id);
- return ERR_PTR(-ENOSYS);
-}
-EXPORT_SYMBOL(clk_get);
-
-void clk_put(struct clk *clk)
-{
- if (clk_functions.clk_put)
- clk_functions.clk_put(clk);
-}
-EXPORT_SYMBOL(clk_put);
-
-int clk_enable(struct clk *clk)
-{
- if (clk_functions.clk_enable)
- return clk_functions.clk_enable(clk);
- return -ENOSYS;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
- if (clk_functions.clk_disable)
- clk_functions.clk_disable(clk);
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
- if (clk_functions.clk_get_rate)
- return clk_functions.clk_get_rate(clk);
- return 0;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
- if (clk_functions.clk_round_rate)
- return clk_functions.clk_round_rate(clk, rate);
- return -ENOSYS;
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
- if (clk_functions.clk_set_rate)
- return clk_functions.clk_set_rate(clk, rate);
- return -ENOSYS;
-}
-EXPORT_SYMBOL(clk_set_rate);
-
-struct clk *clk_get_parent(struct clk *clk)
-{
- if (clk_functions.clk_get_parent)
- return clk_functions.clk_get_parent(clk);
- return ERR_PTR(-ENOSYS);
-}
-EXPORT_SYMBOL(clk_get_parent);
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
- if (clk_functions.clk_set_parent)
- return clk_functions.clk_set_parent(clk, parent);
- return -ENOSYS;
-}
-EXPORT_SYMBOL(clk_set_parent);
* schedule DABR
*/
#ifndef CONFIG_HAVE_HW_BREAKPOINT
- if (unlikely(hw_brk_match(&__get_cpu_var(current_brk), &new->thread.hw_brk)))
+ if (unlikely(!hw_brk_match(&__get_cpu_var(current_brk), &new->thread.hw_brk)))
set_breakpoint(&new->thread.hw_brk);
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
tm_frame = &rt_sf->uc_transact.uc_mcontext;
if (MSR_TM_ACTIVE(regs->msr)) {
+ if (__put_user((unsigned long)&rt_sf->uc_transact,
+ &rt_sf->uc.uc_link) ||
+ __put_user((unsigned long)tm_frame,
+ &rt_sf->uc_transact.uc_regs))
+ goto badframe;
if (save_tm_user_regs(regs, frame, tm_frame, sigret))
goto badframe;
}
else
#endif
{
+ if (__put_user(0, &rt_sf->uc.uc_link))
+ goto badframe;
if (save_user_regs(regs, frame, tm_frame, sigret, 1))
goto badframe;
}
regs->link = tramp;
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- if (MSR_TM_ACTIVE(regs->msr)) {
- if (__put_user((unsigned long)&rt_sf->uc_transact,
- &rt_sf->uc.uc_link)
- || __put_user((unsigned long)tm_frame, &rt_sf->uc_transact.uc_regs))
- goto badframe;
- }
- else
-#endif
- if (__put_user(0, &rt_sf->uc.uc_link))
- goto badframe;
-
current->thread.fp_state.fpscr = 0; /* turn off all fp exceptions */
/* create a stack frame for the caller of the handler */
return -EINVAL;
per_cpu(smt_snooze_delay, cpu->dev.id) = snooze;
- update_smt_snooze_delay(cpu->dev.id, snooze);
-
return count;
}
{
struct hugepd_freelist **batchp;
- batchp = &__get_cpu_var(hugepd_freelist_cur);
+ batchp = &get_cpu_var(hugepd_freelist_cur);
if (atomic_read(&tlb->mm->mm_users) < 2 ||
cpumask_equal(mm_cpumask(tlb->mm),
cpumask_of(smp_processor_id()))) {
kmem_cache_free(hugepte_cache, hugepte);
+ put_cpu_var(hugepd_freelist_cur);
return;
}
call_rcu_sched(&(*batchp)->rcu, hugepd_free_rcu_callback);
*batchp = NULL;
}
+ put_cpu_var(hugepd_freelist_cur);
}
#endif
static int topology_update_init(void)
{
start_topology_update();
- proc_create("powerpc/topology_updates", 644, NULL, &topology_ops);
+ proc_create("powerpc/topology_updates", 0644, NULL, &topology_ops);
return 0;
}
if (fixed && (addr & ((1ul << pshift) - 1)))
return -EINVAL;
if (fixed && addr > (mm->task_size - len))
- return -EINVAL;
+ return -ENOMEM;
/* If hint, make sure it matches our alignment restrictions */
if (!fixed && addr) {
beq tlb_miss_common_bolted
b itlb_miss_kernel_bolted
+#ifdef CONFIG_PPC_FSL_BOOK3E
/*
* TLB miss handling for e6500 and derivatives, using hardware tablewalk.
*
TLB_MISS_STATS_I(MMSTAT_TLB_MISS_NORM_FAULT)
tlb_epilog_bolted
b exc_instruction_storage_book3e
-
+#endif /* CONFIG_PPC_FSL_BOOK3E */
/**********************************************************************
* *
patch_exception(0x1c0, exc_data_tlb_miss_htw_book3e);
patch_exception(0x1e0, exc_instruction_tlb_miss_htw_book3e);
break;
+#ifdef CONFIG_PPC_FSL_BOOK3E
case PPC_HTW_E6500:
patch_exception(0x1c0, exc_data_tlb_miss_e6500_book3e);
patch_exception(0x1e0, exc_instruction_tlb_miss_e6500_book3e);
break;
+#endif
}
pr_info("MMU: Book3E HW tablewalk %s\n",
book3e_htw_mode != PPC_HTW_NONE ? "enabled" : "not supported");
config PPC_MPC512x
bool "512x-based boards"
depends on 6xx
+ select COMMON_CLK
select FSL_SOC
select IPIC
- select PPC_CLOCK
select PPC_PCI_CHOICE
select FSL_PCI if PCI
select ARCH_WANT_OPTIONAL_GPIOLIB
#
# Makefile for the Freescale PowerPC 512x linux kernel.
#
-obj-y += clock.o mpc512x_shared.o
+obj-$(CONFIG_COMMON_CLK) += clock-commonclk.o
+obj-y += mpc512x_shared.o
obj-$(CONFIG_MPC5121_ADS) += mpc5121_ads.o mpc5121_ads_cpld.o
obj-$(CONFIG_MPC512x_GENERIC) += mpc512x_generic.o
obj-$(CONFIG_PDM360NG) += pdm360ng.o
--- /dev/null
+/*
+ * Copyright (C) 2013 DENX Software Engineering
+ *
+ * Gerhard Sittig, <gsi@denx.de>
+ *
+ * common clock driver support for the MPC512x platform
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/mpc5121.h>
+#include <dt-bindings/clock/mpc512x-clock.h>
+
+#include "mpc512x.h" /* our public mpc5121_clk_init() API */
+
+/* helpers to keep the MCLK intermediates "somewhere" in our table */
+enum {
+ MCLK_IDX_MUX0,
+ MCLK_IDX_EN0,
+ MCLK_IDX_DIV0,
+ MCLK_MAX_IDX,
+};
+
+#define NR_PSCS 12
+#define NR_MSCANS 4
+#define NR_SPDIFS 1
+#define NR_OUTCLK 4
+#define NR_MCLKS (NR_PSCS + NR_MSCANS + NR_SPDIFS + NR_OUTCLK)
+
+/* extend the public set of clocks by adding internal slots for management */
+enum {
+ /* arrange for adjacent numbers after the public set */
+ MPC512x_CLK_START_PRIVATE = MPC512x_CLK_LAST_PUBLIC,
+ /* clocks which aren't announced to the public */
+ MPC512x_CLK_DDR,
+ MPC512x_CLK_MEM,
+ MPC512x_CLK_IIM,
+ /* intermediates in div+gate combos or fractional dividers */
+ MPC512x_CLK_DDR_UG,
+ MPC512x_CLK_SDHC_x4,
+ MPC512x_CLK_SDHC_UG,
+ MPC512x_CLK_SDHC2_UG,
+ MPC512x_CLK_DIU_x4,
+ MPC512x_CLK_DIU_UG,
+ MPC512x_CLK_MBX_BUS_UG,
+ MPC512x_CLK_MBX_UG,
+ MPC512x_CLK_MBX_3D_UG,
+ MPC512x_CLK_PCI_UG,
+ MPC512x_CLK_NFC_UG,
+ MPC512x_CLK_LPC_UG,
+ MPC512x_CLK_SPDIF_TX_IN,
+ /* intermediates for the mux+gate+div+mux MCLK generation */
+ MPC512x_CLK_MCLKS_FIRST,
+ MPC512x_CLK_MCLKS_LAST = MPC512x_CLK_MCLKS_FIRST
+ + NR_MCLKS * MCLK_MAX_IDX,
+ /* internal, symbolic spec for the number of slots */
+ MPC512x_CLK_LAST_PRIVATE,
+};
+
+/* data required for the OF clock provider registration */
+static struct clk *clks[MPC512x_CLK_LAST_PRIVATE];
+static struct clk_onecell_data clk_data;
+
+/* CCM register access */
+static struct mpc512x_ccm __iomem *clkregs;
+static DEFINE_SPINLOCK(clklock);
+
+/* SoC variants {{{ */
+
+/*
+ * tell SoC variants apart as they are rather similar yet not identical,
+ * cache the result in an enum to not repeatedly run the expensive OF test
+ *
+ * MPC5123 is an MPC5121 without the MBX graphics accelerator
+ *
+ * MPC5125 has many more differences: no MBX, no AXE, no VIU, no SPDIF,
+ * no PATA, no SATA, no PCI, two FECs (of different compatibility name),
+ * only 10 PSCs (of different compatibility name), two SDHCs, different
+ * NFC IP block, output clocks, system PLL status query, different CPMF
+ * interpretation, no CFM, different fourth PSC/CAN mux0 input -- yet
+ * those differences can get folded into this clock provider support
+ * code and don't warrant a separate highly redundant implementation
+ */
+
+static enum soc_type {
+ MPC512x_SOC_MPC5121,
+ MPC512x_SOC_MPC5123,
+ MPC512x_SOC_MPC5125,
+} soc;
+
+static void mpc512x_clk_determine_soc(void)
+{
+ if (of_machine_is_compatible("fsl,mpc5121")) {
+ soc = MPC512x_SOC_MPC5121;
+ return;
+ }
+ if (of_machine_is_compatible("fsl,mpc5123")) {
+ soc = MPC512x_SOC_MPC5123;
+ return;
+ }
+ if (of_machine_is_compatible("fsl,mpc5125")) {
+ soc = MPC512x_SOC_MPC5125;
+ return;
+ }
+}
+
+static bool soc_has_mbx(void)
+{
+ if (soc == MPC512x_SOC_MPC5121)
+ return true;
+ return false;
+}
+
+static bool soc_has_axe(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_viu(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_spdif(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_pata(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_sata(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_pci(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return false;
+ return true;
+}
+
+static bool soc_has_fec2(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+static int soc_max_pscnum(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return 10;
+ return 12;
+}
+
+static bool soc_has_sdhc2(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+static bool soc_has_nfc_5125(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+static bool soc_has_outclk(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+static bool soc_has_cpmf_0_bypass(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+static bool soc_has_mclk_mux0_canin(void)
+{
+ if (soc == MPC512x_SOC_MPC5125)
+ return true;
+ return false;
+}
+
+/* }}} SoC variants */
+/* common clk API wrappers {{{ */
+
+/* convenience wrappers around the common clk API */
+static inline struct clk *mpc512x_clk_fixed(const char *name, int rate)
+{
+ return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
+}
+
+static inline struct clk *mpc512x_clk_factor(
+ const char *name, const char *parent_name,
+ int mul, int div)
+{
+ int clkflags;
+
+ clkflags = CLK_SET_RATE_PARENT;
+ return clk_register_fixed_factor(NULL, name, parent_name, clkflags,
+ mul, div);
+}
+
+static inline struct clk *mpc512x_clk_divider(
+ const char *name, const char *parent_name, u8 clkflags,
+ u32 __iomem *reg, u8 pos, u8 len, int divflags)
+{
+ return clk_register_divider(NULL, name, parent_name, clkflags,
+ reg, pos, len, divflags, &clklock);
+}
+
+static inline struct clk *mpc512x_clk_divtable(
+ const char *name, const char *parent_name,
+ u32 __iomem *reg, u8 pos, u8 len,
+ const struct clk_div_table *divtab)
+{
+ u8 divflags;
+
+ divflags = 0;
+ return clk_register_divider_table(NULL, name, parent_name, 0,
+ reg, pos, len, divflags,
+ divtab, &clklock);
+}
+
+static inline struct clk *mpc512x_clk_gated(
+ const char *name, const char *parent_name,
+ u32 __iomem *reg, u8 pos)
+{
+ int clkflags;
+
+ clkflags = CLK_SET_RATE_PARENT;
+ return clk_register_gate(NULL, name, parent_name, clkflags,
+ reg, pos, 0, &clklock);
+}
+
+static inline struct clk *mpc512x_clk_muxed(const char *name,
+ const char **parent_names, int parent_count,
+ u32 __iomem *reg, u8 pos, u8 len)
+{
+ int clkflags;
+ u8 muxflags;
+
+ clkflags = CLK_SET_RATE_PARENT;
+ muxflags = 0;
+ return clk_register_mux(NULL, name,
+ parent_names, parent_count, clkflags,
+ reg, pos, len, muxflags, &clklock);
+}
+
+/* }}} common clk API wrappers */
+
+/* helper to isolate a bit field from a register */
+static inline int get_bit_field(uint32_t __iomem *reg, uint8_t pos, uint8_t len)
+{
+ uint32_t val;
+
+ val = in_be32(reg);
+ val >>= pos;
+ val &= (1 << len) - 1;
+ return val;
+}
+
+/* get the SPMF and translate it into the "sys pll" multiplier */
+static int get_spmf_mult(void)
+{
+ static int spmf_to_mult[] = {
+ 68, 1, 12, 16, 20, 24, 28, 32,
+ 36, 40, 44, 48, 52, 56, 60, 64,
+ };
+ int spmf;
+
+ spmf = get_bit_field(&clkregs->spmr, 24, 4);
+ return spmf_to_mult[spmf];
+}
+
+/*
+ * get the SYS_DIV value and translate it into a divide factor
+ *
+ * values returned from here are a multiple of the real factor since the
+ * divide ratio is fractional
+ */
+static int get_sys_div_x2(void)
+{
+ static int sysdiv_code_to_x2[] = {
+ 4, 5, 6, 7, 8, 9, 10, 14,
+ 12, 16, 18, 22, 20, 24, 26, 30,
+ 28, 32, 34, 38, 36, 40, 42, 46,
+ 44, 48, 50, 54, 52, 56, 58, 62,
+ 60, 64, 66,
+ };
+ int divcode;
+
+ divcode = get_bit_field(&clkregs->scfr2, 26, 6);
+ return sysdiv_code_to_x2[divcode];
+}
+
+/*
+ * get the CPMF value and translate it into a multiplier factor
+ *
+ * values returned from here are a multiple of the real factor since the
+ * multiplier ratio is fractional
+ */
+static int get_cpmf_mult_x2(void)
+{
+ static int cpmf_to_mult_x36[] = {
+ /* 0b000 is "times 36" */
+ 72, 2, 2, 3, 4, 5, 6, 7,
+ };
+ static int cpmf_to_mult_0by[] = {
+ /* 0b000 is "bypass" */
+ 2, 2, 2, 3, 4, 5, 6, 7,
+ };
+
+ int *cpmf_to_mult;
+ int cpmf;
+
+ cpmf = get_bit_field(&clkregs->spmr, 16, 4);
+ if (soc_has_cpmf_0_bypass())
+ cpmf_to_mult = cpmf_to_mult_0by;
+ else
+ cpmf_to_mult = cpmf_to_mult_x36;
+ return cpmf_to_mult[cpmf];
+}
+
+/*
+ * some of the clock dividers do scale in a linear way, yet not all of
+ * their bit combinations are legal; use a divider table to get a
+ * resulting set of applicable divider values
+ */
+
+/* applies to the IPS_DIV, and PCI_DIV values */
+static struct clk_div_table divtab_2346[] = {
+ { .val = 2, .div = 2, },
+ { .val = 3, .div = 3, },
+ { .val = 4, .div = 4, },
+ { .val = 6, .div = 6, },
+ { .div = 0, },
+};
+
+/* applies to the MBX_DIV, LPC_DIV, and NFC_DIV values */
+static struct clk_div_table divtab_1234[] = {
+ { .val = 1, .div = 1, },
+ { .val = 2, .div = 2, },
+ { .val = 3, .div = 3, },
+ { .val = 4, .div = 4, },
+ { .div = 0, },
+};
+
+static int get_freq_from_dt(char *propname)
+{
+ struct device_node *np;
+ const unsigned int *prop;
+ int val;
+
+ val = 0;
+ np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-immr");
+ if (np) {
+ prop = of_get_property(np, propname, NULL);
+ if (prop)
+ val = *prop;
+ of_node_put(np);
+ }
+ return val;
+}
+
+static void mpc512x_clk_preset_data(void)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(clks); i++)
+ clks[i] = ERR_PTR(-ENODEV);
+}
+
+/*
+ * - receives the "bus frequency" from the caller (that's the IPS clock
+ * rate, the historical source of clock information)
+ * - fetches the system PLL multiplier and divider values as well as the
+ * IPS divider value from hardware
+ * - determines the REF clock rate either from the XTAL/OSC spec (if
+ * there is a device tree node describing the oscillator) or from the
+ * IPS bus clock (supported for backwards compatibility, such that
+ * setups without XTAL/OSC specs keep working)
+ * - creates the "ref" clock item in the clock tree, such that
+ * subsequent code can create the remainder of the hierarchy (REF ->
+ * SYS -> CSB -> IPS) from the REF clock rate and the returned mul/div
+ * values
+ */
+static void mpc512x_clk_setup_ref_clock(struct device_node *np, int bus_freq,
+ int *sys_mul, int *sys_div,
+ int *ips_div)
+{
+ struct clk *osc_clk;
+ int calc_freq;
+
+ /* fetch mul/div factors from the hardware */
+ *sys_mul = get_spmf_mult();
+ *sys_mul *= 2; /* compensate for the fractional divider */
+ *sys_div = get_sys_div_x2();
+ *ips_div = get_bit_field(&clkregs->scfr1, 23, 3);
+
+ /* lookup the oscillator clock for its rate */
+ osc_clk = of_clk_get_by_name(np, "osc");
+
+ /*
+ * either descend from OSC to REF (and in bypassing verify the
+ * IPS rate), or backtrack from IPS and multiplier values that
+ * were fetched from hardware to REF and thus to the OSC value
+ *
+ * in either case the REF clock gets created here and the
+ * remainder of the clock tree can get spanned from there
+ */
+ if (!IS_ERR(osc_clk)) {
+ clks[MPC512x_CLK_REF] = mpc512x_clk_factor("ref", "osc", 1, 1);
+ calc_freq = clk_get_rate(clks[MPC512x_CLK_REF]);
+ calc_freq *= *sys_mul;
+ calc_freq /= *sys_div;
+ calc_freq /= 2;
+ calc_freq /= *ips_div;
+ if (bus_freq && calc_freq != bus_freq)
+ pr_warn("calc rate %d != OF spec %d\n",
+ calc_freq, bus_freq);
+ } else {
+ calc_freq = bus_freq; /* start with IPS */
+ calc_freq *= *ips_div; /* IPS -> CSB */
+ calc_freq *= 2; /* CSB -> SYS */
+ calc_freq *= *sys_div; /* SYS -> PLL out */
+ calc_freq /= *sys_mul; /* PLL out -> REF == OSC */
+ clks[MPC512x_CLK_REF] = mpc512x_clk_fixed("ref", calc_freq);
+ }
+}
+
+/* MCLK helpers {{{ */
+
+/*
+ * helper code for the MCLK subtree setup
+ *
+ * the overview in section 5.2.4 of the MPC5121e Reference Manual rev4
+ * suggests that all instances of the "PSC clock generation" are equal,
+ * and that one might re-use the PSC setup for MSCAN clock generation
+ * (section 5.2.5) as well, at least the logic if not the data for
+ * description
+ *
+ * the details (starting at page 5-20) show differences in the specific
+ * inputs of the first mux stage ("can clk in", "spdif tx"), and the
+ * factual non-availability of the second mux stage (it's present yet
+ * only one input is valid)
+ *
+ * the MSCAN clock related registers (starting at page 5-35) all
+ * reference "spdif clk" at the first mux stage and don't mention any
+ * "can clk" at all, which somehow is unexpected
+ *
+ * TODO re-check the document, and clarify whether the RM is correct in
+ * the overview or in the details, and whether the difference is a
+ * clipboard induced error or results from chip revisions
+ *
+ * it turns out that the RM rev4 as of 2012-06 talks about "can" for the
+ * PSCs while RM rev3 as of 2008-10 talks about "spdif", so I guess that
+ * first a doc update is required which better reflects reality in the
+ * SoC before the implementation should follow while no questions remain
+ */
+
+/*
+ * note that this declaration raises a checkpatch warning, but
+ * it's the very data type dictated by <linux/clk-provider.h>,
+ * "fixing" this warning will break compilation
+ */
+static const char *parent_names_mux0_spdif[] = {
+ "sys", "ref", "psc-mclk-in", "spdif-tx",
+};
+
+static const char *parent_names_mux0_canin[] = {
+ "sys", "ref", "psc-mclk-in", "can-clk-in",
+};
+
+enum mclk_type {
+ MCLK_TYPE_PSC,
+ MCLK_TYPE_MSCAN,
+ MCLK_TYPE_SPDIF,
+ MCLK_TYPE_OUTCLK,
+};
+
+struct mclk_setup_data {
+ enum mclk_type type;
+ bool has_mclk1;
+ const char *name_mux0;
+ const char *name_en0;
+ const char *name_div0;
+ const char *parent_names_mux1[2];
+ const char *name_mclk;
+};
+
+#define MCLK_SETUP_DATA_PSC(id) { \
+ MCLK_TYPE_PSC, 0, \
+ "psc" #id "-mux0", \
+ "psc" #id "-en0", \
+ "psc" #id "_mclk_div", \
+ { "psc" #id "_mclk_div", "dummy", }, \
+ "psc" #id "_mclk", \
+}
+
+#define MCLK_SETUP_DATA_MSCAN(id) { \
+ MCLK_TYPE_MSCAN, 0, \
+ "mscan" #id "-mux0", \
+ "mscan" #id "-en0", \
+ "mscan" #id "_mclk_div", \
+ { "mscan" #id "_mclk_div", "dummy", }, \
+ "mscan" #id "_mclk", \
+}
+
+#define MCLK_SETUP_DATA_SPDIF { \
+ MCLK_TYPE_SPDIF, 1, \
+ "spdif-mux0", \
+ "spdif-en0", \
+ "spdif_mclk_div", \
+ { "spdif_mclk_div", "spdif-rx", }, \
+ "spdif_mclk", \
+}
+
+#define MCLK_SETUP_DATA_OUTCLK(id) { \
+ MCLK_TYPE_OUTCLK, 0, \
+ "out" #id "-mux0", \
+ "out" #id "-en0", \
+ "out" #id "_mclk_div", \
+ { "out" #id "_mclk_div", "dummy", }, \
+ "out" #id "_clk", \
+}
+
+static struct mclk_setup_data mclk_psc_data[] = {
+ MCLK_SETUP_DATA_PSC(0),
+ MCLK_SETUP_DATA_PSC(1),
+ MCLK_SETUP_DATA_PSC(2),
+ MCLK_SETUP_DATA_PSC(3),
+ MCLK_SETUP_DATA_PSC(4),
+ MCLK_SETUP_DATA_PSC(5),
+ MCLK_SETUP_DATA_PSC(6),
+ MCLK_SETUP_DATA_PSC(7),
+ MCLK_SETUP_DATA_PSC(8),
+ MCLK_SETUP_DATA_PSC(9),
+ MCLK_SETUP_DATA_PSC(10),
+ MCLK_SETUP_DATA_PSC(11),
+};
+
+static struct mclk_setup_data mclk_mscan_data[] = {
+ MCLK_SETUP_DATA_MSCAN(0),
+ MCLK_SETUP_DATA_MSCAN(1),
+ MCLK_SETUP_DATA_MSCAN(2),
+ MCLK_SETUP_DATA_MSCAN(3),
+};
+
+static struct mclk_setup_data mclk_spdif_data[] = {
+ MCLK_SETUP_DATA_SPDIF,
+};
+
+static struct mclk_setup_data mclk_outclk_data[] = {
+ MCLK_SETUP_DATA_OUTCLK(0),
+ MCLK_SETUP_DATA_OUTCLK(1),
+ MCLK_SETUP_DATA_OUTCLK(2),
+ MCLK_SETUP_DATA_OUTCLK(3),
+};
+
+/* setup the MCLK clock subtree of an individual PSC/MSCAN/SPDIF */
+static void mpc512x_clk_setup_mclk(struct mclk_setup_data *entry, size_t idx)
+{
+ size_t clks_idx_pub, clks_idx_int;
+ u32 __iomem *mccr_reg; /* MCLK control register (mux, en, div) */
+ int div;
+
+ /* derive a few parameters from the component type and index */
+ switch (entry->type) {
+ case MCLK_TYPE_PSC:
+ clks_idx_pub = MPC512x_CLK_PSC0_MCLK + idx;
+ clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ + (idx) * MCLK_MAX_IDX;
+ mccr_reg = &clkregs->psc_ccr[idx];
+ break;
+ case MCLK_TYPE_MSCAN:
+ clks_idx_pub = MPC512x_CLK_MSCAN0_MCLK + idx;
+ clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ + (NR_PSCS + idx) * MCLK_MAX_IDX;
+ mccr_reg = &clkregs->mscan_ccr[idx];
+ break;
+ case MCLK_TYPE_SPDIF:
+ clks_idx_pub = MPC512x_CLK_SPDIF_MCLK;
+ clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ + (NR_PSCS + NR_MSCANS) * MCLK_MAX_IDX;
+ mccr_reg = &clkregs->spccr;
+ break;
+ case MCLK_TYPE_OUTCLK:
+ clks_idx_pub = MPC512x_CLK_OUT0_CLK + idx;
+ clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ + (NR_PSCS + NR_MSCANS + NR_SPDIFS + idx)
+ * MCLK_MAX_IDX;
+ mccr_reg = &clkregs->out_ccr[idx];
+ break;
+ default:
+ return;
+ }
+
+ /*
+ * this was grabbed from the PPC_CLOCK implementation, which
+ * enforced a specific MCLK divider while the clock was gated
+ * during setup (that's a documented hardware requirement)
+ *
+ * the PPC_CLOCK implementation might even have violated the
+ * "MCLK <= IPS" constraint, the fixed divider value of 1
+ * results in a divider of 2 and thus MCLK = SYS/2 which equals
+ * CSB which is greater than IPS; the serial port setup may have
+ * adjusted the divider which the clock setup might have left in
+ * an undesirable state
+ *
+ * initial setup is:
+ * - MCLK 0 from SYS
+ * - MCLK DIV such to not exceed the IPS clock
+ * - MCLK 0 enabled
+ * - MCLK 1 from MCLK DIV
+ */
+ div = clk_get_rate(clks[MPC512x_CLK_SYS]);
+ div /= clk_get_rate(clks[MPC512x_CLK_IPS]);
+ out_be32(mccr_reg, (0 << 16));
+ out_be32(mccr_reg, (0 << 16) | ((div - 1) << 17));
+ out_be32(mccr_reg, (1 << 16) | ((div - 1) << 17));
+
+ /*
+ * create the 'struct clk' items of the MCLK's clock subtree
+ *
+ * note that by design we always create all nodes and won't take
+ * shortcuts here, because
+ * - the "internal" MCLK_DIV and MCLK_OUT signal in turn are
+ * selectable inputs to the CFM while those who "actually use"
+ * the PSC/MSCAN/SPDIF (serial drivers et al) need the MCLK
+ * for their bitrate
+ * - in the absence of "aliases" for clocks we need to create
+ * individial 'struct clk' items for whatever might get
+ * referenced or looked up, even if several of those items are
+ * identical from the logical POV (their rate value)
+ * - for easier future maintenance and for better reflection of
+ * the SoC's documentation, it appears appropriate to generate
+ * clock items even for those muxers which actually are NOPs
+ * (those with two inputs of which one is reserved)
+ */
+ clks[clks_idx_int + MCLK_IDX_MUX0] = mpc512x_clk_muxed(
+ entry->name_mux0,
+ soc_has_mclk_mux0_canin()
+ ? &parent_names_mux0_canin[0]
+ : &parent_names_mux0_spdif[0],
+ ARRAY_SIZE(parent_names_mux0_spdif),
+ mccr_reg, 14, 2);
+ clks[clks_idx_int + MCLK_IDX_EN0] = mpc512x_clk_gated(
+ entry->name_en0, entry->name_mux0,
+ mccr_reg, 16);
+ clks[clks_idx_int + MCLK_IDX_DIV0] = mpc512x_clk_divider(
+ entry->name_div0,
+ entry->name_en0, CLK_SET_RATE_GATE,
+ mccr_reg, 17, 15, 0);
+ if (entry->has_mclk1) {
+ clks[clks_idx_pub] = mpc512x_clk_muxed(
+ entry->name_mclk,
+ &entry->parent_names_mux1[0],
+ ARRAY_SIZE(entry->parent_names_mux1),
+ mccr_reg, 7, 1);
+ } else {
+ clks[clks_idx_pub] = mpc512x_clk_factor(
+ entry->name_mclk,
+ entry->parent_names_mux1[0],
+ 1, 1);
+ }
+}
+
+/* }}} MCLK helpers */
+
+static void mpc512x_clk_setup_clock_tree(struct device_node *np, int busfreq)
+{
+ int sys_mul, sys_div, ips_div;
+ int mul, div;
+ size_t mclk_idx;
+ int freq;
+
+ /*
+ * developer's notes:
+ * - consider whether to handle clocks which have both gates and
+ * dividers via intermediates or by means of composites
+ * - fractional dividers appear to not map well to composites
+ * since they can be seen as a fixed multiplier and an
+ * adjustable divider, while composites can only combine at
+ * most one of a mux, div, and gate each into one 'struct clk'
+ * item
+ * - PSC/MSCAN/SPDIF clock generation OTOH already is very
+ * specific and cannot get mapped to componsites (at least not
+ * a single one, maybe two of them, but then some of these
+ * intermediate clock signals get referenced elsewhere (e.g.
+ * in the clock frequency measurement, CFM) and thus need
+ * publicly available names
+ * - the current source layout appropriately reflects the
+ * hardware setup, and it works, so it's questionable whether
+ * further changes will result in big enough a benefit
+ */
+
+ /* regardless of whether XTAL/OSC exists, have REF created */
+ mpc512x_clk_setup_ref_clock(np, busfreq, &sys_mul, &sys_div, &ips_div);
+
+ /* now setup the REF -> SYS -> CSB -> IPS hierarchy */
+ clks[MPC512x_CLK_SYS] = mpc512x_clk_factor("sys", "ref",
+ sys_mul, sys_div);
+ clks[MPC512x_CLK_CSB] = mpc512x_clk_factor("csb", "sys", 1, 2);
+ clks[MPC512x_CLK_IPS] = mpc512x_clk_divtable("ips", "csb",
+ &clkregs->scfr1, 23, 3,
+ divtab_2346);
+ /* now setup anything below SYS and CSB and IPS */
+
+ clks[MPC512x_CLK_DDR_UG] = mpc512x_clk_factor("ddr-ug", "sys", 1, 2);
+
+ /*
+ * the Reference Manual discusses that for SDHC only even divide
+ * ratios are supported because clock domain synchronization
+ * between 'per' and 'ipg' is broken;
+ * keep the divider's bit 0 cleared (per reset value), and only
+ * allow to setup the divider's bits 7:1, which results in that
+ * only even divide ratios can get configured upon rate changes;
+ * keep the "x4" name because this bit shift hack is an internal
+ * implementation detail, the "fractional divider with quarters"
+ * semantics remains
+ */
+ clks[MPC512x_CLK_SDHC_x4] = mpc512x_clk_factor("sdhc-x4", "csb", 2, 1);
+ clks[MPC512x_CLK_SDHC_UG] = mpc512x_clk_divider("sdhc-ug", "sdhc-x4", 0,
+ &clkregs->scfr2, 1, 7,
+ CLK_DIVIDER_ONE_BASED);
+ if (soc_has_sdhc2()) {
+ clks[MPC512x_CLK_SDHC2_UG] = mpc512x_clk_divider(
+ "sdhc2-ug", "sdhc-x4", 0, &clkregs->scfr2,
+ 9, 7, CLK_DIVIDER_ONE_BASED);
+ }
+
+ clks[MPC512x_CLK_DIU_x4] = mpc512x_clk_factor("diu-x4", "csb", 4, 1);
+ clks[MPC512x_CLK_DIU_UG] = mpc512x_clk_divider("diu-ug", "diu-x4", 0,
+ &clkregs->scfr1, 0, 8,
+ CLK_DIVIDER_ONE_BASED);
+
+ /*
+ * the "power architecture PLL" was setup from data which was
+ * sampled from the reset config word, at this point in time the
+ * configuration can be considered fixed and read only (i.e. no
+ * longer adjustable, or no longer in need of adjustment), which
+ * is why we don't register a PLL here but assume fixed factors
+ */
+ mul = get_cpmf_mult_x2();
+ div = 2; /* compensate for the fractional factor */
+ clks[MPC512x_CLK_E300] = mpc512x_clk_factor("e300", "csb", mul, div);
+
+ if (soc_has_mbx()) {
+ clks[MPC512x_CLK_MBX_BUS_UG] = mpc512x_clk_factor(
+ "mbx-bus-ug", "csb", 1, 2);
+ clks[MPC512x_CLK_MBX_UG] = mpc512x_clk_divtable(
+ "mbx-ug", "mbx-bus-ug", &clkregs->scfr1,
+ 14, 3, divtab_1234);
+ clks[MPC512x_CLK_MBX_3D_UG] = mpc512x_clk_factor(
+ "mbx-3d-ug", "mbx-ug", 1, 1);
+ }
+ if (soc_has_pci()) {
+ clks[MPC512x_CLK_PCI_UG] = mpc512x_clk_divtable(
+ "pci-ug", "csb", &clkregs->scfr1,
+ 20, 3, divtab_2346);
+ }
+ if (soc_has_nfc_5125()) {
+ /*
+ * XXX TODO implement 5125 NFC clock setup logic,
+ * with high/low period counters in clkregs->scfr3,
+ * currently there are no users so it's ENOIMPL
+ */
+ clks[MPC512x_CLK_NFC_UG] = ERR_PTR(-ENOTSUPP);
+ } else {
+ clks[MPC512x_CLK_NFC_UG] = mpc512x_clk_divtable(
+ "nfc-ug", "ips", &clkregs->scfr1,
+ 8, 3, divtab_1234);
+ }
+ clks[MPC512x_CLK_LPC_UG] = mpc512x_clk_divtable("lpc-ug", "ips",
+ &clkregs->scfr1, 11, 3,
+ divtab_1234);
+
+ clks[MPC512x_CLK_LPC] = mpc512x_clk_gated("lpc", "lpc-ug",
+ &clkregs->sccr1, 30);
+ clks[MPC512x_CLK_NFC] = mpc512x_clk_gated("nfc", "nfc-ug",
+ &clkregs->sccr1, 29);
+ if (soc_has_pata()) {
+ clks[MPC512x_CLK_PATA] = mpc512x_clk_gated(
+ "pata", "ips", &clkregs->sccr1, 28);
+ }
+ /* for PSCs there is a "registers" gate and a bitrate MCLK subtree */
+ for (mclk_idx = 0; mclk_idx < soc_max_pscnum(); mclk_idx++) {
+ char name[12];
+ snprintf(name, sizeof(name), "psc%d", mclk_idx);
+ clks[MPC512x_CLK_PSC0 + mclk_idx] = mpc512x_clk_gated(
+ name, "ips", &clkregs->sccr1, 27 - mclk_idx);
+ mpc512x_clk_setup_mclk(&mclk_psc_data[mclk_idx], mclk_idx);
+ }
+ clks[MPC512x_CLK_PSC_FIFO] = mpc512x_clk_gated("psc-fifo", "ips",
+ &clkregs->sccr1, 15);
+ if (soc_has_sata()) {
+ clks[MPC512x_CLK_SATA] = mpc512x_clk_gated(
+ "sata", "ips", &clkregs->sccr1, 14);
+ }
+ clks[MPC512x_CLK_FEC] = mpc512x_clk_gated("fec", "ips",
+ &clkregs->sccr1, 13);
+ if (soc_has_pci()) {
+ clks[MPC512x_CLK_PCI] = mpc512x_clk_gated(
+ "pci", "pci-ug", &clkregs->sccr1, 11);
+ }
+ clks[MPC512x_CLK_DDR] = mpc512x_clk_gated("ddr", "ddr-ug",
+ &clkregs->sccr1, 10);
+ if (soc_has_fec2()) {
+ clks[MPC512x_CLK_FEC2] = mpc512x_clk_gated(
+ "fec2", "ips", &clkregs->sccr1, 9);
+ }
+
+ clks[MPC512x_CLK_DIU] = mpc512x_clk_gated("diu", "diu-ug",
+ &clkregs->sccr2, 31);
+ if (soc_has_axe()) {
+ clks[MPC512x_CLK_AXE] = mpc512x_clk_gated(
+ "axe", "csb", &clkregs->sccr2, 30);
+ }
+ clks[MPC512x_CLK_MEM] = mpc512x_clk_gated("mem", "ips",
+ &clkregs->sccr2, 29);
+ clks[MPC512x_CLK_USB1] = mpc512x_clk_gated("usb1", "csb",
+ &clkregs->sccr2, 28);
+ clks[MPC512x_CLK_USB2] = mpc512x_clk_gated("usb2", "csb",
+ &clkregs->sccr2, 27);
+ clks[MPC512x_CLK_I2C] = mpc512x_clk_gated("i2c", "ips",
+ &clkregs->sccr2, 26);
+ /* MSCAN differs from PSC with just one gate for multiple components */
+ clks[MPC512x_CLK_BDLC] = mpc512x_clk_gated("bdlc", "ips",
+ &clkregs->sccr2, 25);
+ for (mclk_idx = 0; mclk_idx < ARRAY_SIZE(mclk_mscan_data); mclk_idx++)
+ mpc512x_clk_setup_mclk(&mclk_mscan_data[mclk_idx], mclk_idx);
+ clks[MPC512x_CLK_SDHC] = mpc512x_clk_gated("sdhc", "sdhc-ug",
+ &clkregs->sccr2, 24);
+ /* there is only one SPDIF component, which shares MCLK support code */
+ if (soc_has_spdif()) {
+ clks[MPC512x_CLK_SPDIF] = mpc512x_clk_gated(
+ "spdif", "ips", &clkregs->sccr2, 23);
+ mpc512x_clk_setup_mclk(&mclk_spdif_data[0], 0);
+ }
+ if (soc_has_mbx()) {
+ clks[MPC512x_CLK_MBX_BUS] = mpc512x_clk_gated(
+ "mbx-bus", "mbx-bus-ug", &clkregs->sccr2, 22);
+ clks[MPC512x_CLK_MBX] = mpc512x_clk_gated(
+ "mbx", "mbx-ug", &clkregs->sccr2, 21);
+ clks[MPC512x_CLK_MBX_3D] = mpc512x_clk_gated(
+ "mbx-3d", "mbx-3d-ug", &clkregs->sccr2, 20);
+ }
+ clks[MPC512x_CLK_IIM] = mpc512x_clk_gated("iim", "csb",
+ &clkregs->sccr2, 19);
+ if (soc_has_viu()) {
+ clks[MPC512x_CLK_VIU] = mpc512x_clk_gated(
+ "viu", "csb", &clkregs->sccr2, 18);
+ }
+ if (soc_has_sdhc2()) {
+ clks[MPC512x_CLK_SDHC2] = mpc512x_clk_gated(
+ "sdhc-2", "sdhc2-ug", &clkregs->sccr2, 17);
+ }
+
+ if (soc_has_outclk()) {
+ size_t idx; /* used as mclk_idx, just to trim line length */
+ for (idx = 0; idx < ARRAY_SIZE(mclk_outclk_data); idx++)
+ mpc512x_clk_setup_mclk(&mclk_outclk_data[idx], idx);
+ }
+
+ /*
+ * externally provided clocks (when implemented in hardware,
+ * device tree may specify values which otherwise were unknown)
+ */
+ freq = get_freq_from_dt("psc_mclk_in");
+ if (!freq)
+ freq = 25000000;
+ clks[MPC512x_CLK_PSC_MCLK_IN] = mpc512x_clk_fixed("psc_mclk_in", freq);
+ if (soc_has_mclk_mux0_canin()) {
+ freq = get_freq_from_dt("can_clk_in");
+ clks[MPC512x_CLK_CAN_CLK_IN] = mpc512x_clk_fixed(
+ "can_clk_in", freq);
+ } else {
+ freq = get_freq_from_dt("spdif_tx_in");
+ clks[MPC512x_CLK_SPDIF_TX_IN] = mpc512x_clk_fixed(
+ "spdif_tx_in", freq);
+ freq = get_freq_from_dt("spdif_rx_in");
+ clks[MPC512x_CLK_SPDIF_TX_IN] = mpc512x_clk_fixed(
+ "spdif_rx_in", freq);
+ }
+
+ /* fixed frequency for AC97, always 24.567MHz */
+ clks[MPC512x_CLK_AC97] = mpc512x_clk_fixed("ac97", 24567000);
+
+ /*
+ * pre-enable those "internal" clock items which never get
+ * claimed by any peripheral driver, to not have the clock
+ * subsystem disable them late at startup
+ */
+ clk_prepare_enable(clks[MPC512x_CLK_DUMMY]);
+ clk_prepare_enable(clks[MPC512x_CLK_E300]); /* PowerPC CPU */
+ clk_prepare_enable(clks[MPC512x_CLK_DDR]); /* DRAM */
+ clk_prepare_enable(clks[MPC512x_CLK_MEM]); /* SRAM */
+ clk_prepare_enable(clks[MPC512x_CLK_IPS]); /* SoC periph */
+ clk_prepare_enable(clks[MPC512x_CLK_LPC]); /* boot media */
+}
+
+/*
+ * registers the set of public clocks (those listed in the dt-bindings/
+ * header file) for OF lookups, keeps the intermediates private to us
+ */
+static void mpc5121_clk_register_of_provider(struct device_node *np)
+{
+ clk_data.clks = clks;
+ clk_data.clk_num = MPC512x_CLK_LAST_PUBLIC + 1; /* _not_ ARRAY_SIZE() */
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+}
+
+/*
+ * temporary support for the period of time between introduction of CCF
+ * support and the adjustment of peripheral drivers to OF based lookups
+ */
+static void mpc5121_clk_provide_migration_support(void)
+{
+
+ /*
+ * pre-enable those clock items which are not yet appropriately
+ * acquired by their peripheral driver
+ *
+ * the PCI clock cannot get acquired by its peripheral driver,
+ * because for this platform the driver won't probe(), instead
+ * initialization is done from within the .setup_arch() routine
+ * at a point in time where the clock provider has not been
+ * setup yet and thus isn't available yet
+ *
+ * so we "pre-enable" the clock here, to not have the clock
+ * subsystem automatically disable this item in a late init call
+ *
+ * this PCI clock pre-enable workaround only applies when there
+ * are device tree nodes for PCI and thus the peripheral driver
+ * has attached to bridges, otherwise the PCI clock remains
+ * unused and so it gets disabled
+ */
+ clk_prepare_enable(clks[MPC512x_CLK_PSC3_MCLK]);/* serial console */
+ if (of_find_compatible_node(NULL, "pci", "fsl,mpc5121-pci"))
+ clk_prepare_enable(clks[MPC512x_CLK_PCI]);
+}
+
+/*
+ * those macros are not exactly pretty, but they encapsulate a lot
+ * of copy'n'paste heavy code which is even more ugly, and reduce
+ * the potential for inconsistencies in those many code copies
+ */
+#define FOR_NODES(compatname) \
+ for_each_compatible_node(np, NULL, compatname)
+
+#define NODE_PREP do { \
+ of_address_to_resource(np, 0, &res); \
+ snprintf(devname, sizeof(devname), "%08x.%s", res.start, np->name); \
+} while (0)
+
+#define NODE_CHK(clkname, clkitem, regnode, regflag) do { \
+ struct clk *clk; \
+ clk = of_clk_get_by_name(np, clkname); \
+ if (IS_ERR(clk)) { \
+ clk = clkitem; \
+ clk_register_clkdev(clk, clkname, devname); \
+ if (regnode) \
+ clk_register_clkdev(clk, clkname, np->name); \
+ did_register |= DID_REG_ ## regflag; \
+ pr_debug("clock alias name '%s' for dev '%s' pointer %p\n", \
+ clkname, devname, clk); \
+ } else { \
+ clk_put(clk); \
+ } \
+} while (0)
+
+/*
+ * register source code provided fallback results for clock lookups,
+ * these get consulted when OF based clock lookup fails (that is in the
+ * case of not yet adjusted device tree data, where clock related specs
+ * are missing)
+ */
+static void mpc5121_clk_provide_backwards_compat(void)
+{
+ enum did_reg_flags {
+ DID_REG_PSC = BIT(0),
+ DID_REG_PSCFIFO = BIT(1),
+ DID_REG_NFC = BIT(2),
+ DID_REG_CAN = BIT(3),
+ DID_REG_I2C = BIT(4),
+ DID_REG_DIU = BIT(5),
+ DID_REG_VIU = BIT(6),
+ DID_REG_FEC = BIT(7),
+ DID_REG_USB = BIT(8),
+ DID_REG_PATA = BIT(9),
+ };
+
+ int did_register;
+ struct device_node *np;
+ struct resource res;
+ int idx;
+ char devname[32];
+
+ did_register = 0;
+
+ FOR_NODES(mpc512x_select_psc_compat()) {
+ NODE_PREP;
+ idx = (res.start >> 8) & 0xf;
+ NODE_CHK("ipg", clks[MPC512x_CLK_PSC0 + idx], 0, PSC);
+ NODE_CHK("mclk", clks[MPC512x_CLK_PSC0_MCLK + idx], 0, PSC);
+ }
+
+ FOR_NODES("fsl,mpc5121-psc-fifo") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_PSC_FIFO], 1, PSCFIFO);
+ }
+
+ FOR_NODES("fsl,mpc5121-nfc") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_NFC], 0, NFC);
+ }
+
+ FOR_NODES("fsl,mpc5121-mscan") {
+ NODE_PREP;
+ idx = 0;
+ idx += (res.start & 0x2000) ? 2 : 0;
+ idx += (res.start & 0x0080) ? 1 : 0;
+ NODE_CHK("ipg", clks[MPC512x_CLK_BDLC], 0, CAN);
+ NODE_CHK("mclk", clks[MPC512x_CLK_MSCAN0_MCLK + idx], 0, CAN);
+ }
+
+ /*
+ * do register the 'ips', 'sys', and 'ref' names globally
+ * instead of inside each individual CAN node, as there is no
+ * potential for a name conflict (in contrast to 'ipg' and 'mclk')
+ */
+ if (did_register & DID_REG_CAN) {
+ clk_register_clkdev(clks[MPC512x_CLK_IPS], "ips", NULL);
+ clk_register_clkdev(clks[MPC512x_CLK_SYS], "sys", NULL);
+ clk_register_clkdev(clks[MPC512x_CLK_REF], "ref", NULL);
+ }
+
+ FOR_NODES("fsl,mpc5121-i2c") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_I2C], 0, I2C);
+ }
+
+ /*
+ * workaround for the fact that the I2C driver does an "anonymous"
+ * lookup (NULL name spec, which yields the first clock spec) for
+ * which we cannot register an alias -- a _global_ 'ipg' alias that
+ * is not bound to any device name and returns the I2C clock item
+ * is not a good idea
+ *
+ * so we have the lookup in the peripheral driver fail, which is
+ * silent and non-fatal, and pre-enable the clock item here such
+ * that register access is possible
+ *
+ * see commit b3bfce2b "i2c: mpc: cleanup clock API use" for
+ * details, adjusting s/NULL/"ipg"/ in i2c-mpc.c would make this
+ * workaround obsolete
+ */
+ if (did_register & DID_REG_I2C)
+ clk_prepare_enable(clks[MPC512x_CLK_I2C]);
+
+ FOR_NODES("fsl,mpc5121-diu") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_DIU], 1, DIU);
+ }
+
+ FOR_NODES("fsl,mpc5121-viu") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_VIU], 0, VIU);
+ }
+
+ /*
+ * note that 2771399a "fs_enet: cleanup clock API use" did use the
+ * "per" string for the clock lookup in contrast to the "ipg" name
+ * which most other nodes are using -- this is not a fatal thing
+ * but just something to keep in mind when doing compatibility
+ * registration, it's a non-issue with up-to-date device tree data
+ */
+ FOR_NODES("fsl,mpc5121-fec") {
+ NODE_PREP;
+ NODE_CHK("per", clks[MPC512x_CLK_FEC], 0, FEC);
+ }
+ FOR_NODES("fsl,mpc5121-fec-mdio") {
+ NODE_PREP;
+ NODE_CHK("per", clks[MPC512x_CLK_FEC], 0, FEC);
+ }
+ /*
+ * MPC5125 has two FECs: FEC1 at 0x2800, FEC2 at 0x4800;
+ * the clock items don't "form an array" since FEC2 was
+ * added only later and was not allowed to shift all other
+ * clock item indices, so the numbers aren't adjacent
+ */
+ FOR_NODES("fsl,mpc5125-fec") {
+ NODE_PREP;
+ if (res.start & 0x4000)
+ idx = MPC512x_CLK_FEC2;
+ else
+ idx = MPC512x_CLK_FEC;
+ NODE_CHK("per", clks[idx], 0, FEC);
+ }
+
+ FOR_NODES("fsl,mpc5121-usb2-dr") {
+ NODE_PREP;
+ idx = (res.start & 0x4000) ? 1 : 0;
+ NODE_CHK("ipg", clks[MPC512x_CLK_USB1 + idx], 0, USB);
+ }
+
+ FOR_NODES("fsl,mpc5121-pata") {
+ NODE_PREP;
+ NODE_CHK("ipg", clks[MPC512x_CLK_PATA], 0, PATA);
+ }
+
+ /*
+ * try to collapse diagnostics into a single line of output yet
+ * provide a full list of what is missing, to avoid noise in the
+ * absence of up-to-date device tree data -- backwards
+ * compatibility to old DTBs is a requirement, updates may be
+ * desirable or preferrable but are not at all mandatory
+ */
+ if (did_register) {
+ pr_notice("device tree lacks clock specs, adding fallbacks (0x%x,%s%s%s%s%s%s%s%s%s%s)\n",
+ did_register,
+ (did_register & DID_REG_PSC) ? " PSC" : "",
+ (did_register & DID_REG_PSCFIFO) ? " PSCFIFO" : "",
+ (did_register & DID_REG_NFC) ? " NFC" : "",
+ (did_register & DID_REG_CAN) ? " CAN" : "",
+ (did_register & DID_REG_I2C) ? " I2C" : "",
+ (did_register & DID_REG_DIU) ? " DIU" : "",
+ (did_register & DID_REG_VIU) ? " VIU" : "",
+ (did_register & DID_REG_FEC) ? " FEC" : "",
+ (did_register & DID_REG_USB) ? " USB" : "",
+ (did_register & DID_REG_PATA) ? " PATA" : "");
+ } else {
+ pr_debug("device tree has clock specs, no fallbacks added\n");
+ }
+}
+
+int __init mpc5121_clk_init(void)
+{
+ struct device_node *clk_np;
+ int busfreq;
+
+ /* map the clock control registers */
+ clk_np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
+ if (!clk_np)
+ return -ENODEV;
+ clkregs = of_iomap(clk_np, 0);
+ WARN_ON(!clkregs);
+
+ /* determine the SoC variant we run on */
+ mpc512x_clk_determine_soc();
+
+ /* invalidate all not yet registered clock slots */
+ mpc512x_clk_preset_data();
+
+ /*
+ * have the device tree scanned for "fixed-clock" nodes (which
+ * includes the oscillator node if the board's DT provides one)
+ */
+ of_clk_init(NULL);
+
+ /*
+ * add a dummy clock for those situations where a clock spec is
+ * required yet no real clock is involved
+ */
+ clks[MPC512x_CLK_DUMMY] = mpc512x_clk_fixed("dummy", 0);
+
+ /*
+ * have all the real nodes in the clock tree populated from REF
+ * down to all leaves, either starting from the OSC node or from
+ * a REF root that was created from the IPS bus clock input
+ */
+ busfreq = get_freq_from_dt("bus-frequency");
+ mpc512x_clk_setup_clock_tree(clk_np, busfreq);
+
+ /* register as an OF clock provider */
+ mpc5121_clk_register_of_provider(clk_np);
+
+ /*
+ * unbreak not yet adjusted peripheral drivers during migration
+ * towards fully operational common clock support, and allow
+ * operation in the absence of clock related device tree specs
+ */
+ mpc5121_clk_provide_migration_support();
+ mpc5121_clk_provide_backwards_compat();
+
+ return 0;
+}
+++ /dev/null
-/*
- * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. All rights reserved.
- *
- * Author: John Rigby <jrigby@freescale.com>
- *
- * Implements the clk api defined in include/linux/clk.h
- *
- * Original based on linux/arch/arm/mach-integrator/clock.c
- *
- * Copyright (C) 2004 ARM Limited.
- * Written by Deep Blue Solutions Limited.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/clk.h>
-#include <linux/mutex.h>
-#include <linux/io.h>
-
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <asm/mpc5xxx.h>
-#include <asm/mpc5121.h>
-#include <asm/clk_interface.h>
-
-#include "mpc512x.h"
-
-#undef CLK_DEBUG
-
-static int clocks_initialized;
-
-#define CLK_HAS_RATE 0x1 /* has rate in MHz */
-#define CLK_HAS_CTRL 0x2 /* has control reg and bit */
-
-struct clk {
- struct list_head node;
- char name[32];
- int flags;
- struct device *dev;
- unsigned long rate;
- struct module *owner;
- void (*calc) (struct clk *);
- struct clk *parent;
- int reg, bit; /* CLK_HAS_CTRL */
- int div_shift; /* only used by generic_div_clk_calc */
-};
-
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-
-static struct clk *mpc5121_clk_get(struct device *dev, const char *id)
-{
- struct clk *p, *clk = ERR_PTR(-ENOENT);
- int dev_match;
- int id_match;
-
- if (dev == NULL || id == NULL)
- return clk;
-
- mutex_lock(&clocks_mutex);
- list_for_each_entry(p, &clocks, node) {
- dev_match = id_match = 0;
-
- if (dev == p->dev)
- dev_match++;
- if (strcmp(id, p->name) == 0)
- id_match++;
- if ((dev_match || id_match) && try_module_get(p->owner)) {
- clk = p;
- break;
- }
- }
- mutex_unlock(&clocks_mutex);
-
- return clk;
-}
-
-#ifdef CLK_DEBUG
-static void dump_clocks(void)
-{
- struct clk *p;
-
- mutex_lock(&clocks_mutex);
- printk(KERN_INFO "CLOCKS:\n");
- list_for_each_entry(p, &clocks, node) {
- pr_info(" %s=%ld", p->name, p->rate);
- if (p->parent)
- pr_cont(" %s=%ld", p->parent->name,
- p->parent->rate);
- if (p->flags & CLK_HAS_CTRL)
- pr_cont(" reg/bit=%d/%d", p->reg, p->bit);
- pr_cont("\n");
- }
- mutex_unlock(&clocks_mutex);
-}
-#define DEBUG_CLK_DUMP() dump_clocks()
-#else
-#define DEBUG_CLK_DUMP()
-#endif
-
-
-static void mpc5121_clk_put(struct clk *clk)
-{
- module_put(clk->owner);
-}
-
-#define NRPSC 12
-
-struct mpc512x_clockctl {
- u32 spmr; /* System PLL Mode Reg */
- u32 sccr[2]; /* System Clk Ctrl Reg 1 & 2 */
- u32 scfr1; /* System Clk Freq Reg 1 */
- u32 scfr2; /* System Clk Freq Reg 2 */
- u32 reserved;
- u32 bcr; /* Bread Crumb Reg */
- u32 pccr[NRPSC]; /* PSC Clk Ctrl Reg 0-11 */
- u32 spccr; /* SPDIF Clk Ctrl Reg */
- u32 cccr; /* CFM Clk Ctrl Reg */
- u32 dccr; /* DIU Clk Cnfg Reg */
-};
-
-static struct mpc512x_clockctl __iomem *clockctl;
-
-static int mpc5121_clk_enable(struct clk *clk)
-{
- unsigned int mask;
-
- if (clk->flags & CLK_HAS_CTRL) {
- mask = in_be32(&clockctl->sccr[clk->reg]);
- mask |= 1 << clk->bit;
- out_be32(&clockctl->sccr[clk->reg], mask);
- }
- return 0;
-}
-
-static void mpc5121_clk_disable(struct clk *clk)
-{
- unsigned int mask;
-
- if (clk->flags & CLK_HAS_CTRL) {
- mask = in_be32(&clockctl->sccr[clk->reg]);
- mask &= ~(1 << clk->bit);
- out_be32(&clockctl->sccr[clk->reg], mask);
- }
-}
-
-static unsigned long mpc5121_clk_get_rate(struct clk *clk)
-{
- if (clk->flags & CLK_HAS_RATE)
- return clk->rate;
- else
- return 0;
-}
-
-static long mpc5121_clk_round_rate(struct clk *clk, unsigned long rate)
-{
- return rate;
-}
-
-static int mpc5121_clk_set_rate(struct clk *clk, unsigned long rate)
-{
- return 0;
-}
-
-static int clk_register(struct clk *clk)
-{
- mutex_lock(&clocks_mutex);
- list_add(&clk->node, &clocks);
- mutex_unlock(&clocks_mutex);
- return 0;
-}
-
-static unsigned long spmf_mult(void)
-{
- /*
- * Convert spmf to multiplier
- */
- static int spmf_to_mult[] = {
- 68, 1, 12, 16,
- 20, 24, 28, 32,
- 36, 40, 44, 48,
- 52, 56, 60, 64
- };
- int spmf = (in_be32(&clockctl->spmr) >> 24) & 0xf;
- return spmf_to_mult[spmf];
-}
-
-static unsigned long sysdiv_div_x_2(void)
-{
- /*
- * Convert sysdiv to divisor x 2
- * Some divisors have fractional parts so
- * multiply by 2 then divide by this value
- */
- static int sysdiv_to_div_x_2[] = {
- 4, 5, 6, 7,
- 8, 9, 10, 14,
- 12, 16, 18, 22,
- 20, 24, 26, 30,
- 28, 32, 34, 38,
- 36, 40, 42, 46,
- 44, 48, 50, 54,
- 52, 56, 58, 62,
- 60, 64, 66,
- };
- int sysdiv = (in_be32(&clockctl->scfr2) >> 26) & 0x3f;
- return sysdiv_to_div_x_2[sysdiv];
-}
-
-static unsigned long ref_to_sys(unsigned long rate)
-{
- rate *= spmf_mult();
- rate *= 2;
- rate /= sysdiv_div_x_2();
-
- return rate;
-}
-
-static unsigned long sys_to_ref(unsigned long rate)
-{
- rate *= sysdiv_div_x_2();
- rate /= 2;
- rate /= spmf_mult();
-
- return rate;
-}
-
-static long ips_to_ref(unsigned long rate)
-{
- int ips_div = (in_be32(&clockctl->scfr1) >> 23) & 0x7;
-
- rate *= ips_div; /* csb_clk = ips_clk * ips_div */
- rate *= 2; /* sys_clk = csb_clk * 2 */
- return sys_to_ref(rate);
-}
-
-static unsigned long devtree_getfreq(char *clockname)
-{
- struct device_node *np;
- const unsigned int *prop;
- unsigned int val = 0;
-
- np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-immr");
- if (np) {
- prop = of_get_property(np, clockname, NULL);
- if (prop)
- val = *prop;
- of_node_put(np);
- }
- return val;
-}
-
-static void ref_clk_calc(struct clk *clk)
-{
- unsigned long rate;
-
- rate = devtree_getfreq("bus-frequency");
- if (rate == 0) {
- printk(KERN_ERR "No bus-frequency in dev tree\n");
- clk->rate = 0;
- return;
- }
- clk->rate = ips_to_ref(rate);
-}
-
-static struct clk ref_clk = {
- .name = "ref_clk",
- .calc = ref_clk_calc,
-};
-
-
-static void sys_clk_calc(struct clk *clk)
-{
- clk->rate = ref_to_sys(ref_clk.rate);
-}
-
-static struct clk sys_clk = {
- .name = "sys_clk",
- .calc = sys_clk_calc,
-};
-
-static void diu_clk_calc(struct clk *clk)
-{
- int diudiv_x_2 = in_be32(&clockctl->scfr1) & 0xff;
- unsigned long rate;
-
- rate = sys_clk.rate;
-
- rate *= 2;
- rate /= diudiv_x_2;
-
- clk->rate = rate;
-}
-
-static void viu_clk_calc(struct clk *clk)
-{
- unsigned long rate;
-
- rate = sys_clk.rate;
- rate /= 2;
- clk->rate = rate;
-}
-
-static void half_clk_calc(struct clk *clk)
-{
- clk->rate = clk->parent->rate / 2;
-}
-
-static void generic_div_clk_calc(struct clk *clk)
-{
- int div = (in_be32(&clockctl->scfr1) >> clk->div_shift) & 0x7;
-
- clk->rate = clk->parent->rate / div;
-}
-
-static void unity_clk_calc(struct clk *clk)
-{
- clk->rate = clk->parent->rate;
-}
-
-static struct clk csb_clk = {
- .name = "csb_clk",
- .calc = half_clk_calc,
- .parent = &sys_clk,
-};
-
-static void e300_clk_calc(struct clk *clk)
-{
- int spmf = (in_be32(&clockctl->spmr) >> 16) & 0xf;
- int ratex2 = clk->parent->rate * spmf;
-
- clk->rate = ratex2 / 2;
-}
-
-static struct clk e300_clk = {
- .name = "e300_clk",
- .calc = e300_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk ips_clk = {
- .name = "ips_clk",
- .calc = generic_div_clk_calc,
- .parent = &csb_clk,
- .div_shift = 23,
-};
-
-/*
- * Clocks controlled by SCCR1 (.reg = 0)
- */
-static struct clk lpc_clk = {
- .name = "lpc_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 30,
- .calc = generic_div_clk_calc,
- .parent = &ips_clk,
- .div_shift = 11,
-};
-
-static struct clk nfc_clk = {
- .name = "nfc_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 29,
- .calc = generic_div_clk_calc,
- .parent = &ips_clk,
- .div_shift = 8,
-};
-
-static struct clk pata_clk = {
- .name = "pata_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 28,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-/*
- * PSC clocks (bits 27 - 16)
- * are setup elsewhere
- */
-
-static struct clk sata_clk = {
- .name = "sata_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 14,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-static struct clk fec_clk = {
- .name = "fec_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 13,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-static struct clk pci_clk = {
- .name = "pci_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 0,
- .bit = 11,
- .calc = generic_div_clk_calc,
- .parent = &csb_clk,
- .div_shift = 20,
-};
-
-/*
- * Clocks controlled by SCCR2 (.reg = 1)
- */
-static struct clk diu_clk = {
- .name = "diu_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 31,
- .calc = diu_clk_calc,
-};
-
-static struct clk viu_clk = {
- .name = "viu_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 18,
- .calc = viu_clk_calc,
-};
-
-static struct clk axe_clk = {
- .name = "axe_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 30,
- .calc = unity_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk usb1_clk = {
- .name = "usb1_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 28,
- .calc = unity_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk usb2_clk = {
- .name = "usb2_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 27,
- .calc = unity_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk i2c_clk = {
- .name = "i2c_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 26,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-static struct clk mscan_clk = {
- .name = "mscan_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 25,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-static struct clk sdhc_clk = {
- .name = "sdhc_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 24,
- .calc = unity_clk_calc,
- .parent = &ips_clk,
-};
-
-static struct clk mbx_bus_clk = {
- .name = "mbx_bus_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 22,
- .calc = half_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk mbx_clk = {
- .name = "mbx_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 21,
- .calc = unity_clk_calc,
- .parent = &csb_clk,
-};
-
-static struct clk mbx_3d_clk = {
- .name = "mbx_3d_clk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 20,
- .calc = generic_div_clk_calc,
- .parent = &mbx_bus_clk,
- .div_shift = 14,
-};
-
-static void psc_mclk_in_calc(struct clk *clk)
-{
- clk->rate = devtree_getfreq("psc_mclk_in");
- if (!clk->rate)
- clk->rate = 25000000;
-}
-
-static struct clk psc_mclk_in = {
- .name = "psc_mclk_in",
- .calc = psc_mclk_in_calc,
-};
-
-static struct clk spdif_txclk = {
- .name = "spdif_txclk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 23,
-};
-
-static struct clk spdif_rxclk = {
- .name = "spdif_rxclk",
- .flags = CLK_HAS_CTRL,
- .reg = 1,
- .bit = 23,
-};
-
-static void ac97_clk_calc(struct clk *clk)
-{
- /* ac97 bit clock is always 24.567 MHz */
- clk->rate = 24567000;
-}
-
-static struct clk ac97_clk = {
- .name = "ac97_clk_in",
- .calc = ac97_clk_calc,
-};
-
-static struct clk *rate_clks[] = {
- &ref_clk,
- &sys_clk,
- &diu_clk,
- &viu_clk,
- &csb_clk,
- &e300_clk,
- &ips_clk,
- &fec_clk,
- &sata_clk,
- &pata_clk,
- &nfc_clk,
- &lpc_clk,
- &mbx_bus_clk,
- &mbx_clk,
- &mbx_3d_clk,
- &axe_clk,
- &usb1_clk,
- &usb2_clk,
- &i2c_clk,
- &mscan_clk,
- &sdhc_clk,
- &pci_clk,
- &psc_mclk_in,
- &spdif_txclk,
- &spdif_rxclk,
- &ac97_clk,
- NULL
-};
-
-static void rate_clk_init(struct clk *clk)
-{
- if (clk->calc) {
- clk->calc(clk);
- clk->flags |= CLK_HAS_RATE;
- clk_register(clk);
- } else {
- printk(KERN_WARNING
- "Could not initialize clk %s without a calc routine\n",
- clk->name);
- }
-}
-
-static void rate_clks_init(void)
-{
- struct clk **cpp, *clk;
-
- cpp = rate_clks;
- while ((clk = *cpp++))
- rate_clk_init(clk);
-}
-
-/*
- * There are two clk enable registers with 32 enable bits each
- * psc clocks and device clocks are all stored in dev_clks
- */
-static struct clk dev_clks[2][32];
-
-/*
- * Given a psc number return the dev_clk
- * associated with it
- */
-static struct clk *psc_dev_clk(int pscnum)
-{
- int reg, bit;
- struct clk *clk;
-
- reg = 0;
- bit = 27 - pscnum;
-
- clk = &dev_clks[reg][bit];
- clk->reg = 0;
- clk->bit = bit;
- return clk;
-}
-
-/*
- * PSC clock rate calculation
- */
-static void psc_calc_rate(struct clk *clk, int pscnum, struct device_node *np)
-{
- unsigned long mclk_src = sys_clk.rate;
- unsigned long mclk_div;
-
- /*
- * Can only change value of mclk divider
- * when the divider is disabled.
- *
- * Zero is not a valid divider so minimum
- * divider is 1
- *
- * disable/set divider/enable
- */
- out_be32(&clockctl->pccr[pscnum], 0);
- out_be32(&clockctl->pccr[pscnum], 0x00020000);
- out_be32(&clockctl->pccr[pscnum], 0x00030000);
-
- if (in_be32(&clockctl->pccr[pscnum]) & 0x80) {
- clk->rate = spdif_rxclk.rate;
- return;
- }
-
- switch ((in_be32(&clockctl->pccr[pscnum]) >> 14) & 0x3) {
- case 0:
- mclk_src = sys_clk.rate;
- break;
- case 1:
- mclk_src = ref_clk.rate;
- break;
- case 2:
- mclk_src = psc_mclk_in.rate;
- break;
- case 3:
- mclk_src = spdif_txclk.rate;
- break;
- }
-
- mclk_div = ((in_be32(&clockctl->pccr[pscnum]) >> 17) & 0x7fff) + 1;
- clk->rate = mclk_src / mclk_div;
-}
-
-/*
- * Find all psc nodes in device tree and assign a clock
- * with name "psc%d_mclk" and dev pointing at the device
- * returned from of_find_device_by_node
- */
-static void psc_clks_init(void)
-{
- struct device_node *np;
- struct platform_device *ofdev;
- u32 reg;
- const char *psc_compat;
-
- psc_compat = mpc512x_select_psc_compat();
- if (!psc_compat)
- return;
-
- for_each_compatible_node(np, NULL, psc_compat) {
- if (!of_property_read_u32(np, "reg", ®)) {
- int pscnum = (reg & 0xf00) >> 8;
- struct clk *clk = psc_dev_clk(pscnum);
-
- clk->flags = CLK_HAS_RATE | CLK_HAS_CTRL;
- ofdev = of_find_device_by_node(np);
- clk->dev = &ofdev->dev;
- /*
- * AC97 is special rate clock does
- * not go through normal path
- */
- if (of_device_is_compatible(np, "fsl,mpc5121-psc-ac97"))
- clk->rate = ac97_clk.rate;
- else
- psc_calc_rate(clk, pscnum, np);
- sprintf(clk->name, "psc%d_mclk", pscnum);
- clk_register(clk);
- clk_enable(clk);
- }
- }
-}
-
-static struct clk_interface mpc5121_clk_functions = {
- .clk_get = mpc5121_clk_get,
- .clk_enable = mpc5121_clk_enable,
- .clk_disable = mpc5121_clk_disable,
- .clk_get_rate = mpc5121_clk_get_rate,
- .clk_put = mpc5121_clk_put,
- .clk_round_rate = mpc5121_clk_round_rate,
- .clk_set_rate = mpc5121_clk_set_rate,
- .clk_set_parent = NULL,
- .clk_get_parent = NULL,
-};
-
-int __init mpc5121_clk_init(void)
-{
- struct device_node *np;
-
- np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
- if (np) {
- clockctl = of_iomap(np, 0);
- of_node_put(np);
- }
-
- if (!clockctl) {
- printk(KERN_ERR "Could not map clock control registers\n");
- return 0;
- }
-
- rate_clks_init();
- psc_clks_init();
-
- /* leave clockctl mapped forever */
- /*iounmap(clockctl); */
- DEBUG_CLK_DUMP();
- clocks_initialized++;
- clk_functions = mpc5121_clk_functions;
- return 0;
-}
* (at your option) any later version.
*/
+#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/irq.h>
bool in_use;
};
-#define DIU_DIV_MASK 0x000000ff
+/* receives a pixel clock spec in pico seconds, adjusts the DIU clock rate */
static void mpc512x_set_pixel_clock(unsigned int pixclock)
{
- unsigned long bestval, bestfreq, speed, busfreq;
- unsigned long minpixclock, maxpixclock, pixval;
- struct mpc512x_ccm __iomem *ccm;
struct device_node *np;
- u32 temp;
- long err;
- int i;
+ struct clk *clk_diu;
+ unsigned long epsilon, minpixclock, maxpixclock;
+ unsigned long offset, want, got, delta;
- np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
+ /* lookup and enable the DIU clock */
+ np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-diu");
if (!np) {
- pr_err("Can't find clock control module.\n");
+ pr_err("Could not find DIU device tree node.\n");
return;
}
-
- ccm = of_iomap(np, 0);
+ clk_diu = of_clk_get(np, 0);
+ if (IS_ERR(clk_diu)) {
+ /* backwards compat with device trees that lack clock specs */
+ clk_diu = clk_get_sys(np->name, "ipg");
+ }
of_node_put(np);
- if (!ccm) {
- pr_err("Can't map clock control module reg.\n");
+ if (IS_ERR(clk_diu)) {
+ pr_err("Could not lookup DIU clock.\n");
return;
}
-
- np = of_find_node_by_type(NULL, "cpu");
- if (np) {
- const unsigned int *prop =
- of_get_property(np, "bus-frequency", NULL);
-
- of_node_put(np);
- if (prop) {
- busfreq = *prop;
- } else {
- pr_err("Can't get bus-frequency property\n");
- return;
- }
- } else {
- pr_err("Can't find 'cpu' node.\n");
+ if (clk_prepare_enable(clk_diu)) {
+ pr_err("Could not enable DIU clock.\n");
return;
}
- /* Pixel Clock configuration */
- pr_debug("DIU: Bus Frequency = %lu\n", busfreq);
- speed = busfreq * 4; /* DIU_DIV ratio is 4 * CSB_CLK / DIU_CLK */
-
- /* Calculate the pixel clock with the smallest error */
- /* calculate the following in steps to avoid overflow */
- pr_debug("DIU pixclock in ps - %d\n", pixclock);
- temp = (1000000000 / pixclock) * 1000;
- pixclock = temp;
- pr_debug("DIU pixclock freq - %u\n", pixclock);
-
- temp = temp / 20; /* pixclock * 0.05 */
- pr_debug("deviation = %d\n", temp);
- minpixclock = pixclock - temp;
- maxpixclock = pixclock + temp;
- pr_debug("DIU minpixclock - %lu\n", minpixclock);
- pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
- pixval = speed/pixclock;
- pr_debug("DIU pixval = %lu\n", pixval);
-
- err = LONG_MAX;
- bestval = pixval;
- pr_debug("DIU bestval = %lu\n", bestval);
-
- bestfreq = 0;
- for (i = -1; i <= 1; i++) {
- temp = speed / (pixval+i);
- pr_debug("DIU test pixval i=%d, pixval=%lu, temp freq. = %u\n",
- i, pixval, temp);
- if ((temp < minpixclock) || (temp > maxpixclock))
- pr_debug("DIU exceeds monitor range (%lu to %lu)\n",
- minpixclock, maxpixclock);
- else if (abs(temp - pixclock) < err) {
- pr_debug("Entered the else if block %d\n", i);
- err = abs(temp - pixclock);
- bestval = pixval + i;
- bestfreq = temp;
- }
+ /*
+ * convert the picoseconds spec into the desired clock rate,
+ * determine the acceptable clock range for the monitor (+/- 5%),
+ * do the calculation in steps to avoid integer overflow
+ */
+ pr_debug("DIU pixclock in ps - %u\n", pixclock);
+ pixclock = (1000000000 / pixclock) * 1000;
+ pr_debug("DIU pixclock freq - %u\n", pixclock);
+ epsilon = pixclock / 20; /* pixclock * 0.05 */
+ pr_debug("DIU deviation - %lu\n", epsilon);
+ minpixclock = pixclock - epsilon;
+ maxpixclock = pixclock + epsilon;
+ pr_debug("DIU minpixclock - %lu\n", minpixclock);
+ pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
+
+ /*
+ * check whether the DIU supports the desired pixel clock
+ *
+ * - simply request the desired clock and see what the
+ * platform's clock driver will make of it, assuming that it
+ * will setup the best approximation of the requested value
+ * - try other candidate frequencies in the order of decreasing
+ * preference (i.e. with increasing distance from the desired
+ * pixel clock, and checking the lower frequency before the
+ * higher frequency to not overload the hardware) until the
+ * first match is found -- any potential subsequent match
+ * would only be as good as the former match or typically
+ * would be less preferrable
+ *
+ * the offset increment of pixelclock divided by 64 is an
+ * arbitrary choice -- it's simple to calculate, in the typical
+ * case we expect the first check to succeed already, in the
+ * worst case seven frequencies get tested (the exact center and
+ * three more values each to the left and to the right) before
+ * the 5% tolerance window is exceeded, resulting in fast enough
+ * execution yet high enough probability of finding a suitable
+ * value, while the error rate will be in the order of single
+ * percents
+ */
+ for (offset = 0; offset <= epsilon; offset += pixclock / 64) {
+ want = pixclock - offset;
+ pr_debug("DIU checking clock - %lu\n", want);
+ clk_set_rate(clk_diu, want);
+ got = clk_get_rate(clk_diu);
+ delta = abs(pixclock - got);
+ if (delta < epsilon)
+ break;
+ if (!offset)
+ continue;
+ want = pixclock + offset;
+ pr_debug("DIU checking clock - %lu\n", want);
+ clk_set_rate(clk_diu, want);
+ got = clk_get_rate(clk_diu);
+ delta = abs(pixclock - got);
+ if (delta < epsilon)
+ break;
}
+ if (offset <= epsilon) {
+ pr_debug("DIU clock accepted - %lu\n", want);
+ pr_debug("DIU pixclock want %u, got %lu, delta %lu, eps %lu\n",
+ pixclock, got, delta, epsilon);
+ return;
+ }
+ pr_warn("DIU pixclock auto search unsuccessful\n");
- pr_debug("DIU chose = %lx\n", bestval);
- pr_debug("DIU error = %ld\n NomPixClk ", err);
- pr_debug("DIU: Best Freq = %lx\n", bestfreq);
- /* Modify DIU_DIV in CCM SCFR1 */
- temp = in_be32(&ccm->scfr1);
- pr_debug("DIU: Current value of SCFR1: 0x%08x\n", temp);
- temp &= ~DIU_DIV_MASK;
- temp |= (bestval & DIU_DIV_MASK);
- out_be32(&ccm->scfr1, temp);
- pr_debug("DIU: Modified value of SCFR1: 0x%08x\n", temp);
- iounmap(ccm);
+ /*
+ * what is the most appropriate action to take when the search
+ * for an available pixel clock which is acceptable to the
+ * monitor has failed? disable the DIU (clock) or just provide
+ * a "best effort"? we go with the latter
+ */
+ pr_warn("DIU pixclock best effort fallback (backend's choice)\n");
+ clk_set_rate(clk_diu, pixclock);
+ got = clk_get_rate(clk_diu);
+ delta = abs(pixclock - got);
+ pr_debug("DIU pixclock want %u, got %lu, delta %lu, eps %lu\n",
+ pixclock, got, delta, epsilon);
}
static enum fsl_diu_monitor_port
config PPC_MPC52xx
bool "52xx-based boards"
depends on 6xx
- select PPC_CLOCK
+ select COMMON_CLK
select PPC_PCI_CHOICE
config PPC_MPC5200_SIMPLE
#include <linux/of_fdt.h>
#include <linux/interrupt.h>
#include <linux/bug.h>
+#include <linux/cpuidle.h>
#include <asm/machdep.h>
#include <asm/firmware.h>
return 1;
}
+void powernv_idle(void)
+{
+ /* Hook to cpuidle framework if available, else
+ * call on default platform idle code
+ */
+ if (cpuidle_idle_call()) {
+ power7_idle();
+ }
+}
+
define_machine(powernv) {
.name = "PowerNV",
.probe = pnv_probe,
.show_cpuinfo = pnv_show_cpuinfo,
.progress = pnv_progress,
.machine_shutdown = pnv_shutdown,
- .power_save = power7_idle,
+ .power_save = powernv_idle,
.calibrate_decr = generic_calibrate_decr,
#ifdef CONFIG_KEXEC
.kexec_cpu_down = pnv_kexec_cpu_down,
which are accessible through a debugfs file.
Say N if you are unsure.
-
-config PSERIES_IDLE
- bool "Cpuidle driver for pSeries platforms"
- depends on CPU_IDLE
- depends on PPC_PSERIES
- default y
- help
- Select this option to enable processor idle state management
- through cpuidle subsystem.
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_DTL) += dtl.o
obj-$(CONFIG_IO_EVENT_IRQ) += io_event_irq.o
-obj-$(CONFIG_PSERIES_IDLE) += processor_idle.o
obj-$(CONFIG_LPARCFG) += lparcfg.o
ifeq ($(CONFIG_PPC_PSERIES),y)
iommu_table_dart.it_offset = 0;
/* it_size is in number of entries */
iommu_table_dart.it_size = dart_tablesize / sizeof(u32);
+ iommu_table_dart.it_page_shift = IOMMU_PAGE_SHIFT_4K;
/* Initialize the common IOMMU code */
iommu_table_dart.it_base = (unsigned long)dart_vbase;
source "drivers/cpuidle/Kconfig.arm"
endmenu
+menu "POWERPC CPU Idle Drivers"
+depends on PPC
+source "drivers/cpuidle/Kconfig.powerpc"
+endmenu
+
endif
config ARCH_NEEDS_CPU_IDLE_COUPLED
--- /dev/null
+#
+# POWERPC CPU Idle Drivers
+#
+config PSERIES_CPUIDLE
+ bool "Cpuidle driver for pSeries platforms"
+ depends on CPU_IDLE
+ depends on PPC_PSERIES
+ default y
+ help
+ Select this option to enable processor idle state management
+ through cpuidle subsystem.
+
+config POWERNV_CPUIDLE
+ bool "Cpuidle driver for powernv platforms"
+ depends on CPU_IDLE
+ depends on PPC_POWERNV
+ default y
+ help
+ Select this option to enable processor idle state management
+ through cpuidle subsystem.
obj-$(CONFIG_ARM_ZYNQ_CPUIDLE) += cpuidle-zynq.o
obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o
obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o
+
+###############################################################################
+# POWERPC drivers
+obj-$(CONFIG_PSERIES_CPUIDLE) += cpuidle-pseries.o
+obj-$(CONFIG_POWERNV_CPUIDLE) += cpuidle-powernv.o
--- /dev/null
+/*
+ * cpuidle-powernv - idle state cpuidle driver.
+ * Adapted from drivers/cpuidle/cpuidle-pseries
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/cpuidle.h>
+#include <linux/cpu.h>
+#include <linux/notifier.h>
+
+#include <asm/machdep.h>
+#include <asm/firmware.h>
+
+struct cpuidle_driver powernv_idle_driver = {
+ .name = "powernv_idle",
+ .owner = THIS_MODULE,
+};
+
+static int max_idle_state;
+static struct cpuidle_state *cpuidle_state_table;
+
+static int snooze_loop(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ local_irq_enable();
+ set_thread_flag(TIF_POLLING_NRFLAG);
+
+ while (!need_resched()) {
+ HMT_low();
+ HMT_very_low();
+ }
+
+ HMT_medium();
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb();
+ return index;
+}
+
+static int nap_loop(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ power7_idle();
+ return index;
+}
+
+/*
+ * States for dedicated partition case.
+ */
+static struct cpuidle_state powernv_states[] = {
+ { /* Snooze */
+ .name = "snooze",
+ .desc = "snooze",
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .exit_latency = 0,
+ .target_residency = 0,
+ .enter = &snooze_loop },
+ { /* NAP */
+ .name = "NAP",
+ .desc = "NAP",
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .exit_latency = 10,
+ .target_residency = 100,
+ .enter = &nap_loop },
+};
+
+static int powernv_cpuidle_add_cpu_notifier(struct notifier_block *n,
+ unsigned long action, void *hcpu)
+{
+ int hotcpu = (unsigned long)hcpu;
+ struct cpuidle_device *dev =
+ per_cpu(cpuidle_devices, hotcpu);
+
+ if (dev && cpuidle_get_driver()) {
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ cpuidle_pause_and_lock();
+ cpuidle_enable_device(dev);
+ cpuidle_resume_and_unlock();
+ break;
+
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ cpuidle_pause_and_lock();
+ cpuidle_disable_device(dev);
+ cpuidle_resume_and_unlock();
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block setup_hotplug_notifier = {
+ .notifier_call = powernv_cpuidle_add_cpu_notifier,
+};
+
+/*
+ * powernv_cpuidle_driver_init()
+ */
+static int powernv_cpuidle_driver_init(void)
+{
+ int idle_state;
+ struct cpuidle_driver *drv = &powernv_idle_driver;
+
+ drv->state_count = 0;
+
+ for (idle_state = 0; idle_state < max_idle_state; ++idle_state) {
+ /* Is the state not enabled? */
+ if (cpuidle_state_table[idle_state].enter == NULL)
+ continue;
+
+ drv->states[drv->state_count] = /* structure copy */
+ cpuidle_state_table[idle_state];
+
+ drv->state_count += 1;
+ }
+
+ return 0;
+}
+
+/*
+ * powernv_idle_probe()
+ * Choose state table for shared versus dedicated partition
+ */
+static int powernv_idle_probe(void)
+{
+
+ if (cpuidle_disable != IDLE_NO_OVERRIDE)
+ return -ENODEV;
+
+ if (firmware_has_feature(FW_FEATURE_OPALv3)) {
+ cpuidle_state_table = powernv_states;
+ max_idle_state = ARRAY_SIZE(powernv_states);
+ } else
+ return -ENODEV;
+
+ return 0;
+}
+
+static int __init powernv_processor_idle_init(void)
+{
+ int retval;
+
+ retval = powernv_idle_probe();
+ if (retval)
+ return retval;
+
+ powernv_cpuidle_driver_init();
+ retval = cpuidle_register(&powernv_idle_driver, NULL);
+ if (retval) {
+ printk(KERN_DEBUG "Registration of powernv driver failed.\n");
+ return retval;
+ }
+
+ register_cpu_notifier(&setup_hotplug_notifier);
+ printk(KERN_DEBUG "powernv_idle_driver registered\n");
+ return 0;
+}
+
+device_initcall(powernv_processor_idle_init);
/*
- * processor_idle - idle state cpuidle driver.
+ * cpuidle-pseries - idle state cpuidle driver.
* Adapted from drivers/idle/intel_idle.c and
* drivers/acpi/processor_idle.c
*
.owner = THIS_MODULE,
};
-#define MAX_IDLE_STATE_COUNT 2
-
-static int max_idle_state = MAX_IDLE_STATE_COUNT - 1;
+static int max_idle_state;
static struct cpuidle_state *cpuidle_state_table;
static inline void idle_loop_prolog(unsigned long *in_purr)
int index)
{
unsigned long in_purr;
- int cpu = dev->cpu;
idle_loop_prolog(&in_purr);
local_irq_enable();
set_thread_flag(TIF_POLLING_NRFLAG);
- while ((!need_resched()) && cpu_online(cpu)) {
+ while (!need_resched()) {
HMT_low();
HMT_very_low();
}
/*
* States for dedicated partition case.
*/
-static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = {
+static struct cpuidle_state dedicated_states[] = {
{ /* Snooze */
.name = "snooze",
.desc = "snooze",
/*
* States for shared partition case.
*/
-static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = {
+static struct cpuidle_state shared_states[] = {
{ /* Shared Cede */
.name = "Shared Cede",
.desc = "Shared Cede",
.enter = &shared_cede_loop },
};
-void update_smt_snooze_delay(int cpu, int residency)
-{
- struct cpuidle_driver *drv = cpuidle_get_driver();
- struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
-
- if (cpuidle_state_table != dedicated_states)
- return;
-
- if (residency < 0) {
- /* Disable the Nap state on that cpu */
- if (dev)
- dev->states_usage[1].disable = 1;
- } else
- if (drv)
- drv->states[1].target_residency = residency;
-}
-
static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n,
unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
struct cpuidle_device *dev =
- per_cpu_ptr(cpuidle_devices, hotcpu);
+ per_cpu(cpuidle_devices, hotcpu);
if (dev && cpuidle_get_driver()) {
switch (action) {
drv->state_count = 0;
- for (idle_state = 0; idle_state < MAX_IDLE_STATE_COUNT; ++idle_state) {
-
- if (idle_state > max_idle_state)
- break;
-
- /* is the state not enabled? */
+ for (idle_state = 0; idle_state < max_idle_state; ++idle_state) {
+ /* Is the state not enabled? */
if (cpuidle_state_table[idle_state].enter == NULL)
continue;
static int pseries_idle_probe(void)
{
- if (!firmware_has_feature(FW_FEATURE_SPLPAR))
- return -ENODEV;
-
if (cpuidle_disable != IDLE_NO_OVERRIDE)
return -ENODEV;
- if (max_idle_state == 0) {
- printk(KERN_DEBUG "pseries processor idle disabled.\n");
- return -EPERM;
- }
-
- if (lppaca_shared_proc(get_lppaca()))
- cpuidle_state_table = shared_states;
- else
- cpuidle_state_table = dedicated_states;
+ if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
+ if (lppaca_shared_proc(get_lppaca())) {
+ cpuidle_state_table = shared_states;
+ max_idle_state = ARRAY_SIZE(shared_states);
+ } else {
+ cpuidle_state_table = dedicated_states;
+ max_idle_state = ARRAY_SIZE(dedicated_states);
+ }
+ } else
+ return -ENODEV;
return 0;
}
register_cpu_notifier(&setup_hotplug_notifier);
printk(KERN_DEBUG "pseries_idle_driver registered\n");
-
return 0;
}
-static void __exit pseries_processor_idle_exit(void)
-{
-
- unregister_cpu_notifier(&setup_hotplug_notifier);
- cpuidle_unregister(&pseries_idle_driver);
-
- return;
-}
-
-module_init(pseries_processor_idle_init);
-module_exit(pseries_processor_idle_exit);
-
-MODULE_AUTHOR("Deepthi Dharwar <deepthi@linux.vnet.ibm.com>");
-MODULE_DESCRIPTION("Cpuidle driver for POWER");
-MODULE_LICENSE("GPL");
+device_initcall(pseries_processor_idle_init);
}
/* enable VIU clock */
- clk = devm_clk_get(&op->dev, "viu_clk");
+ clk = devm_clk_get(&op->dev, "ipg");
if (IS_ERR(clk)) {
dev_err(&op->dev, "failed to lookup the clock!\n");
ret = PTR_ERR(clk);
of_node_put(rootnode);
/* Enable NFC clock */
- clk = devm_clk_get(dev, "nfc_clk");
+ clk = devm_clk_get(dev, "ipg");
if (IS_ERR(clk)) {
dev_err(dev, "Unable to acquire NFC clock!\n");
retval = PTR_ERR(clk);
#endif /* CONFIG_PPC_MPC52xx */
#ifdef CONFIG_PPC_MPC512x
-struct mpc512x_clockctl {
- u32 spmr; /* System PLL Mode Reg */
- u32 sccr[2]; /* System Clk Ctrl Reg 1 & 2 */
- u32 scfr1; /* System Clk Freq Reg 1 */
- u32 scfr2; /* System Clk Freq Reg 2 */
- u32 reserved;
- u32 bcr; /* Bread Crumb Reg */
- u32 pccr[12]; /* PSC Clk Ctrl Reg 0-11 */
- u32 spccr; /* SPDIF Clk Ctrl Reg */
- u32 cccr; /* CFM Clk Ctrl Reg */
- u32 dccr; /* DIU Clk Cnfg Reg */
- u32 mccr[4]; /* MSCAN Clk Ctrl Reg 1-3 */
-};
-
-static struct of_device_id mpc512x_clock_ids[] = {
- { .compatible = "fsl,mpc5121-clock", },
- {}
-};
-
static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
- const char *clock_name, int *mscan_clksrc)
+ const char *clock_source, int *mscan_clksrc)
{
- struct mpc512x_clockctl __iomem *clockctl;
- struct device_node *np_clock;
- struct clk *sys_clk, *ref_clk;
- int plen, clockidx, clocksrc = -1;
- u32 sys_freq, val, clockdiv = 1, freq = 0;
- const u32 *pval;
-
- np_clock = of_find_matching_node(NULL, mpc512x_clock_ids);
- if (!np_clock) {
- dev_err(&ofdev->dev, "couldn't find clock node\n");
- return 0;
- }
- clockctl = of_iomap(np_clock, 0);
- if (!clockctl) {
- dev_err(&ofdev->dev, "couldn't map clock registers\n");
- goto exit_put;
- }
+ struct device_node *np;
+ u32 clockdiv;
+ enum {
+ CLK_FROM_AUTO,
+ CLK_FROM_IPS,
+ CLK_FROM_SYS,
+ CLK_FROM_REF,
+ } clk_from;
+ struct clk *clk_in, *clk_can;
+ unsigned long freq_calc;
+ struct mscan_priv *priv;
+ struct clk *clk_ipg;
- /* Determine the MSCAN device index from the peripheral's
- * physical address. Register address offsets against the
- * IMMR base are: 0x1300, 0x1380, 0x2300, 0x2380
+ /* the caller passed in the clock source spec that was read from
+ * the device tree, get the optional clock divider as well
*/
- pval = of_get_property(ofdev->dev.of_node, "reg", &plen);
- BUG_ON(!pval || plen < sizeof(*pval));
- clockidx = (*pval & 0x80) ? 1 : 0;
- if (*pval & 0x2000)
- clockidx += 2;
+ np = ofdev->dev.of_node;
+ clockdiv = 1;
+ of_property_read_u32(np, "fsl,mscan-clock-divider", &clockdiv);
+ dev_dbg(&ofdev->dev, "device tree specs: clk src[%s] div[%d]\n",
+ clock_source ? clock_source : "<NULL>", clockdiv);
+
+ /* when clock-source is 'ip', the CANCTL1[CLKSRC] bit needs to
+ * get set, and the 'ips' clock is the input to the MSCAN
+ * component
+ *
+ * for clock-source values of 'ref' or 'sys' the CANCTL1[CLKSRC]
+ * bit needs to get cleared, an optional clock-divider may have
+ * been specified (the default value is 1), the appropriate
+ * MSCAN related MCLK is the input to the MSCAN component
+ *
+ * in the absence of a clock-source spec, first an optimal clock
+ * gets determined based on the 'sys' clock, if that fails the
+ * 'ref' clock is used
+ */
+ clk_from = CLK_FROM_AUTO;
+ if (clock_source) {
+ /* interpret the device tree's spec for the clock source */
+ if (!strcmp(clock_source, "ip"))
+ clk_from = CLK_FROM_IPS;
+ else if (!strcmp(clock_source, "sys"))
+ clk_from = CLK_FROM_SYS;
+ else if (!strcmp(clock_source, "ref"))
+ clk_from = CLK_FROM_REF;
+ else
+ goto err_invalid;
+ dev_dbg(&ofdev->dev, "got a clk source spec[%d]\n", clk_from);
+ }
+ if (clk_from == CLK_FROM_AUTO) {
+ /* no spec so far, try the 'sys' clock; round to the
+ * next MHz and see if we can get a multiple of 16MHz
+ */
+ dev_dbg(&ofdev->dev, "no clk source spec, trying SYS\n");
+ clk_in = devm_clk_get(&ofdev->dev, "sys");
+ if (IS_ERR(clk_in))
+ goto err_notavail;
+ freq_calc = clk_get_rate(clk_in);
+ freq_calc += 499999;
+ freq_calc /= 1000000;
+ freq_calc *= 1000000;
+ if ((freq_calc % 16000000) == 0) {
+ clk_from = CLK_FROM_SYS;
+ clockdiv = freq_calc / 16000000;
+ dev_dbg(&ofdev->dev,
+ "clk fit, sys[%lu] div[%d] freq[%lu]\n",
+ freq_calc, clockdiv, freq_calc / clockdiv);
+ }
+ }
+ if (clk_from == CLK_FROM_AUTO) {
+ /* no spec so far, use the 'ref' clock */
+ dev_dbg(&ofdev->dev, "no clk source spec, trying REF\n");
+ clk_in = devm_clk_get(&ofdev->dev, "ref");
+ if (IS_ERR(clk_in))
+ goto err_notavail;
+ clk_from = CLK_FROM_REF;
+ freq_calc = clk_get_rate(clk_in);
+ dev_dbg(&ofdev->dev,
+ "clk fit, ref[%lu] (no div) freq[%lu]\n",
+ freq_calc, freq_calc);
+ }
- /*
- * Clock source and divider selection: 3 different clock sources
- * can be selected: "ip", "ref" or "sys". For the latter two, a
- * clock divider can be defined as well. If the clock source is
- * not specified by the device tree, we first try to find an
- * optimal CAN source clock based on the system clock. If that
- * is not posslible, the reference clock will be used.
+ /* select IPS or MCLK as the MSCAN input (returned to the caller),
+ * setup the MCLK mux source and rate if applicable, apply the
+ * optionally specified or derived above divider, and determine
+ * the actual resulting clock rate to return to the caller
*/
- if (clock_name && !strcmp(clock_name, "ip")) {
+ switch (clk_from) {
+ case CLK_FROM_IPS:
+ clk_can = devm_clk_get(&ofdev->dev, "ips");
+ if (IS_ERR(clk_can))
+ goto err_notavail;
+ priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
+ priv->clk_can = clk_can;
+ freq_calc = clk_get_rate(clk_can);
*mscan_clksrc = MSCAN_CLKSRC_IPS;
- freq = mpc5xxx_get_bus_frequency(ofdev->dev.of_node);
- } else {
+ dev_dbg(&ofdev->dev, "clk from IPS, clksrc[%d] freq[%lu]\n",
+ *mscan_clksrc, freq_calc);
+ break;
+ case CLK_FROM_SYS:
+ case CLK_FROM_REF:
+ clk_can = devm_clk_get(&ofdev->dev, "mclk");
+ if (IS_ERR(clk_can))
+ goto err_notavail;
+ priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
+ priv->clk_can = clk_can;
+ if (clk_from == CLK_FROM_SYS)
+ clk_in = devm_clk_get(&ofdev->dev, "sys");
+ if (clk_from == CLK_FROM_REF)
+ clk_in = devm_clk_get(&ofdev->dev, "ref");
+ if (IS_ERR(clk_in))
+ goto err_notavail;
+ clk_set_parent(clk_can, clk_in);
+ freq_calc = clk_get_rate(clk_in);
+ freq_calc /= clockdiv;
+ clk_set_rate(clk_can, freq_calc);
+ freq_calc = clk_get_rate(clk_can);
*mscan_clksrc = MSCAN_CLKSRC_BUS;
-
- pval = of_get_property(ofdev->dev.of_node,
- "fsl,mscan-clock-divider", &plen);
- if (pval && plen == sizeof(*pval))
- clockdiv = *pval;
- if (!clockdiv)
- clockdiv = 1;
-
- if (!clock_name || !strcmp(clock_name, "sys")) {
- sys_clk = devm_clk_get(&ofdev->dev, "sys_clk");
- if (IS_ERR(sys_clk)) {
- dev_err(&ofdev->dev, "couldn't get sys_clk\n");
- goto exit_unmap;
- }
- /* Get and round up/down sys clock rate */
- sys_freq = 1000000 *
- ((clk_get_rate(sys_clk) + 499999) / 1000000);
-
- if (!clock_name) {
- /* A multiple of 16 MHz would be optimal */
- if ((sys_freq % 16000000) == 0) {
- clocksrc = 0;
- clockdiv = sys_freq / 16000000;
- freq = sys_freq / clockdiv;
- }
- } else {
- clocksrc = 0;
- freq = sys_freq / clockdiv;
- }
- }
-
- if (clocksrc < 0) {
- ref_clk = devm_clk_get(&ofdev->dev, "ref_clk");
- if (IS_ERR(ref_clk)) {
- dev_err(&ofdev->dev, "couldn't get ref_clk\n");
- goto exit_unmap;
- }
- clocksrc = 1;
- freq = clk_get_rate(ref_clk) / clockdiv;
- }
+ dev_dbg(&ofdev->dev, "clk from MCLK, clksrc[%d] freq[%lu]\n",
+ *mscan_clksrc, freq_calc);
+ break;
+ default:
+ goto err_invalid;
}
- /* Disable clock */
- out_be32(&clockctl->mccr[clockidx], 0x0);
- if (clocksrc >= 0) {
- /* Set source and divider */
- val = (clocksrc << 14) | ((clockdiv - 1) << 17);
- out_be32(&clockctl->mccr[clockidx], val);
- /* Enable clock */
- out_be32(&clockctl->mccr[clockidx], val | 0x10000);
- }
+ /* the above clk_can item is used for the bitrate, access to
+ * the peripheral's register set needs the clk_ipg item
+ */
+ clk_ipg = devm_clk_get(&ofdev->dev, "ipg");
+ if (IS_ERR(clk_ipg))
+ goto err_notavail_ipg;
+ if (clk_prepare_enable(clk_ipg))
+ goto err_notavail_ipg;
+ priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
+ priv->clk_ipg = clk_ipg;
+
+ /* return the determined clock source rate */
+ return freq_calc;
+
+err_invalid:
+ dev_err(&ofdev->dev, "invalid clock source specification\n");
+ /* clock source rate could not get determined */
+ return 0;
- /* Enable MSCAN clock domain */
- val = in_be32(&clockctl->sccr[1]);
- if (!(val & (1 << 25)))
- out_be32(&clockctl->sccr[1], val | (1 << 25));
+err_notavail:
+ dev_err(&ofdev->dev, "cannot acquire or setup bitrate clock source\n");
+ /* clock source rate could not get determined */
+ return 0;
- dev_dbg(&ofdev->dev, "using '%s' with frequency divider %d\n",
- *mscan_clksrc == MSCAN_CLKSRC_IPS ? "ips_clk" :
- clocksrc == 1 ? "ref_clk" : "sys_clk", clockdiv);
+err_notavail_ipg:
+ dev_err(&ofdev->dev, "cannot acquire or setup register clock\n");
+ /* clock source rate could not get determined */
+ return 0;
+}
-exit_unmap:
- iounmap(clockctl);
-exit_put:
- of_node_put(np_clock);
- return freq;
+static void mpc512x_can_put_clock(struct platform_device *ofdev)
+{
+ struct mscan_priv *priv;
+
+ priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
+ if (priv->clk_ipg)
+ clk_disable_unprepare(priv->clk_ipg);
}
#else /* !CONFIG_PPC_MPC512x */
static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
{
return 0;
}
+#define mpc512x_can_put_clock NULL
#endif /* CONFIG_PPC_MPC512x */
static const struct of_device_id mpc5xxx_can_table[];
static const struct mpc5xxx_can_data mpc5200_can_data = {
.type = MSCAN_TYPE_MPC5200,
.get_clock = mpc52xx_can_get_clock,
+ /* .put_clock not applicable */
};
static const struct mpc5xxx_can_data mpc5121_can_data = {
.type = MSCAN_TYPE_MPC5121,
.get_clock = mpc512x_can_get_clock,
+ .put_clock = mpc512x_can_put_clock,
};
static const struct of_device_id mpc5xxx_can_table[] = {
unsigned int irq;
u8 bits_per_word;
struct clk *clk_mclk;
+ struct clk *clk_ipg;
u32 mclk_rate;
struct completion txisrdone;
struct spi_master *master;
int ret;
void *tempp;
- int psc_num;
- char clk_name[16];
struct clk *clk;
master = spi_alloc_master(dev, sizeof *mps);
goto free_master;
init_completion(&mps->txisrdone);
- psc_num = master->bus_num;
- snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
- clk = devm_clk_get(dev, clk_name);
+ clk = devm_clk_get(dev, "mclk");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto free_master;
mps->clk_mclk = clk;
mps->mclk_rate = clk_get_rate(clk);
+ clk = devm_clk_get(dev, "ipg");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto free_mclk_clock;
+ }
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ goto free_mclk_clock;
+ mps->clk_ipg = clk;
+
ret = mpc512x_psc_spi_port_config(master, mps);
if (ret < 0)
- goto free_clock;
+ goto free_ipg_clock;
ret = devm_spi_register_master(dev, master);
if (ret < 0)
- goto free_clock;
+ goto free_ipg_clock;
return ret;
-free_clock:
+free_ipg_clock:
+ clk_disable_unprepare(mps->clk_ipg);
+free_mclk_clock:
clk_disable_unprepare(mps->clk_mclk);
free_master:
spi_master_put(master);
struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
clk_disable_unprepare(mps->clk_mclk);
+ clk_disable_unprepare(mps->clk_ipg);
return 0;
}
static struct psc_fifoc __iomem *psc_fifoc;
static unsigned int psc_fifoc_irq;
+static struct clk *psc_fifoc_clk;
static void mpc512x_psc_fifo_init(struct uart_port *port)
{
/* Init PSC FIFO Controller */
static int __init mpc512x_psc_fifoc_init(void)
{
+ int err;
struct device_node *np;
+ struct clk *clk;
+
+ /* default error code, potentially overwritten by clock calls */
+ err = -ENODEV;
np = of_find_compatible_node(NULL, NULL,
"fsl,mpc5121-psc-fifo");
if (!np) {
pr_err("%s: Can't find FIFOC node\n", __func__);
- return -ENODEV;
+ goto out_err;
}
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ /* backwards compat with device trees that lack clock specs */
+ clk = clk_get_sys(np->name, "ipg");
+ }
+ if (IS_ERR(clk)) {
+ pr_err("%s: Can't lookup FIFO clock\n", __func__);
+ err = PTR_ERR(clk);
+ goto out_ofnode_put;
+ }
+ if (clk_prepare_enable(clk)) {
+ pr_err("%s: Can't enable FIFO clock\n", __func__);
+ clk_put(clk);
+ goto out_ofnode_put;
+ }
+ psc_fifoc_clk = clk;
+
psc_fifoc = of_iomap(np, 0);
if (!psc_fifoc) {
pr_err("%s: Can't map FIFOC\n", __func__);
- of_node_put(np);
- return -ENODEV;
+ goto out_clk_disable;
}
psc_fifoc_irq = irq_of_parse_and_map(np, 0);
- of_node_put(np);
if (psc_fifoc_irq == 0) {
pr_err("%s: Can't get FIFOC irq\n", __func__);
- iounmap(psc_fifoc);
- return -ENODEV;
+ goto out_unmap;
}
+ of_node_put(np);
return 0;
+
+out_unmap:
+ iounmap(psc_fifoc);
+out_clk_disable:
+ clk_disable_unprepare(psc_fifoc_clk);
+ clk_put(psc_fifoc_clk);
+out_ofnode_put:
+ of_node_put(np);
+out_err:
+ return err;
}
static void __exit mpc512x_psc_fifoc_uninit(void)
{
iounmap(psc_fifoc);
+
+ /* disable the clock, errors are not fatal */
+ if (psc_fifoc_clk) {
+ clk_disable_unprepare(psc_fifoc_clk);
+ clk_put(psc_fifoc_clk);
+ psc_fifoc_clk = NULL;
+ }
}
/* 512x specific interrupt handler. The caller holds the port lock */
}
static struct clk *psc_mclk_clk[MPC52xx_PSC_MAXNUM];
+static struct clk *psc_ipg_clk[MPC52xx_PSC_MAXNUM];
/* called from within the .request_port() callback (allocation) */
static int mpc512x_psc_alloc_clock(struct uart_port *port)
{
int psc_num;
- char clk_name[16];
struct clk *clk;
int err;
psc_num = (port->mapbase & 0xf00) >> 8;
- snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
- clk = devm_clk_get(port->dev, clk_name);
+
+ clk = devm_clk_get(port->dev, "mclk");
if (IS_ERR(clk)) {
dev_err(port->dev, "Failed to get MCLK!\n");
- return PTR_ERR(clk);
+ err = PTR_ERR(clk);
+ goto out_err;
}
err = clk_prepare_enable(clk);
if (err) {
dev_err(port->dev, "Failed to enable MCLK!\n");
- return err;
+ goto out_err;
}
psc_mclk_clk[psc_num] = clk;
+
+ clk = devm_clk_get(port->dev, "ipg");
+ if (IS_ERR(clk)) {
+ dev_err(port->dev, "Failed to get IPG clock!\n");
+ err = PTR_ERR(clk);
+ goto out_err;
+ }
+ err = clk_prepare_enable(clk);
+ if (err) {
+ dev_err(port->dev, "Failed to enable IPG clock!\n");
+ goto out_err;
+ }
+ psc_ipg_clk[psc_num] = clk;
+
return 0;
+
+out_err:
+ if (psc_mclk_clk[psc_num]) {
+ clk_disable_unprepare(psc_mclk_clk[psc_num]);
+ psc_mclk_clk[psc_num] = NULL;
+ }
+ if (psc_ipg_clk[psc_num]) {
+ clk_disable_unprepare(psc_ipg_clk[psc_num]);
+ psc_ipg_clk[psc_num] = NULL;
+ }
+ return err;
}
/* called from within the .release_port() callback (release) */
clk_disable_unprepare(clk);
psc_mclk_clk[psc_num] = NULL;
}
+ if (psc_ipg_clk[psc_num]) {
+ clk_disable_unprepare(psc_ipg_clk[psc_num]);
+ psc_ipg_clk[psc_num] = NULL;
+ }
}
/* implementation of the .clock() callback (enable/disable) */
struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct clk *clk;
int err;
- char clk_name[10];
- int base, clk_num;
-
- base = pdev->resource->start & 0xf000;
- if (base == 0x3000)
- clk_num = 1;
- else if (base == 0x4000)
- clk_num = 2;
- else
- return -ENODEV;
- snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
- clk = devm_clk_get(pdev->dev.parent, clk_name);
+ clk = devm_clk_get(pdev->dev.parent, "ipg");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clk\n");
return PTR_ERR(clk);
--- /dev/null
+/*
+ * This header provides constants for MPC512x clock specs in DT bindings.
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_MPC512x_CLOCK_H
+#define _DT_BINDINGS_CLOCK_MPC512x_CLOCK_H
+
+#define MPC512x_CLK_DUMMY 0
+#define MPC512x_CLK_REF 1
+#define MPC512x_CLK_SYS 2
+#define MPC512x_CLK_DIU 3
+#define MPC512x_CLK_VIU 4
+#define MPC512x_CLK_CSB 5
+#define MPC512x_CLK_E300 6
+#define MPC512x_CLK_IPS 7
+#define MPC512x_CLK_FEC 8
+#define MPC512x_CLK_SATA 9
+#define MPC512x_CLK_PATA 10
+#define MPC512x_CLK_NFC 11
+#define MPC512x_CLK_LPC 12
+#define MPC512x_CLK_MBX_BUS 13
+#define MPC512x_CLK_MBX 14
+#define MPC512x_CLK_MBX_3D 15
+#define MPC512x_CLK_AXE 16
+#define MPC512x_CLK_USB1 17
+#define MPC512x_CLK_USB2 18
+#define MPC512x_CLK_I2C 19
+#define MPC512x_CLK_MSCAN0_MCLK 20
+#define MPC512x_CLK_MSCAN1_MCLK 21
+#define MPC512x_CLK_MSCAN2_MCLK 22
+#define MPC512x_CLK_MSCAN3_MCLK 23
+#define MPC512x_CLK_BDLC 24
+#define MPC512x_CLK_SDHC 25
+#define MPC512x_CLK_PCI 26
+#define MPC512x_CLK_PSC_MCLK_IN 27
+#define MPC512x_CLK_SPDIF_TX 28
+#define MPC512x_CLK_SPDIF_RX 29
+#define MPC512x_CLK_SPDIF_MCLK 30
+#define MPC512x_CLK_SPDIF 31
+#define MPC512x_CLK_AC97 32
+#define MPC512x_CLK_PSC0_MCLK 33
+#define MPC512x_CLK_PSC1_MCLK 34
+#define MPC512x_CLK_PSC2_MCLK 35
+#define MPC512x_CLK_PSC3_MCLK 36
+#define MPC512x_CLK_PSC4_MCLK 37
+#define MPC512x_CLK_PSC5_MCLK 38
+#define MPC512x_CLK_PSC6_MCLK 39
+#define MPC512x_CLK_PSC7_MCLK 40
+#define MPC512x_CLK_PSC8_MCLK 41
+#define MPC512x_CLK_PSC9_MCLK 42
+#define MPC512x_CLK_PSC10_MCLK 43
+#define MPC512x_CLK_PSC11_MCLK 44
+#define MPC512x_CLK_PSC_FIFO 45
+#define MPC512x_CLK_PSC0 46
+#define MPC512x_CLK_PSC1 47
+#define MPC512x_CLK_PSC2 48
+#define MPC512x_CLK_PSC3 49
+#define MPC512x_CLK_PSC4 50
+#define MPC512x_CLK_PSC5 51
+#define MPC512x_CLK_PSC6 52
+#define MPC512x_CLK_PSC7 53
+#define MPC512x_CLK_PSC8 54
+#define MPC512x_CLK_PSC9 55
+#define MPC512x_CLK_PSC10 56
+#define MPC512x_CLK_PSC11 57
+#define MPC512x_CLK_SDHC2 58
+#define MPC512x_CLK_FEC2 59
+#define MPC512x_CLK_OUT0_CLK 60
+#define MPC512x_CLK_OUT1_CLK 61
+#define MPC512x_CLK_OUT2_CLK 62
+#define MPC512x_CLK_OUT3_CLK 63
+#define MPC512x_CLK_CAN_CLK_IN 64
+
+#define MPC512x_CLK_LAST_PUBLIC 64
+
+#endif
* for improved portability across platforms
*/
+#if IS_ENABLED(CONFIG_PPC)
+
+static inline u32 clk_readl(u32 __iomem *reg)
+{
+ return ioread32be(reg);
+}
+
+static inline void clk_writel(u32 val, u32 __iomem *reg)
+{
+ iowrite32be(val, reg);
+}
+
+#else /* platform dependent I/O accessors */
+
static inline u32 clk_readl(u32 __iomem *reg)
{
return readl(reg);
writel(val, reg);
}
+#endif /* platform dependent I/O accessors */
+
#endif /* CONFIG_COMMON_CLK */
#endif /* CLK_PROVIDER_H */
projects / ~andy / linux / commitdiff