Pileus Git - ~andy/linux/blob - arch/arm/mach-s5pv210/cpu.c

   1 /* linux/arch/arm/mach-s5pv210/cpu.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9 */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/timer.h>
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <linux/sysdev.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include <asm/proc-fns.h>
  28 #include <mach/map.h>
  29 #include <mach/regs-clock.h>
  30
  31 #include <plat/cpu.h>
  32 #include <plat/devs.h>
  33 #include <plat/clock.h>
  34 #include <plat/s5pv210.h>
  35 #include <plat/iic-core.h>
  36
  37 /* Initial IO mappings */
  38
  39 static struct map_desc s5pv210_iodesc[] __initdata = {
  40         {
  41                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  42                 .pfn            = __phys_to_pfn(S5PV210_PA_SYSTIMER),
  43                 .length         = SZ_1M,
  44                 .type           = MT_DEVICE,
  45         }, {
  46                 .virtual        = (unsigned long)VA_VIC2,
  47                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC2),
  48                 .length         = SZ_16K,
  49                 .type           = MT_DEVICE,
  50         }, {
  51                 .virtual        = (unsigned long)VA_VIC3,
  52                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC3),
  53                 .length         = SZ_16K,
  54                 .type           = MT_DEVICE,
  55         }, {
  56                 .virtual        = (unsigned long)S5P_VA_SROMC,
  57                 .pfn            = __phys_to_pfn(S5PV210_PA_SROMC),
  58                 .length         = SZ_4K,
  59                 .type           = MT_DEVICE,
  60         }
  61 };
  62
  63 static void s5pv210_idle(void)
  64 {
  65         if (!need_resched())
  66                 cpu_do_idle();
  67
  68         local_irq_enable();
  69 }
  70
  71 /* s5pv210_map_io
  72  *
  73  * register the standard cpu IO areas
  74 */
  75
  76 void __init s5pv210_map_io(void)
  77 {
  78         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
  79
  80         /* the i2c devices are directly compatible with s3c2440 */
  81         s3c_i2c0_setname("s3c2440-i2c");
  82         s3c_i2c1_setname("s3c2440-i2c");
  83         s3c_i2c2_setname("s3c2440-i2c");
  84 }
  85
  86 void __init s5pv210_init_clocks(int xtal)
  87 {
  88         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
  89
  90         s3c24xx_register_baseclocks(xtal);
  91         s5p_register_clocks(xtal);
  92         s5pv210_register_clocks();
  93         s5pv210_setup_clocks();
  94 }
  95
  96 void __init s5pv210_init_irq(void)
  97 {
  98         u32 vic[4];     /* S5PV210 supports 4 VIC */
  99
 100         /* All the VICs are fully populated. */
 101         vic[0] = ~0;
 102         vic[1] = ~0;
 103         vic[2] = ~0;
 104         vic[3] = ~0;
 105
 106         s5p_init_irq(vic, ARRAY_SIZE(vic));
 107 }
 108
 109 struct sysdev_class s5pv210_sysclass = {
 110         .name   = "s5pv210-core",
 111 };
 112
 113 static struct sys_device s5pv210_sysdev = {
 114         .cls    = &s5pv210_sysclass,
 115 };
 116
 117 static int __init s5pv210_core_init(void)
 118 {
 119         return sysdev_class_register(&s5pv210_sysclass);
 120 }
 121
 122 core_initcall(s5pv210_core_init);
 123
 124 int __init s5pv210_init(void)
 125 {
 126         printk(KERN_INFO "S5PV210: Initializing architecture\n");
 127
 128         /* set idle function */
 129         pm_idle = s5pv210_idle;
 130
 131         return sysdev_register(&s5pv210_sysdev);
 132 }