--- /dev/null
+Binding for TI/National Semiconductor LP872x Driver
+
+Required properties:
+ - compatible: "ti,lp8720" or "ti,lp8725"
+ - reg: I2C slave address. 0x7d = LP8720, 0x7a = LP8725
+
+Optional properties:
+ - ti,general-config: the value of LP872X_GENERAL_CFG register (u8)
+ (LP8720)
+ bit[2]: BUCK output voltage control by external DVS pin or register
+ 1 = external pin, 0 = bit7 of register 08h
+ bit[1]: sleep control by external DVS pin or register
+ 1 = external pin, 0 = bit6 of register 08h
+ bit[0]: time step unit(usec). 1 = 25, 0 = 50
+
+ (LP8725)
+ bit[7:6]: time step unit(usec). 00 = 32, 01 = 64, 10 = 128, 11 = 256
+ bit[4]: BUCK2 enable control. 1 = enable, 0 = disable
+ bit[3]: BUCK2 output voltage register address. 1 = 0Ah, 0 = 0Bh
+ bit[2]: BUCK1 output voltage control by external DVS pin or register
+ 1 = register 08h, 0 = DVS
+ bit[1]: LDO sleep control. 1 = sleep mode, 0 = normal
+ bit[0]: BUCK1 enable control, 1 = enable, 0 = disable
+
+ For more details, please see the datasheet.
+
+ - ti,update-config: define it when LP872X_GENERAL_CFG register should be set
+ - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
+ - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
+ - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
+
+ Sub nodes for regulator_init_data
+ LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck)
+ LP8725 has maximum 9 nodes. (child name: ldo1 ~ 5, lilo1,2 and buck1,2)
+ For more details, please see the following binding document.
+ (Documentation/devicetree/bindings/regulator/regulator.txt)
+
+Datasheet
+ - LP8720: http://www.ti.com/lit/ds/symlink/lp8720.pdf
+ - LP8725: http://www.ti.com/lit/ds/symlink/lp8725.pdf
+
+Example 1) LP8720
+
+lp8720@7d {
+ compatible = "ti,lp8720";
+ reg = <0x7d>;
+
+ /* external DVS pin used, timestep is 25usec */
+ ti,general-config = /bits/ 8 <0x03>;
+ ti,update-config;
+
+ /*
+ * The dvs-gpio depends on the processor environment.
+ * For example, following GPIO specifier means GPIO134 in OMAP4.
+ */
+ ti,dvs-gpio = <&gpio5 6 0>;
+ ti,dvs-vsel = /bits/ 8 <1>; /* SEL_V2 */
+ ti,dvs-state = /bits/ 8 <1>; /* DVS_HIGH */
+
+ vaf: ldo1 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vmmc: ldo2 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcam_io: ldo3 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ };
+
+ vcam_core: ldo4 {
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <2850000>;
+ regulator-boot-on;
+ };
+
+ vcam: ldo5 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcc: buck {
+ regulator-name = "VBUCK";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <2300000>;
+ };
+};
+
+Example 2) LP8725
+
+lp8725@7a {
+ compatible = "ti,lp8725";
+ reg = <0x7a>;
+
+ /* Enable BUCK1,2, no DVS, normal LDO mode, timestep is 256usec */
+ ti,general-config = /bits/ 8 <0xdd>;
+ ti,update-config;
+
+ vcam_io: ldo1 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcam_core: ldo2 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcam: ldo3 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcmmb_io: ldo4 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ };
+
+ vcmmb_core: ldo5 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ };
+
+ vaux1: lilo1 {
+ regulator-name = "VAUX1";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vaux2: lilo2 {
+ regulator-name = "VAUX2";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ vcc1: buck1 {
+ regulator-name = "VBUCK1";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-min-microamp = <460000>;
+ regulator-max-microamp = <1370000>;
+ regulator-boot-on;
+ };
+
+ vcc2: buck2 {
+ regulator-name = "VBUCK2";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-min-microamp = <460000>;
+ regulator-max-microamp = <1370000>;
+ regulator-boot-on;
+ };
+};
#include <linux/regulator/lp872x.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/of_regulator.h>
/* Registers : LP8720/8725 shared */
#define LP872X_GENERAL_CFG 0x00
gpio = dvs->gpio;
if (!gpio_is_valid(gpio)) {
- dev_err(lp->dev, "invalid gpio: %d\n", gpio);
- return -EINVAL;
+ dev_warn(lp->dev, "invalid gpio: %d\n", gpio);
+ goto set_default_dvs_mode;
}
pinstate = dvs->init_state;
.max_register = MAX_REGISTERS,
};
+#ifdef CONFIG_OF
+
+#define LP872X_VALID_OPMODE (REGULATOR_MODE_FAST | REGULATOR_MODE_NORMAL)
+
+static struct of_regulator_match lp8720_matches[] = {
+ { .name = "ldo1", .driver_data = (void *)LP8720_ID_LDO1, },
+ { .name = "ldo2", .driver_data = (void *)LP8720_ID_LDO2, },
+ { .name = "ldo3", .driver_data = (void *)LP8720_ID_LDO3, },
+ { .name = "ldo4", .driver_data = (void *)LP8720_ID_LDO4, },
+ { .name = "ldo5", .driver_data = (void *)LP8720_ID_LDO5, },
+ { .name = "buck", .driver_data = (void *)LP8720_ID_BUCK, },
+};
+
+static struct of_regulator_match lp8725_matches[] = {
+ { .name = "ldo1", .driver_data = (void *)LP8725_ID_LDO1, },
+ { .name = "ldo2", .driver_data = (void *)LP8725_ID_LDO2, },
+ { .name = "ldo3", .driver_data = (void *)LP8725_ID_LDO3, },
+ { .name = "ldo4", .driver_data = (void *)LP8725_ID_LDO4, },
+ { .name = "ldo5", .driver_data = (void *)LP8725_ID_LDO5, },
+ { .name = "lilo1", .driver_data = (void *)LP8725_ID_LILO1, },
+ { .name = "lilo2", .driver_data = (void *)LP8725_ID_LILO2, },
+ { .name = "buck1", .driver_data = (void *)LP8725_ID_BUCK1, },
+ { .name = "buck2", .driver_data = (void *)LP8725_ID_BUCK2, },
+};
+
+static struct lp872x_platform_data
+*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
+{
+ struct device_node *np = dev->of_node;
+ struct lp872x_platform_data *pdata;
+ struct of_regulator_match *match;
+ struct regulator_init_data *d;
+ int num_matches;
+ int count;
+ int i;
+ u8 dvs_state;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ goto out;
+
+ of_property_read_u8(np, "ti,general-config", &pdata->general_config);
+ if (of_find_property(np, "ti,update-config", NULL))
+ pdata->update_config = true;
+
+ pdata->dvs = devm_kzalloc(dev, sizeof(struct lp872x_dvs), GFP_KERNEL);
+ if (!pdata->dvs)
+ goto out;
+
+ pdata->dvs->gpio = of_get_named_gpio(np, "ti,dvs-gpio", 0);
+ of_property_read_u8(np, "ti,dvs-vsel", (u8 *)&pdata->dvs->vsel);
+ of_property_read_u8(np, "ti,dvs-state", &dvs_state);
+ pdata->dvs->init_state = dvs_state ? DVS_HIGH : DVS_LOW;
+
+ if (of_get_child_count(np) == 0)
+ goto out;
+
+ switch (which) {
+ case LP8720:
+ match = lp8720_matches;
+ num_matches = ARRAY_SIZE(lp8720_matches);
+ break;
+ case LP8725:
+ match = lp8725_matches;
+ num_matches = ARRAY_SIZE(lp8725_matches);
+ break;
+ default:
+ goto out;
+ }
+
+ count = of_regulator_match(dev, np, match, num_matches);
+ if (count <= 0)
+ goto out;
+
+ for (i = 0; i < num_matches; i++) {
+ pdata->regulator_data[i].id = (int)match[i].driver_data;
+ pdata->regulator_data[i].init_data = match[i].init_data;
+
+ /* Operation mode configuration for buck/buck1/buck2 */
+ if (strncmp(match[i].name, "buck", 4))
+ continue;
+
+ d = pdata->regulator_data[i].init_data;
+ d->constraints.valid_modes_mask |= LP872X_VALID_OPMODE;
+ d->constraints.valid_ops_mask |= REGULATOR_CHANGE_MODE;
+ }
+out:
+ return pdata;
+}
+#else
+static struct lp872x_platform_data
+*lp872x_populate_pdata_from_dt(struct device *dev, enum lp872x_id which)
+{
+ return NULL;
+}
+#endif
+
static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct lp872x *lp;
[LP8725] = LP8725_NUM_REGULATORS,
};
+ if (cl->dev.of_node)
+ cl->dev.platform_data = lp872x_populate_pdata_from_dt(&cl->dev,
+ (enum lp872x_id)id->driver_data);
+
lp = devm_kzalloc(&cl->dev, sizeof(struct lp872x), GFP_KERNEL);
if (!lp)
goto err_mem;
return 0;
}
+static const struct of_device_id lp872x_dt_ids[] = {
+ { .compatible = "ti,lp8720", },
+ { .compatible = "ti,lp8725", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lp872x_dt_ids);
+
static const struct i2c_device_id lp872x_ids[] = {
{"lp8720", LP8720},
{"lp8725", LP8725},
.driver = {
.name = "lp872x",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(lp872x_dt_ids),
},
.probe = lp872x_probe,
.remove = lp872x_remove,
projects / ~andy / linux / commitdiff