diff options
Diffstat (limited to 'drivers/regulator/lp872x.c')
| -rw-r--r-- | drivers/regulator/lp872x.c | 116 |
1 files changed, 114 insertions, 2 deletions
diff --git a/drivers/regulator/lp872x.c b/drivers/regulator/lp872x.c index f5fc4a142cdf..b16336bcd4d4 100644 --- a/drivers/regulator/lp872x.c +++ b/drivers/regulator/lp872x.c @@ -18,6 +18,9 @@ #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 @@ -723,8 +726,8 @@ static int lp872x_init_dvs(struct lp872x *lp) 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; @@ -829,6 +832,103 @@ static const struct regmap_config lp872x_regmap_config = { .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; @@ -838,6 +938,10 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id) [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; @@ -882,6 +986,13 @@ static int lp872x_remove(struct i2c_client *cl) 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}, @@ -893,6 +1004,7 @@ static struct i2c_driver lp872x_driver = { .driver = { .name = "lp872x", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(lp872x_dt_ids), }, .probe = lp872x_probe, .remove = lp872x_remove, |