diff options
| -rw-r--r-- | Documentation/devicetree/bindings/regulator/max8973-regulator.txt | 21 | ||||
| -rw-r--r-- | drivers/regulator/max8973-regulator.c | 37 |
2 files changed, 46 insertions, 12 deletions
diff --git a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt new file mode 100644 index 000000000000..8d38ab2acac5 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt @@ -0,0 +1,21 @@ +* Maxim MAX8973 Voltage Regulator + +Required properties: + +- compatible: must be "maxium,max8973" +- reg: the i2c slave address of the regulator. It should be 0x1b. + +Any standard regulator properties can be used to configure the single max8973 +DCDC. + +Example: + + max8973@1b { + compatible = "maxium,max8973"; + reg = <0x1b>; + + regulator-min-microvolt = <935000>; + regulator-max-microvolt = <1200000>; + regulator-boot-on; + regulator-always-on; + }; diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c index b2dbdd70cab1..0c5195a842e2 100644 --- a/drivers/regulator/max8973-regulator.c +++ b/drivers/regulator/max8973-regulator.c @@ -26,10 +26,12 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/max8973-regulator.h> +#include <linux/regulator/of_regulator.h> #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/slab.h> @@ -370,7 +372,8 @@ static int max8973_probe(struct i2c_client *client, int ret; pdata = client->dev.platform_data; - if (!pdata) { + + if (!pdata && !client->dev.of_node) { dev_err(&client->dev, "No Platform data"); return -EIO; } @@ -400,7 +403,7 @@ static int max8973_probe(struct i2c_client *client, max->desc.uV_step = MAX8973_VOLATGE_STEP; max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE; - if (!pdata->enable_ext_control) { + if (!pdata || !pdata->enable_ext_control) { max->desc.enable_reg = MAX8973_VOUT; max->desc.enable_mask = MAX8973_VOUT_ENABLE; max->ops.enable = regulator_enable_regmap; @@ -408,12 +411,17 @@ static int max8973_probe(struct i2c_client *client, max->ops.is_enabled = regulator_is_enabled_regmap; } - max->enable_external_control = pdata->enable_ext_control; - max->dvs_gpio = pdata->dvs_gpio; - max->curr_gpio_val = pdata->dvs_def_state; - max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state; + if (pdata) { + max->dvs_gpio = pdata->dvs_gpio; + max->enable_external_control = pdata->enable_ext_control; + max->curr_gpio_val = pdata->dvs_def_state; + max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state; + } else { + max->dvs_gpio = -EINVAL; + max->curr_vout_reg = MAX8973_VOUT; + } + max->lru_index[0] = max->curr_vout_reg; - max->valid_dvs_gpio = false; if (gpio_is_valid(max->dvs_gpio)) { int gpio_flags; @@ -439,16 +447,21 @@ static int max8973_probe(struct i2c_client *client, max->lru_index[i] = i; max->lru_index[0] = max->curr_vout_reg; max->lru_index[max->curr_vout_reg] = 0; + } else { + max->valid_dvs_gpio = false; } - ret = max8973_init_dcdc(max, pdata); - if (ret < 0) { - dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret); - return ret; + if (pdata) { + ret = max8973_init_dcdc(max, pdata); + if (ret < 0) { + dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret); + return ret; + } } config.dev = &client->dev; - config.init_data = pdata->reg_init_data; + config.init_data = pdata ? pdata->reg_init_data : + of_get_regulator_init_data(&client->dev, client->dev.of_node); config.driver_data = max; config.of_node = client->dev.of_node; config.regmap = max->regmap; |