diff options
| -rw-r--r-- | drivers/regulator/fixed.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 988a7472c2ab..a43b0e8a438d 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -30,6 +30,9 @@ #include <linux/of_gpio.h> #include <linux/regulator/of_regulator.h> #include <linux/regulator/machine.h> +#include <linux/acpi.h> +#include <linux/property.h> +#include <linux/gpio/consumer.h> struct fixed_voltage_data { struct regulator_desc desc; @@ -94,6 +97,44 @@ of_get_fixed_voltage_config(struct device *dev, return config; } +/** + * acpi_get_fixed_voltage_config - extract fixed_voltage_config structure info + * @dev: device requesting for fixed_voltage_config + * @desc: regulator description + * + * Populates fixed_voltage_config structure by extracting data through ACPI + * interface, returns a pointer to the populated structure of NULL if memory + * alloc fails. + */ +static struct fixed_voltage_config * +acpi_get_fixed_voltage_config(struct device *dev, + const struct regulator_desc *desc) +{ + struct fixed_voltage_config *config; + const char *supply_name; + struct gpio_desc *gpiod; + int ret; + + config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL); + if (!config) + return ERR_PTR(-ENOMEM); + + ret = device_property_read_string(dev, "supply-name", &supply_name); + if (!ret) + config->supply_name = supply_name; + + gpiod = gpiod_get(dev, "gpio", GPIOD_ASIS); + if (IS_ERR(gpiod)) + return ERR_PTR(-ENODEV); + + config->gpio = desc_to_gpio(gpiod); + config->enable_high = device_property_read_bool(dev, + "enable-active-high"); + gpiod_put(gpiod); + + return config; +} + static struct regulator_ops fixed_voltage_ops = { }; @@ -114,6 +155,11 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev) &drvdata->desc); if (IS_ERR(config)) return PTR_ERR(config); + } else if (ACPI_HANDLE(&pdev->dev)) { + config = acpi_get_fixed_voltage_config(&pdev->dev, + &drvdata->desc); + if (IS_ERR(config)) + return PTR_ERR(config); } else { config = dev_get_platdata(&pdev->dev); } |