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regulator: gpio-regulator: Use core GPIO enable support 

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-07-04 10:20:46 +08:00 committed by Mark Brown
parent a2a8222be8
commit 4b7c948f55
1 changed files with 16 additions and 87 deletions
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103
drivers/regulator/gpio-regulator.c
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@ -36,10 +36,6 @@ struct gpio_regulator_data {
struct regulator_desc desc; struct regulator_desc desc;
struct regulator_dev *dev; struct regulator_dev *dev;
int enable_gpio;
bool enable_high;
bool is_enabled;
struct gpio *gpios; struct gpio *gpios;
int nr_gpios; int nr_gpios;
@ -49,37 +45,6 @@ struct gpio_regulator_data {
int state; int state;
}; };
static int gpio_regulator_is_enabled(struct regulator_dev *dev)
{
struct gpio_regulator_data *data = rdev_get_drvdata(dev);
return data->is_enabled;
}
static int gpio_regulator_enable(struct regulator_dev *dev)
{
struct gpio_regulator_data *data = rdev_get_drvdata(dev);
if (gpio_is_valid(data->enable_gpio)) {
gpio_set_value_cansleep(data->enable_gpio, data->enable_high);
data->is_enabled = true;
}
return 0;
}
static int gpio_regulator_disable(struct regulator_dev *dev)
{
struct gpio_regulator_data *data = rdev_get_drvdata(dev);
if (gpio_is_valid(data->enable_gpio)) {
gpio_set_value_cansleep(data->enable_gpio, !data->enable_high);
data->is_enabled = false;
}
return 0;
}
static int gpio_regulator_get_value(struct regulator_dev *dev) static int gpio_regulator_get_value(struct regulator_dev *dev)
{ {
struct gpio_regulator_data *data = rdev_get_drvdata(dev); struct gpio_regulator_data *data = rdev_get_drvdata(dev);
@ -145,18 +110,12 @@ static int gpio_regulator_set_current_limit(struct regulator_dev *dev,
} }
static struct regulator_ops gpio_regulator_voltage_ops = { static struct regulator_ops gpio_regulator_voltage_ops = {
.is_enabled = gpio_regulator_is_enabled,
.enable = gpio_regulator_enable,
.disable = gpio_regulator_disable,
.get_voltage = gpio_regulator_get_value, .get_voltage = gpio_regulator_get_value,
.set_voltage = gpio_regulator_set_voltage, .set_voltage = gpio_regulator_set_voltage,
.list_voltage = gpio_regulator_list_voltage, .list_voltage = gpio_regulator_list_voltage,
}; };
static struct regulator_ops gpio_regulator_current_ops = { static struct regulator_ops gpio_regulator_current_ops = {
.is_enabled = gpio_regulator_is_enabled,
.enable = gpio_regulator_enable,
.disable = gpio_regulator_disable,
.get_current_limit = gpio_regulator_get_value, .get_current_limit = gpio_regulator_get_value,
.set_current_limit = gpio_regulator_set_current_limit, .set_current_limit = gpio_regulator_set_current_limit,
}; };
@ -223,51 +182,12 @@ static int __devinit gpio_regulator_probe(struct platform_device *pdev)
break; break;
} }
drvdata->enable_gpio = config->enable_gpio;
if (gpio_is_valid(config->enable_gpio)) {
drvdata->enable_high = config->enable_high;
ret = gpio_request(config->enable_gpio, config->supply_name);
if (ret) {
dev_err(&pdev->dev,
"Could not obtain regulator enable GPIO %d: %d\n",
config->enable_gpio, ret);
goto err_memstate;
}
/* set output direction without changing state
* to prevent glitch
*/
if (config->enabled_at_boot) {
drvdata->is_enabled = true;
ret = gpio_direction_output(config->enable_gpio,
config->enable_high);
} else {
drvdata->is_enabled = false;
ret = gpio_direction_output(config->enable_gpio,
!config->enable_high);
}
if (ret) {
dev_err(&pdev->dev,
"Could not configure regulator enable GPIO %d direction: %d\n",
config->enable_gpio, ret);
goto err_enablegpio;
}
} else {
/* Regulator without GPIO control is considered
* always enabled
*/
drvdata->is_enabled = true;
}
drvdata->nr_gpios = config->nr_gpios; drvdata->nr_gpios = config->nr_gpios;
ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios); ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios);
if (ret) { if (ret) {
dev_err(&pdev->dev, dev_err(&pdev->dev,
"Could not obtain regulator setting GPIOs: %d\n", ret); "Could not obtain regulator setting GPIOs: %d\n", ret);
goto err_enablegpio; goto err_memstate;
} }
/* build initial state from gpio init data. */ /* build initial state from gpio init data. */
@ -282,6 +202,21 @@ static int __devinit gpio_regulator_probe(struct platform_device *pdev)
cfg.init_data = config->init_data; cfg.init_data = config->init_data;
cfg.driver_data = drvdata; cfg.driver_data = drvdata;
if (config->enable_gpio >= 0)
cfg.ena_gpio = config->enable_gpio;
cfg.ena_gpio_invert = !config->enable_high;
if (config->enabled_at_boot) {
if (config->enable_high)
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
else
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
} else {
if (config->enable_high)
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
else
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
}
drvdata->dev = regulator_register(&drvdata->desc, &cfg); drvdata->dev = regulator_register(&drvdata->desc, &cfg);
if (IS_ERR(drvdata->dev)) { if (IS_ERR(drvdata->dev)) {
ret = PTR_ERR(drvdata->dev); ret = PTR_ERR(drvdata->dev);
@ -295,9 +230,6 @@ static int __devinit gpio_regulator_probe(struct platform_device *pdev)
err_stategpio: err_stategpio:
gpio_free_array(drvdata->gpios, drvdata->nr_gpios); gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
err_enablegpio:
if (gpio_is_valid(config->enable_gpio))
gpio_free(config->enable_gpio);
err_memstate: err_memstate:
kfree(drvdata->states); kfree(drvdata->states);
err_memgpio: err_memgpio:
@ -319,9 +251,6 @@ static int __devexit gpio_regulator_remove(struct platform_device *pdev)
kfree(drvdata->states); kfree(drvdata->states);
kfree(drvdata->gpios); kfree(drvdata->gpios);
if (gpio_is_valid(drvdata->enable_gpio))
gpio_free(drvdata->enable_gpio);
kfree(drvdata->desc.name); kfree(drvdata->desc.name);
return 0; return 0;