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Code

regulator: fixed: Use core GPIO enable support

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This is essentially the code that was factored out into the core when the
feature was implemented.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-06-27 14:30:33 +01:00
parent 65f735082d
commit 25a53dfbfb
1 changed files with 17 additions and 87 deletions
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104
drivers/regulator/fixed.c
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@ -35,9 +35,6 @@ struct fixed_voltage_data {
struct regulator_desc desc; struct regulator_desc desc;
struct regulator_dev *dev; struct regulator_dev *dev;
int microvolts; int microvolts;
int gpio;
bool enable_high;
bool is_enabled;
}; };
@ -108,33 +105,6 @@ of_get_fixed_voltage_config(struct device *dev)
return config; return config;
} }
static int fixed_voltage_is_enabled(struct regulator_dev *dev)
{
struct fixed_voltage_data *data = rdev_get_drvdata(dev);
return data->is_enabled;
}
static int fixed_voltage_enable(struct regulator_dev *dev)
{
struct fixed_voltage_data *data = rdev_get_drvdata(dev);
gpio_set_value_cansleep(data->gpio, data->enable_high);
data->is_enabled = true;
return 0;
}
static int fixed_voltage_disable(struct regulator_dev *dev)
{
struct fixed_voltage_data *data = rdev_get_drvdata(dev);
gpio_set_value_cansleep(data->gpio, !data->enable_high);
data->is_enabled = false;
return 0;
}
static int fixed_voltage_get_voltage(struct regulator_dev *dev) static int fixed_voltage_get_voltage(struct regulator_dev *dev)
{ {
struct fixed_voltage_data *data = rdev_get_drvdata(dev); struct fixed_voltage_data *data = rdev_get_drvdata(dev);
@ -156,14 +126,6 @@ static int fixed_voltage_list_voltage(struct regulator_dev *dev,
return data->microvolts; return data->microvolts;
} }
static struct regulator_ops fixed_voltage_gpio_ops = {
.is_enabled = fixed_voltage_is_enabled,
.enable = fixed_voltage_enable,
.disable = fixed_voltage_disable,
.get_voltage = fixed_voltage_get_voltage,
.list_voltage = fixed_voltage_list_voltage,
};
static struct regulator_ops fixed_voltage_ops = { static struct regulator_ops fixed_voltage_ops = {
.get_voltage = fixed_voltage_get_voltage, .get_voltage = fixed_voltage_get_voltage,
.list_voltage = fixed_voltage_list_voltage, .list_voltage = fixed_voltage_list_voltage,
@ -203,6 +165,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
} }
drvdata->desc.type = REGULATOR_VOLTAGE; drvdata->desc.type = REGULATOR_VOLTAGE;
drvdata->desc.owner = THIS_MODULE; drvdata->desc.owner = THIS_MODULE;
drvdata->desc.ops = &fixed_voltage_ops;
drvdata->desc.enable_time = config->startup_delay; drvdata->desc.enable_time = config->startup_delay;
@ -210,53 +173,25 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
drvdata->desc.n_voltages = 1; drvdata->desc.n_voltages = 1;
drvdata->microvolts = config->microvolts; drvdata->microvolts = config->microvolts;
drvdata->gpio = config->gpio;
if (gpio_is_valid(config->gpio)) { if (config->gpio >= 0)
int gpio_flag; cfg.ena_gpio = config->gpio;
drvdata->enable_high = config->enable_high; cfg.ena_gpio_invert = !config->enable_high;
if (config->enabled_at_boot) {
/* FIXME: Remove below print warning if (config->enable_high) {
* cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
* config->gpio must be set to -EINVAL by platform code if } else {
* GPIO control is not required. However, early adopters cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
* not requiring GPIO control may forget to initialize
* config->gpio to -EINVAL. This will cause GPIO 0 to be used
* for GPIO control.
*
* This warning will be removed once there are a couple of users
* for this driver.
*/
if (!config->gpio)
dev_warn(&pdev->dev,
"using GPIO 0 for regulator enable control\n");
/*
* set output direction without changing state
* to prevent glitch
*/
drvdata->is_enabled = config->enabled_at_boot;
ret = drvdata->is_enabled ?
config->enable_high : !config->enable_high;
gpio_flag = ret ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
if (config->gpio_is_open_drain)
gpio_flag |= GPIOF_OPEN_DRAIN;
ret = gpio_request_one(config->gpio, gpio_flag,
config->supply_name);
if (ret) {
dev_err(&pdev->dev,
"Could not obtain regulator enable GPIO %d: %d\n",
config->gpio, ret);
goto err_name;
} }
drvdata->desc.ops = &fixed_voltage_gpio_ops;
} else { } else {
drvdata->desc.ops = &fixed_voltage_ops; if (config->enable_high) {
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
} else {
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
}
} }
if (config->gpio_is_open_drain)
cfg.ena_gpio_flags |= GPIOF_OPEN_DRAIN;
cfg.dev = &pdev->dev; cfg.dev = &pdev->dev;
cfg.init_data = config->init_data; cfg.init_data = config->init_data;
@ -267,7 +202,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
if (IS_ERR(drvdata->dev)) { if (IS_ERR(drvdata->dev)) {
ret = PTR_ERR(drvdata->dev); ret = PTR_ERR(drvdata->dev);
dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret); dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
goto err_gpio; goto err_name;
} }
platform_set_drvdata(pdev, drvdata); platform_set_drvdata(pdev, drvdata);
@ -277,9 +212,6 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
return 0; return 0;
err_gpio:
if (gpio_is_valid(config->gpio))
gpio_free(config->gpio);
err_name: err_name:
kfree(drvdata->desc.name); kfree(drvdata->desc.name);
err: err:
@ -291,8 +223,6 @@ static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev)
struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev); struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev);
regulator_unregister(drvdata->dev); regulator_unregister(drvdata->dev);
if (gpio_is_valid(drvdata->gpio))
gpio_free(drvdata->gpio);
kfree(drvdata->desc.name); kfree(drvdata->desc.name);
return 0; return 0;