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regulator enable and disable sysfs control

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This commit is contained in:
August 2018-08-14 21:17:14 +08:00
parent b4d28f2e73
commit 5d37c72c64
1 changed files with 55 additions and 1 deletions
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56
lichee/linux-4.9/drivers/regulator/core.c Normal file → Executable file
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@ -99,6 +99,7 @@ struct regulator_supply_alias {
};
static int _regulator_is_enabled(struct regulator_dev *rdev);
static int _regulator_enable(struct regulator_dev *rdev);
static int _regulator_disable(struct regulator_dev *rdev);
static int _regulator_get_voltage(struct regulator_dev *rdev);
static int _regulator_get_current_limit(struct regulator_dev *rdev);
@ -915,6 +916,59 @@ static ssize_t regulator_print_state(char *buf, int state)
return sprintf(buf, "unknown\n");
}
static ssize_t regulator_state_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
int ret = 0;
#if 1
if (sysfs_streq(buf, "enable")) {
pr_info("enable regulator %s\n", rdev_get_name(rdev));
mutex_lock(&rdev->mutex);
ret = _regulator_enable(rdev);
mutex_unlock(&rdev->mutex);
if (ret != 0) {
pr_err("enable failed\n");
return ret;
}
}
else if(sysfs_streq(buf, "disable")) {
if (_regulator_is_enabled(rdev) > 0) {
pr_info("disable regulator %s\n", rdev_get_name(rdev));
mutex_lock(&rdev->mutex);
ret = _regulator_disable(rdev);
mutex_unlock(&rdev->mutex);
if (ret != 0) {
pr_err("disable failed\n");
return ret;
}
}
else {
pr_info("regulator already disabled");
}
}
#else
if (sysfs_streq(buf, "enable")) {
ret = regulator_enable(rdev->supply);
if(ret)
pr_info("enable regulator %s failed\n", rdev_get_name(rdev));
}
else if(sysfs_streq(buf, "disable")) {
ret = regulator_disable(rdev->supply);
if(ret)
pr_info("diable regulator %s failed\n", rdev_get_name(rdev));
}
#endif
return count;
}
static ssize_t regulator_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -927,7 +981,7 @@ static ssize_t regulator_state_show(struct device *dev,
return ret;
}
static DEVICE_ATTR(state, 0444, regulator_state_show, NULL);
static DEVICE_ATTR(state, 0664, regulator_state_show, regulator_state_store);
static ssize_t regulator_status_show(struct device *dev,
struct device_attribute *attr, char *buf)