drivers/regulator/rtq6752-regulator.c

Source file repositories/reference/linux-study-clean/drivers/regulator/rtq6752-regulator.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/rtq6752-regulator.c
Extension
.c
Size
7748 bytes
Lines
291
Domain
Driver Families
Bucket
drivers/regulator
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct rtq6752_priv {
	struct regmap *regmap;
	struct gpio_desc *enable_gpio;
	struct mutex lock;
	unsigned char enable_flag;
};

static int rtq6752_set_vdd_enable(struct regulator_dev *rdev)
{
	struct rtq6752_priv *priv = rdev_get_drvdata(rdev);
	int rid = rdev_get_id(rdev), ret;

	mutex_lock(&priv->lock);
	if (!priv->enable_flag) {
		if (priv->enable_gpio) {
			gpiod_set_value(priv->enable_gpio, 1);

			usleep_range(RTQ6752_I2CRDY_TIMEUS,
				     RTQ6752_I2CRDY_TIMEUS + 100);
		}

		regcache_cache_only(priv->regmap, false);
		ret = regcache_sync(priv->regmap);
		if (ret) {
			mutex_unlock(&priv->lock);
			return ret;
		}
	}

	priv->enable_flag |= BIT(rid);
	mutex_unlock(&priv->lock);

	return regulator_enable_regmap(rdev);
}

static int rtq6752_set_vdd_disable(struct regulator_dev *rdev)
{
	struct rtq6752_priv *priv = rdev_get_drvdata(rdev);
	int rid = rdev_get_id(rdev), ret;

	ret = regulator_disable_regmap(rdev);
	if (ret)
		return ret;

	mutex_lock(&priv->lock);
	priv->enable_flag &= ~BIT(rid);

	if (!priv->enable_flag) {
		regcache_cache_only(priv->regmap, true);
		regcache_mark_dirty(priv->regmap);

		if (priv->enable_gpio)
			gpiod_set_value(priv->enable_gpio, 0);

	}
	mutex_unlock(&priv->lock);

	return 0;
}

static int rtq6752_get_error_flags(struct regulator_dev *rdev,
				   unsigned int *flags)
{
	unsigned int val, events = 0;
	static const unsigned int fault_mask[] = {
		RTQ6752_PAVDDF_MASK, RTQ6752_NAVDDF_MASK };
	int rid = rdev_get_id(rdev), ret;

	ret = regmap_read(rdev->regmap, RTQ6752_REG_FAULT, &val);
	if (ret)
		return ret;

	if (val & fault_mask[rid])
		events = REGULATOR_ERROR_REGULATION_OUT;

	*flags = events;
	return 0;
}

static const struct regulator_ops rtq6752_regulator_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.enable = rtq6752_set_vdd_enable,
	.disable = rtq6752_set_vdd_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.set_active_discharge = regulator_set_active_discharge_regmap,
	.get_error_flags = rtq6752_get_error_flags,
};

Annotation

Implementation Notes