drivers/regulator/rtq2134-regulator.c

Source file repositories/reference/linux-study-clean/drivers/regulator/rtq2134-regulator.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/rtq2134-regulator.c
Extension
.c
Size
10880 bytes
Lines
376
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 rtq2134_regulator_desc {
	struct regulator_desc desc;
	/* Extension for proprietary register and mask */
	unsigned int mode_reg;
	unsigned int mode_mask;
	unsigned int suspend_enable_reg;
	unsigned int suspend_enable_mask;
	unsigned int suspend_vsel_reg;
	unsigned int suspend_vsel_mask;
	unsigned int suspend_mode_reg;
	unsigned int suspend_mode_mask;
	unsigned int dvs_ctrl_reg;
};

static int rtq2134_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;
	unsigned int val;

	if (mode == REGULATOR_MODE_NORMAL)
		val = RTQ2134_AUTO_MODE;
	else if (mode == REGULATOR_MODE_FAST)
		val = RTQ2134_FCCM_MODE;
	else
		return -EINVAL;

	val <<= ffs(desc->mode_mask) - 1;
	return regmap_update_bits(rdev->regmap, desc->mode_reg, desc->mode_mask,
				  val);
}

static unsigned int rtq2134_buck_get_mode(struct regulator_dev *rdev)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;
	unsigned int mode;
	int ret;

	ret = regmap_read(rdev->regmap, desc->mode_reg, &mode);
	if (ret)
		return ret;

	if (mode & desc->mode_mask)
		return REGULATOR_MODE_FAST;
	return REGULATOR_MODE_NORMAL;
}

static int rtq2134_buck_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;
	int sel;

	sel = regulator_map_voltage_linear_range(rdev, uV, uV);
	if (sel < 0)
		return sel;

	sel <<= ffs(desc->suspend_vsel_mask) - 1;

	return regmap_update_bits(rdev->regmap, desc->suspend_vsel_reg,
				  desc->suspend_vsel_mask, sel);
}

static int rtq2134_buck_set_suspend_enable(struct regulator_dev *rdev)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;
	unsigned int val = desc->suspend_enable_mask;

	return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,
				  desc->suspend_enable_mask, val);
}

static int rtq2134_buck_set_suspend_disable(struct regulator_dev *rdev)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;

	return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,
				  desc->suspend_enable_mask, 0);
}

static int rtq2134_buck_set_suspend_mode(struct regulator_dev *rdev,
					 unsigned int mode)
{
	struct rtq2134_regulator_desc *desc =
		(struct rtq2134_regulator_desc *)rdev->desc;
	unsigned int val;

Annotation

Implementation Notes