drivers/regulator/sy8824x.c

Source file repositories/reference/linux-study-clean/drivers/regulator/sy8824x.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/sy8824x.c
Extension
.c
Size
6092 bytes
Lines
238
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 sy8824_config {
	/* registers */
	unsigned int vol_reg;
	unsigned int mode_reg;
	unsigned int enable_reg;
	/* Voltage range and step(linear) */
	unsigned int vsel_min;
	unsigned int vsel_step;
	unsigned int vsel_count;
	const struct regmap_config *config;
};

struct sy8824_device_info {
	struct device *dev;
	struct regulator_desc desc;
	struct regulator_init_data *regulator;
	const struct sy8824_config *cfg;
};

static int sy8824_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct sy8824_device_info *di = rdev_get_drvdata(rdev);
	const struct sy8824_config *cfg = di->cfg;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		regmap_update_bits(rdev->regmap, cfg->mode_reg,
				   SY8824C_MODE, SY8824C_MODE);
		break;
	case REGULATOR_MODE_NORMAL:
		regmap_update_bits(rdev->regmap, cfg->mode_reg,
				   SY8824C_MODE, 0);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static unsigned int sy8824_get_mode(struct regulator_dev *rdev)
{
	struct sy8824_device_info *di = rdev_get_drvdata(rdev);
	const struct sy8824_config *cfg = di->cfg;
	u32 val;
	int ret = 0;

	ret = regmap_read(rdev->regmap, cfg->mode_reg, &val);
	if (ret < 0)
		return ret;
	if (val & SY8824C_MODE)
		return REGULATOR_MODE_FAST;
	else
		return REGULATOR_MODE_NORMAL;
}

static const struct regulator_ops sy8824_regulator_ops = {
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.map_voltage = regulator_map_voltage_linear,
	.list_voltage = regulator_list_voltage_linear,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_mode = sy8824_set_mode,
	.get_mode = sy8824_get_mode,
};

static int sy8824_regulator_register(struct sy8824_device_info *di,
			struct regulator_config *config)
{
	struct regulator_desc *rdesc = &di->desc;
	const struct sy8824_config *cfg = di->cfg;
	struct regulator_dev *rdev;

	rdesc->name = "sy8824-reg";
	rdesc->supply_name = "vin";
	rdesc->ops = &sy8824_regulator_ops;
	rdesc->type = REGULATOR_VOLTAGE;
	rdesc->n_voltages = cfg->vsel_count;
	rdesc->enable_reg = cfg->enable_reg;
	rdesc->enable_mask = SY8824C_BUCK_EN;
	rdesc->min_uV = cfg->vsel_min;
	rdesc->uV_step = cfg->vsel_step;
	rdesc->vsel_reg = cfg->vol_reg;
	rdesc->vsel_mask = cfg->vsel_count - 1;
	rdesc->owner = THIS_MODULE;

	rdev = devm_regulator_register(di->dev, &di->desc, config);
	return PTR_ERR_OR_ZERO(rdev);

Annotation

Implementation Notes