drivers/regulator/mtk-dvfsrc-regulator.c

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

File Facts

System
Linux kernel
Corpus path
drivers/regulator/mtk-dvfsrc-regulator.c
Extension
.c
Size
5900 bytes
Lines
235
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 dvfsrc_regulator_pdata {
	const struct regulator_desc *descs;
	u32 size;
};

#define MTK_DVFSRC_VREG(match, _name, _volt_table)	\
{							\
	.name = match,					\
	.of_match = match,				\
	.ops = &dvfsrc_vcore_ops,			\
	.type = REGULATOR_VOLTAGE,			\
	.id = DVFSRC_ID_##_name,			\
	.owner = THIS_MODULE,				\
	.n_voltages = ARRAY_SIZE(_volt_table),		\
	.volt_table = _volt_table,			\
}

static inline struct device *to_dvfs_regulator_dev(struct regulator_dev *rdev)
{
	return rdev_get_dev(rdev)->parent;
}

static inline struct device *to_dvfsrc_dev(struct regulator_dev *rdev)
{
	return to_dvfs_regulator_dev(rdev)->parent;
}

static int dvfsrc_get_cmd(int rdev_id, enum mtk_dvfsrc_cmd *cmd)
{
	switch (rdev_id) {
	case DVFSRC_ID_VCORE:
		*cmd = MTK_DVFSRC_CMD_VCORE_LEVEL;
		break;
	case DVFSRC_ID_VSCP:
		*cmd = MTK_DVFSRC_CMD_VSCP_LEVEL;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int dvfsrc_set_voltage_sel(struct regulator_dev *rdev,
				  unsigned int selector)
{
	struct device *dvfsrc_dev = to_dvfsrc_dev(rdev);
	enum mtk_dvfsrc_cmd req_cmd;
	int id = rdev_get_id(rdev);
	int ret;

	ret = dvfsrc_get_cmd(id, &req_cmd);
	if (ret)
		return ret;

	return mtk_dvfsrc_send_request(dvfsrc_dev, req_cmd, selector);
}

static int dvfsrc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct device *dvfsrc_dev = to_dvfsrc_dev(rdev);
	enum mtk_dvfsrc_cmd query_cmd;
	int id = rdev_get_id(rdev);
	int val, ret;

	ret = dvfsrc_get_cmd(id, &query_cmd);
	if (ret)
		return ret;

	ret = mtk_dvfsrc_query_info(dvfsrc_dev, query_cmd, &val);
	if (ret)
		return ret;

	return val;
}

static const struct regulator_ops dvfsrc_vcore_ops = {
	.list_voltage = regulator_list_voltage_table,
	.get_voltage_sel = dvfsrc_get_voltage_sel,
	.set_voltage_sel = dvfsrc_set_voltage_sel,
};

static const unsigned int mt6873_voltages[] = {
	575000,
	600000,
	650000,
	725000,
};

static const struct regulator_desc mt6873_regulators[] = {

Annotation

Implementation Notes