drivers/regulator/wm8994-regulator.c

Source file repositories/reference/linux-study-clean/drivers/regulator/wm8994-regulator.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/wm8994-regulator.c
Extension
.c
Size
6030 bytes
Lines
241
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 wm8994_ldo {
	struct regulator_dev *regulator;
	struct wm8994 *wm8994;
	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

#define WM8994_LDO1_MAX_SELECTOR 0x7
#define WM8994_LDO2_MAX_SELECTOR 0x3

static const struct regulator_ops wm8994_ldo1_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
				    unsigned int selector)
{
	struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);

	if (selector > WM8994_LDO2_MAX_SELECTOR)
		return -EINVAL;

	switch (ldo->wm8994->type) {
	case WM8994:
		return (selector * 100000) + 900000;
	case WM8958:
		return (selector * 100000) + 1000000;
	case WM1811:
		switch (selector) {
		case 0:
			return -EINVAL;
		default:
			return (selector * 100000) + 950000;
		}
		break;
	default:
		return -EINVAL;
	}
}

static const struct regulator_ops wm8994_ldo2_ops = {
	.list_voltage = wm8994_ldo2_list_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc wm8994_ldo_desc[] = {
	{
		.name = "LDO1",
		.id = 1,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_1,
		.vsel_mask = WM8994_LDO1_VSEL_MASK,
		.ops = &wm8994_ldo1_ops,
		.min_uV = 2400000,
		.uV_step = 100000,
		.enable_time = 3000,
		.off_on_delay = 36000,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO2",
		.id = 2,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_2,
		.vsel_mask = WM8994_LDO2_VSEL_MASK,
		.ops = &wm8994_ldo2_ops,
		.enable_time = 3000,
		.off_on_delay = 36000,
		.owner = THIS_MODULE,
	},
};

static const struct regulator_desc wm8958_ldo_desc[] = {
	{
		.name = "LDO1",
		.id = 1,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_1,
		.vsel_mask = WM8994_LDO1_VSEL_MASK,
		.ops = &wm8994_ldo1_ops,
		.min_uV = 2400000,
		.uV_step = 100000,
		.enable_time = 3000,

Annotation

Implementation Notes