drivers/power/reset/atc260x-poweroff.c

Source file repositories/reference/linux-study-clean/drivers/power/reset/atc260x-poweroff.c

File Facts

System
Linux kernel
Corpus path
drivers/power/reset/atc260x-poweroff.c
Extension
.c
Size
6518 bytes
Lines
248
Domain
Driver Families
Bucket
drivers/power
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 atc260x_pwrc {
	struct device *dev;
	struct regmap *regmap;
	int (*do_poweroff)(const struct atc260x_pwrc *pwrc, bool restart);
};

static int atc2603c_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart)
{
	int ret, deep_sleep = 0;
	uint reg_mask, reg_val;

	/* S4-Deep Sleep Mode is NOT available for WALL/USB power */
	if (!restart && !power_supply_is_system_supplied()) {
		deep_sleep = 1;
		dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode");
	}

	/* Update wakeup sources */
	reg_val = ATC2603C_PMU_SYS_CTL0_ONOFF_LONG_WK_EN |
		  (restart ? ATC2603C_PMU_SYS_CTL0_RESET_WK_EN
			   : ATC2603C_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN);

	ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL0,
				 ATC2603C_PMU_SYS_CTL0_WK_ALL, reg_val);
	if (ret)
		dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);

	/* Update power mode */
	reg_mask = ATC2603C_PMU_SYS_CTL3_EN_S2 | ATC2603C_PMU_SYS_CTL3_EN_S3;

	ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL3, reg_mask,
				 deep_sleep ? 0 : ATC2603C_PMU_SYS_CTL3_EN_S3);
	if (ret) {
		dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret);
		return ret;
	}

	/* Trigger poweroff / restart sequence */
	reg_mask = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN
			   : ATC2603C_PMU_SYS_CTL1_EN_S1;
	reg_val = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN : 0;

	ret = regmap_update_bits(pwrc->regmap,
				 restart ? ATC2603C_PMU_SYS_CTL0 : ATC2603C_PMU_SYS_CTL1,
				 reg_mask, reg_val);
	if (ret) {
		dev_err(pwrc->dev, "failed to write SYS_CTL%d: %d\n",
			restart ? 0 : 1, ret);
		return ret;
	}

	/* Wait for trigger completion */
	mdelay(200);

	return 0;
}

static int atc2609a_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart)
{
	int ret, deep_sleep = 0;
	uint reg_mask, reg_val;

	/* S4-Deep Sleep Mode is NOT available for WALL/USB power */
	if (!restart && !power_supply_is_system_supplied()) {
		deep_sleep = 1;
		dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode");
	}

	/* Update wakeup sources */
	reg_val = ATC2609A_PMU_SYS_CTL0_ONOFF_LONG_WK_EN |
		  (restart ? ATC2609A_PMU_SYS_CTL0_RESET_WK_EN
			   : ATC2609A_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN);

	ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL0,
				 ATC2609A_PMU_SYS_CTL0_WK_ALL, reg_val);
	if (ret)
		dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);

	/* Update power mode */
	reg_mask = ATC2609A_PMU_SYS_CTL3_EN_S2 | ATC2609A_PMU_SYS_CTL3_EN_S3;

	ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL3, reg_mask,
				 deep_sleep ? 0 : ATC2609A_PMU_SYS_CTL3_EN_S3);
	if (ret) {
		dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret);
		return ret;
	}

	/* Trigger poweroff / restart sequence */
	reg_mask = restart ? ATC2609A_PMU_SYS_CTL0_RESTART_EN

Annotation

Implementation Notes