drivers/regulator/db8500-prcmu.c

Source file repositories/reference/linux-study-clean/drivers/regulator/db8500-prcmu.c

File Facts

System
Linux kernel
Corpus path
drivers/regulator/db8500-prcmu.c
Extension
.c
Size
12221 bytes
Lines
502
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

if (!epod_on[epod_id]) {
			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
			if (ret < 0)
				return ret;
		}
		epod_ramret[epod_id] = true;
	} else {
		ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
		if (ret < 0)
			return ret;
		epod_on[epod_id] = true;
	}

	return 0;
}

static int disable_epod(u16 epod_id, bool ramret)
{
	int ret;

	if (ramret) {
		if (!epod_on[epod_id]) {
			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
			if (ret < 0)
				return ret;
		}
		epod_ramret[epod_id] = false;
	} else {
		if (epod_ramret[epod_id]) {
			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
			if (ret < 0)
				return ret;
		} else {
			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
			if (ret < 0)
				return ret;
		}
		epod_on[epod_id] = false;
	}

	return 0;
}

/*
 * Regulator switch
 */
static int db8500_regulator_switch_enable(struct regulator_dev *rdev)
{
	struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
	int ret;

	if (info == NULL)
		return -EINVAL;

	dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-enable\n",
		info->desc.name);

	ret = enable_epod(info->epod_id, info->is_ramret);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
			"regulator-switch-%s-enable: prcmu call failed\n",
			info->desc.name);
		goto out;
	}

	info->is_enabled = true;
out:
	return ret;
}

static int db8500_regulator_switch_disable(struct regulator_dev *rdev)
{
	struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
	int ret;

	if (info == NULL)
		return -EINVAL;

	dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-disable\n",
		info->desc.name);

	ret = disable_epod(info->epod_id, info->is_ramret);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev),
			"regulator_switch-%s-disable: prcmu call failed\n",
			info->desc.name);
		goto out;
	}

	info->is_enabled = false;

Annotation

Implementation Notes