Unverified Commit 4317ecad authored by Mark Brown's avatar Mark Brown
Browse files

regulator: mp8859: Support status and error readback 



The MP8859 can report if it is in regulation and detect over temperature
conditions, report this information via the relevant regulator API
calls.

Tested-by: default avatarMarkus Reichl <m.reichl@fivetechno.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://msgid.link/r/20240225-regulator-mp8859-v1-6-68ee2c839ded@kernel.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d7217c91

drivers/regulator/mp8859.c

+59 −0
Original line number Diff line number Diff line
@@ -39,6 +39,11 @@ 
#define MP8859_DISCHG_EN_MASK		0x10

#define MP8859_MODE_MASK		0x08



#define MP8859_PG_MASK			0x80

#define MP8859_OTP_MASK			0x40

#define MP8859_OTW_MASK			0x20

#define MP8859_CC_CV_MASK		0x10



static int mp8859_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)

{

	int ret;
@@ -112,6 +117,58 @@ static int mp8859_set_mode(struct regulator_dev *rdev, unsigned int mode) 
				  MP8859_MODE_MASK, val);

}



static int mp8859_get_status(struct regulator_dev *rdev)

{

	unsigned int val;

	int ret;



	/* Output status is only meaingful when enabled */

	ret = regmap_read(rdev->regmap, MP8859_CTL1_REG, &val);

	if (ret != 0)

		return ret;

	if (!(val & MP8859_ENABLE_MASK))

		return REGULATOR_STATUS_UNDEFINED;



	ret = regmap_read(rdev->regmap, MP8859_STATUS_REG, &val);

	if (ret != 0)

		return ret;



	if (val & MP8859_PG_MASK)

		return REGULATOR_STATUS_ON;

	else

		return REGULATOR_STATUS_ERROR;

}



static int mp8859_get_error_flags(struct regulator_dev *rdev,

				  unsigned int *flags)

{

	unsigned int status, enabled;

	int ret;



	*flags = 0;



	/* Output status is only meaingful when enabled */

	ret = regmap_read(rdev->regmap, MP8859_CTL1_REG, &enabled);

	if (ret != 0)

		return ret;

	enabled &= MP8859_ENABLE_MASK;



	ret = regmap_read(rdev->regmap, MP8859_STATUS_REG, &status);

	if (ret != 0)

		return ret;



	if (enabled && !(status & MP8859_PG_MASK))

		status |= REGULATOR_ERROR_FAIL;

	if (status & MP8859_OTP_MASK)

		status |= REGULATOR_ERROR_OVER_TEMP;

	if (status & MP8859_OTW_MASK)

		status |= REGULATOR_ERROR_OVER_TEMP_WARN;

	if (status & MP8859_CC_CV_MASK)

		status |= REGULATOR_ERROR_OVER_CURRENT;



	return 0;

}



static const struct linear_range mp8859_dcdc_ranges[] = {

	REGULATOR_LINEAR_RANGE(0, VOL_MIN_IDX, VOL_MAX_IDX, 10000),

};
@@ -169,6 +226,8 @@ static const struct regulator_ops mp8859_ops = { 
	.set_mode = mp8859_set_mode,

	.get_mode = mp8859_get_mode,

	.set_active_discharge = regulator_set_active_discharge_regmap,

	.get_status = mp8859_get_status,

	.get_error_flags = mp8859_get_error_flags,

};



static const struct regulator_desc mp8859_regulators[] = {