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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: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/r/20240225-regulator-mp8859-v1-6-68ee2c839ded@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2024-02-25 14:59:32 +00:00
parent d7217c91bb
commit 4317ecadbe
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 59 additions and 0 deletions
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59
drivers/regulator/mp8859.c
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@ -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[] = {