[6/8] regulator: mp8859: Support status and error readback
Commit Message
The MP8859 can report if it is in regulation and detect over temperature
conditions, report this information via the relevant regulator API
calls.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/regulator/mp8859.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
@@ -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[] = {