Invalid buck4 configuration for linear mapping of voltage in S2MPS14
regulators caused boot failure on Gear 2 (dw_mmc-exynos):
[ 3.569137] EXT4-fs (mmcblk0p15): mounted filesystem with ordered data mode. Opts: (null)
[ 3.571716] VFS: Mounted root (ext4 filesystem) readonly on device 179:15.
[ 3.629842] mmcblk0: error -110 sending status command, retrying
[ 3.630244] mmcblk0: error -110 sending status command, retrying
[ 3.636292] mmcblk0: error -110 sending status command, aborting
Buck4 voltage regulator has different minimal voltage value than other
bucks. Commit merging multiple regulator description macros caused to
use linear_min_sel from buck[1235] regulators as value for buck4. This
lead to lower voltage of buck4 than required.
Output of the buck4 is used internally as power source for
LDO{3,4,7,11,19,20,21,23}. On Gear 2 board LDO11 is used as MMC
regulator (V_EMMC_1.8V).
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Fixes: 5a867cf28893 ("regulator: s2mps11: Optimize the regulator description macro")
Cc: <stable@xxxxxxxxxxxxxxx>
---
Changes since v1:
1. Extend patch description and trim dmesg log.
2. Justify indentation for carried-over regulator_desc_s2mps14_buck argument.
---
drivers/regulator/s2mps11.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index c1444c3d84c2..2809ae0d6bcd 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -570,7 +570,7 @@ static struct regulator_ops s2mps14_reg_ops = {
.enable_mask = S2MPS14_ENABLE_MASK \
}
-#define regulator_desc_s2mps14_buck(num, min, step) { \
+#define regulator_desc_s2mps14_buck(num, min, step, min_sel) { \
.name = "BUCK"#num, \
.id = S2MPS14_BUCK##num, \
.ops = &s2mps14_reg_ops, \
@@ -579,7 +579,7 @@ static struct regulator_ops s2mps14_reg_ops = {
.min_uV = min, \
.uV_step = step, \
.n_voltages = S2MPS14_BUCK_N_VOLTAGES, \
- .linear_min_sel = S2MPS14_BUCK1235_START_SEL, \
+ .linear_min_sel = min_sel, \
.ramp_delay = S2MPS14_BUCK_RAMP_DELAY, \
.vsel_reg = S2MPS14_REG_B1CTRL2 + (num - 1) * 2, \
.vsel_mask = S2MPS14_BUCK_VSEL_MASK, \
@@ -613,11 +613,16 @@ static const struct regulator_desc s2mps14_regulators[] = {
regulator_desc_s2mps14_ldo(23, MIN_800_MV, STEP_25_MV),
regulator_desc_s2mps14_ldo(24, MIN_1800_MV, STEP_25_MV),
regulator_desc_s2mps14_ldo(25, MIN_1800_MV, STEP_25_MV),
- regulator_desc_s2mps14_buck(1, MIN_600_MV, STEP_6_25_MV),
- regulator_desc_s2mps14_buck(2, MIN_600_MV, STEP_6_25_MV),
- regulator_desc_s2mps14_buck(3, MIN_600_MV, STEP_6_25_MV),
- regulator_desc_s2mps14_buck(4, MIN_1400_MV, STEP_12_5_MV),
- regulator_desc_s2mps14_buck(5, MIN_600_MV, STEP_6_25_MV),
+ regulator_desc_s2mps14_buck(1, MIN_600_MV, STEP_6_25_MV,
+ S2MPS14_BUCK1235_START_SEL),
+ regulator_desc_s2mps14_buck(2, MIN_600_MV, STEP_6_25_MV,
+ S2MPS14_BUCK1235_START_SEL),
+ regulator_desc_s2mps14_buck(3, MIN_600_MV, STEP_6_25_MV,
+ S2MPS14_BUCK1235_START_SEL),
+ regulator_desc_s2mps14_buck(4, MIN_1400_MV, STEP_12_5_MV,
+ S2MPS14_BUCK4_START_SEL),
+ regulator_desc_s2mps14_buck(5, MIN_600_MV, STEP_6_25_MV,
+ S2MPS14_BUCK1235_START_SEL),
};
static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
--
1.9.1
--
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