regulator: max77686: Configure enable time to properly handle regulator enable

The enable time for buck regulators was not configured but actually is
essential: consumers, like usb3503, doing hard reset (regulator off/on)
should wait for the regulator to settle.

Configure the enable time according to datasheet.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
index d1ab6a4da88fa5c9965f4e914eae10ba518b9acd..ac4fa581e0a5eaa60f1afd4179778883d3919561 100644 (file)
--- a/drivers/regulator/max77686-regulator.c
+++ b/drivers/regulator/max77686-regulator.c
@@ -41,6 +41,8 @@
 #define MAX77686_LDO_LOW_UVSTEP        25000
 #define MAX77686_BUCK_MINUV    750000
 #define MAX77686_BUCK_UVSTEP   50000
+#define MAX77686_BUCK_ENABLE_TIME      40              /* us */
+#define MAX77686_DVS_ENABLE_TIME       22              /* us */
 #define MAX77686_RAMP_DELAY    100000                  /* uV/us */
 #define MAX77686_DVS_RAMP_DELAY        27500                   /* uV/us */
 #define MAX77686_DVS_MINUV     600000
@@ -422,6 +424,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
        .min_uV         = MAX77686_BUCK_MINUV,                          \
        .uV_step        = MAX77686_BUCK_UVSTEP,                         \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
+       .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
@@ -439,6 +442,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
        .min_uV         = MAX77686_BUCK_MINUV,                          \
        .uV_step        = MAX77686_BUCK_UVSTEP,                         \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
+       .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
@@ -456,6 +460,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
        .min_uV         = MAX77686_DVS_MINUV,                           \
        .uV_step        = MAX77686_DVS_UVSTEP,                          \
        .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
+       .enable_time    = MAX77686_DVS_ENABLE_TIME,                     \
        .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
        .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
        .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \