regulator: rk808: Set the enable time for LDOs

The LDOs are documented in the rk808 datasheet to have a soft start
time of 400us.  Add that to the driver.  If this time takes longer on
a certain board the device tree should be able to override with
"regulator-enable-ramp-delay".

This fixes some dw_mmc probing problems (together with other patches
posted to the mmc maiing lists) on rk3288.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
index c94a3e0..3f67228 100644 (file)
--- a/drivers/regulator/rk808-regulator.c
+++ b/drivers/regulator/rk808-regulator.c
@@ -235,6 +235,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(0),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG2",
@@ -249,6 +250,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(1),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG3",
@@ -263,6 +265,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_BUCK4_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(2),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG4",
@@ -277,6 +280,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(3),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG5",
@@ -291,6 +295,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(4),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG6",
@@ -305,6 +310,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(5),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG7",
@@ -319,6 +325,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(6),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "LDO_REG8",
@@ -333,6 +340,7 @@ static const struct regulator_desc rk808_reg[] = {
                .vsel_mask = RK808_LDO_VSEL_MASK,
                .enable_reg = RK808_LDO_EN_REG,
                .enable_mask = BIT(7),
+               .enable_time = 400,
                .owner = THIS_MODULE,
        }, {
                .name = "SWITCH_REG1",