[added to the 3.18 stable tree] regulator: rk808: Set the enable time for LDOs

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From: Doug Anderson <dianders@xxxxxxxxxxxx>

This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.

===============

[ Upstream commit 28249b0c2fa361cdac450a6f40242ed45408a24f ]

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@xxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
 drivers/regulator/rk808-regulator.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
index 196a5c8..b019956 100644
--- a/drivers/regulator/rk808-regulator.c
+++ b/drivers/regulator/rk808-regulator.c
@@ -184,6 +184,7 @@ 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",
@@ -198,6 +199,7 @@ 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",
@@ -212,6 +214,7 @@ 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",
@@ -226,6 +229,7 @@ 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",
@@ -240,6 +244,7 @@ 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",
@@ -254,6 +259,7 @@ 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",
@@ -268,6 +274,7 @@ 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",
@@ -282,6 +289,7 @@ 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",
-- 
2.1.0

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