regulator: palams: add support for disabling pulldown of LDOs

Add support for disabling pull down of the LDOs. this is configurable
from platforms.

bug 1494740

Change-Id: I8c3e02f36b3045fa25a8c881a10c686ab9c63967
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/418246
(cherry picked from commit 0894c40230017f0fbb0f463a0c5027738b1d2b1f)
Reviewed-on: http://git-master/r/419339
Tested-by: Venkat Reddy Talla <vreddytalla@nvidia.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 77a416cd5206..8fec532171e4 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -40,6 +40,8 @@ struct regs_info {
 	u8	pd_cntrl_addr;
 	int	sleep_id;
 	int	pd_bit;
+	u8	pd_ctrl_addr;
+	int	pd_ctrl_bits;
 };
 
 static const struct regs_info palmas_regs_info[] = {
@@ -154,6 +156,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO1,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO1,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO1,
 	},
 	{
 		.name		= "LDO2",
@@ -163,6 +167,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO2,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO2,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO2,
 	},
 	{
 		.name		= "LDO3",
@@ -172,6 +178,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO3,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO3,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO3,
 	},
 	{
 		.name		= "LDO4",
@@ -181,6 +189,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO4,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO4,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO4,
 	},
 	{
 		.name		= "LDO5",
@@ -190,6 +200,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO5,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO5,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO5,
 	},
 	{
 		.name		= "LDO6",
@@ -199,6 +211,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO6,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO6,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO6,
 	},
 	{
 		.name		= "LDO7",
@@ -208,6 +222,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO7,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO7,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO7,
 	},
 	{
 		.name		= "LDO8",
@@ -217,6 +233,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO8,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL1,
 		.pd_bit		= PALMAS_LDO_PD_CTRL1_LDO8,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL1,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL1_LDO8,
 	},
 	{
 		.name		= "LDO9",
@@ -226,6 +244,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO9,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO9,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO9,
 	},
 	{
 		.name		= "LDO10",
@@ -235,6 +255,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO10,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO10,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO10,
 	},
 	{
 		.name		= "LDO11",
@@ -244,6 +266,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO11,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO11,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO11,
 	},
 	{
 		.name		= "LDO12",
@@ -253,6 +277,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO12,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO12,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO12,
 	},
 	{
 		.name		= "LDO13",
@@ -262,6 +288,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO13,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO13,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO13,
 	},
 	{
 		.name		= "LDO14",
@@ -271,6 +299,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDO14,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDO14,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDO14,
 	},
 	{
 		.name		= "LDOLN",
@@ -280,6 +310,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDOLN,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDOLN,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDOLN,
 	},
 	{
 		.name		= "LDOUSB",
@@ -289,6 +321,8 @@ static const struct regs_info palmas_regs_info[] = {
 		.sleep_id	= PALMAS_EXTERNAL_REQSTR_ID_LDOUSB,
 		.pd_cntrl_addr	= PALMAS_LDO_PD_CTRL2,
 		.pd_bit		= PALMAS_LDO_PD_CTRL2_LDOUSB,
+		.pd_ctrl_addr	= PALMAS_LDO_PD_CTRL2,
+		.pd_ctrl_bits	= PALMAS_LDO_PD_CTRL2_LDOUSB,
 	},
 	{
 		.name		= "REGEN1",
@@ -1053,6 +1087,18 @@ static int palmas_ldo_init(struct regulator_dev *rdev,
 
 	palams_rail_pd_control(palmas, id,
 		reg_init->disable_active_discharge_idle);
+
+	if (reg_init->disable_pull_down) {
+		ret = palmas_update_bits(palmas, PALMAS_LDO_BASE,
+			palmas_regs_info[id].pd_ctrl_addr,
+			palmas_regs_info[id].pd_ctrl_bits, 0);
+		if (ret < 0) {
+			dev_err(palmas->dev,
+				"LDO_PD_CTRL 0x%02x update failed: %d\n",
+					palmas_regs_info[id].pd_ctrl_addr, ret);
+			return;
+		}
+	}
 	return 0;
 }
 
@@ -1322,6 +1368,10 @@ static void palmas_dt_to_pdata(struct device *dev,
 			of_property_read_bool(palmas_matches[idx].of_node,
 					     "ti,warm-reset");
 
+		pdata->reg_init[idx]->disable_pull_down =
+			of_property_read_bool(palmas_matches[idx].of_node,
+					     "ti,disable-pull-down");
+
 		ret = of_property_read_u32(palmas_matches[idx].of_node,
 					      "ti,roof-floor", &prop);
 		/* EINVAL: Property not found */