driver:regulator: tps6591x: sleep mode support

Adding controls for the following items
1. PMU SLEEP state enable/disable
2. Keep 32KHz clock out on sleep mode
3. Keep thermal monitor on sleep mode
4. Keep LDO full load capability on sleep mode
5. Keep high speed internal clock on sleep mode
3. Turn off power rails on sleep mode

Original-Change-Id: I389bca4a4d7ff9ae264727af8e93dcec796d3c0c
Reviewed-on: http://git-master/r/32222
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Tested-by: Chih-Lung Huang <lhuang@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>

Rebase-Id: Rb1423bd228beab0d3880635877b5589c6a0bb426

1 files changed, 48 insertions, 28 deletions

diff --git a/drivers/regulator/tps6591x-regulator.c b/drivers/regulator/tps6591x-regulator.c
index ef479afdb1a9..2fff27aa8a33 100644
--- a/drivers/regulator/tps6591x-regulator.c
+++ b/drivers/regulator/tps6591x-regulator.c
@@ -51,6 +51,8 @@
 #define TPS6591X_LDO6_ADD		0x35
 #define TPS6591X_LDO7_ADD		0x34
 #define TPS6591X_LDO8_ADD		0x33
+#define TPS6591X_SLEEP_SET_LDO_OFF_ADD	0x43
+#define TPS6591X_SLEEP_SET_RES_OFF_ADD	0x44
 #define TPS6591X_EN1_LDO_ADD		0x45
 #define TPS6591X_EN1_SMPS_ADD		0x46
 #define TPS6591X_EN2_LDO_ADD		0x47
@@ -79,6 +81,7 @@ struct tps6591x_regulator {
 	struct tps6591x_register_info op_reg;
 	struct tps6591x_register_info sr_reg;
 	struct tps6591x_register_info en1_reg;
+	struct tps6591x_register_info slp_off_reg;
 
 	int *voltages;
 
@@ -102,7 +105,8 @@ static int __tps6591x_ext_control_set(struct device *parent,
 				      enum tps6591x_ext_control ectrl)
 {
 	int ret;
-	uint8_t mask, reg_val, addr;
+	uint8_t mask, reg_val, addr, offset;
+	struct tps6591x_register_info *ext_reg;
 
 	/* For regulator that has separate operational and sleep register make
 	   sure that operational is used and clear sleep register to turn
@@ -129,17 +133,24 @@ static int __tps6591x_ext_control_set(struct device *parent,
 			return ret;
 	}
 
+	offset = 0;
 	switch (ectrl) {
+	case EXT_CTRL_EN2:
+		offset = EN1_EN2_OFFSET;
+		/* fall through to EXT_CTRL_EN1 */
 	case EXT_CTRL_EN1:
-		addr = ri->en1_reg.addr;
+		ext_reg = &(ri->en1_reg);
 		break;
-	case EXT_CTRL_EN2:
-		addr = ri->en1_reg.addr + EN1_EN2_OFFSET;
+	case EXT_CTRL_SLEEP_OFF:
+		ext_reg = &(ri->slp_off_reg);
 		break;
 	default:
 		return -EINVAL;
 	}
-	mask = ((1 << ri->en1_reg.nbits) - 1) << ri->en1_reg.shift_bits;
+
+	addr = ext_reg->addr + offset;
+	mask = ((1 << ext_reg->nbits) - 1) << ext_reg->shift_bits;
+
 	return tps6591x_update(parent, addr, mask, mask);
 }
 
@@ -519,7 +530,8 @@ static int tps6591x_vddctrl_voltages[] = {
 
 #define TPS6591X_REGULATOR(_id, vdata, _ops, s_addr, s_nbits, s_shift,		\
 			s_type, op_addr, op_nbits, op_shift, sr_addr,		\
-			sr_nbits, sr_shift, en1_addr, en1_shift, en_time)	\
+			sr_nbits, sr_shift, en1_addr, en1_shift, slp_off_addr,	\
+			slp_off_shift, en_time)					\
 	.desc	= {								\
 		.name	= tps6591x_rails(_id),					\
 		.ops	= &tps6591x_regulator_##_ops,				\
@@ -549,59 +561,67 @@ static int tps6591x_vddctrl_voltages[] = {
 		.nbits	= 1,							\
 		.shift_bits = en1_shift,					\
 	},									\
+	.slp_off_reg	= {							\
+		.addr	= TPS6591X_SLEEP_SET_##slp_off_addr##_ADD,		\
+		.nbits	= 1,							\
+		.shift_bits = slp_off_shift,					\
+	},									\
 	.voltages	= tps6591x_##vdata##_voltages,				\
 	.delay		= en_time,
 
 #define TPS6591X_VIO(_id, vdata, s_addr, s_nbits, s_shift, s_type,	\
-			en1_shift, en_time)				\
+			en1_shift, slp_off_shift, en_time)		\
 {									\
 	TPS6591X_REGULATOR(_id, vdata, vio_ops, s_addr, s_nbits,	\
 			s_shift, s_type, INVALID, 0, 0,	INVALID, 0, 0,	\
-			EN1_SMPS, en1_shift, en_time)			\
+			EN1_SMPS, en1_shift, RES_OFF, slp_off_shift,	\
+			en_time)					\
 }
 
 #define TPS6591X_LDO1(_id, vdata, s_addr, s_nbits, s_shift, s_type,	\
-			en1_shift, en_time)				\
+			en1_shift, slp_off_shift, en_time)		\
 {									\
 	TPS6591X_REGULATOR(_id, vdata, ldo1_ops, s_addr, s_nbits,	\
-			s_shift, s_type, INVALID, 0, 0,	INVALID, 0, 0,	\
-			EN1_LDO, en1_shift, en_time)			\
+			s_shift, s_type, INVALID, 0, 0, INVALID, 0, 0,	\
+			EN1_LDO, en1_shift, LDO_OFF, slp_off_shift,	\
+			en_time)					\
 }
 
 #define TPS6591X_LDO3(_id, vdata, s_addr, s_nbits, s_shift, s_type,	\
-			en1_shift, en_time)				\
+			en1_shift, slp_off_shift, en_time)		\
 {									\
 	TPS6591X_REGULATOR(_id, vdata, ldo3_ops, s_addr, s_nbits,	\
-			s_shift, s_type, INVALID, 0, 0,	INVALID, 0, 0,	\
-			EN1_LDO, en1_shift, en_time)			\
+			s_shift, s_type, INVALID, 0, 0, INVALID, 0, 0,	\
+			EN1_LDO, en1_shift, LDO_OFF, slp_off_shift,	\
+			en_time)					\
 }
 
 #define TPS6591X_VDD(_id, vdata, s_addr, s_nbits, s_shift, s_type,	\
 			op_addr, op_nbits, op_shift, sr_addr, sr_nbits,	\
-			sr_shift, en1_shift, en_time)			\
+			sr_shift, en1_shift, slp_off_shift, en_time)	\
 {									\
 	TPS6591X_REGULATOR(_id, vdata, vdd_ops, s_addr, s_nbits,	\
 			s_shift, s_type, op_addr, op_nbits, op_shift,	\
 			sr_addr, sr_nbits, sr_shift, EN1_SMPS,		\
-			en1_shift, en_time)				\
+			en1_shift, RES_OFF, slp_off_shift, en_time)	\
 }
 
 static struct tps6591x_regulator tps6591x_regulator[] = {
-	TPS6591X_VIO(VIO, vio, VIO, 2, 2, single_reg, 0, 350),
-	TPS6591X_LDO1(LDO_1, ldo124, LDO1, 6, 2, single_reg, 1, 420),
-	TPS6591X_LDO1(LDO_2, ldo124, LDO2, 6, 2, single_reg, 2, 420),
-	TPS6591X_LDO3(LDO_3, ldo35678, LDO3, 5, 2, single_reg, 7, 230),
-	TPS6591X_LDO1(LDO_4, ldo124, LDO4, 6, 2, single_reg, 6, 230),
-	TPS6591X_LDO3(LDO_5, ldo35678, LDO5, 5, 2, single_reg, 3, 230),
-	TPS6591X_LDO3(LDO_6, ldo35678, LDO6, 5, 2, single_reg, 0, 230),
-	TPS6591X_LDO3(LDO_7, ldo35678, LDO7, 5, 2, single_reg, 5, 230),
-	TPS6591X_LDO3(LDO_8, ldo35678, LDO8, 5, 2, single_reg, 4, 230),
+	TPS6591X_VIO(VIO, vio, VIO, 2, 2, single_reg, 0, 0, 350),
+	TPS6591X_LDO1(LDO_1, ldo124, LDO1, 6, 2, single_reg, 1, 1, 420),
+	TPS6591X_LDO1(LDO_2, ldo124, LDO2, 6, 2, single_reg, 2, 2, 420),
+	TPS6591X_LDO3(LDO_3, ldo35678, LDO3, 5, 2, single_reg, 7, 7, 230),
+	TPS6591X_LDO1(LDO_4, ldo124, LDO4, 6, 2, single_reg, 6, 6, 230),
+	TPS6591X_LDO3(LDO_5, ldo35678, LDO5, 5, 2, single_reg, 3, 3, 230),
+	TPS6591X_LDO3(LDO_6, ldo35678, LDO6, 5, 2, single_reg, 0, 0, 230),
+	TPS6591X_LDO3(LDO_7, ldo35678, LDO7, 5, 2, single_reg, 5, 5, 230),
+	TPS6591X_LDO3(LDO_8, ldo35678, LDO8, 5, 2, single_reg, 4, 4, 230),
 	TPS6591X_VDD(VDD_1, vdd, VDD1, 2, 0, sr_op_reg, VDD1_OP,
-		7, 0, VDD1_SR, 7, 0, 1, 350),
+		7, 0, VDD1_SR, 7, 0, 1, 1, 350),
 	TPS6591X_VDD(VDD_2, vdd, VDD2, 2, 0, sr_op_reg, VDD2_OP,
-		7, 0, VDD2_SR, 7, 0, 2, 350),
+		7, 0, VDD2_SR, 7, 0, 2, 2, 350),
 	TPS6591X_VDD(VDDCTRL, vddctrl, VDDCTRL, 2, 0, sr_op_reg,
-		VDDCTRL_OP, 7, 0, VDDCTRL_SR, 7, 0, 3, 900),
+		VDDCTRL_OP, 7, 0, VDDCTRL_SR, 7, 0, 3, 3, 900),
 };
 
 static inline int tps6591x_regulator_preinit(struct device *parent,