regulator: tps65910: Provide settling time for enabling rails
Laxman Dewangan [Tue, 13 Mar 2012 06:05:20 +0000 (11:05 +0530)]
There is settling time for each rails when it is switched to
ON. Implementing enable time for returning proper settling time
of regulator rails when it is enabled.
Filling the on-time for each rail as per tps65910/tps65911
datasheets.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit 0651eed5e094a079a0a9fccd80a41cb3e7f2aa99)

Change-Id: Ibdb05171cfb4c4e7a064c8f65193647997e8e9a8
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/90517
Reviewed-by: Automatic_Commit_Validation_User

drivers/regulator/tps65910-regulator.c

index ed23dd2..2caa9b7 100644 (file)
@@ -89,11 +89,13 @@ struct tps_info {
        unsigned max_uV;
        u8 n_voltages;
        const u16 *voltage_table;
+       int enable_time_us;
 };
 
 static struct tps_info tps65910_regs[] = {
        {
                .name = "VRTC",
+               .enable_time_us = 2200,
        },
        {
                .name = "VIO",
@@ -101,16 +103,19 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 3300000,
                .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
                .voltage_table = VIO_VSEL_table,
+               .enable_time_us = 350,
        },
        {
                .name = "VDD1",
                .min_uV = 600000,
                .max_uV = 4500000,
+               .enable_time_us = 350,
        },
        {
                .name = "VDD2",
                .min_uV = 600000,
                .max_uV = 4500000,
+               .enable_time_us = 350,
        },
        {
                .name = "VDD3",
@@ -118,6 +123,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 5000000,
                .n_voltages = ARRAY_SIZE(VDD3_VSEL_table),
                .voltage_table = VDD3_VSEL_table,
+               .enable_time_us = 200,
        },
        {
                .name = "VDIG1",
@@ -125,6 +131,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 2700000,
                .n_voltages = ARRAY_SIZE(VDIG1_VSEL_table),
                .voltage_table = VDIG1_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VDIG2",
@@ -132,6 +139,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 1800000,
                .n_voltages = ARRAY_SIZE(VDIG2_VSEL_table),
                .voltage_table = VDIG2_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VPLL",
@@ -139,6 +147,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 2500000,
                .n_voltages = ARRAY_SIZE(VPLL_VSEL_table),
                .voltage_table = VPLL_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VDAC",
@@ -146,6 +155,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 2850000,
                .n_voltages = ARRAY_SIZE(VDAC_VSEL_table),
                .voltage_table = VDAC_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VAUX1",
@@ -153,6 +163,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 2850000,
                .n_voltages = ARRAY_SIZE(VAUX1_VSEL_table),
                .voltage_table = VAUX1_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VAUX2",
@@ -160,6 +171,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 3300000,
                .n_voltages = ARRAY_SIZE(VAUX2_VSEL_table),
                .voltage_table = VAUX2_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VAUX33",
@@ -167,6 +179,7 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 3300000,
                .n_voltages = ARRAY_SIZE(VAUX33_VSEL_table),
                .voltage_table = VAUX33_VSEL_table,
+               .enable_time_us = 100,
        },
        {
                .name = "VMMC",
@@ -174,12 +187,14 @@ static struct tps_info tps65910_regs[] = {
                .max_uV = 3300000,
                .n_voltages = ARRAY_SIZE(VMMC_VSEL_table),
                .voltage_table = VMMC_VSEL_table,
+               .enable_time_us = 100,
        },
 };
 
 static struct tps_info tps65911_regs[] = {
        {
                .name = "VRTC",
+               .enable_time_us = 2200,
        },
        {
                .name = "VIO",
@@ -187,72 +202,84 @@ static struct tps_info tps65911_regs[] = {
                .max_uV = 3300000,
                .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
                .voltage_table = VIO_VSEL_table,
+               .enable_time_us = 350,
        },
        {
                .name = "VDD1",
                .min_uV = 600000,
                .max_uV = 4500000,
                .n_voltages = 73,
+               .enable_time_us = 350,
        },
        {
                .name = "VDD2",
                .min_uV = 600000,
                .max_uV = 4500000,
                .n_voltages = 73,
+               .enable_time_us = 350,
        },
        {
                .name = "VDDCTRL",
                .min_uV = 600000,
                .max_uV = 1400000,
                .n_voltages = 65,
+               .enable_time_us = 900,
        },
        {
                .name = "LDO1",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 47,
+               .enable_time_us = 420,
        },
        {
                .name = "LDO2",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 47,
+               .enable_time_us = 420,
        },
        {
                .name = "LDO3",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 24,
+               .enable_time_us = 230,
        },
        {
                .name = "LDO4",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 47,
+               .enable_time_us = 230,
        },
        {
                .name = "LDO5",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 24,
+               .enable_time_us = 230,
        },
        {
                .name = "LDO6",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 24,
+               .enable_time_us = 230,
        },
        {
                .name = "LDO7",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 24,
+               .enable_time_us = 230,
        },
        {
                .name = "LDO8",
                .min_uV = 1000000,
                .max_uV = 3300000,
                .n_voltages = 24,
+               .enable_time_us = 230,
        },
 };
 
@@ -482,6 +509,12 @@ static int tps65910_disable(struct regulator_dev *dev)
        return tps65910_clear_bits(mfd, reg, TPS65910_SUPPLY_STATE_ENABLED);
 }
 
+static int tps65910_enable_time(struct regulator_dev *dev)
+{
+       struct tps65910_reg *pmic = rdev_get_drvdata(dev);
+       int id = rdev_get_id(dev);
+       return pmic->info[id]->enable_time_us;
+}
 
 static int tps65910_set_mode(struct regulator_dev *dev, unsigned int mode)
 {
@@ -866,6 +899,7 @@ static struct regulator_ops tps65910_ops_dcdc = {
        .is_enabled             = tps65910_is_enabled,
        .enable                 = tps65910_enable,
        .disable                = tps65910_disable,
+       .enable_time            = tps65910_enable_time,
        .set_mode               = tps65910_set_mode,
        .get_mode               = tps65910_get_mode,
        .get_voltage            = tps65910_get_voltage_dcdc,
@@ -877,6 +911,7 @@ static struct regulator_ops tps65910_ops_vdd3 = {
        .is_enabled             = tps65910_is_enabled,
        .enable                 = tps65910_enable,
        .disable                = tps65910_disable,
+       .enable_time            = tps65910_enable_time,
        .set_mode               = tps65910_set_mode,
        .get_mode               = tps65910_get_mode,
        .get_voltage            = tps65910_get_voltage_vdd3,
@@ -887,6 +922,7 @@ static struct regulator_ops tps65910_ops = {
        .is_enabled             = tps65910_is_enabled,
        .enable                 = tps65910_enable,
        .disable                = tps65910_disable,
+       .enable_time            = tps65910_enable_time,
        .set_mode               = tps65910_set_mode,
        .get_mode               = tps65910_get_mode,
        .get_voltage            = tps65910_get_voltage,
@@ -898,6 +934,7 @@ static struct regulator_ops tps65911_ops = {
        .is_enabled             = tps65910_is_enabled,
        .enable                 = tps65910_enable,
        .disable                = tps65910_disable,
+       .enable_time            = tps65910_enable_time,
        .set_mode               = tps65910_set_mode,
        .get_mode               = tps65910_get_mode,
        .get_voltage            = tps65911_get_voltage,