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authorLaxman Dewangan <ldewangan@nvidia.com>2012-03-13 11:35:20 +0530
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-13 23:22:45 +0000
commit0651eed5e094a079a0a9fccd80a41cb3e7f2aa99 (patch)
tree660bb89536fd7e60a5320df923b09b199252a1ba /drivers/regulator
parent5db6d09a2b4663735121dfe4222860424788a93f (diff)
downloadlinux-0651eed5e094a079a0a9fccd80a41cb3e7f2aa99.tar.bz2
regulator: tps65910: Provide settling time for enabling rails
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>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/tps65910-regulator.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c
index aa11ce86ec64..f28f41aec284 100644
--- a/drivers/regulator/tps65910-regulator.c
+++ b/drivers/regulator/tps65910-regulator.c
@@ -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,