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regulator: s2mps11: Add set_suspend_disable for S2MPS14 

S2MPS14 regulators support suspend mode where their status is controlled
by PWREN coming from SoC. This patch implements the set_suspend_disable
for S2MPS14 regulators.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Krzysztof Kozlowski 2014-03-07 11:10:51 +01:00 committed by Mark Brown
parent 15f77300c9
commit 05be09bb5e
2 changed files with 52 additions and 1 deletions
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51
drivers/regulator/s2mps11.c
View File

@ -39,6 +39,11 @@ struct s2mps11_info {
int ramp_delay16;
int ramp_delay7810;
int ramp_delay9;
/*
* One bit for each S2MPS14 regulator whether the suspend mode
* was enabled.
*/
unsigned int s2mps14_suspend_state:30;
};
static int get_ramp_delay(int ramp_delay)
@ -399,15 +404,59 @@ static const struct regulator_desc s2mps11_regulators[] = {
regulator_desc_s2mps11_buck10,
};
static int s2mps14_regulator_enable(struct regulator_dev *rdev)
{
struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
unsigned int val;
if (s2mps11->s2mps14_suspend_state & (1 << rdev_get_id(rdev)))
val = S2MPS14_ENABLE_SUSPEND;
else
val = rdev->desc->enable_mask;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
}
static int s2mps14_regulator_set_suspend_disable(struct regulator_dev *rdev)
{
int ret;
unsigned int val;
struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
/* LDO3 should be always on and does not support suspend mode */
if (rdev_get_id(rdev) == S2MPS14_LDO3)
return 0;
ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
if (ret < 0)
return ret;
s2mps11->s2mps14_suspend_state |= (1 << rdev_get_id(rdev));
/*
* Don't enable suspend mode if regulator is already disabled because
* this would effectively for a short time turn on the regulator after
* resuming.
* However we still want to toggle the suspend_state bit for regulator
* in case if it got enabled before suspending the system.
*/
if (!(val & rdev->desc->enable_mask))
return 0;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, S2MPS14_ENABLE_SUSPEND);
}
static struct regulator_ops s2mps14_reg_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.enable = s2mps14_regulator_enable,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_suspend_disable = s2mps14_regulator_set_suspend_disable,
};
#define regulator_desc_s2mps14_ldo1(num) { \

2
include/linux/mfd/samsung/s2mps14.h
View File

@ -146,6 +146,8 @@ enum s2mps14_regulators {
#define S2MPS14_BUCK_VSEL_MASK 0xFF
#define S2MPS14_ENABLE_MASK (0x03 << S2MPS14_ENABLE_SHIFT)
#define S2MPS14_ENABLE_SHIFT 6
/* On/Off controlled by PWREN */
#define S2MPS14_ENABLE_SUSPEND (0x01 << S2MPS14_ENABLE_SHIFT)
#define S2MPS14_LDO_N_VOLTAGES (S2MPS14_LDO_VSEL_MASK + 1)
#define S2MPS14_BUCK_N_VOLTAGES (S2MPS14_BUCK_VSEL_MASK + 1)