diff options
| author | Doug Anderson <dianders@chromium.org> | 2014-09-16 21:22:54 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-09-16 22:27:53 +0400 |
| commit | 8af252272a0d634b59c4c7fa88200b06695decde (patch) | |
| tree | adaafd66d61b4e46885083d172dd781f3778e709 /drivers/regulator/rk808-regulator.c | |
| parent | 1ed3f8ce8399255c7cca43dde5d3a19b2b7dc287 (diff) | |
| download | linux-8af252272a0d634b59c4c7fa88200b06695decde.tar.xz | |
regulator: rk808: Add function for ramp delay for buck1/buck2
On rk808 buck1 and buck2 have programmable ramp delays. Let's add a
function to allow a client of rk808 to set them.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/rk808-regulator.c')
| -rw-r--r-- | drivers/regulator/rk808-regulator.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c index 07b0eb4adf42..e305416d7697 100644 --- a/drivers/regulator/rk808-regulator.c +++ b/drivers/regulator/rk808-regulator.c @@ -28,6 +28,21 @@ #define RK808_BUCK4_VSEL_MASK 0xf #define RK808_LDO_VSEL_MASK 0x1f +/* Ramp rate definitions for buck1 / buck2 only */ +#define RK808_RAMP_RATE_OFFSET 3 +#define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET) +#define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET) +#define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET) +#define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET) +#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET) + +static const int rk808_buck_config_regs[] = { + RK808_BUCK1_CONFIG_REG, + RK808_BUCK2_CONFIG_REG, + RK808_BUCK3_CONFIG_REG, + RK808_BUCK4_CONFIG_REG, +}; + static const struct regulator_linear_range rk808_buck_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500), }; @@ -49,6 +64,44 @@ static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000), }; +static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) +{ + unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; + unsigned int reg = rk808_buck_config_regs[rdev->desc->id - + RK808_ID_DCDC1]; + + switch (ramp_delay) { + case 1 ... 2000: + ramp_value = RK808_RAMP_RATE_2MV_PER_US; + break; + case 2001 ... 4000: + ramp_value = RK808_RAMP_RATE_4MV_PER_US; + break; + case 4001 ... 6000: + ramp_value = RK808_RAMP_RATE_6MV_PER_US; + break; + case 6001 ... 10000: + break; + default: + pr_warn("%s ramp_delay: %d not supported, setting 10000\n", + rdev->desc->name, ramp_delay); + } + + return regmap_update_bits(rdev->regmap, reg, + RK808_RAMP_RATE_MASK, ramp_value); +} + +static struct regulator_ops rk808_buck1_2_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_ramp_delay = rk808_set_ramp_delay, +}; + static struct regulator_ops rk808_reg_ops = { .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, @@ -70,7 +123,7 @@ static const struct regulator_desc rk808_reg[] = { .name = "DCDC_REG1", .supply_name = "vcc1", .id = RK808_ID_DCDC1, - .ops = &rk808_reg_ops, + .ops = &rk808_buck1_2_ops, .type = REGULATOR_VOLTAGE, .n_voltages = 64, .linear_ranges = rk808_buck_voltage_ranges, @@ -84,7 +137,7 @@ static const struct regulator_desc rk808_reg[] = { .name = "DCDC_REG2", .supply_name = "vcc2", .id = RK808_ID_DCDC2, - .ops = &rk808_reg_ops, + .ops = &rk808_buck1_2_ops, .type = REGULATOR_VOLTAGE, .n_voltages = 64, .linear_ranges = rk808_buck_voltage_ranges, |