From 40a865500c4d408b552cf5899bf091ac72e32bf8 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Thu, 7 Apr 2016 16:22:38 +0200 Subject: [PATCH] regulator: as3722: Add bypass support for LDO6 LD06 on the AS3722 power management IC supports a bypass mode. Bypass is enabled for the LDO by writing the value 0x3F to the voltage select field in the control register for the LDO. Note that this is the same register and field that is used to select the voltage as well for the LDO. Add support for bypass on LDO6 by specifying the various bypass parameters for regulator and adding new function pointer tables for the LDO. Note that the bypass OFF value is the same as the ON value simply because there is no actual OFF value and bypass will be disabled when a new voltage is written to the VSEL field. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding Signed-off-by: Mark Brown --- drivers/regulator/as3722-regulator.c | 43 ++++++++++++++++++++++++++++ include/linux/mfd/as3722.h | 1 + 2 files changed, 44 insertions(+) diff --git a/drivers/regulator/as3722-regulator.c b/drivers/regulator/as3722-regulator.c index 8b046eec6ae0..35a7c647f6a9 100644 --- a/drivers/regulator/as3722-regulator.c +++ b/drivers/regulator/as3722-regulator.c @@ -432,6 +432,31 @@ static struct regulator_ops as3722_ldo3_extcntrl_ops = { .get_current_limit = as3722_ldo3_get_current_limit, }; +static struct regulator_ops as3722_ldo6_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear_range, + .get_current_limit = as3722_ldo_get_current_limit, + .set_current_limit = as3722_ldo_set_current_limit, + .get_bypass = regulator_get_bypass_regmap, + .set_bypass = regulator_set_bypass_regmap, +}; + +static struct regulator_ops as3722_ldo6_extcntrl_ops = { + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear_range, + .get_current_limit = as3722_ldo_get_current_limit, + .set_current_limit = as3722_ldo_set_current_limit, + .get_bypass = regulator_get_bypass_regmap, + .set_bypass = regulator_set_bypass_regmap, +}; + static const struct regulator_linear_range as3722_ldo_ranges[] = { REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0), REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000), @@ -829,6 +854,24 @@ static int as3722_regulator_probe(struct platform_device *pdev) } } break; + case AS3722_REGULATOR_ID_LDO6: + if (reg_config->ext_control) + ops = &as3722_ldo6_extcntrl_ops; + else + ops = &as3722_ldo6_ops; + as3722_regs->desc[id].enable_time = 500; + as3722_regs->desc[id].bypass_reg = + AS3722_LDO6_VOLTAGE_REG; + as3722_regs->desc[id].bypass_mask = + AS3722_LDO_VSEL_MASK; + as3722_regs->desc[id].bypass_val_on = + AS3722_LDO6_VSEL_BYPASS; + as3722_regs->desc[id].bypass_val_off = + AS3722_LDO6_VSEL_BYPASS; + as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges; + as3722_regs->desc[id].n_linear_ranges = + ARRAY_SIZE(as3722_ldo_ranges); + break; case AS3722_REGULATOR_ID_SD0: case AS3722_REGULATOR_ID_SD1: case AS3722_REGULATOR_ID_SD6: diff --git a/include/linux/mfd/as3722.h b/include/linux/mfd/as3722.h index 8d43e9f2a842..51e6f9414575 100644 --- a/include/linux/mfd/as3722.h +++ b/include/linux/mfd/as3722.h @@ -196,6 +196,7 @@ #define AS3722_LDO3_VSEL_MIN 0x01 #define AS3722_LDO3_VSEL_MAX 0x2D #define AS3722_LDO3_NUM_VOLT 0x2D +#define AS3722_LDO6_VSEL_BYPASS 0x3F #define AS3722_LDO_VSEL_MASK 0x7F #define AS3722_LDO_VSEL_MIN 0x01 #define AS3722_LDO_VSEL_MAX 0x7F