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 <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/as3722-regulator.c b/drivers/regulator/as3722-regulator.c
index 8b046ee..35a7c64 100644 (file)
--- 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 8d43e9f..51e6f94 100644 (file)
--- 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