regulator: da9121: add mode support

Adds get/set for mode, and mapping from REGULATOR_MODE_* to select
PFM/PWM/Auto operation.

Signed-off-by: Adam Ward <Adam.Ward.opensource@diasemi.com>
Link: https://lore.kernel.org/r/7844c8f6facb6f7c0649381629cc75ccad14723d.1606755367.git.Adam.Ward.opensource@diasemi.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index a69acb26f74884fb07b0f82a5a16c637abf21cfc..8e50f55af45d9a6fd8f1453abf6802fa6b05c263 100644 (file)
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -101,6 +101,11 @@ static const struct da9121_field da9121_current_field[2] = {
        { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 };
 
+static const struct da9121_field da9121_mode_field[2] = {
+       { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
+       { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
+};
+
 static int da9121_get_current_limit(struct regulator_dev *rdev)
 {
        struct da9121 *chip = rdev_get_drvdata(rdev);
@@ -202,6 +207,67 @@ error:
        return ret;
 }
 
+static unsigned int da9121_map_mode(unsigned int mode)
+{
+       switch (mode) {
+       case DA9121_BUCK_MODE_FORCE_PWM:
+               return REGULATOR_MODE_FAST;
+       case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
+               return REGULATOR_MODE_NORMAL;
+       case DA9121_BUCK_MODE_AUTO:
+               return REGULATOR_MODE_IDLE;
+       case DA9121_BUCK_MODE_FORCE_PFM:
+               return REGULATOR_MODE_STANDBY;
+       default:
+               return -EINVAL;
+       }
+}
+
+static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+       struct da9121 *chip = rdev_get_drvdata(rdev);
+       int id = rdev_get_id(rdev);
+       unsigned int val;
+
+       switch (mode) {
+       case REGULATOR_MODE_FAST:
+               val = DA9121_BUCK_MODE_FORCE_PWM;
+               break;
+       case REGULATOR_MODE_NORMAL:
+               val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
+               break;
+       case REGULATOR_MODE_IDLE:
+               val = DA9121_BUCK_MODE_AUTO;
+               break;
+       case REGULATOR_MODE_STANDBY:
+               val = DA9121_BUCK_MODE_FORCE_PFM;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return regmap_update_bits(chip->regmap,
+                                 da9121_mode_field[id].reg,
+                                 da9121_mode_field[id].msk,
+                                 val);
+}
+
+static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
+{
+       struct da9121 *chip = rdev_get_drvdata(rdev);
+       int id = rdev_get_id(rdev);
+       unsigned int val;
+       int ret = 0;
+
+       ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
+       if (ret < 0) {
+               dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
+               return -EINVAL;
+       }
+
+       return da9121_map_mode(val & da9121_mode_field[id].msk);
+}
+
 static const struct regulator_ops da9121_buck_ops = {
        .enable = regulator_enable_regmap,
        .disable = regulator_disable_regmap,
@@ -211,6 +277,8 @@ static const struct regulator_ops da9121_buck_ops = {
        .list_voltage = regulator_list_voltage_linear,
        .get_current_limit = da9121_get_current_limit,
        .set_current_limit = da9121_set_current_limit,
+       .set_mode = da9121_buck_set_mode,
+       .get_mode = da9121_buck_get_mode,
 };
 
 static struct of_regulator_match da9121_matches[] = {
@@ -285,6 +353,7 @@ static const struct regulator_desc da9121_reg = {
        .of_parse_cb = da9121_of_parse_cb,
        .owner = THIS_MODULE,
        .regulators_node = of_match_ptr("regulators"),
+       .of_map_mode = da9121_map_mode,
        .ops = &da9121_buck_ops,
        .type = REGULATOR_VOLTAGE,
        .n_voltages = DA9121_N_VOLTAGES,
@@ -309,6 +378,7 @@ static const struct regulator_desc da9220_reg[2] = {
                .of_parse_cb = da9121_of_parse_cb,
                .owner = THIS_MODULE,
                .regulators_node = of_match_ptr("regulators"),
+               .of_map_mode = da9121_map_mode,
                .ops = &da9121_buck_ops,
                .type = REGULATOR_VOLTAGE,
                .n_voltages = DA9121_N_VOLTAGES,
@@ -327,6 +397,7 @@ static const struct regulator_desc da9220_reg[2] = {
                .of_parse_cb = da9121_of_parse_cb,
                .owner = THIS_MODULE,
                .regulators_node = of_match_ptr("regulators"),
+               .of_map_mode = da9121_map_mode,
                .ops = &da9121_buck_ops,
                .type = REGULATOR_VOLTAGE,
                .n_voltages = DA9121_N_VOLTAGES,
@@ -348,6 +419,7 @@ static const struct regulator_desc da9122_reg[2] = {
                .of_parse_cb = da9121_of_parse_cb,
                .owner = THIS_MODULE,
                .regulators_node = of_match_ptr("regulators"),
+               .of_map_mode = da9121_map_mode,
                .ops = &da9121_buck_ops,
                .type = REGULATOR_VOLTAGE,
                .n_voltages = DA9121_N_VOLTAGES,
@@ -366,6 +438,7 @@ static const struct regulator_desc da9122_reg[2] = {
                .of_parse_cb = da9121_of_parse_cb,
                .owner = THIS_MODULE,
                .regulators_node = of_match_ptr("regulators"),
+               .of_map_mode = da9121_map_mode,
                .ops = &da9121_buck_ops,
                .type = REGULATOR_VOLTAGE,
                .n_voltages = DA9121_N_VOLTAGES,
@@ -386,6 +459,7 @@ static const struct regulator_desc da9217_reg = {
        .of_parse_cb = da9121_of_parse_cb,
        .owner = THIS_MODULE,
        .regulators_node = of_match_ptr("regulators"),
+       .of_map_mode = da9121_map_mode,
        .ops = &da9121_buck_ops,
        .type = REGULATOR_VOLTAGE,
        .n_voltages = DA9121_N_VOLTAGES,