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Subject[PATCH V4 09/10] 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>
---
drivers/regulator/da9121-regulator.c | 74 ++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)

diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index a69acb2..8e50f55 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -101,6 +101,11 @@ struct da9121_field {
{ 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 @@ static int da9121_set_current_limit(struct regulator_dev *rdev,
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 int da9121_set_current_limit(struct regulator_dev *rdev,
.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 int da9121_of_parse_cb(struct device_node *np,
.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 int da9121_of_parse_cb(struct device_node *np,
.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 int da9121_of_parse_cb(struct device_node *np,
.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 int da9121_of_parse_cb(struct device_node *np,
.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 int da9121_of_parse_cb(struct device_node *np,
.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 int da9121_of_parse_cb(struct device_node *np,
.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,
--
1.9.1
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