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path: root/drivers/regulator/da9063-regulator.c
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Diffstat (limited to 'drivers/regulator/da9063-regulator.c')
-rw-r--r--drivers/regulator/da9063-regulator.c132
1 files changed, 130 insertions, 2 deletions
diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
index cf7d5341750e..82f52a2a031a 100644
--- a/drivers/regulator/da9063-regulator.c
+++ b/drivers/regulator/da9063-regulator.c
@@ -412,6 +412,134 @@ static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev,
return regmap_field_write(regl->suspend_sleep, val);
}
+static unsigned int da9063_get_overdrive_mask(const struct regulator_desc *desc)
+{
+ switch (desc->id) {
+ case DA9063_ID_BCORES_MERGED:
+ case DA9063_ID_BCORE1:
+ return DA9063_BCORE1_OD;
+ case DA9063_ID_BCORE2:
+ return DA9063_BCORE2_OD;
+ case DA9063_ID_BPRO:
+ return DA9063_BPRO_OD;
+ default:
+ return 0;
+ }
+}
+
+static int da9063_buck_set_limit_set_overdrive(struct regulator_dev *rdev,
+ int min_uA, int max_uA,
+ unsigned int overdrive_mask)
+{
+ /*
+ * When enabling overdrive, do it before changing the current limit to
+ * ensure sufficient supply throughout the switch.
+ */
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ int ret;
+ unsigned int orig_overdrive;
+
+ ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H,
+ &orig_overdrive);
+ if (ret < 0)
+ return ret;
+ orig_overdrive &= overdrive_mask;
+
+ if (orig_overdrive == 0) {
+ ret = regmap_set_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
+ overdrive_mask);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = regulator_set_current_limit_regmap(rdev, min_uA / 2, max_uA / 2);
+ if (ret < 0 && orig_overdrive == 0)
+ /*
+ * regulator_set_current_limit_regmap may have rejected the
+ * change because of unusable min_uA and/or max_uA inputs.
+ * Attempt to restore original overdrive state, ignore failure-
+ * on-failure.
+ */
+ regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
+ overdrive_mask);
+
+ return ret;
+}
+
+static int da9063_buck_set_limit_clear_overdrive(struct regulator_dev *rdev,
+ int min_uA, int max_uA,
+ unsigned int overdrive_mask)
+{
+ /*
+ * When disabling overdrive, do it after changing the current limit to
+ * ensure sufficient supply throughout the switch.
+ */
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ int ret, orig_limit;
+
+ ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &orig_limit);
+ if (ret < 0)
+ return ret;
+
+ ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_clear_bits(regl->hw->regmap, DA9063_REG_CONFIG_H,
+ overdrive_mask);
+ if (ret < 0)
+ /*
+ * Attempt to restore original current limit, ignore failure-
+ * on-failure.
+ */
+ regmap_write(rdev->regmap, rdev->desc->csel_reg, orig_limit);
+
+ return ret;
+}
+
+static int da9063_buck_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ unsigned int overdrive_mask, n_currents;
+
+ overdrive_mask = da9063_get_overdrive_mask(rdev->desc);
+ if (overdrive_mask) {
+ n_currents = rdev->desc->n_current_limits;
+ if (n_currents == 0)
+ return -EINVAL;
+
+ if (max_uA > rdev->desc->curr_table[n_currents - 1])
+ return da9063_buck_set_limit_set_overdrive(rdev, min_uA,
+ max_uA,
+ overdrive_mask);
+
+ return da9063_buck_set_limit_clear_overdrive(rdev, min_uA,
+ max_uA,
+ overdrive_mask);
+ }
+ return regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
+}
+
+static int da9063_buck_get_current_limit(struct regulator_dev *rdev)
+{
+ struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+ int val, ret, limit;
+ unsigned int mask;
+
+ limit = regulator_get_current_limit_regmap(rdev);
+ if (limit < 0)
+ return limit;
+ mask = da9063_get_overdrive_mask(rdev->desc);
+ if (mask) {
+ ret = regmap_read(regl->hw->regmap, DA9063_REG_CONFIG_H, &val);
+ if (ret < 0)
+ return ret;
+ if (val & mask)
+ limit *= 2;
+ }
+ return limit;
+}
+
static const struct regulator_ops da9063_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@@ -419,8 +547,8 @@ static const struct regulator_ops da9063_buck_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
- .set_current_limit = regulator_set_current_limit_regmap,
- .get_current_limit = regulator_get_current_limit_regmap,
+ .set_current_limit = da9063_buck_set_current_limit,
+ .get_current_limit = da9063_buck_get_current_limit,
.set_mode = da9063_buck_set_mode,
.get_mode = da9063_buck_get_mode,
.get_status = da9063_buck_get_status,