diff options
Diffstat (limited to 'drivers/regulator/max8998.c')
| -rw-r--r-- | drivers/regulator/max8998.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c index 60599c3bb845..340413bba0c5 100644 --- a/drivers/regulator/max8998.c +++ b/drivers/regulator/max8998.c @@ -33,6 +33,10 @@ struct max8998_data { unsigned int buck2_idx; }; +static const unsigned int charger_current_table[] = { + 90000, 380000, 475000, 550000, 570000, 600000, 700000, 800000, +}; + static int max8998_get_enable_register(struct regulator_dev *rdev, int *reg, int *shift) { @@ -63,6 +67,10 @@ static int max8998_get_enable_register(struct regulator_dev *rdev, *reg = MAX8998_REG_CHGR2; *shift = 7 - (ldo - MAX8998_ESAFEOUT1); break; + case MAX8998_CHARGER: + *reg = MAX8998_REG_CHGR2; + *shift = 0; + break; default: return -EINVAL; } @@ -88,6 +96,11 @@ static int max8998_ldo_is_enabled(struct regulator_dev *rdev) return val & (1 << shift); } +static int max8998_ldo_is_enabled_inverted(struct regulator_dev *rdev) +{ + return (!max8998_ldo_is_enabled(rdev)); +} + static int max8998_ldo_enable(struct regulator_dev *rdev) { struct max8998_data *max8998 = rdev_get_drvdata(rdev); @@ -358,6 +371,74 @@ static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, return 0; } +static int max8998_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + unsigned int n_currents = rdev->desc->n_current_limits; + int i, sel = -1; + + if (n_currents == 0) + return -EINVAL; + + if (rdev->desc->curr_table) { + const unsigned int *curr_table = rdev->desc->curr_table; + bool ascend = curr_table[n_currents - 1] > curr_table[0]; + + /* search for closest to maximum */ + if (ascend) { + for (i = n_currents - 1; i >= 0; i--) { + if (min_uA <= curr_table[i] && + curr_table[i] <= max_uA) { + sel = i; + break; + } + } + } else { + for (i = 0; i < n_currents; i++) { + if (min_uA <= curr_table[i] && + curr_table[i] <= max_uA) { + sel = i; + break; + } + } + } + } + + if (sel < 0) + return -EINVAL; + + sel <<= ffs(rdev->desc->csel_mask) - 1; + + return max8998_update_reg(i2c, rdev->desc->csel_reg, + sel, rdev->desc->csel_mask); +} + +int max8998_get_current_limit(struct regulator_dev *rdev) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + u8 val; + int ret; + + ret = max8998_read_reg(i2c, rdev->desc->csel_reg, &val); + if (ret != 0) + return ret; + + val &= rdev->desc->csel_mask; + val >>= ffs(rdev->desc->csel_mask) - 1; + + if (rdev->desc->curr_table) { + if (val >= rdev->desc->n_current_limits) + return -EINVAL; + + return rdev->desc->curr_table[val]; + } + + return -EINVAL; +} + static const struct regulator_ops max8998_ldo_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, @@ -379,6 +460,15 @@ static const struct regulator_ops max8998_buck_ops = { .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, }; +static const struct regulator_ops max8998_charger_ops = { + .set_current_limit = max8998_set_current_limit, + .get_current_limit = max8998_get_current_limit, + .is_enabled = max8998_ldo_is_enabled_inverted, + /* Swapped as register is inverted */ + .enable = max8998_ldo_disable, + .disable = max8998_ldo_enable, +}; + static const struct regulator_ops max8998_others_ops = { .is_enabled = max8998_ldo_is_enabled, .enable = max8998_ldo_enable, @@ -397,6 +487,19 @@ static const struct regulator_ops max8998_others_ops = { .owner = THIS_MODULE, \ } +#define MAX8998_CURRENT_REG(_name, _ops, _table, _reg, _mask) \ + { \ + .name = #_name, \ + .id = MAX8998_##_name, \ + .ops = _ops, \ + .curr_table = _table, \ + .n_current_limits = ARRAY_SIZE(_table), \ + .csel_reg = _reg, \ + .csel_mask = _mask, \ + .type = REGULATOR_CURRENT, \ + .owner = THIS_MODULE, \ + } + #define MAX8998_OTHERS_REG(_name, _id) \ { \ .name = #_name, \ @@ -432,6 +535,8 @@ static const struct regulator_desc regulators[] = { MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG), MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1), MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2), + MAX8998_CURRENT_REG(CHARGER, &max8998_charger_ops, + charger_current_table, MAX8998_REG_CHGR1, 0x7), }; static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, |