diff options
Diffstat (limited to 'drivers/power/supply/axp20x_battery.c')
| -rw-r--r-- | drivers/power/supply/axp20x_battery.c | 88 |
1 files changed, 80 insertions, 8 deletions
diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c index 5d29b2eab8fc..7494f0f0eadb 100644 --- a/drivers/power/supply/axp20x_battery.c +++ b/drivers/power/supply/axp20x_battery.c @@ -60,6 +60,8 @@ struct axp20x_batt_ps { struct iio_channel *batt_chrg_i; struct iio_channel *batt_dischrg_i; struct iio_channel *batt_v; + /* Maximum constant charge current */ + unsigned int max_ccc; u8 axp_id; }; @@ -129,6 +131,14 @@ static void raw_to_constant_charge_current(struct axp20x_batt_ps *axp, int *val) *val = *val * 150000 + 300000; } +static void constant_charge_current_to_raw(struct axp20x_batt_ps *axp, int *val) +{ + if (axp->axp_id == AXP209_ID) + *val = (*val - 300000) / 100000; + else + *val = (*val - 300000) / 150000; +} + static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp, int *val) { @@ -221,9 +231,7 @@ static int axp20x_battery_get_prop(struct power_supply *psy, break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: - val->intval = AXP20X_CHRG_CTRL1_TGT_CURR; - raw_to_constant_charge_current(axp20x_batt, &val->intval); - + val->intval = axp20x_batt->max_ccc; break; case POWER_SUPPLY_PROP_CURRENT_NOW: @@ -340,10 +348,10 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt, static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt, int charge_current) { - if (axp_batt->axp_id == AXP209_ID) - charge_current = (charge_current - 300000) / 100000; - else - charge_current = (charge_current - 300000) / 150000; + if (charge_current > axp_batt->max_ccc) + return -EINVAL; + + constant_charge_current_to_raw(axp_batt, &charge_current); if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0) return -EINVAL; @@ -352,6 +360,36 @@ static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt, AXP20X_CHRG_CTRL1_TGT_CURR, charge_current); } +static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp, + int charge_current) +{ + bool lower_max = false; + + constant_charge_current_to_raw(axp, &charge_current); + + if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0) + return -EINVAL; + + raw_to_constant_charge_current(axp, &charge_current); + + if (charge_current > axp->max_ccc) + dev_warn(axp->dev, + "Setting max constant charge current higher than previously defined. Note that increasing the constant charge current may damage your battery.\n"); + else + lower_max = true; + + axp->max_ccc = charge_current; + + if (lower_max) { + int current_cc; + + axp20x_get_constant_charge_current(axp, ¤t_cc); + if (current_cc > charge_current) + axp20x_set_constant_charge_current(axp, charge_current); + } + + return 0; +} static int axp20x_set_voltage_min_design(struct axp20x_batt_ps *axp_batt, int min_voltage) { @@ -380,6 +418,9 @@ static int axp20x_battery_set_prop(struct power_supply *psy, case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: return axp20x_set_constant_charge_current(axp20x_batt, val->intval); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + return axp20x_set_max_constant_charge_current(axp20x_batt, + val->intval); default: return -EINVAL; @@ -405,7 +446,8 @@ static int axp20x_battery_prop_writeable(struct power_supply *psy, { return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN || psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN || - psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT; + psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT || + psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX; } static const struct power_supply_desc axp20x_batt_ps_desc = { @@ -433,6 +475,7 @@ static int axp20x_power_probe(struct platform_device *pdev) { struct axp20x_batt_ps *axp20x_batt; struct power_supply_config psy_cfg = {}; + struct power_supply_battery_info info; if (!of_device_is_available(pdev->dev.of_node)) return -ENODEV; @@ -484,6 +527,35 @@ static int axp20x_power_probe(struct platform_device *pdev) return PTR_ERR(axp20x_batt->batt); } + if (!power_supply_get_battery_info(axp20x_batt->batt, &info)) { + int vmin = info.voltage_min_design_uv; + int ccc = info.constant_charge_current_max_ua; + + if (vmin > 0 && axp20x_set_voltage_min_design(axp20x_batt, + vmin)) + dev_err(&pdev->dev, + "couldn't set voltage_min_design\n"); + + /* Set max to unverified value to be able to set CCC */ + axp20x_batt->max_ccc = ccc; + + if (ccc <= 0 || axp20x_set_constant_charge_current(axp20x_batt, + ccc)) { + dev_err(&pdev->dev, + "couldn't set constant charge current from DT: fallback to minimum value\n"); + ccc = 300000; + axp20x_batt->max_ccc = ccc; + axp20x_set_constant_charge_current(axp20x_batt, ccc); + } + } + + /* + * Update max CCC to a valid value if battery info is present or set it + * to current register value by default. + */ + axp20x_get_constant_charge_current(axp20x_batt, + &axp20x_batt->max_ccc); + return 0; } |