diff options
| -rw-r--r-- | drivers/power/supply/smb347-charger.c | 151 |
1 files changed, 137 insertions, 14 deletions
diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c index 60894105fcbd..da2c337107bf 100644 --- a/drivers/power/supply/smb347-charger.c +++ b/drivers/power/supply/smb347-charger.c @@ -1180,6 +1180,119 @@ static bool smb347_readable_reg(struct device *dev, unsigned int reg) return smb347_volatile_reg(dev, reg); } +static void smb347_dt_parse_pdata(struct device_node *np, + struct smb347_charger_platform_data *pdata) +{ + pdata->soft_temp_limit_compensation = + SMB347_SOFT_TEMP_COMPENSATE_DEFAULT; + /* + * These properties come from the battery info, still we need to + * pre-initialize the values. See smb347_get_battery_info() below. + */ + pdata->soft_cold_temp_limit = SMB347_TEMP_USE_DEFAULT; + pdata->hard_cold_temp_limit = SMB347_TEMP_USE_DEFAULT; + pdata->soft_hot_temp_limit = SMB347_TEMP_USE_DEFAULT; + pdata->hard_hot_temp_limit = SMB347_TEMP_USE_DEFAULT; + + /* Charging constraints */ + of_property_read_u32(np, "summit,fast-voltage-threshold-microvolt", + &pdata->pre_to_fast_voltage); + of_property_read_u32(np, "summit,mains-current-limit-microamp", + &pdata->mains_current_limit); + of_property_read_u32(np, "summit,usb-current-limit-microamp", + &pdata->usb_hc_current_limit); + + /* For thermometer monitoring */ + of_property_read_u32(np, "summit,chip-temperature-threshold-celsius", + &pdata->chip_temp_threshold); + of_property_read_u32(np, "summit,soft-compensation-method", + &pdata->soft_temp_limit_compensation); + of_property_read_u32(np, "summit,charge-current-compensation-microamp", + &pdata->charge_current_compensation); + + /* Supported charging mode */ + pdata->use_mains = + of_property_read_bool(np, "summit,enable-mains-charging"); + pdata->use_usb = + of_property_read_bool(np, "summit,enable-usb-charging"); + pdata->use_usb_otg = + of_property_read_bool(np, "summit,enable-otg-charging"); + + /* Select charging control */ + of_property_read_u32(np, "summit,enable-charge-control", + &pdata->enable_control); + + /* Interrupt support is optional */ + if (!of_find_property(np, "interrupts", NULL)) + pdata->irq_gpio = -1; +} + +static int smb347_get_battery_info(struct smb347_charger *smb) +{ + struct smb347_charger_platform_data *pdata = (void *)smb->pdata; + struct power_supply_battery_info info = {}; + struct power_supply *supply; + int err; + + if (smb->mains) + supply = smb->mains; + else + supply = smb->usb; + + err = power_supply_get_battery_info(supply, &info); + if (err == -ENXIO || err == -ENODEV) + return 0; + if (err) + return err; + + if (info.constant_charge_current_max_ua != -EINVAL) + pdata->max_charge_current = info.constant_charge_current_max_ua; + + if (info.constant_charge_voltage_max_uv != -EINVAL) + pdata->max_charge_voltage = info.constant_charge_voltage_max_uv; + + if (info.precharge_current_ua != -EINVAL) + pdata->pre_charge_current = info.precharge_current_ua; + + if (info.charge_term_current_ua != -EINVAL) + pdata->termination_current = info.charge_term_current_ua; + + if (info.temp_alert_min != INT_MIN) + pdata->soft_cold_temp_limit = info.temp_alert_min; + + if (info.temp_alert_max != INT_MAX) + pdata->soft_hot_temp_limit = info.temp_alert_max; + + if (info.temp_min != INT_MIN) + pdata->hard_cold_temp_limit = info.temp_min; + + if (info.temp_max != INT_MAX) + pdata->hard_hot_temp_limit = info.temp_max; + + /* Suspend when battery temperature is outside hard limits */ + if (pdata->hard_cold_temp_limit != SMB347_TEMP_USE_DEFAULT || + pdata->hard_hot_temp_limit != SMB347_TEMP_USE_DEFAULT) + pdata->suspend_on_hard_temp_limit = true; + + return 0; +} + +static struct smb347_charger_platform_data + *smb347_get_platdata(struct device *dev) +{ + struct smb347_charger_platform_data *pdata; + + if (dev->of_node) { + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (pdata) + smb347_dt_parse_pdata(dev->of_node, pdata); + } else { + pdata = dev_get_platdata(dev); + } + + return pdata; +} + static const struct regmap_config smb347_regmap = { .reg_bits = 8, .val_bits = 8, @@ -1216,40 +1329,35 @@ static int smb347_probe(struct i2c_client *client, const struct i2c_device_id *id) { static char *battery[] = { "smb347-battery" }; - const struct smb347_charger_platform_data *pdata; struct power_supply_config mains_usb_cfg = {}, battery_cfg = {}; struct device *dev = &client->dev; struct smb347_charger *smb; int ret; - pdata = dev->platform_data; - if (!pdata) - return -EINVAL; - - if (!pdata->use_mains && !pdata->use_usb) - return -EINVAL; - smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL); if (!smb) return -ENOMEM; + smb->pdata = smb347_get_platdata(dev); + if (!smb->pdata) + return -ENODEV; + + if (!smb->pdata->use_mains && !smb->pdata->use_usb) + return -EINVAL; + i2c_set_clientdata(client, smb); mutex_init(&smb->lock); smb->dev = &client->dev; - smb->pdata = pdata; smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap); if (IS_ERR(smb->regmap)) return PTR_ERR(smb->regmap); - ret = smb347_hw_init(smb); - if (ret < 0) - return ret; - mains_usb_cfg.supplied_to = battery; mains_usb_cfg.num_supplicants = ARRAY_SIZE(battery); mains_usb_cfg.drv_data = smb; + mains_usb_cfg.of_node = dev->of_node; if (smb->pdata->use_mains) { smb->mains = devm_power_supply_register(dev, &smb347_mains_desc, &mains_usb_cfg); @@ -1270,11 +1378,19 @@ static int smb347_probe(struct i2c_client *client, if (IS_ERR(smb->battery)) return PTR_ERR(smb->battery); + ret = smb347_get_battery_info(smb); + if (ret) + return ret; + + ret = smb347_hw_init(smb); + if (ret < 0) + return ret; + /* * Interrupt pin is optional. If it is connected, we setup the * interrupt support here. */ - if (pdata->irq_gpio >= 0) { + if (smb->pdata->irq_gpio >= 0) { ret = smb347_irq_init(smb, client); if (ret < 0) { dev_warn(dev, "failed to initialize IRQ: %d\n", ret); @@ -1302,9 +1418,16 @@ static const struct i2c_device_id smb347_id[] = { }; MODULE_DEVICE_TABLE(i2c, smb347_id); +static const struct of_device_id smb3xx_of_match[] = { + { .compatible = "summit,smb347" }, + { }, +}; +MODULE_DEVICE_TABLE(of, smb3xx_of_match); + static struct i2c_driver smb347_driver = { .driver = { .name = "smb347", + .of_match_table = smb3xx_of_match, }, .probe = smb347_probe, .remove = smb347_remove, |