diff options
Diffstat (limited to 'drivers/power/supply/bq24190_charger.c')
| -rw-r--r-- | drivers/power/supply/bq24190_charger.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c index d74c8cce0770..2c404a59e613 100644 --- a/drivers/power/supply/bq24190_charger.c +++ b/drivers/power/supply/bq24190_charger.c @@ -11,10 +11,12 @@ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/delay.h> +#include <linux/extcon.h> #include <linux/of_irq.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/power_supply.h> +#include <linux/workqueue.h> #include <linux/gpio.h> #include <linux/i2c.h> @@ -36,6 +38,8 @@ #define BQ24190_REG_POC_WDT_RESET_SHIFT 6 #define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4)) #define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4 +#define BQ24190_REG_POC_CHG_CONFIG_CHARGE 1 +#define BQ24190_REG_POC_CHG_CONFIG_OTG 2 #define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1)) #define BQ24190_REG_POC_SYS_MIN_SHIFT 1 #define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0) @@ -148,6 +152,9 @@ struct bq24190_dev_info { struct device *dev; struct power_supply *charger; struct power_supply *battery; + struct extcon_dev *extcon; + struct notifier_block extcon_nb; + struct delayed_work extcon_work; char model_name[I2C_NAME_SIZE]; bool initialized; bool irq_event; @@ -164,6 +171,11 @@ struct bq24190_dev_info { * number at that index in the array is the real-world value that it * represents. */ + +/* REG00[2:0] (IINLIM) in uAh */ +static const int bq24190_iinlim_values[] = { + 100000, 150000, 500000, 900000, 1200000, 1500000, 2000000, 3000000 }; + /* REG02[7:2] (ICHG) in uAh */ static const int bq24190_ccc_ichg_values[] = { 512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000, @@ -1277,6 +1289,78 @@ static irqreturn_t bq24190_irq_handler_thread(int irq, void *data) return IRQ_HANDLED; } +static void bq24190_extcon_work(struct work_struct *work) +{ + struct bq24190_dev_info *bdi = + container_of(work, struct bq24190_dev_info, extcon_work.work); + int ret, iinlim = 0; + + ret = pm_runtime_get_sync(bdi->dev); + if (ret < 0) { + dev_err(bdi->dev, "Error getting runtime-pm ref: %d\n", ret); + return; + } + + if (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_SDP) == 1) + iinlim = 500000; + else if (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_CDP) == 1 || + extcon_get_state(bdi->extcon, EXTCON_CHG_USB_ACA) == 1) + iinlim = 1500000; + else if (extcon_get_state(bdi->extcon, EXTCON_CHG_USB_DCP) == 1) + iinlim = 2000000; + + if (iinlim) { + ret = bq24190_set_field_val(bdi, BQ24190_REG_ISC, + BQ24190_REG_ISC_IINLIM_MASK, + BQ24190_REG_ISC_IINLIM_SHIFT, + bq24190_iinlim_values, + ARRAY_SIZE(bq24190_iinlim_values), + iinlim); + if (ret) + dev_err(bdi->dev, "Can't set IINLIM: %d\n", ret); + } + + /* + * If no charger has been detected and host mode is requested, activate + * the 5V boost converter, otherwise deactivate it. + */ + if (!iinlim && extcon_get_state(bdi->extcon, EXTCON_USB_HOST) == 1) { + ret = bq24190_write_mask(bdi, BQ24190_REG_POC, + BQ24190_REG_POC_CHG_CONFIG_MASK, + BQ24190_REG_POC_CHG_CONFIG_SHIFT, + BQ24190_REG_POC_CHG_CONFIG_OTG); + } else { + ret = bq24190_write_mask(bdi, BQ24190_REG_POC, + BQ24190_REG_POC_CHG_CONFIG_MASK, + BQ24190_REG_POC_CHG_CONFIG_SHIFT, + BQ24190_REG_POC_CHG_CONFIG_CHARGE); + } + if (ret) + dev_err(bdi->dev, "Can't set CHG_CONFIG: %d\n", ret); + + pm_runtime_mark_last_busy(bdi->dev); + pm_runtime_put_autosuspend(bdi->dev); +} + +static int bq24190_extcon_event(struct notifier_block *nb, unsigned long event, + void *param) +{ + struct bq24190_dev_info *bdi = + container_of(nb, struct bq24190_dev_info, extcon_nb); + + /* + * The Power-Good detection may take up to 220ms, sometimes + * the external charger detection is quicker, and the bq24190 will + * reset to iinlim based on its own charger detection (which is not + * hooked up when using external charger detection) resulting in + * a too low default 500mA iinlim. Delay applying the extcon value + * for 300ms to avoid this. + */ + queue_delayed_work(system_wq, &bdi->extcon_work, msecs_to_jiffies(300)); + + return NOTIFY_OK; +} + static int bq24190_hw_init(struct bq24190_dev_info *bdi) { u8 v; @@ -1314,6 +1398,7 @@ static int bq24190_probe(struct i2c_client *client, struct device *dev = &client->dev; struct power_supply_config charger_cfg = {}, battery_cfg = {}; struct bq24190_dev_info *bdi; + const char *name; int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { @@ -1341,6 +1426,18 @@ static int bq24190_probe(struct i2c_client *client, return -EINVAL; } + /* + * The extcon-name property is purely an in kernel interface for + * x86/ACPI use, DT platforms should get extcon via phandle. + */ + if (device_property_read_string(dev, "extcon-name", &name) == 0) { + bdi->extcon = extcon_get_extcon_dev(name); + if (!bdi->extcon) + return -EPROBE_DEFER; + + dev_info(bdi->dev, "using extcon device %s\n", name); + } + pm_runtime_enable(dev); pm_runtime_use_autosuspend(dev); pm_runtime_set_autosuspend_delay(dev, 600); @@ -1391,6 +1488,18 @@ static int bq24190_probe(struct i2c_client *client, goto out5; } + if (bdi->extcon) { + INIT_DELAYED_WORK(&bdi->extcon_work, bq24190_extcon_work); + bdi->extcon_nb.notifier_call = bq24190_extcon_event; + ret = devm_extcon_register_notifier(dev, bdi->extcon, -1, + &bdi->extcon_nb); + if (ret) + goto out5; + + /* Sync initial cable state */ + queue_delayed_work(system_wq, &bdi->extcon_work, 0); + } + enable_irq_wake(client->irq); pm_runtime_mark_last_busy(dev); |