diff options
| author | Chaitanya Bandi <bandik@nvidia.com> | 2014-03-14 12:28:28 +0530 |
|---|---|---|
| committer | Laxman Dewangan <ldewangan@nvidia.com> | 2014-03-19 04:31:28 -0700 |
| commit | 1bdbb13c6d5fa19d3b94c2274ade03b7deb815bb (patch) | |
| tree | 6931eb588bba8e28d97b535abe4108ccf1a68c14 /drivers/power | |
| parent | ecd7ce39e52296a1a9094af05311528749199c8d (diff) | |
power: bq2477x: Add adapter detection through GPIO
Added support for AC adapter detection through GPIO
in bq2477x charger.
Bug 1457299
Change-Id: I344d264312142121342403194aa5adeaec66d47d
Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
Reviewed-on: http://git-master/r/380285
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/bq2477x-charger.c | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/drivers/power/bq2477x-charger.c b/drivers/power/bq2477x-charger.c index 14e74cef142f..04b767392753 100644 --- a/drivers/power/bq2477x-charger.c +++ b/drivers/power/bq2477x-charger.c @@ -40,6 +40,8 @@ #include <linux/rtc.h> #include <linux/alarmtimer.h> #include <linux/sched/rt.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> struct bq2477x_chip { struct device *dev; @@ -48,6 +50,8 @@ struct bq2477x_chip { struct regmap *regmap_word; struct mutex mutex; int irq; + int charger_detect_gpio; + int charger_detect_gpio_active_low; int ac_online; int dac_ichg; int dac_v; @@ -281,6 +285,29 @@ static void of_bq2477x_parse_platform_data(struct i2c_client *client, else dev_warn(&client->dev, "wdt-refresh-timeout not provided\n"); + ret = of_property_read_u32(np, "ti,charger-detect-gpio-active-low", &pval); + if (!ret) + pdata->charger_detect_gpio_active_low = pval; + else + dev_warn(&client->dev, "charger_detect_gpio_active_low not provided\n"); + + pdata->charger_detect_gpio = of_get_named_gpio(np, "charger-detect-gpio", 0); + if (pdata->charger_detect_gpio < 0) + dev_warn(&client->dev, "invalid pdata->charger_detect_gpio\n"); +} + +static irqreturn_t bq2477x_charger_detect_irq(int irq, void *data) +{ + struct bq2477x_chip *bq2477x = data; + bq2477x->ac_online = + gpio_get_value_cansleep(bq2477x->charger_detect_gpio); + bq2477x->ac_online ^= bq2477x->charger_detect_gpio_active_low; + + if (bq2477x->ac_online == 1) + bq2477x_hw_init(bq2477x); + + power_supply_changed(&bq2477x->ac); + return IRQ_HANDLED; } static int bq2477x_probe(struct i2c_client *client, @@ -317,9 +344,11 @@ static int bq2477x_probe(struct i2c_client *client, bq2477x->dac_minsv = pdata->dac_minsv; bq2477x->dac_iin = pdata->dac_iin; bq2477x->wdt_refresh_timeout = pdata->wdt_refresh_timeout; + bq2477x->charger_detect_gpio = pdata->charger_detect_gpio; + bq2477x->charger_detect_gpio_active_low = + pdata->charger_detect_gpio_active_low; i2c_set_clientdata(client, bq2477x); - bq2477x->irq = client->irq; mutex_init(&bq2477x->mutex); bq2477x->ac_online = 0; @@ -359,6 +388,31 @@ static int bq2477x_probe(struct i2c_client *client, return ret; } + if (gpio_is_valid(bq2477x->charger_detect_gpio)) { + ret = devm_gpio_request_one(bq2477x->dev, + bq2477x->charger_detect_gpio, GPIOF_IN, + "bq2477x-charger-detect"); + if (ret) { + dev_err(bq2477x->dev, "gpio request failed %d\n", ret); + goto psy_err; + } + + bq2477x->irq = gpio_to_irq(bq2477x->charger_detect_gpio); + bq2477x->ac_online = + gpio_get_value_cansleep(bq2477x->charger_detect_gpio); + bq2477x->ac_online ^= bq2477x->charger_detect_gpio_active_low; + + ret = devm_request_threaded_irq(bq2477x->dev, bq2477x->irq, + NULL, bq2477x_charger_detect_irq, + IRQF_ONESHOT | IRQF_TRIGGER_RISING + | IRQF_TRIGGER_FALLING, dev_name(bq2477x->dev), + bq2477x); + if (ret < 0) { + dev_err(bq2477x->dev, "Failed to request irq %d\n", ret); + goto psy_err; + } + } + ret = bq2477x_hw_init(bq2477x); if (ret < 0) { dev_err(bq2477x->dev, "Hardware init failed %d\n", ret); |