Add the charger status change interrupt support, it will report the power supply changed event. This interrupt is generated by one of the conditions as below: - the state machine jumps out of or into the EOC state - the CHGIN input voltage goes out of or into the valid range. - the battery temperature goes out of or into the valid range. - the PRECHARGE time-out occurs. - the total charge time-out occurs. Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx> --- Changes in v2: None drivers/power/act8945a_charger.c | 78 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 72 insertions(+), 6 deletions(-) diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c index c680a40..0c61b28 100644 --- a/drivers/power/act8945a_charger.c +++ b/drivers/power/act8945a_charger.c @@ -10,6 +10,7 @@ * published by the Free Software Foundation. * */ +#include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> @@ -75,7 +76,12 @@ static const char *act8945a_charger_manufacturer = "Active-semi"; #define APCH_STATE_CSTATE_PRE 0x03 struct act8945a_charger { + struct power_supply *psy; struct regmap *regmap; + struct work_struct work; + + bool init_done; + int irq_pin; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -252,6 +258,47 @@ static const struct power_supply_desc act8945a_charger_desc = { .num_properties = ARRAY_SIZE(act8945a_charger_props), }; +static int act8945a_enable_interrupt(struct act8945a_charger *charger) +{ + struct regmap *regmap = charger->regmap; + unsigned char ctrl; + int ret; + + ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN | + APCH_CTRL_INDIS | APCH_CTRL_INCON | + APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN | + APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT; + ret = regmap_write(regmap, ACT8945A_APCH_CTRL, ctrl); + if (ret) + return ret; + + ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT | + APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT; + ret = regmap_write(regmap, ACT8945A_APCH_STATUS, ctrl); + if (ret) + return ret; + + return 0; +} + +static void act8945a_work(struct work_struct *work) +{ + struct act8945a_charger *charger = + container_of(work, struct act8945a_charger, work); + + power_supply_changed(charger->psy); +} + +static irqreturn_t act8945a_status_changed(int irq, void *dev_id) +{ + struct act8945a_charger *charger = dev_id; + + if (charger->init_done) + schedule_work(&charger->work); + + return IRQ_HANDLED; +} + #define DEFAULT_TOTAL_TIME_OUT 3 #define DEFAULT_PRE_TIME_OUT 40 #define DEFAULT_INPUT_OVP_THRESHOLD 6600 @@ -283,6 +330,18 @@ static int act8945a_charger_config(struct device *dev, if (tmp & APCH_CFG_SUSCHG) value |= APCH_CFG_SUSCHG; + charger->irq_pin = of_get_named_gpio(np, "active-semi,irq_gpios", 0); + if (gpio_is_valid(charger->irq_pin)) { + if (!devm_gpio_request(dev, charger->irq_pin, "irq-pin")) { + ret = devm_request_irq(dev, + gpio_to_irq(charger->irq_pin), + act8945a_status_changed, + IRQF_TRIGGER_FALLING, + "irq-pin", charger); + if (ret) + dev_dbg(dev, "failed to request nIRQ pin IRQ\n"); + } + } chglev_pin = of_get_named_gpio_flags(np, "active-semi,chglev-gpios", 0, &flags); @@ -360,7 +419,6 @@ static int act8945a_charger_config(struct device *dev, static int act8945a_charger_probe(struct platform_device *pdev) { struct act8945a_charger *charger; - struct power_supply *psy; struct power_supply_config psy_cfg = {}; int ret; @@ -381,14 +439,22 @@ static int act8945a_charger_probe(struct platform_device *pdev) psy_cfg.of_node = pdev->dev.parent->of_node; psy_cfg.drv_data = charger; - psy = devm_power_supply_register(&pdev->dev, - &act8945a_charger_desc, - &psy_cfg); - if (IS_ERR(psy)) { + charger->psy = devm_power_supply_register(&pdev->dev, + &act8945a_charger_desc, + &psy_cfg); + if (IS_ERR(charger->psy)) { dev_err(&pdev->dev, "failed to register power supply\n"); - return PTR_ERR(psy); + return PTR_ERR(charger->psy); } + INIT_WORK(&charger->work, act8945a_work); + + ret = act8945a_enable_interrupt(charger); + if (ret) + return -EIO; + + charger->init_done = true; + return 0; } -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html