From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenyou Yang Subject: [PATCH v2 5/7] power: act8945a_charger: Add capacity level property Date: Tue, 28 Jun 2016 09:22:48 +0800 Message-ID: <1467076970-12206-6-git-send-email-wenyou.yang@atmel.com> References: <1467076970-12206-1-git-send-email-wenyou.yang@atmel.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1467076970-12206-1-git-send-email-wenyou.yang@atmel.com> Sender: linux-pm-owner@vger.kernel.org To: Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , Mark Brown , Ian Campbell , Kumar Gala Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Nicolas Ferre , linux-pm@vger.kernel.org, Wenyou Yang List-Id: devicetree@vger.kernel.org Add the power supply capacity level property, it corresponds to POWER_SUPPLY_CAPACITY_LEVEL_*. It also utilizes the precision voltage detector function module to catch the low battery voltage. Signed-off-by: Wenyou Yang --- Changes in v2: None drivers/power/act8945a_charger.c | 78 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c index be65e5d..9b79f5e 100644 --- a/drivers/power/act8945a_charger.c +++ b/drivers/power/act8945a_charger.c @@ -83,6 +83,7 @@ struct act8945a_charger { bool init_done; int irq_pin; + int lbo_pin; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -208,11 +209,70 @@ static int act8945a_get_battery_health(struct regmap *regmap, int *val) return 0; } +static int act8945a_get_capacity_level(struct act8945a_charger *charger, + struct regmap *regmap, int *val) +{ + int ret; + unsigned int status, state, config; + int lbo_level = 1; + + if (gpio_is_valid(charger->lbo_pin)) + lbo_level = gpio_get_value(charger->lbo_pin); + + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); + if (ret < 0) + return ret; + + state &= APCH_STATE_CSTATE; + state >>= APCH_STATE_CSTATE_SHIFT; + + switch (state) { + case APCH_STATE_CSTATE_PRE: + *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; + break; + case APCH_STATE_CSTATE_FAST: + if (lbo_level) + *val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; + else + *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; + break; + case APCH_STATE_CSTATE_EOC: + if (status & APCH_STATUS_CHGDAT) + *val = POWER_SUPPLY_CAPACITY_LEVEL_FULL; + else + *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; + break; + case APCH_STATE_CSTATE_DISABLED: + default: + if (config & APCH_CFG_SUSCHG) { + *val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; + } else { + *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; + if (!(status & APCH_STATUS_INDAT)) { + if (!lbo_level) + *val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; + } + } + break; + } + + return 0; +} + static enum power_supply_property act8945a_charger_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER }; @@ -238,6 +298,10 @@ static int act8945a_charger_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_HEALTH: ret = act8945a_get_battery_health(regmap, &val->intval); break; + case POWER_SUPPLY_PROP_CAPACITY_LEVEL: + ret = act8945a_get_capacity_level(charger, + regmap, &val->intval); + break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = act8945a_charger_model; break; @@ -364,6 +428,20 @@ static int act8945a_charger_config(struct device *dev, } } + charger->lbo_pin = of_get_named_gpio(np, "active-semi,lbo-gpios", 0); + if (gpio_is_valid(charger->lbo_pin)) { + if (!devm_gpio_request(dev, charger->lbo_pin, "lbo-detect")) { + ret = devm_request_irq(dev, + gpio_to_irq(charger->lbo_pin), + act8945a_status_changed, + IRQF_TRIGGER_FALLING | + IRQF_TRIGGER_RISING, + "lbo-detect", charger); + if (ret) + dev_dbg(dev, "failed to request LBO pin IRQ\n"); + } + } + chglev_pin = of_get_named_gpio_flags(np, "active-semi,chglev-gpios", 0, &flags); -- 2.7.4