From patchwork Mon Aug 22 06:49:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 9293065 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BBDC4607F0 for ; Mon, 22 Aug 2016 06:55:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA4FC28563 for ; Mon, 22 Aug 2016 06:55:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9ECA428807; Mon, 22 Aug 2016 06:55:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F2A3728563 for ; Mon, 22 Aug 2016 06:55:45 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bbj7h-0006zO-Gg; Mon, 22 Aug 2016 06:54:17 +0000 Received: from eusmtp01.atmel.com ([212.144.249.243]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bbj6e-0005bc-1H for linux-arm-kernel@lists.infradead.org; Mon, 22 Aug 2016 06:53:18 +0000 Received: from apsmtp01.atmel.com (10.168.254.31) by eusmtp01.atmel.com (10.145.145.31) with Microsoft SMTP Server id 14.3.235.1; Mon, 22 Aug 2016 08:52:53 +0200 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.atmel.com (10.168.254.31) with Microsoft SMTP Server id 14.3.235.1; Mon, 22 Aug 2016 14:59:16 +0800 From: Wenyou Yang To: Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , Mark Brown , Ian Campbell , "Kumar Gala" Subject: [PATCH v7 5/7] power: act8945a_charger: Add capacity level property Date: Mon, 22 Aug 2016 14:49:15 +0800 Message-ID: <1471848557-27278-6-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1471848557-27278-1-git-send-email-wenyou.yang@atmel.com> References: <1471848557-27278-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160821_235312_904162_2B81891A X-CRM114-Status: GOOD ( 18.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org, Nicolas Ferre , linux-kernel@vger.kernel.org, Wenyou Yang , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 v7: - For "lbo-gpios", use gpiod_get() to fix devm_gpiod_get() wrong use with parent device as *dev argument. - Add the handle -EPROBE_DEFER returned from gpiod_get "lbo-gpios". - Use dev_info() to print log if the lbo irq request failed. - Remove unneeded semicolon. - Add depends on GPIOLIB for use gpiod. Changes in v6: - For "lbo-gpios", use gpiod API instead of old gpio API to handle. Changes in v5: None Changes in v4: - Change devname of devm_request_irq() from "lbo-detect" to "act8945a, lbo-detect". Changes in v3: None Changes in v2: None drivers/power/supply/Kconfig | 2 +- drivers/power/supply/act8945a_charger.c | 110 +++++++++++++++++++++++++++++--- 2 files changed, 102 insertions(+), 10 deletions(-) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 76806a0..a983de2 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -77,7 +77,7 @@ config BATTERY_88PM860X config BATTERY_ACT8945A tristate "Active-semi ACT8945A charger driver" - depends on MFD_ACT8945A || COMPILE_TEST + depends on MFD_ACT8945A || GPIOLIB || COMPILE_TEST help Say Y here to enable support for power supply provided by Active-semi ActivePath ACT8945A charger. diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c index 3536b67..cc79abe 100644 --- a/drivers/power/supply/act8945a_charger.c +++ b/drivers/power/supply/act8945a_charger.c @@ -18,6 +18,7 @@ #include #include #include +#include static const char *act8945a_charger_model = "ACT8945A"; static const char *act8945a_charger_manufacturer = "Active-semi"; @@ -83,6 +84,7 @@ struct act8945a_charger { struct work_struct work; bool init_done; + struct gpio_desc *lbo_gpio; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -208,11 +210,67 @@ 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 = gpiod_get_value(charger->lbo_gpio); + + 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 +296,10 @@ 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; @@ -327,7 +389,7 @@ static irqreturn_t act8945a_status_changed(int irq, void *dev_id) static int act8945a_charger_config(struct device *dev, struct act8945a_charger *charger) { - struct device_node *np = dev->of_node; + struct device_node *np = dev->parent->of_node; enum of_gpio_flags flags; struct regmap *regmap = charger->regmap; @@ -354,6 +416,21 @@ static int act8945a_charger_config(struct device *dev, dev_info(dev, "have been suspended\n"); } + charger->lbo_gpio = gpiod_get(dev->parent, "active-semi,lbo", GPIOD_IN); + if (PTR_ERR(charger->lbo_gpio) == -EPROBE_DEFER) { + dev_info(dev, "probe retry requested for gpio \"lbo\"\n"); + } else if (IS_ERR(charger->lbo_gpio)) { + dev_err(dev, "unable to claim gpio \"lbo\"\n"); + charger->lbo_gpio = NULL; + } + + ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio), + act8945a_status_changed, + (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING), + "act8945a_lbo_detect", charger); + if (ret) + dev_info(dev, "failed to request gpio \"lbo\" IRQ\n"); + chglev_pin = of_get_named_gpio_flags(np, "active-semi,chglev-gpios", 0, &flags); @@ -443,14 +520,15 @@ static int act8945a_charger_probe(struct platform_device *pdev) return -EINVAL; } - ret = act8945a_charger_config(pdev->dev.parent, charger); + ret = act8945a_charger_config(&pdev->dev, charger); if (ret) return ret; irq = of_irq_get(pdev->dev.parent->of_node, 0); if (irq == -EPROBE_DEFER) { dev_err(&pdev->dev, "failed to find IRQ number\n"); - return -EPROBE_DEFER; + ret = -EPROBE_DEFER; + goto fail; } ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed, @@ -458,7 +536,7 @@ static int act8945a_charger_probe(struct platform_device *pdev) charger); if (ret) { dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n"); - return ret; + goto fail; } charger->desc.name = "act8945a-charger"; @@ -467,8 +545,10 @@ static int act8945a_charger_probe(struct platform_device *pdev) charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props); ret = act8945a_set_supply_type(charger, &charger->desc.type); - if (ret) - return -EINVAL; + if (ret) { + ret = -EINVAL; + goto fail; + } psy_cfg.of_node = pdev->dev.parent->of_node; psy_cfg.drv_data = charger; @@ -478,7 +558,8 @@ static int act8945a_charger_probe(struct platform_device *pdev) &psy_cfg); if (IS_ERR(charger->psy)) { dev_err(&pdev->dev, "failed to register power supply\n"); - return PTR_ERR(charger->psy); + ret = PTR_ERR(charger->psy); + goto fail; } platform_set_drvdata(pdev, charger); @@ -486,12 +567,20 @@ static int act8945a_charger_probe(struct platform_device *pdev) INIT_WORK(&charger->work, act8945a_work); ret = act8945a_enable_interrupt(charger); - if (ret) - return -EIO; + if (ret) { + ret = -EIO; + goto fail; + } charger->init_done = true; return 0; + +fail: + if (charger->lbo_gpio) + gpiod_put(charger->lbo_gpio); + + return ret; } static int act8945a_charger_remove(struct platform_device *pdev) @@ -501,6 +590,9 @@ static int act8945a_charger_remove(struct platform_device *pdev) charger->init_done = false; cancel_work_sync(&charger->work); + if (charger->lbo_gpio) + gpiod_put(charger->lbo_gpio); + return 0; }