From patchwork Tue Nov 5 05:42:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matheus Castello X-Patchwork-Id: 11226955 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C192B13BD for ; Tue, 5 Nov 2019 06:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 95B9D217F5 for ; Tue, 5 Nov 2019 06:03:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=castello.eng.br header.i=@castello.eng.br header.b="rDqV+kXj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726697AbfKEGDF (ORCPT ); Tue, 5 Nov 2019 01:03:05 -0500 Received: from gateway21.websitewelcome.com ([192.185.45.133]:43350 "EHLO gateway21.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730152AbfKEGDE (ORCPT ); Tue, 5 Nov 2019 01:03:04 -0500 X-Greylist: delayed 1228 seconds by postgrey-1.27 at vger.kernel.org; Tue, 05 Nov 2019 01:03:04 EST Received: from cm13.websitewelcome.com (cm13.websitewelcome.com [100.42.49.6]) by gateway21.websitewelcome.com (Postfix) with ESMTP id BBCA1400CC65F for ; Mon, 4 Nov 2019 23:42:36 -0600 (CST) Received: from br164.hostgator.com.br ([192.185.176.180]) by cmsmtp with SMTP id RrbwiASWB3Qi0RrbwiW9gJ; Mon, 04 Nov 2019 23:42:36 -0600 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=castello.eng.br; s=default; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=lizOfj4n1A6GoFXXwE/W8Ky+XvCip5rrvcCbBwrCoBA=; b=rDqV+kXjbn94eip2zIJ1XvfaTp ehdMTbbbBXnapXd3AsL6od4lpkWgZqu2MuUVdiJcI1RZ47Q3IHNu35RvlYL1JE3GuHw+28jKoIEOL IiMf1T3/4obcWY3Snaf1N+o9/o27uvlz+d/twDTsVGN4YirucF3vMtt8P8Dt/X/tg1WYTOqxpxj6q JwRan1UeoXD/K4BJDKLpFvoDtI/eO+NwXeweEAgYUOb3P46JO1syU/Bg5sjUNQeV5aj4Ta0IOdhJo Hqxy92PQwldKD/mPxMB3kxENwb0d/53F6KJrf2nrHRwQywok3J0UmEovADRz+Adm+n3G9UxtmV8rb HROocdcA==; Received: from [191.31.196.28] (port=37450 helo=castello.castello) by br164.hostgator.com.br with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.92) (envelope-from ) id 1iRrbv-002sjK-Ur; Tue, 05 Nov 2019 02:42:36 -0300 From: Matheus Castello To: sre@kernel.org, krzk@kernel.org, robh+dt@kernel.org Cc: mark.rutland@arm.com, cw00.choi@samsung.com, b.zolnierkie@samsung.com, lee.jones@linaro.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Matheus Castello Subject: [PATCH v5 4/5] power: supply: max17040: Config alert SOC low level threshold from FDT Date: Tue, 5 Nov 2019 02:42:17 -0300 Message-Id: <20191105054218.29826-5-matheus@castello.eng.br> X-Mailer: git-send-email 2.24.0.rc2 In-Reply-To: <20191105054218.29826-1-matheus@castello.eng.br> References: <20191105015827.GA332@bogus> <20191105054218.29826-1-matheus@castello.eng.br> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - br164.hostgator.com.br X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - castello.eng.br X-BWhitelist: no X-Source-IP: 191.31.196.28 X-Source-L: No X-Exim-ID: 1iRrbv-002sjK-Ur X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (castello.castello) [191.31.196.28]:37450 X-Source-Auth: matheus@castello.eng.br X-Email-Count: 62 X-Source-Cap: Y2FzdGUyNDg7Y2FzdGUyNDg7YnIxNjQuaG9zdGdhdG9yLmNvbS5icg== X-Local-Domain: yes Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For configuration of fuel gauge alert for a low level state of charge interrupt we add a function to config level threshold and a device tree binding property to set it in flatned device tree node. Now we can use "maxim,alert-low-soc-level" property with the values from 1% up to 32% to configure alert interrupt threshold. Signed-off-by: Matheus Castello --- drivers/power/supply/max17040_battery.c | 96 +++++++++++++++++++++---- 1 file changed, 82 insertions(+), 14 deletions(-) -- 2.24.0.rc2 diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 75459f76d02c..c48a691cbd7b 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -29,6 +29,9 @@ #define MAX17040_DELAY 1000 #define MAX17040_BATTERY_FULL 95 +#define MAX17040_ATHD_MASK 0xFFC0 +#define MAX17040_ATHD_DEFAULT_POWER_UP 4 + struct max17040_chip { struct i2c_client *client; struct delayed_work work; @@ -43,6 +46,8 @@ struct max17040_chip { int soc; /* State Of Charge */ int status; + /* Low alert threshold from 32% to 1% of the State of Charge */ + u32 low_soc_alert; }; static int max17040_get_property(struct power_supply *psy, @@ -99,6 +104,21 @@ static void max17040_reset(struct i2c_client *client) max17040_write_reg(client, MAX17040_CMD, 0x0054); } +static int max17040_set_low_soc_alert(struct i2c_client *client, u32 level) +{ + int ret; + u16 data; + + level = 32 - level; + data = max17040_read_reg(client, MAX17040_RCOMP); + /* clear the alrt bit and set LSb 5 bits */ + data &= MAX17040_ATHD_MASK; + data |= level; + ret = max17040_write_reg(client, MAX17040_RCOMP, data); + + return ret; +} + static void max17040_get_vcell(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); @@ -115,7 +135,6 @@ static void max17040_get_soc(struct i2c_client *client) u16 soc; soc = max17040_read_reg(client, MAX17040_SOC); - chip->soc = (soc >> 8); } @@ -161,6 +180,24 @@ static void max17040_get_status(struct i2c_client *client) chip->status = POWER_SUPPLY_STATUS_FULL; } +static int max17040_get_of_data(struct max17040_chip *chip) +{ + struct device *dev = &chip->client->dev; + struct device_node *np = dev->of_node; + int ret = 0; + + if (of_property_read_u32(np, "maxim,alert-low-soc-level", + &chip->low_soc_alert)) { + chip->low_soc_alert = MAX17040_ATHD_DEFAULT_POWER_UP; + } else if (chip->low_soc_alert <= 0 || + chip->low_soc_alert >= 33) { + /* low_soc_alert is not between 1% and 32% */ + ret = -EINVAL; + } + + return ret; +} + static void max17040_check_changes(struct i2c_client *client) { max17040_get_vcell(client); @@ -192,9 +229,27 @@ static irqreturn_t max17040_thread_handler(int id, void *dev) /* send uevent */ power_supply_changed(chip->battery); + /* reset alert bit */ + max17040_set_low_soc_alert(client, chip->low_soc_alert); + return IRQ_HANDLED; } +static int max17040_enable_alert_irq(struct max17040_chip *chip) +{ + struct i2c_client *client = chip->client; + unsigned int flags; + int ret; + + dev_info(&client->dev, "IRQ: enabled\n"); + flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; + ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, + max17040_thread_handler, flags, + chip->battery->desc->name, chip); + + return ret; +} + static enum power_supply_property max17040_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, @@ -216,6 +271,7 @@ static int max17040_probe(struct i2c_client *client, struct i2c_adapter *adapter = client->adapter; struct power_supply_config psy_cfg = {}; struct max17040_chip *chip; + int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) return -EIO; @@ -226,6 +282,12 @@ static int max17040_probe(struct i2c_client *client, chip->client = client; chip->pdata = client->dev.platform_data; + ret = max17040_get_of_data(chip); + if (ret) { + dev_err(&client->dev, + "failed: low SOC alert OF data out of bounds\n"); + return ret; + } i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; @@ -242,20 +304,26 @@ static int max17040_probe(struct i2c_client *client, /* check interrupt */ if (client->irq) { - int ret; - unsigned int flags; - - dev_info(&client->dev, "IRQ: enabled\n"); - flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; - ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, - max17040_thread_handler, flags, - chip->battery->desc->name, - chip); - - if (ret) { - client->irq = 0; + if (of_device_is_compatible(client->dev.of_node, + "maxim,max77836-battery")) { + ret = max17040_set_low_soc_alert(client, + chip->low_soc_alert); + if (ret) { + dev_err(&client->dev, + "Failed to set low SOC alert: err %d\n", + ret); + return ret; + } + + ret = max17040_enable_alert_irq(chip); + if (ret) { + client->irq = 0; + dev_warn(&client->dev, + "Failed to get IRQ err %d\n", ret); + } + } else { dev_warn(&client->dev, - "Failed to get IRQ err %d\n", ret); + "Device not compatible for IRQ"); } }