From patchwork Wed Jun 24 15:56:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Iskren Chernev X-Patchwork-Id: 211751 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0D7AC433E0 for ; Wed, 24 Jun 2020 15:56:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78BEB2077D for ; Wed, 24 Jun 2020 15:56:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="u1n8/Pfd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404645AbgFXP4u (ORCPT ); Wed, 24 Jun 2020 11:56:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404351AbgFXP4t (ORCPT ); Wed, 24 Jun 2020 11:56:49 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF59DC061573; Wed, 24 Jun 2020 08:56:48 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id g18so2818487wrm.2; Wed, 24 Jun 2020 08:56:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=e0eRXDu98M9NKV0R7IkrYaYI1Jss3RwntJq8TlK0J3M=; b=u1n8/Pfd1zsmvwHOIwFAdpXFBCEJEz99VHTMmmpy89KwouVtNivtqrweIBxKBuQCsO TfeoGz26qldEMwNYh9hDI1XnyXYilLL6U0ptbxEfVl9up42fCTL1UGjBlp99ykNFpx7w WR8bihnqS1GVLAB0jN3eHsiHq0EffU9ptWUQI5l5gBeCoET5l4BikddXAZ9/oMoLmIQm hmr/3JRtg4mi7fhX57Cm5YK93aLY7YvmP9bS2zOzte4yrmGIJN1LhAqnX0wUzaCiVnta 0GMEcWoaepVf6VL+tZQbgaIel6HA/8POR4oO3k/v2Xm9dimysPK0h/Qp+MQKwInI/PXG PttQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=e0eRXDu98M9NKV0R7IkrYaYI1Jss3RwntJq8TlK0J3M=; b=Mp6P+LGOrfUol2gr8goA8wq/m9AwjkMsNIm1r03vp+FCQy7ESdQEsWdh810hJzgWpG WlIVcdIX3G3ut6yk8ZJi6THGygRt2R/AAIr5xy/T+SxeFI9HJbUFTavi8vSY9wcYHF6m Uo9nLjKftLzxoULiqtbkoLYlAv8CyP6Qm84LgN4kw9Lm5TVa1ycs3x8cMr5A25M3CgG6 kYbmCV36muiZybHwDy2mm+souw3MvRWh6kF7SuTkR8WRy92O2lTGsGnK4pJ/LT6w0w2Z p8CgZBH4I2MWbPuvUUzv62/6fcDAhKpyVEOYcWHyQhjKQF1PyndnaQ356Ret0qMQTP2c u/Ug== X-Gm-Message-State: AOAM531mxqjqlkj17RhVJpKEOY7aggP6DBOM9S7TkvwW9I8mAxv8Mv2O MfCxs1+UAeMEmokayLttjH8tr3W9lZQ= X-Google-Smtp-Source: ABdhPJz9fyj06ufYAP3BqfcnXXtQcxvhh9AoXY0nrSORTgtvgbARLxsAqSZqc6LznjMyUA57s6o0sw== X-Received: by 2002:adf:edc6:: with SMTP id v6mr20373157wro.413.1593014207500; Wed, 24 Jun 2020 08:56:47 -0700 (PDT) Received: from localhost ([213.191.183.145]) by smtp.gmail.com with ESMTPSA id m10sm9398257wru.4.2020.06.24.08.56.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jun 2020 08:56:46 -0700 (PDT) From: Iskren Chernev To: Sebastian Reichel , Rob Herring Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Jonathan Bakker , Vladimir Barinov , Iskren Chernev Subject: [PATCH v3 1/6] power: supply: max17040: Use regmap i2c Date: Wed, 24 Jun 2020 18:56:28 +0300 Message-Id: <20200624155633.3557401-2-iskren.chernev@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200624155633.3557401-1-iskren.chernev@gmail.com> References: <20200624155633.3557401-1-iskren.chernev@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Rewrite i2c operations from i2c client read/write to regmap i2c. As a result, most private functions now accept the private driver data instead of an i2c client pointer. Signed-off-by: Iskren Chernev --- drivers/power/supply/Kconfig | 1 + drivers/power/supply/max17040_battery.c | 250 +++++++++++------------- 2 files changed, 110 insertions(+), 141 deletions(-) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 44d3c8512fb8d..12ca79952768f 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -367,6 +367,7 @@ config AXP288_FUEL_GAUGE config BATTERY_MAX17040 tristate "Maxim MAX17040 Fuel Gauge" depends on I2C + select REGMAP_I2C help MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17040 is configured diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 48aa44665e2f1..678241fcc2548 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -16,32 +16,30 @@ #include #include #include +#include #include #define MAX17040_VCELL 0x02 #define MAX17040_SOC 0x04 #define MAX17040_MODE 0x06 #define MAX17040_VER 0x08 -#define MAX17040_RCOMP 0x0C +#define MAX17040_CONFIG 0x0C #define MAX17040_CMD 0xFE #define MAX17040_DELAY 1000 #define MAX17040_BATTERY_FULL 95 -#define MAX17040_ATHD_MASK 0xFFC0 +#define MAX17040_ATHD_MASK 0x3f #define MAX17040_ATHD_DEFAULT_POWER_UP 4 struct max17040_chip { struct i2c_client *client; + struct regmap *regmap; struct delayed_work work; struct power_supply *battery; struct max17040_platform_data *pdata; - /* State Of Connect */ - int online; - /* battery voltage */ - int vcell; /* battery capacity */ int soc; /* State Of Charge */ @@ -50,135 +48,68 @@ struct max17040_chip { u32 low_soc_alert; }; -static int max17040_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct max17040_chip *chip = power_supply_get_drvdata(psy); - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - val->intval = chip->status; - break; - case POWER_SUPPLY_PROP_ONLINE: - val->intval = chip->online; - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - val->intval = chip->vcell; - break; - case POWER_SUPPLY_PROP_CAPACITY: - val->intval = chip->soc; - break; - default: - return -EINVAL; - } - return 0; -} - -static int max17040_write_reg(struct i2c_client *client, int reg, u16 value) -{ - int ret; - - ret = i2c_smbus_write_word_swapped(client, reg, value); - - if (ret < 0) - dev_err(&client->dev, "%s: err %d\n", __func__, ret); - - return ret; -} - -static int max17040_read_reg(struct i2c_client *client, int reg) -{ - int ret; - - ret = i2c_smbus_read_word_swapped(client, reg); - - if (ret < 0) - dev_err(&client->dev, "%s: err %d\n", __func__, ret); - - return ret; -} - -static void max17040_reset(struct i2c_client *client) +static int max17040_reset(struct max17040_chip *chip) { - max17040_write_reg(client, MAX17040_CMD, 0x0054); + return regmap_write(chip->regmap, MAX17040_CMD, 0x0054); } -static int max17040_set_low_soc_alert(struct i2c_client *client, u32 level) +static int max17040_set_low_soc_alert(struct max17040_chip *chip, 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; + return regmap_update_bits(chip->regmap, MAX17040_CONFIG, + MAX17040_ATHD_MASK, level); } -static void max17040_get_vcell(struct i2c_client *client) +static int max17040_get_vcell(struct max17040_chip *chip) { - struct max17040_chip *chip = i2c_get_clientdata(client); - u16 vcell; + u32 vcell; - vcell = max17040_read_reg(client, MAX17040_VCELL); + regmap_read(chip->regmap, MAX17040_VCELL, &vcell); - chip->vcell = (vcell >> 4) * 1250; + return (vcell >> 4) * 1250; } -static void max17040_get_soc(struct i2c_client *client) +static int max17040_get_soc(struct max17040_chip *chip) { - struct max17040_chip *chip = i2c_get_clientdata(client); - u16 soc; + u32 soc; - soc = max17040_read_reg(client, MAX17040_SOC); + regmap_read(chip->regmap, MAX17040_SOC, &soc); - chip->soc = (soc >> 8); + return soc >> 8; } -static void max17040_get_version(struct i2c_client *client) +static int max17040_get_version(struct max17040_chip *chip) { - u16 version; + int ret; + u32 version; - version = max17040_read_reg(client, MAX17040_VER); + ret = regmap_read(chip->regmap, MAX17040_VER, &version); - dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", version); + return ret ? ret : version; } -static void max17040_get_online(struct i2c_client *client) +static int max17040_get_online(struct max17040_chip *chip) { - struct max17040_chip *chip = i2c_get_clientdata(client); - - if (chip->pdata && chip->pdata->battery_online) - chip->online = chip->pdata->battery_online(); - else - chip->online = 1; + return chip->pdata && chip->pdata->battery_online ? + chip->pdata->battery_online() : 1; } -static void max17040_get_status(struct i2c_client *client) +static int max17040_get_status(struct max17040_chip *chip) { - struct max17040_chip *chip = i2c_get_clientdata(client); - if (!chip->pdata || !chip->pdata->charger_online - || !chip->pdata->charger_enable) { - chip->status = POWER_SUPPLY_STATUS_UNKNOWN; - return; - } + || !chip->pdata->charger_enable) + return POWER_SUPPLY_STATUS_UNKNOWN; + + if (max17040_get_soc(chip) > MAX17040_BATTERY_FULL) + return POWER_SUPPLY_STATUS_FULL; - if (chip->pdata->charger_online()) { + if (chip->pdata->charger_online()) if (chip->pdata->charger_enable()) - chip->status = POWER_SUPPLY_STATUS_CHARGING; + return POWER_SUPPLY_STATUS_CHARGING; else - chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING; - } else { - chip->status = POWER_SUPPLY_STATUS_DISCHARGING; - } - - if (chip->soc > MAX17040_BATTERY_FULL) - chip->status = POWER_SUPPLY_STATUS_FULL; + return POWER_SUPPLY_STATUS_NOT_CHARGING; + else + return POWER_SUPPLY_STATUS_DISCHARGING; } static int max17040_get_of_data(struct max17040_chip *chip) @@ -190,18 +121,31 @@ static int max17040_get_of_data(struct max17040_chip *chip) "maxim,alert-low-soc-level", &chip->low_soc_alert); - if (chip->low_soc_alert <= 0 || chip->low_soc_alert >= 33) + if (chip->low_soc_alert <= 0 || chip->low_soc_alert >= 33) { + dev_err(dev, "maxim,alert-low-soc-level out of bounds\n"); return -EINVAL; + } return 0; } -static void max17040_check_changes(struct i2c_client *client) +static void max17040_check_changes(struct max17040_chip *chip) +{ + chip->soc = max17040_get_soc(chip); + chip->status = max17040_get_status(chip); +} + +static void max17040_queue_work(struct max17040_chip *chip) +{ + queue_delayed_work(system_power_efficient_wq, &chip->work, + MAX17040_DELAY); +} + +static void max17040_stop_work(void *data) { - max17040_get_vcell(client); - max17040_get_soc(client); - max17040_get_online(client); - max17040_get_status(client); + struct max17040_chip *chip = data; + + cancel_delayed_work_sync(&chip->work); } static void max17040_work(struct work_struct *work) @@ -214,30 +158,29 @@ static void max17040_work(struct work_struct *work) /* store SOC and status to check changes */ last_soc = chip->soc; last_status = chip->status; - max17040_check_changes(chip->client); + max17040_check_changes(chip); /* check changes and send uevent */ if (last_soc != chip->soc || last_status != chip->status) power_supply_changed(chip->battery); - queue_delayed_work(system_power_efficient_wq, &chip->work, - MAX17040_DELAY); + max17040_queue_work(chip); } static irqreturn_t max17040_thread_handler(int id, void *dev) { struct max17040_chip *chip = dev; - struct i2c_client *client = chip->client; - dev_warn(&client->dev, "IRQ: Alert battery low level"); + dev_warn(&chip->client->dev, "IRQ: Alert battery low level"); + /* read registers */ - max17040_check_changes(chip->client); + max17040_check_changes(chip); /* send uevent */ power_supply_changed(chip->battery); /* reset alert bit */ - max17040_set_low_soc_alert(client, chip->low_soc_alert); + max17040_set_low_soc_alert(chip, chip->low_soc_alert); return IRQ_HANDLED; } @@ -256,6 +199,38 @@ static int max17040_enable_alert_irq(struct max17040_chip *chip) return ret; } +static int max17040_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct max17040_chip *chip = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + val->intval = max17040_get_status(chip); + break; + case POWER_SUPPLY_PROP_ONLINE: + val->intval = max17040_get_online(chip); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = max17040_get_vcell(chip); + break; + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = max17040_get_soc(chip); + break; + default: + return -EINVAL; + } + return 0; +} + +static const struct regmap_config max17040_regmap = { + .reg_bits = 8, + .reg_stride = 2, + .val_bits = 16, + .val_format_endian = REGMAP_ENDIAN_BIG, +}; + static enum power_supply_property max17040_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, @@ -287,31 +262,33 @@ static int max17040_probe(struct i2c_client *client, return -ENOMEM; chip->client = client; + chip->regmap = devm_regmap_init_i2c(client, &max17040_regmap); 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"); + if (ret) return ret; - } i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; - chip->battery = power_supply_register(&client->dev, + chip->battery = devm_power_supply_register(&client->dev, &max17040_battery_desc, &psy_cfg); if (IS_ERR(chip->battery)) { dev_err(&client->dev, "failed: power supply register\n"); return PTR_ERR(chip->battery); } - max17040_reset(client); - max17040_get_version(client); + ret = max17040_get_version(chip); + if (ret < 0) + return ret; + dev_dbg(&chip->client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", ret); + + max17040_reset(chip); /* check interrupt */ if (client->irq && of_device_is_compatible(client->dev.of_node, "maxim,max77836-battery")) { - ret = max17040_set_low_soc_alert(client, chip->low_soc_alert); + ret = max17040_set_low_soc_alert(chip, chip->low_soc_alert); if (ret) { dev_err(&client->dev, "Failed to set low SOC alert: err %d\n", ret); @@ -327,18 +304,11 @@ static int max17040_probe(struct i2c_client *client, } INIT_DEFERRABLE_WORK(&chip->work, max17040_work); - queue_delayed_work(system_power_efficient_wq, &chip->work, - MAX17040_DELAY); - - return 0; -} - -static int max17040_remove(struct i2c_client *client) -{ - struct max17040_chip *chip = i2c_get_clientdata(client); + ret = devm_add_action(&client->dev, max17040_stop_work, chip); + if (ret) + return ret; + max17040_queue_work(chip); - power_supply_unregister(chip->battery); - cancel_delayed_work(&chip->work); return 0; } @@ -362,12 +332,11 @@ static int max17040_resume(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct max17040_chip *chip = i2c_get_clientdata(client); - queue_delayed_work(system_power_efficient_wq, &chip->work, - MAX17040_DELAY); - if (client->irq && device_may_wakeup(dev)) disable_irq_wake(client->irq); + max17040_queue_work(chip); + return 0; } @@ -401,7 +370,6 @@ static struct i2c_driver max17040_i2c_driver = { .pm = MAX17040_PM_OPS, }, .probe = max17040_probe, - .remove = max17040_remove, .id_table = max17040_id, }; module_i2c_driver(max17040_i2c_driver); From patchwork Wed Jun 24 15:56:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Iskren Chernev X-Patchwork-Id: 211750 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8ACDC433DF for ; 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Wed, 24 Jun 2020 08:56:53 -0700 (PDT) Received: from localhost ([213.191.183.145]) by smtp.gmail.com with ESMTPSA id l14sm10966651wrn.18.2020.06.24.08.56.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jun 2020 08:56:52 -0700 (PDT) From: Iskren Chernev To: Sebastian Reichel , Rob Herring Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Jonathan Bakker , Vladimir Barinov , Iskren Chernev Subject: [PATCH v3 3/6] power: supply: max17040: Support compatible devices Date: Wed, 24 Jun 2020 18:56:30 +0300 Message-Id: <20200624155633.3557401-4-iskren.chernev@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200624155633.3557401-1-iskren.chernev@gmail.com> References: <20200624155633.3557401-1-iskren.chernev@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The max17040 fuel gauge is part of a family of 8 chips that have very similar mode of operations and registers. This change adds: - compatible strings for all supported devices and handling for the minor differences between them; - handling for devices reporting double capacity via maxim,double-soc; The datasheets of the supported devices are linked [0] [1] [2] [3]. [0] https://datasheets.maximintegrated.com/en/ds/MAX17040-MAX17041.pdf [1] https://datasheets.maximintegrated.com/en/ds/MAX17043-MAX17044.pdf [2] https://datasheets.maximintegrated.com/en/ds/MAX17048-MAX17049.pdf [3] https://datasheets.maximintegrated.com/en/ds/MAX17058-MAX17059.pdf Signed-off-by: Iskren Chernev --- drivers/power/supply/Kconfig | 10 +- drivers/power/supply/max17040_battery.c | 143 +++++++++++++++++++++--- 2 files changed, 135 insertions(+), 18 deletions(-) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 12ca79952768f..0efdb282fea28 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -369,9 +369,13 @@ config BATTERY_MAX17040 depends on I2C select REGMAP_I2C help - MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries - in handheld and portable equipment. The MAX17040 is configured - to operate with a single lithium cell + Maxim models with ModelGauge are fuel-gauge systems for lithium-ion + (Li+) batteries in handheld and portable equipment, including + max17040, max17041, max17043, max17044, max17048, max17049, max17058, + max17059. It is also included in some batteries like max77836. + + Driver supports reporting SOC (State of Charge, i.e capacity), + voltage and configurable low-SOC wakeup interrupt. config BATTERY_MAX17042 tristate "Maxim MAX17042/17047/17050/8997/8966 Fuel Gauge" diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 678241fcc2548..a6ecd84194e51 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -33,12 +34,92 @@ #define MAX17040_ATHD_MASK 0x3f #define MAX17040_ATHD_DEFAULT_POWER_UP 4 +enum chip_id { + ID_MAX17040, + ID_MAX17041, + ID_MAX17043, + ID_MAX17044, + ID_MAX17048, + ID_MAX17049, + ID_MAX17058, + ID_MAX17059, +}; + +/* values that differ by chip_id */ +struct chip_data { + u16 reset_val; + u16 vcell_shift; + u16 vcell_mul; + u16 vcell_div; + u8 has_low_soc_alert; +}; + +static struct chip_data max17040_family[] = { + [ID_MAX17040] = { + .reset_val = 0x0054, + .vcell_shift = 4, + .vcell_mul = 1250, + .vcell_div = 1, + .has_low_soc_alert = 0, + }, + [ID_MAX17041] = { + .reset_val = 0x0054, + .vcell_shift = 4, + .vcell_mul = 2500, + .vcell_div = 1, + .has_low_soc_alert = 0, + }, + [ID_MAX17043] = { + .reset_val = 0x0054, + .vcell_shift = 4, + .vcell_mul = 1250, + .vcell_div = 1, + .has_low_soc_alert = 1, + }, + [ID_MAX17044] = { + .reset_val = 0x0054, + .vcell_shift = 4, + .vcell_mul = 2500, + .vcell_div = 1, + .has_low_soc_alert = 1, + }, + [ID_MAX17048] = { + .reset_val = 0x5400, + .vcell_shift = 0, + .vcell_mul = 625, + .vcell_div = 8, + .has_low_soc_alert = 1, + }, + [ID_MAX17049] = { + .reset_val = 0x5400, + .vcell_shift = 0, + .vcell_mul = 625, + .vcell_div = 4, + .has_low_soc_alert = 1, + }, + [ID_MAX17058] = { + .reset_val = 0x5400, + .vcell_shift = 0, + .vcell_mul = 625, + .vcell_div = 8, + .has_low_soc_alert = 1, + }, + [ID_MAX17059] = { + .reset_val = 0x5400, + .vcell_shift = 0, + .vcell_mul = 625, + .vcell_div = 4, + .has_low_soc_alert = 1, + }, +}; + struct max17040_chip { struct i2c_client *client; struct regmap *regmap; struct delayed_work work; struct power_supply *battery; struct max17040_platform_data *pdata; + struct chip_data data; /* battery capacity */ int soc; @@ -46,11 +127,13 @@ struct max17040_chip { int status; /* Low alert threshold from 32% to 1% of the State of Charge */ u32 low_soc_alert; + /* some devices return twice the capacity */ + bool quirk_double_soc; }; static int max17040_reset(struct max17040_chip *chip) { - return regmap_write(chip->regmap, MAX17040_CMD, 0x0054); + return regmap_write(chip->regmap, MAX17040_CMD, chip->data.reset_val); } static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level) @@ -60,13 +143,21 @@ static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level) MAX17040_ATHD_MASK, level); } +static int max17040_raw_vcell_to_uvolts(struct max17040_chip *chip, u16 vcell) +{ + struct chip_data *d = &chip->data; + + return (vcell >> d->vcell_shift) * d->vcell_mul / d->vcell_div; +} + + static int max17040_get_vcell(struct max17040_chip *chip) { u32 vcell; regmap_read(chip->regmap, MAX17040_VCELL, &vcell); - return (vcell >> 4) * 1250; + return max17040_raw_vcell_to_uvolts(chip, vcell); } static int max17040_get_soc(struct max17040_chip *chip) @@ -75,7 +166,7 @@ static int max17040_get_soc(struct max17040_chip *chip) regmap_read(chip->regmap, MAX17040_SOC, &soc); - return soc >> 8; + return soc >> (chip->quirk_double_soc ? 9 : 8); } static int max17040_get_version(struct max17040_chip *chip) @@ -125,6 +216,8 @@ static int max17040_get_of_data(struct max17040_chip *chip) dev_err(dev, "maxim,alert-low-soc-level out of bounds\n"); return -EINVAL; } + chip->quirk_double_soc = device_property_read_bool(dev, + "maxim,double-soc"); return 0; } @@ -252,6 +345,7 @@ static int max17040_probe(struct i2c_client *client, struct i2c_adapter *adapter = client->adapter; struct power_supply_config psy_cfg = {}; struct max17040_chip *chip; + enum chip_id chip_id; int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) @@ -264,9 +358,14 @@ static int max17040_probe(struct i2c_client *client, chip->client = client; chip->regmap = devm_regmap_init_i2c(client, &max17040_regmap); chip->pdata = client->dev.platform_data; - ret = max17040_get_of_data(chip); - if (ret) - return ret; + chip_id = (enum chip_id) id->driver_data; + if (client->dev.of_node) { + ret = max17040_get_of_data(chip); + if (ret) + return ret; + chip_id = (enum chip_id) of_device_get_match_data(&client->dev); + } + chip->data = max17040_family[chip_id]; i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; @@ -283,11 +382,11 @@ static int max17040_probe(struct i2c_client *client, return ret; dev_dbg(&chip->client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", ret); - max17040_reset(chip); + if (chip_id == ID_MAX17040 || chip_id == ID_MAX17041) + max17040_reset(chip); /* check interrupt */ - if (client->irq && of_device_is_compatible(client->dev.of_node, - "maxim,max77836-battery")) { + if (client->irq && chip->data.has_low_soc_alert) { ret = max17040_set_low_soc_alert(chip, chip->low_soc_alert); if (ret) { dev_err(&client->dev, @@ -350,16 +449,30 @@ static SIMPLE_DEV_PM_OPS(max17040_pm_ops, max17040_suspend, max17040_resume); #endif /* CONFIG_PM_SLEEP */ static const struct i2c_device_id max17040_id[] = { - { "max17040" }, - { "max77836-battery" }, - { } + { "max17040", ID_MAX17040 }, + { "max17041", ID_MAX17041 }, + { "max17043", ID_MAX17043 }, + { "max77836-battery", ID_MAX17043 }, + { "max17044", ID_MAX17044 }, + { "max17048", ID_MAX17048 }, + { "max17049", ID_MAX17049 }, + { "max17058", ID_MAX17058 }, + { "max17059", ID_MAX17059 }, + { /* sentinel */ } }; MODULE_DEVICE_TABLE(i2c, max17040_id); static const struct of_device_id max17040_of_match[] = { - { .compatible = "maxim,max17040" }, - { .compatible = "maxim,max77836-battery" }, - { }, + { .compatible = "maxim,max17040", .data = (void *) ID_MAX17040 }, + { .compatible = "maxim,max17041", .data = (void *) ID_MAX17041 }, + { .compatible = "maxim,max17043", .data = (void *) ID_MAX17043 }, + { .compatible = "maxim,max77836-battery", .data = (void *) ID_MAX17043 }, + { .compatible = "maxim,max17044", .data = (void *) ID_MAX17044 }, + { .compatible = "maxim,max17048", .data = (void *) ID_MAX17048 }, + { .compatible = "maxim,max17049", .data = (void *) ID_MAX17049 }, + { .compatible = "maxim,max17058", .data = (void *) ID_MAX17058 }, + { .compatible = "maxim,max17059", .data = (void *) ID_MAX17059 }, + { /* sentinel */ }, }; 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Wed, 24 Jun 2020 08:57:00 -0700 (PDT) From: Iskren Chernev To: Sebastian Reichel , Rob Herring Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Jonathan Bakker , Vladimir Barinov , Iskren Chernev Subject: [PATCH v3 6/6] power: supply: max17040: Support soc alert Date: Wed, 24 Jun 2020 18:56:33 +0300 Message-Id: <20200624155633.3557401-7-iskren.chernev@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200624155633.3557401-1-iskren.chernev@gmail.com> References: <20200624155633.3557401-1-iskren.chernev@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org max17048 and max17049 support SOC alerts (interrupts when battery capacity changes by +/- 1%). At the moment the driver polls for changes every second. Using the alerts removes the need for polling. Signed-off-by: Iskren Chernev --- drivers/power/supply/max17040_battery.c | 82 ++++++++++++++++++++++--- 1 file changed, 73 insertions(+), 9 deletions(-) diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 54393f411211e..4425411775f26 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -25,6 +25,7 @@ #define MAX17040_MODE 0x06 #define MAX17040_VER 0x08 #define MAX17040_CONFIG 0x0C +#define MAX17040_STATUS 0x1A #define MAX17040_CMD 0xFE @@ -33,7 +34,10 @@ #define MAX17040_RCOMP_DEFAULT 0x9700 #define MAX17040_ATHD_MASK 0x3f +#define MAX17040_ALSC_MASK 0x40 #define MAX17040_ATHD_DEFAULT_POWER_UP 4 +#define MAX17040_STATUS_HD_MASK 0x1000 +#define MAX17040_STATUS_SC_MASK 0x2000 #define MAX17040_CFG_RCOMP_MASK 0xff00 enum chip_id { @@ -55,6 +59,7 @@ struct chip_data { u16 vcell_div; u8 has_low_soc_alert; u8 rcomp_bytes; + u8 has_soc_alert; }; static struct chip_data max17040_family[] = { @@ -65,6 +70,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 0, .rcomp_bytes = 2, + .has_soc_alert = 0, }, [ID_MAX17041] = { .reset_val = 0x0054, @@ -73,6 +79,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 0, .rcomp_bytes = 2, + .has_soc_alert = 0, }, [ID_MAX17043] = { .reset_val = 0x0054, @@ -81,6 +88,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17044] = { .reset_val = 0x0054, @@ -89,6 +97,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 1, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17048] = { .reset_val = 0x5400, @@ -97,6 +106,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 8, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 1, }, [ID_MAX17049] = { .reset_val = 0x5400, @@ -105,6 +115,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 4, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 1, }, [ID_MAX17058] = { .reset_val = 0x5400, @@ -113,6 +124,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 8, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, [ID_MAX17059] = { .reset_val = 0x5400, @@ -121,6 +133,7 @@ static struct chip_data max17040_family[] = { .vcell_div = 4, .has_low_soc_alert = 1, .rcomp_bytes = 1, + .has_soc_alert = 0, }, }; @@ -156,6 +169,12 @@ static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level) MAX17040_ATHD_MASK, level); } +static int max17040_set_soc_alert(struct max17040_chip *chip, bool enable) +{ + return regmap_update_bits(chip->regmap, MAX17040_CONFIG, + MAX17040_ALSC_MASK, enable ? MAX17040_ALSC_MASK : 0); +} + static int max17040_set_rcomp(struct max17040_chip *chip, u16 rcomp) { u16 mask = chip->data.rcomp_bytes == 2 ? @@ -298,11 +317,33 @@ static void max17040_work(struct work_struct *work) max17040_queue_work(chip); } +/* Returns true if alert cause was SOC change, not low SOC */ +static bool max17040_handle_soc_alert(struct max17040_chip *chip) +{ + bool ret = true; + u32 data; + + regmap_read(chip->regmap, MAX17040_STATUS, &data); + + if (data & MAX17040_STATUS_HD_MASK) { + // this alert was caused by low soc + ret = false; + } + if (data & MAX17040_STATUS_SC_MASK) { + // soc change bit -- deassert to mark as handled + regmap_write(chip->regmap, MAX17040_STATUS, + data & ~MAX17040_STATUS_SC_MASK); + } + + return ret; +} + static irqreturn_t max17040_thread_handler(int id, void *dev) { struct max17040_chip *chip = dev; - dev_warn(&chip->client->dev, "IRQ: Alert battery low level"); + if (!(chip->data.has_soc_alert && max17040_handle_soc_alert(chip))) + dev_warn(&chip->client->dev, "IRQ: Alert battery low level\n"); /* read registers */ max17040_check_changes(chip); @@ -384,6 +425,7 @@ static int max17040_probe(struct i2c_client *client, struct power_supply_config psy_cfg = {}; struct max17040_chip *chip; enum chip_id chip_id; + bool enable_irq = false; int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) @@ -434,6 +476,27 @@ static int max17040_probe(struct i2c_client *client, return ret; } + enable_irq = true; + } + + if (client->irq && chip->data.has_soc_alert) { + ret = max17040_set_soc_alert(chip, 1); + if (ret) { + dev_err(&client->dev, + "Failed to set SOC alert: err %d\n", ret); + return ret; + } + enable_irq = true; + } else { + /* soc alerts negate the need for polling */ + INIT_DEFERRABLE_WORK(&chip->work, max17040_work); + ret = devm_add_action(&client->dev, max17040_stop_work, chip); + if (ret) + return ret; + max17040_queue_work(chip); + } + + if (enable_irq) { ret = max17040_enable_alert_irq(chip); if (ret) { client->irq = 0; @@ -442,12 +505,6 @@ static int max17040_probe(struct i2c_client *client, } } - INIT_DEFERRABLE_WORK(&chip->work, max17040_work); - ret = devm_add_action(&client->dev, max17040_stop_work, chip); - if (ret) - return ret; - max17040_queue_work(chip); - return 0; } @@ -458,7 +515,11 @@ static int max17040_suspend(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct max17040_chip *chip = i2c_get_clientdata(client); - cancel_delayed_work(&chip->work); + if (client->irq && chip->data.has_soc_alert) + // disable soc alert to prevent wakeup + max17040_set_soc_alert(chip, 0); + else + cancel_delayed_work(&chip->work); if (client->irq && device_may_wakeup(dev)) enable_irq_wake(client->irq); @@ -474,7 +535,10 @@ static int max17040_resume(struct device *dev) if (client->irq && device_may_wakeup(dev)) disable_irq_wake(client->irq); - max17040_queue_work(chip); + if (client->irq && chip->data.has_soc_alert) + max17040_set_soc_alert(chip, 1); + else + max17040_queue_work(chip); return 0; }