From nobody Fri Dec 19 04:15:56 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0780EE645A for ; Fri, 15 Sep 2023 12:45:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235099AbjIOMpk (ORCPT ); Fri, 15 Sep 2023 08:45:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235077AbjIOMpc (ORCPT ); Fri, 15 Sep 2023 08:45:32 -0400 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7004D2119 for ; Fri, 15 Sep 2023 05:45:24 -0700 (PDT) Received: by mail-lf1-x134.google.com with SMTP id 2adb3069b0e04-501bd164fbfso3421945e87.0 for ; Fri, 15 Sep 2023 05:45:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1694781923; x=1695386723; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=64O685rh5/+WceyOWRqSka2vt/nlTOc2EOjMCPDPopw=; b=U/ZozT7GKehDBYdy0Zs8M0i/4/8GZF3brPwcRU8Ccc9xV9Q6P544HU7/rLkCGuxO9l NzuuhilY5zAkXjleWAsdiTpEZFP55MPtuEPk5o/SE/NOoHo+yhz74kKKnNeWEYQqjs5S hWp+/zsBiE18IQONgz2gS4aNW2lcU9loqcp+kYsDVNOF0zCwk55JBKbv2JmFOtzufeGC /vC6siAcz+n/xks6IVMw11UYt9dLzIhdNXhkmNvpUC1ArygBVFPe/AgpHNiX7vEbW/Uf HZnGmpbZmASAgp2gkZh/OrIcaZmnrMOvisRfdBPam0avM8SZ8ubkN9FR5zyJ/awVWKDm u2RA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694781923; x=1695386723; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=64O685rh5/+WceyOWRqSka2vt/nlTOc2EOjMCPDPopw=; b=eSpuTYwjJc++0Ocj+BX6IM5XmaOxEguVcKRijxHKbnk+e4SqxwLvm3czI63K8dHA2Y wrFtBkVU0BNSgxnmmYZyudOfSjCoFkkPJDqL5Ac83Qlp+A0hma9fOMQxWtlmw6z8oLso ZqefyyAZAzFk/TiMJSEor/CUhl6Mt+D2dmhN3ZvHHDHCb/bCGD3YKf3ts0PjunicEfme J86zSK+BkPQDFNIosPXq3EoA6EeF+cKa9Q4KILF9x7OmU3rW1K3fODq5TW1FvurKymmG zlEIy+u5SY44uk8saSdkDxeRkHMGbFoCw3+nC7zv167MMvg8ZpfSkafFG6fx5wS3nq+D 7BEQ== X-Gm-Message-State: AOJu0YwaZeUMbL31fwM0Zv+aiQdwCjKK8QxvuFRucIqf/9hJ45t46gcs BTxUS1Ozd0gsLq9+oeGWVfGg9XZLNKjwAI8DKqJgMQ== X-Google-Smtp-Source: AGHT+IGkDHYgV3kip0earhW8qVm96bbTxU9pilKgNREClOMWLZF8yMLIOibZL5pocXowUiXj3+h0pQ== X-Received: by 2002:a19:4f5b:0:b0:500:be66:e014 with SMTP id a27-20020a194f5b000000b00500be66e014mr1336911lfk.53.1694781922641; Fri, 15 Sep 2023 05:45:22 -0700 (PDT) Received: from [10.167.154.1] ([2a00:f41:cbe:bc7d:62a6:5d09:5ba7:be5b]) by smtp.gmail.com with ESMTPSA id f19-20020ac25333000000b004fe37199b87sm624752lfh.156.2023.09.15.05.45.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 05:45:22 -0700 (PDT) From: Konrad Dybcio Date: Fri, 15 Sep 2023 14:45:17 +0200 Subject: [PATCH v4 3/3] power: supply: Introduce MM8013 fuel gauge driver MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230621-topic-mm8013-v4-3-975aecd173ed@linaro.org> References: <20230621-topic-mm8013-v4-0-975aecd173ed@linaro.org> In-Reply-To: <20230621-topic-mm8013-v4-0-975aecd173ed@linaro.org> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , Konrad Dybcio Cc: Marijn Suijten , Rob Herring , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1694781917; l=10560; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=/d00LHDio/XkeskUxaF8XCxl9oQdSy+AyWbT9L2roW0=; b=nUMXPvy/czZfkY9otvDRLjk8nchC3JmwdJnGvA6TDWNWwUtMhn6KngmjWwoK7tuiKWy56aRT5 hAi9qGu/4TmBjX00GjHRDpKTpAME0N+jMHc+fGFInsPz6ohB7ELvvCV X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a driver for the Mitsumi MM8013 fuel gauge. The driver is a vastly cleaned up and improved version of the one that shipped in some obscure Lenovo downstream kernel [1], with some register definitions borrowed from ChromeOS EC platform code [2]. [1] https://github.com/adazem009/kernel_lenovo_bengal/commit/b6b346427a8717= 15709bd22aae449b9383f3b66b [2] https://chromium.googlesource.com/chromiumos/platform/ec/+/master/drive= r/battery/mm8013.h Signed-off-by: Konrad Dybcio --- uevent dump as of v4: POWER_SUPPLY_NAME=3Dmm8013 POWER_SUPPLY_TYPE=3DBattery POWER_SUPPLY_CAPACITY=3D100 POWER_SUPPLY_CHARGE_FULL=3D7124000 POWER_SUPPLY_CHARGE_FULL_DESIGN=3D7500000 POWER_SUPPLY_CURRENT_NOW=3D0 POWER_SUPPLY_CYCLE_COUNT=3D27 POWER_SUPPLY_HEALTH=3DGood POWER_SUPPLY_PRESENT=3D1 POWER_SUPPLY_STATUS=3DFull POWER_SUPPLY_TEMP=3D300 POWER_SUPPLY_TIME_TO_EMPTY_AVG=3D888 POWER_SUPPLY_VOLTAGE_NOW=3D4402000 --- MAINTAINERS | 5 + drivers/power/supply/Kconfig | 9 ++ drivers/power/supply/Makefile | 1 + drivers/power/supply/mm8013.c | 274 ++++++++++++++++++++++++++++++++++++++= ++++ 4 files changed, 289 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index fa7487b7729b..555403b9f011 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14409,6 +14409,11 @@ W: https://linuxtv.org T: git git://linuxtv.org/media_tree.git F: drivers/media/radio/radio-miropcm20* =20 +MITSUMI MM8013 FG DRIVER +M: Konrad Dybcio +F: Documentation/devicetree/bindings/power/supply/mitsumi,mm8013.yaml +F: drivers/power/supply/mm8013.c + MMP SUPPORT R: Lubomir Rintel L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 0c80c68fb0d7..3ef608d010f9 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -952,4 +952,13 @@ config CHARGER_QCOM_SMB2 adds support for the SMB2 switch mode battery charger found in PMI8998 and related PMICs. =20 +config FUEL_GAUGE_MM8013 + tristate "Mitsumi MM8013 fuel gauge driver" + depends on I2C + help + Say Y here to enable the Mitsumi MM8013 fuel gauge driver. + It enables the monitoring of many battery parameters, including + the state of charge, temperature, cycle count, actual and design + capacity, etc. + endif # POWER_SUPPLY diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index a8a9fa6de1e9..ba2c41f060be 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_BATTERY_SURFACE) +=3D surface_battery.o obj-$(CONFIG_CHARGER_SURFACE) +=3D surface_charger.o obj-$(CONFIG_BATTERY_UG3105) +=3D ug3105_battery.o obj-$(CONFIG_CHARGER_QCOM_SMB2) +=3D qcom_pmi8998_charger.o +obj-$(CONFIG_FUEL_GAUGE_MM8013) +=3D mm8013.o diff --git a/drivers/power/supply/mm8013.c b/drivers/power/supply/mm8013.c new file mode 100644 index 000000000000..bd8d54d6597f --- /dev/null +++ b/drivers/power/supply/mm8013.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2016-2019 The Linux Foundation. All rights reserved. + * Copyright (c) 2023, Linaro Limited + */ +#include +#include +#include +#include + +#define REG_BATID 0x00 /* This one is very unclear */ + #define BATID_101 0x0101 /* 107kOhm */ + #define BATID_102 0x0102 /* 10kOhm */ +#define REG_TEMPERATURE 0x06 +#define REG_VOLTAGE 0x08 +#define REG_FLAGS 0x0a + #define MM8013_FLAG_OTC BIT(15) + #define MM8013_FLAG_OTD BIT(14) + #define MM8013_FLAG_BATHI BIT(13) + #define MM8013_FLAG_FC BIT(9) + #define MM8013_FLAG_CHG BIT(8) + #define MM8013_FLAG_DSG BIT(0) +#define REG_FULL_CHARGE_CAPACITY 0x0e +#define REG_AVERAGE_CURRENT 0x14 +#define REG_AVERAGE_TIME_TO_EMPTY 0x16 +#define REG_AVERAGE_TIME_TO_FULL 0x18 +#define REG_CYCLE_COUNT 0x2a +#define REG_STATE_OF_CHARGE 0x2c +#define REG_DESIGN_CAPACITY 0x3c +/* TODO: 0x62-0x68 seem to contain 'MM8013C' in a length-prefixed, non-ter= minated string */ + +#define DECIKELVIN_TO_DECIDEGC(t) (t - 2731) + +struct mm8013_chip { + struct i2c_client *client; + struct regmap *regmap; +}; + +static int mm8013_checkdevice(struct mm8013_chip *chip) +{ + int battery_id, ret; + u32 val; + + ret =3D regmap_write(chip->regmap, REG_BATID, 0x0008); + if (ret < 0) + return ret; + + regmap_read(chip->regmap, REG_BATID, &val); + if (ret < 0) + return ret; + + if (val =3D=3D BATID_102) + battery_id =3D 2; + else if (val =3D=3D BATID_101) + battery_id =3D 1; + else + return -EINVAL; + + dev_dbg(&chip->client->dev, "battery_id: %d\n", battery_id); + + return 0; +} + +static enum power_supply_property mm8013_battery_props[] =3D { + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, + POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, + POWER_SUPPLY_PROP_VOLTAGE_NOW, +}; + +static int mm8013_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct mm8013_chip *chip =3D psy->drv_data; + int ret =3D 0; + u32 regval; + + switch (psp) { + case POWER_SUPPLY_PROP_CAPACITY: + ret =3D regmap_read(chip->regmap, REG_STATE_OF_CHARGE, ®val); + if (ret < 0) + return ret; + + val->intval =3D regval; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL: + ret =3D regmap_read(chip->regmap, REG_FULL_CHARGE_CAPACITY, ®val); + if (ret < 0) + return ret; + + val->intval =3D 1000 * regval; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + ret =3D regmap_read(chip->regmap, REG_DESIGN_CAPACITY, ®val); + if (ret < 0) + return ret; + + val->intval =3D 1000 * regval; + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret =3D regmap_read(chip->regmap, REG_AVERAGE_CURRENT, ®val); + if (ret < 0) + return ret; + + val->intval =3D -1000 * (s16)regval; + break; + case POWER_SUPPLY_PROP_CYCLE_COUNT: + ret =3D regmap_read(chip->regmap, REG_CYCLE_COUNT, ®val); + if (ret < 0) + return ret; + + val->intval =3D regval; + break; + case POWER_SUPPLY_PROP_HEALTH: + ret =3D regmap_read(chip->regmap, REG_FLAGS, ®val); + if (ret < 0) + return ret; + + if (regval & MM8013_FLAG_BATHI) + val->intval =3D POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else if (regval & (MM8013_FLAG_OTD | MM8013_FLAG_OTC)) + val->intval =3D POWER_SUPPLY_HEALTH_OVERHEAT; + else + val->intval =3D POWER_SUPPLY_HEALTH_GOOD; + break; + case POWER_SUPPLY_PROP_PRESENT: + ret =3D regmap_read(chip->regmap, REG_TEMPERATURE, ®val); + if (ret < 0) + return ret; + + val->intval =3D ((s16)regval > 0); + break; + case POWER_SUPPLY_PROP_STATUS: + ret =3D regmap_read(chip->regmap, REG_FLAGS, ®val); + if (ret < 0) + return ret; + + if (regval & MM8013_FLAG_DSG) + val->intval =3D POWER_SUPPLY_STATUS_DISCHARGING; + else if (regval & MM8013_FLAG_CHG) + val->intval =3D POWER_SUPPLY_STATUS_CHARGING; + else if (regval & MM8013_FLAG_FC) + val->intval =3D POWER_SUPPLY_STATUS_FULL; + else + val->intval =3D POWER_SUPPLY_STATUS_UNKNOWN; + break; + case POWER_SUPPLY_PROP_TEMP: + ret =3D regmap_read(chip->regmap, REG_TEMPERATURE, ®val); + if (ret < 0) + return ret; + + val->intval =3D DECIKELVIN_TO_DECIDEGC(regval); + break; + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: + ret =3D regmap_read(chip->regmap, REG_AVERAGE_TIME_TO_EMPTY, ®val); + if (ret < 0) + return ret; + + /* The estimation is not yet ready */ + if (regval =3D=3D U16_MAX) + return -ENODATA; + + val->intval =3D regval; + break; + case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: + ret =3D regmap_read(chip->regmap, REG_AVERAGE_TIME_TO_FULL, ®val); + if (ret < 0) + return ret; + + /* The estimation is not yet ready */ + if (regval =3D=3D U16_MAX) + return -ENODATA; + + val->intval =3D regval; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret =3D regmap_read(chip->regmap, REG_VOLTAGE, ®val); + if (ret < 0) + return ret; + + val->intval =3D 1000 * regval; + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct power_supply_desc mm8013_desc =3D { + .name =3D "mm8013", + .type =3D POWER_SUPPLY_TYPE_BATTERY, + .properties =3D mm8013_battery_props, + .num_properties =3D ARRAY_SIZE(mm8013_battery_props), + .get_property =3D mm8013_get_property, +}; + +static const struct regmap_config mm8013_regmap_config =3D { + .reg_bits =3D 8, + .val_bits =3D 16, + .max_register =3D 0x68, + .use_single_read =3D true, + .use_single_write =3D true, + .val_format_endian =3D REGMAP_ENDIAN_LITTLE, +}; + +static int mm8013_probe(struct i2c_client *client) +{ + struct power_supply_config psy_cfg =3D {}; + struct device *dev =3D &client->dev; + struct power_supply *psy; + struct mm8013_chip *chip; + int ret =3D 0; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return dev_err_probe(dev, -EIO, + "I2C_FUNC_SMBUS_WORD_DATA not supported\n"); + + chip =3D devm_kzalloc(dev, sizeof(struct mm8013_chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->client =3D client; + + chip->regmap =3D devm_regmap_init_i2c(client, &mm8013_regmap_config); + if (IS_ERR(chip->regmap)) + return dev_err_probe(dev, ret, "Couldn't initialize regmap\n"); + + ret =3D mm8013_checkdevice(chip); + if (ret) + return dev_err_probe(dev, ret, "MM8013 not found\n"); + + psy_cfg.drv_data =3D chip; + psy_cfg.of_node =3D dev->of_node; + + psy =3D devm_power_supply_register(dev, &mm8013_desc, &psy_cfg); + if (IS_ERR(psy)) + return PTR_ERR(psy); + + return 0; +} + +static const struct i2c_device_id mm8013_id_table[] =3D { + { "mm8013", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, mm8013_id_table); + +static const struct of_device_id mm8013_match_table[] =3D { + { .compatible =3D "mitsumi,mm8013" }, + {} +}; + +static struct i2c_driver mm8013_i2c_driver =3D { + .probe =3D mm8013_probe, + .id_table =3D mm8013_id_table, + .driver =3D { + .name =3D "mm8013", + .of_match_table =3D mm8013_match_table, + }, +}; +module_i2c_driver(mm8013_i2c_driver); + +MODULE_DESCRIPTION("MM8013 fuel gauge driver"); +MODULE_LICENSE("GPL"); --=20 2.42.0