From patchwork Mon Mar 2 10:10:36 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaewon Kim X-Patchwork-Id: 5911161 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 71AC89F373 for ; Mon, 2 Mar 2015 10:10:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5443E20222 for ; Mon, 2 Mar 2015 10:10:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA4DF20221 for ; Mon, 2 Mar 2015 10:10:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751241AbbCBKKq (ORCPT ); Mon, 2 Mar 2015 05:10:46 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:37020 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750959AbbCBKKo (ORCPT ); Mon, 2 Mar 2015 05:10:44 -0500 Received: from epcpsbgr1.samsung.com (u141.gpu120.samsung.co.kr [203.254.230.141]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NKK00MPMXLUEKD0@mailout1.samsung.com>; Mon, 02 Mar 2015 19:10:42 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [172.20.52.113]) by epcpsbgr1.samsung.com (EPCPMTA) with SMTP id 3C.71.17016.22734F45; Mon, 02 Mar 2015 19:10:42 +0900 (KST) X-AuditID: cbfee68d-f79296d000004278-7a-54f43722c7e2 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id AF.F1.09430.12734F45; Mon, 02 Mar 2015 19:10:42 +0900 (KST) Received: from localhost.localdomain ([10.252.83.201]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NKK00M92XLR0A20@mmp1.samsung.com>; Mon, 02 Mar 2015 19:10:41 +0900 (KST) From: Jaewon Kim To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-input@vger.kernel.org Cc: Inki Dae , SangBae Lee , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Lee Jones , Chanwoo Choi , Sebastian Reichel , Beomho Seo , Jaewon Kim , Dmitry Torokhov Subject: [PATCH v7 3/5] power: max77843_battery: Add Max77843 fuel gauge device driver Date: Mon, 02 Mar 2015 19:10:36 +0900 Message-id: <1425291038-18269-4-git-send-email-jaewon02.kim@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1425291038-18269-1-git-send-email-jaewon02.kim@samsung.com> References: <1425291038-18269-1-git-send-email-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprJIsWRmVeSWpSXmKPExsWyRsSkUFfJ/EuIwefn4hanP21jt7j+5Tmr xfwj51gtDi96wWjR/2Yhq8W5VysZLSbdn8BisaPhCKvF/a9HGS1ufvrGanF51xw2i8+9Rxgt ll6/yGQxYfpaFovWvUfYLY5/OshicXp3iYOgx5p5axg9Lvf1MnnsnHWX3WPl8i9sHptWdbJ5 3Lm2h82jb8sqRo/Pm+QCOKK4bFJSczLLUov07RK4Mt6/LS3Y413x9sIkxgbGN3ZdjJwcEgIm Es/33WaGsMUkLtxbzwZiCwksZZT4uiIBpmbTzIksXYxcQPFFjBIv/k5khihqY5I4t8EZxGYT 0Jb4vn4xK4gtIlAq0fjwLitIA7PAD2aJ37NegSWEBSIkpi2FaGYRUJXYdW83I4jNK+Ah0fnu E3sXIwfQNgWJOZNsQMKcAp4Sx1+9YoTY5SGx6OwpsCMkBP6yS7y5cp0VYo6AxLfJh1ggemUl Nh2AekZS4uCKGywTGIUXMDKsYhRNLUguKE5KLzLUK07MLS7NS9dLzs/dxAiMsdP/nvXuYLx9 wPoQowAHoxIPr8eczyFCrIllxZW5hxhNgTZMZJYSTc4HRnJeSbyhsZmRhamJqbGRuaWZkjiv otTPYCGB9MSS1OzU1ILUovii0pzU4kOMTBycUg2M7me8z+yP7u3lF7WZnCCuPnteQa5S1Nzp moqh2bcnLzUpnLbAuKC3KoKd+TFTjraXVNq77fvXiJ/6UiX/m+Hbwfz2h5u/cfSz+nwvillu oVa16a5KqKya0KWvycWRRZN6lOx0T9R/thF5+CYqTDRY611qucqzuKbnryds9G1me9WqLxK8 qluJpTgj0VCLuag4EQB6awnirAIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCIsWRmVeSWpSXmKPExsVy+t9jAV0l8y8hBl3buC1Of9rGbnH9y3NW i/lHzrFaHF70gtGi/81CVotzr1YyWky6P4HFYkfDEVaL+1+PMlrc/PSN1eLyrjlsFp97jzBa LL1+kcliwvS1LBate4+wWxz/dJDF4vTuEgdBjzXz1jB6XO7rZfLYOesuu8fK5V/YPDat6mTz uHNtD5tH35ZVjB6fN8kFcEQ1MNpkpCampBYppOYl56dk5qXbKnkHxzvHm5oZGOoaWlqYKynk Jeam2iq5+AToumXmAP2hpFCWmFMKFApILC5W0rfDNCE0xE3XAqYxQtc3JAiux8gADSSsYcx4 /7a0YI93xdsLkxgbGN/YdTFyckgImEhsmjmRBcIWk7hwbz1bFyMXh5DAIkaJF38nMoMkhATa mCTObXAGsdkEtCW+r1/MCmKLCJRKND68ywrSwCzwg1ni96xXYAlhgQiJaUshmlkEVCV23dvN CGLzCnhIdL77xN7FyAG0TUFiziQbkDCngKfE8VevGCF2eUgsOnuKZQIj7wJGhlWMoqkFyQXF Sem5RnrFibnFpXnpesn5uZsYwTH8THoH46oGi0OMAhyMSjy8HnM+hwixJpYVV+YeYpTgYFYS 4X0t/yVEiDclsbIqtSg/vqg0J7X4EKMp0FETmaVEk/OB6SWvJN7Q2MTMyNLI3NDCyNhcSZxX yb4tREggPbEkNTs1tSC1CKaPiYNTqoGx5JdOpfTC7l93i+PSE6z5Rf0e/WL2X1/xhaFif/vH n3/lL1x2sHOIPT7b33qncOScX2uZPeb+WX+ws8b4l9rF6aoyCQtVhF7oMGnIRbfPl9zvHxq4 42vQpNKzJ3/fXqmp+dpiieo7AzXtPV2LNkrWTT4pJd8zbaYW10/e4xkyy/yuLr/eGB6rxFKc kWioxVxUnAgAa082OfcCAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Beomho Seo This patch adds device driver of max77843 fuel gauge. The driver support for battery fuel gauge in Maxim Max77843. It is fuel-gauge systems for lithuum-ion batteries in handled and portable devices. Cc: Sebastian Reichel Signed-off-by: Beomho Seo Reviewed-By: Sebastian Reichel --- drivers/power/Kconfig | 9 ++ drivers/power/Makefile | 1 + drivers/power/max77843_battery.c | 286 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 296 insertions(+) create mode 100644 drivers/power/max77843_battery.c diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 994793d..42538e6 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -212,6 +212,15 @@ config BATTERY_MAX17042 with MAX17042. This driver also supports max17047/50 chips which are improved version of max17042. +config BATTERY_MAX77843 + tristate "Maxim MAX77843 Fuel Gauge" + depends on MFD_MAX77843 + help + This adds support for battery fuel gauge in Maxim MAX77843. It is + fuel-gauge for a lithium-ion batteries with a single cell and can be + found in portable devices. The MAX77843 is configured to operate with + a single lithium cell. + config BATTERY_Z2 tristate "Z2 battery driver" depends on I2C && MACH_ZIPIT2 diff --git a/drivers/power/Makefile b/drivers/power/Makefile index ed69cea..59e3945 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o +obj-$(CONFIG_BATTERY_MAX77843) += max77843_battery.o obj-$(CONFIG_BATTERY_Z2) += z2_battery.o obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o diff --git a/drivers/power/max77843_battery.c b/drivers/power/max77843_battery.c new file mode 100644 index 0000000..a4266de --- /dev/null +++ b/drivers/power/max77843_battery.c @@ -0,0 +1,286 @@ +/* + * Fuel gauge driver for Maxim MAX77843 + * + * Copyright (C) 2015 Samsung Electronics, Co., Ltd. + * Author: Beomho Seo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include + +struct max77843_battery { + struct device *dev; + struct max77843 *max77843; + struct i2c_client *client; + struct regmap *regmap; + struct power_supply psy; +}; + +static int max77843_battery_get_capacity(struct max77843_battery *battery) +{ + struct regmap *regmap = battery->regmap; + int ret, val; + unsigned int reg_data; + + ret = regmap_read(regmap, MAX77843_FG_REG_SOCREP, ®_data); + if (ret) { + dev_err(battery->dev, "Failed to read fuelgauge register\n"); + return ret; + } + + val = reg_data >> 8; + + return val; +} + +static int max77843_battery_get_energy_prop(struct max77843_battery *battery, + enum power_supply_property psp) +{ + struct regmap *regmap = battery->regmap; + unsigned int reg; + int ret, val; + unsigned int reg_data; + + switch (psp) { + case POWER_SUPPLY_PROP_ENERGY_FULL: + reg = MAX77843_FG_REG_FULLCAP; + break; + case POWER_SUPPLY_PROP_ENERGY_NOW: + reg = MAX77843_FG_REG_REMCAP_REP; + break; + case POWER_SUPPLY_PROP_ENERGY_AVG: + reg = MAX77843_FG_REG_REMCAP_AV; + break; + default: + return -EINVAL; + } + + ret = regmap_read(regmap, reg, ®_data); + if (ret) { + dev_err(battery->dev, "Failed to read fuelgauge register\n"); + return ret; + } + + val = reg_data; + + return val; +} + +static int max77843_battery_get_current_prop(struct max77843_battery *battery, + enum power_supply_property psp) +{ + struct regmap *regmap = battery->regmap; + unsigned int reg; + int ret, val; + unsigned int reg_data; + + switch (psp) { + case POWER_SUPPLY_PROP_CURRENT_NOW: + reg = MAX77843_FG_REG_CURRENT; + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + reg = MAX77843_FG_REG_AVG_CURRENT; + break; + default: + return -EINVAL; + } + + ret = regmap_read(regmap, reg, ®_data); + if (ret) { + dev_err(battery->dev, "Failed to read fuelgauge register\n"); + return ret; + } + + val = reg_data; + if (val & 0x8000) { + /* Negative */ + val = ~val & 0xffff; + val++; + val *= -1; + } + /* Unit of current is mA */ + val = val * 15625 / 100000; + + return val; +} + +static int max77843_battery_get_voltage_prop(struct max77843_battery *battery, + enum power_supply_property psp) +{ + struct regmap *regmap = battery->regmap; + unsigned int reg; + int ret, val; + unsigned int reg_data; + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + reg = MAX77843_FG_REG_VCELL; + break; + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + reg = MAX77843_FG_REG_AVG_VCELL; + break; + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + reg = MAX77843_FG_REG_OCV; + break; + default: + return -EINVAL; + } + + ret = regmap_read(regmap, reg, ®_data); + if (ret) { + dev_err(battery->dev, "Failed to read fuelgauge register\n"); + return ret; + } + + val = (reg_data >> 4) * 125; + val /= 100; + + return val; +} + +static const char *model_name = "MAX77843"; +static const char *manufacturer = "Maxim Integrated"; + +static int max77843_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct max77843_battery *battery = container_of(psy, + struct max77843_battery, psy); + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + val->intval = max77843_battery_get_voltage_prop(battery, psp); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + case POWER_SUPPLY_PROP_CURRENT_AVG: + val->intval = max77843_battery_get_current_prop(battery, psp); + break; + case POWER_SUPPLY_PROP_ENERGY_FULL: + case POWER_SUPPLY_PROP_ENERGY_NOW: + case POWER_SUPPLY_PROP_ENERGY_AVG: + val->intval = max77843_battery_get_energy_prop(battery, psp); + break; + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = max77843_battery_get_capacity(battery); + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = model_name; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = manufacturer; + break; + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property max77843_battery_props[] = { + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_AVG, + POWER_SUPPLY_PROP_VOLTAGE_OCV, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_ENERGY_FULL, + POWER_SUPPLY_PROP_ENERGY_NOW, + POWER_SUPPLY_PROP_ENERGY_AVG, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static const struct regmap_config max77843_fuel_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .val_format_endian = REGMAP_ENDIAN_NATIVE, + .max_register = MAX77843_FG_END, +}; + +static int max77843_battery_probe(struct platform_device *pdev) +{ + struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); + struct max77843_battery *battery; + int ret; + + battery = devm_kzalloc(&pdev->dev, sizeof(*battery), GFP_KERNEL); + if (!battery) + return -ENOMEM; + + battery->dev = &pdev->dev; + battery->max77843 = max77843; + + battery->client = i2c_new_dummy(max77843->i2c->adapter, I2C_ADDR_FG); + if (!battery->client) { + dev_err(&pdev->dev, "Failed to get dummy i2c client.\n"); + return PTR_ERR(battery->client); + } + i2c_set_clientdata(battery->client, max77843); + + battery->regmap = devm_regmap_init_i2c(battery->client, + &max77843_fuel_regmap_config); + if (IS_ERR(battery->regmap)) { + ret = PTR_ERR(battery->regmap); + goto err_i2c; + } + + platform_set_drvdata(pdev, battery); + + battery->psy.name = "max77843-fuelgauge"; + battery->psy.type = POWER_SUPPLY_TYPE_BATTERY; + battery->psy.get_property = max77843_battery_get_property; + battery->psy.properties = max77843_battery_props; + battery->psy.num_properties = ARRAY_SIZE(max77843_battery_props); + + ret = power_supply_register(&pdev->dev, &battery->psy); + if (ret) { + dev_err(&pdev->dev, "Failed to register power supply\n"); + goto err_i2c; + } + + return 0; + +err_i2c: + i2c_unregister_device(battery->client); + + return ret; +} + +static int max77843_battery_remove(struct platform_device *pdev) +{ + struct max77843_battery *battery = platform_get_drvdata(pdev); + + power_supply_unregister(&battery->psy); + + i2c_unregister_device(battery->client); + + return 0; +} + +static const struct platform_device_id max77843_battery_id[] = { + { "max77843-fuelgauge", }, + { } +}; +MODULE_DEVICE_TABLE(platform, max77843_battery_id); + +static struct platform_driver max77843_battery_driver = { + .driver = { + .name = "max77843-fuelgauge", + }, + .probe = max77843_battery_probe, + .remove = max77843_battery_remove, + .id_table = max77843_battery_id, +}; +module_platform_driver(max77843_battery_driver); + +MODULE_DESCRIPTION("Maxim MAX77843 fuel gauge driver"); +MODULE_AUTHOR("Beomho Seo "); +MODULE_LICENSE("GPL v2");