From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754878AbaKSEww (ORCPT ); Tue, 18 Nov 2014 23:52:52 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:32294 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754183AbaKSEwq (ORCPT ); Tue, 18 Nov 2014 23:52:46 -0500 X-AuditID: cbfee68d-f79296d000004278-a8-546c221cd02d From: Beomho Seo To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Cc: sameo@linux.intel.com, lee.jone@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, cw00.choi@samsung.com, geunsik.lim@samsung.com, inki.dae@samsung.com, sw0312.kim@samsung.com, Beomho Seo Subject: [PATCH v5 2/4] power: rt5033_battery: Add RT5033 Fuel gauge device driver Date: Wed, 19 Nov 2014 13:52:38 +0900 Message-id: <1416372760-2090-3-git-send-email-beomho.seo@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1416372760-2090-1-git-send-email-beomho.seo@samsung.com> References: <1416372760-2090-1-git-send-email-beomho.seo@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrIIsWRmVeSWpSXmKPExsWyRsSkWFdGKSfEoH+/hsXpT9vYLaY+fMJm cf3Lc1aLSU/eM1vMP3KO1WLiysnMFv1vFrJa/JnQymZx7tVKRotJ9yewWLzfc4bR4tuVDiaL y7vmsFl87j3CaLH0+kUmiwnT17JYtO49wm5xupvV4vTuEosZk1+yOYh4rJm3htHjcl8vk8fO WXfZPVYu/8LmsXmFlsemVZ1sHneu7WHzmHcy0KNvyypGj8+b5AK4orhsUlJzMstSi/TtErgy OjvmsxfctayYM2kfUwPjEYMuRk4OCQETiWm97cwQtpjEhXvr2boYuTiEBJYySvRN62eEKep7 fgUqMZ1RYtrTl+wQThuTxJ2j/1lBqtgENCXeT7nCAmKLCERInF02iwWkiFlgErPEzbc9YKOE BUIkZn+6zgZiswioSuza8AqsgVfAVWLZk4lAcQ6gdQoScybZgIQ5BdwkvjfcYQYJCwGV7F7L CjJSQmAmh8Stdd9ZIMYISHybfIgFolVWYtMBqG8kJQ6uuMEygVF4ASPDKkbR1ILkguKk9CJD veLE3OLSvHS95PzcTYzAmDz971nvDsbbB6wPMQpwMCrx8L54mx0ixJpYVlyZe4jRFGjDRGYp 0eR8YOTnlcQbGpsZWZiamBobmVuaKYnzKkr9DBYSSE8sSc1OTS1ILYovKs1JLT7EyMTBKdXA uOBWhxfvLtE5tZp31Hmc3xlJFc0WXzBhi7ydXHn356gemXMqZyyCDy9cxr+syY1p6+wm3+vK /a6BLzdXv55y6POmjXvT45zrmKfzappNkmR/fXfVNvM6K2npv5y7zBNEhO982RLTP7Vr+9Wr H+TecHetv9syT1TVZdGP+HmiscLXwxx3cD+3VmIpzkg01GIuKk4EAPL2lKnEAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrNIsWRmVeSWpSXmKPExsVy+t9jQV0ZpZwQg0UbpS1Of9rGbjH14RM2 i+tfnrNaTHryntli/pFzrBYTV05mtuh/s5DV4s+EVjaLc69WMlpMuj+BxeL9njOMFt+udDBZ XN41h83ic+8RRoul1y8yWUyYvpbFonXvEXaL092sFqd3l1jMmPySzUHEY828NYwel/t6mTx2 zrrL7rFy+Rc2j80rtDw2repk87hzbQ+bx7yTgR59W1YxenzeJBfAFdXAaJORmpiSWqSQmpec n5KZl26r5B0c7xxvamZgqGtoaWGupJCXmJtqq+TiE6DrlpkD9J2SQlliTilQKCCxuFhJ3w7T hNAQN10LmMYIXd+QILgeIwM0kLCGMaOzYz57wV3LijmT9jE1MB4x6GLk5JAQMJHoe36FDcIW k7hwbz2QzcUhJDCdUWLa05fsEE4bk8Sdo/9ZQarYBDQl3k+5wgJiiwhESJxdNosFpIhZYBKz xM23PYwgCWGBEInZn66DjWURUJXYteEVWAOvgKvEsicTgeIcQOsUJOZMsgEJcwq4SXxvuMMM EhYCKtm9lnUCI+8CRoZVjKKpBckFxUnpuYZ6xYm5xaV56XrJ+bmbGMER/0xqB+PKBotDjAIc jEo8vC/eZocIsSaWFVfmHmKU4GBWEuEV7AYK8aYkVlalFuXHF5XmpBYfYjQFumkis5Rocj4w GeWVxBsam5gZWRqZG1oYGZsrifMeaLUOFBJITyxJzU5NLUgtgulj4uCUamCsufCvgMNkn3U7 R2DhqincE5n4ZpxQmbNjzp75U46/9/kX7TOteGV9/+KMSUcCnx/6OOfovEffVvsfyZ5QsMtB /Yi1q13vmvryMxu99979J9E3eW0LhxrTb5/z7TM/snDmbd796YO2zQGd/WV85mmv5sz8v+rc 83hh3wObo77cfXemUeyfR9bGpUosxRmJhlrMRcWJAIlSO94OAwAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds device driver of Richtek PMIC. The driver support battery fuel gange. Fuel gauge calculates and determines the battery state of charge(SOC) according to battery open circuit voltage(OCV). Also, this driver provides battery average voltage, voltage and bettery present property. Cc: Sebastian Reichel Cc: Dmitry Eremin-Solenikov Cc: David Woodhouse Signed-off-by: Beomho Seo Acked-by: Chanwoo Choi --- Changes in v5: Changes in v4: - none. Changes in v3: - Add author information the top of driver. Changes in v2: - Remove volatile_reg callback. Because this driver not in use regmap cache. - Fix wrong register name. --- drivers/power/Kconfig | 8 ++ drivers/power/Makefile | 1 + drivers/power/rt5033_battery.c | 177 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 186 insertions(+) create mode 100644 drivers/power/rt5033_battery.c diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 0108c2a..da6981f 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -397,6 +397,14 @@ config BATTERY_GOLDFISH Say Y to enable support for the battery and AC power in the Goldfish emulator. +config BATTERY_RT5033 + tristate "RT5033 fuel gauge support" + depends on MFD_RT5033 + help + This adds support for battery fuel gauge in Richtek RT5033 PMIC. + The fuelgauge calculates and determines the battery state of charge + according to battery open circuit voltage. + source "drivers/power/reset/Kconfig" endif # POWER_SUPPLY diff --git a/drivers/power/Makefile b/drivers/power/Makefile index dfa8942..b83a0c7 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o obj-$(CONFIG_BATTERY_Z2) += z2_battery.o +obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o diff --git a/drivers/power/rt5033_battery.c b/drivers/power/rt5033_battery.c new file mode 100644 index 0000000..7b898f4 --- /dev/null +++ b/drivers/power/rt5033_battery.c @@ -0,0 +1,177 @@ +/* + * Fuel gauge driver for Richtek RT5033 + * + * Copyright (C) 2014 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 bythe Free Software Foundation. + */ + +#include +#include +#include +#include +#include + +static int rt5033_battery_get_capacity(struct i2c_client *client) +{ + struct rt5033_battery *battery = i2c_get_clientdata(client); + u32 msb; + + regmap_read(battery->regmap, RT5033_FUEL_REG_SOC_H, &msb); + + return msb; +} + +static int rt5033_battery_get_present(struct i2c_client *client) +{ + struct rt5033_battery *battery = i2c_get_clientdata(client); + u32 val; + + regmap_read(battery->regmap, RT5033_FUEL_REG_CONFIG_L, &val); + + return (val & RT5033_FUEL_BAT_PRESENT) ? true : false; +} + +static int rt5033_battery_get_watt_prop(struct i2c_client *client, + enum power_supply_property psp) +{ + struct rt5033_battery *battery = i2c_get_clientdata(client); + unsigned int regh, regl; + int ret; + u32 msb, lsb; + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + regh = RT5033_FUEL_REG_VBAT_H; + regl = RT5033_FUEL_REG_VBAT_L; + break; + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + regh = RT5033_FUEL_REG_AVG_VOLT_H; + regl = RT5033_FUEL_REG_AVG_VOLT_L; + break; + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + regh = RT5033_FUEL_REG_OCV_H; + regl = RT5033_FUEL_REG_OCV_L; + break; + default: + return -EINVAL; + } + + regmap_read(battery->regmap, regh, &msb); + regmap_read(battery->regmap, regl, &lsb); + + ret = ((msb << 4) + (lsb >> 4)) * 1250 / 1000; + + return ret; +} + +static int rt5033_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct rt5033_battery *battery = container_of(psy, + struct rt5033_battery, psy); + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_VOLTAGE_AVG: + case POWER_SUPPLY_PROP_VOLTAGE_OCV: + val->intval = rt5033_battery_get_watt_prop(battery->client, + psp); + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = rt5033_battery_get_present(battery->client); + break; + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = rt5033_battery_get_capacity(battery->client); + break; + default: + return -EINVAL; + } + return 0; +} + +static enum power_supply_property rt5033_battery_props[] = { + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_VOLTAGE_AVG, + POWER_SUPPLY_PROP_VOLTAGE_OCV, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_CAPACITY, +}; + +static struct regmap_config rt5033_battery_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RT5033_FUEL_REG_END, +}; + +static int rt5033_battery_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct rt5033_battery *battery; + u32 ret; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) + return -EIO; + + battery = devm_kzalloc(&client->dev, sizeof(*battery), GFP_KERNEL); + if (!battery) + return -EINVAL; + + battery->client = client; + battery->regmap = devm_regmap_init_i2c(client, + &rt5033_battery_regmap_config); + if (IS_ERR(battery->regmap)) { + dev_err(&client->dev, "Failed to initialize regmap\n"); + return -EINVAL; + } + + i2c_set_clientdata(client, battery); + + battery->psy.name = "rt5033-battery"; + battery->psy.type = POWER_SUPPLY_TYPE_BATTERY; + battery->psy.get_property = rt5033_battery_get_property; + battery->psy.properties = rt5033_battery_props; + battery->psy.num_properties = ARRAY_SIZE(rt5033_battery_props); + + ret = power_supply_register(&client->dev, &battery->psy); + if (ret) { + dev_err(&client->dev, "Failed to register power supply\n"); + return ret; + } + + return 0; +} + +static int rt5033_battery_remove(struct i2c_client *client) +{ + struct rt5033_battery *battery = i2c_get_clientdata(client); + + power_supply_unregister(&battery->psy); + + return 0; +} + +static const struct i2c_device_id rt5033_battery_id[] = { + { "rt5033-battery", }, + { } +}; +MODULE_DEVICE_TABLE(platform, rt5033_battery_id); + +static struct i2c_driver rt5033_battery_driver = { + .driver = { + .name = "rt5033-battery", + }, + .probe = rt5033_battery_probe, + .remove = rt5033_battery_remove, + .id_table = rt5033_battery_id, +}; +module_i2c_driver(rt5033_battery_driver); + +MODULE_DESCRIPTION("Richtek RT5033 fuel gauge driver"); +MODULE_AUTHOR("Beomho Seo "); +MODULE_LICENSE("GPL"); -- 1.7.9.5