From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757086AbaKTNQ4 (ORCPT ); Thu, 20 Nov 2014 08:16:56 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:27034 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756313AbaKTNQv (ORCPT ); Thu, 20 Nov 2014 08:16:51 -0500 X-AuditID: cbfee68d-f79296d000004278-b8-546de9c0c4fe 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 v6 2/4] power: rt5033_battery: Add RT5033 Fuel gauge device driver Date: Thu, 20 Nov 2014 22:16:44 +0900 Message-id: <1416489406-12416-3-git-send-email-beomho.seo@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1416489406-12416-1-git-send-email-beomho.seo@samsung.com> References: <1416489406-12416-1-git-send-email-beomho.seo@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrEIsWRmVeSWpSXmKPExsWyRsSkUPfAy9wQgx0/jCxOf9rGbjH14RM2 i+tfnrNaTHryntli/pFzrBYTV05mtuh/s5DV4s+EVjaLc69WMlpMuj+BxeL9njOMFt+udDBZ XN41h83ic+8RRoul1y8yWUyYvpbFonXvEXaL092sFqd3l1jMmPySzUHEY828NYwel/t6mTx2 zrrL7rFy+Rc2j80rtDw2repk87hzbQ+bx7yTgR59W1YxenzeJBfAFcVlk5Kak1mWWqRvl8CV sbbzNFPBK8uKuz+msTYwnjXoYuTkkBAwkfh5/BMbhC0mceHeeiCbi0NIYCmjxKHL59lgilZ9 P80IkZjOKPHm+Qkop41Jov3gU3aQKjYBTYn3U66wgNgiAhESZ5fNYgEpYhaYxCxx820PI0hC WCBE4sjCHrAGFgFViQf3r4Gt4BVwk1jQ08PUxcgBtE5BYs4kG5Awp4C7xJlrPawgthBQyauu P2CLJQTmckhs6bvPCjFHQOLb5EMsEL2yEpsOMENcLSlxcMUNlgmMwgsYGVYxiqYWJBcUJ6UX GeoVJ+YWl+al6yXn525iBEbl6X/Pencw3j5gfYhRgINRiYc3wSI3RIg1say4MvcQoynQhonM UqLJ+cDYzyuJNzQ2M7IwNTE1NjK3NFMS51WU+hksJJCeWJKanZpakFoUX1Sak1p8iJGJg1Oq gTHrafvkH0Ud/DIcfgt5pzX8eCrbf6py5Qd9lbeWarOau5Wem//Suvxrp/h+kXuWKyOfTZ6/ +cUn138RV+88nrMk8PiZijWTvpiGXV+0uED4+/ZZyd8ez7VdEJe8N0w2LMnsAWN4b/eaaMsp ad27/FJEwgreL+j4VsTgaRW50bbmTuq/H4KH37xRYinOSDTUYi4qTgQAcgb0ksUCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrDIsWRmVeSWpSXmKPExsVy+t9jQd0DL3NDDLrOq1uc/rSN3WLqwyds Fte/PGe1mPTkPbPF/CPnWC0mrpzMbNH/ZiGrxZ8JrWwW516tZLSYdH8Ci8X7PWcYLb5d6WCy uLxrDpvF594jjBZLr19kspgwfS2LReveI+wWp7tZLU7vLrGYMfklm4OIx5p5axg9Lvf1Mnns nHWX3WPl8i9sHptXaHlsWtXJ5nHn2h42j3knAz36tqxi9Pi8SS6AK6qB0SYjNTEltUghNS85 PyUzL91WyTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DXLTMH6DslhbLEnFKgUEBicbGSvh2m CaEhbroWMI0Rur4hQXA9RgZoIGENY8baztNMBa8sK+7+mMbawHjWoIuRk0NCwERi1ffTjBC2 mMSFe+vZuhi5OIQEpjNKvHl+ghHCaWOSaD/4lB2kik1AU+L9lCssILaIQITE2WWzWECKmAUm MUvcfNsDNkpYIETiyMIesAYWAVWJB/evsYHYvAJuEgt6epi6GDmA1ilIzJlkAxLmFHCXOHOt hxXEFgIqedX1h3ECI+8CRoZVjKKpBckFxUnpuYZ6xYm5xaV56XrJ+bmbGMEx/0xqB+PKBotD jAIcjEo8vAkWuSFCrIllxZW5hxglOJiVRHg1dgKFeFMSK6tSi/Lji0pzUosPMZoCHTWRWUo0 OR+YjvJK4g2NTcyMLI3MDS2MjM2VxHlv3ARqEkhPLEnNTk0tSC2C6WPi4JRqYNymd7Mh8+5J CS2fXr33XflvbD4Htrw5bDJH2O/xk+WcIctjpp2auFDwF7+Vu+df2arf/X7B9w7kbRSZ2M0V Pn3ujPlxzqadS64UxrocWZLdp9f4/cqn9CWv9y75NllSLeDS//+rCldUGl/8ktvwg8tW9oTv K3GO5+yHNzBO4D4yYX/Mg9NHn3AqsRRnJBpqMRcVJwIAnoH2IQ8DAAA= 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 v6: 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