From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754924AbcAHMRY (ORCPT ); Fri, 8 Jan 2016 07:17:24 -0500 Received: from mail-ig0-f195.google.com ([209.85.213.195]:33667 "EHLO mail-ig0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754819AbcAHMRV (ORCPT ); Fri, 8 Jan 2016 07:17:21 -0500 MIME-Version: 1.0 In-Reply-To: <1452242773-18887-2-git-send-email-wenyou.yang@atmel.com> References: <1452242773-18887-1-git-send-email-wenyou.yang@atmel.com> <1452242773-18887-2-git-send-email-wenyou.yang@atmel.com> Date: Fri, 8 Jan 2016 21:17:20 +0900 X-Google-Sender-Auth: 51_dxV7Ic1YqlaG4zc27RuIhpgg Message-ID: Subject: Re: [PATCH v2 1/2] power: act8945a: add charger driver for ACT8945A From: Krzysztof Kozlowski To: Wenyou Yang Cc: Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Nicolas Ferre , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2016-01-08 17:46 GMT+09:00 Wenyou Yang : > This patch adds new driver for Active-semi ACT8945A ActivePath > charger (part of ACT8945A MFD driver) providing power supply class > information to userspace. > > The driver is configured through DTS (battery and system related > settings) and sysfs entries (timers and input over-voltage threshold). > > Signed-off-by: Wenyou Yang > --- > > Changes in v2: > 1./ Substitute of_property_read_bool() for of_get_property(). > 2./ Substitute devm_power_supply_register() for power_supply_register(). > 3./ Use module_platform_driver(), instead of subsys_initcall(). > 4./ Substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2"). > > drivers/power/Kconfig | 7 + > drivers/power/Makefile | 1 + > drivers/power/act8945a_charger.c | 386 ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 394 insertions(+) > create mode 100644 drivers/power/act8945a_charger.c > > diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig > index 1ddd13c..ae75211 100644 > --- a/drivers/power/Kconfig > +++ b/drivers/power/Kconfig > @@ -75,6 +75,13 @@ config BATTERY_88PM860X > help > Say Y here to enable battery monitor for Marvell 88PM860x chip. > > +config BATTERY_ACT8945A > + tristate "Active-semi ACT8945A charger driver" > + depends on MFD_ACT8945A > + help > + Say Y here to enable support for power supply provided by > + Active-semi ActivePath ACT8945A charger. > + > config BATTERY_DS2760 > tristate "DS2760 battery driver (HP iPAQ & others)" > depends on W1 && W1_SLAVE_DS2760 > diff --git a/drivers/power/Makefile b/drivers/power/Makefile > index 0e4eab5..e46b75d 100644 > --- a/drivers/power/Makefile > +++ b/drivers/power/Makefile > @@ -17,6 +17,7 @@ obj-$(CONFIG_WM8350_POWER) += wm8350_power.o > obj-$(CONFIG_TEST_POWER) += test_power.o > > obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o > +obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o > obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o > obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o > obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o > diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c > new file mode 100644 > index 0000000..fe9c19f > --- /dev/null > +++ b/drivers/power/act8945a_charger.c > @@ -0,0 +1,386 @@ > +/* > + * Power supply driver for the Active-semi ACT8945A PMIC > + * > + * Copyright (C) 2015 Atmel Corporation > + * Wenyou Yang > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +static const char *act8945a_charger_model = "ACT8945A"; > +static const char *act8945a_charger_manufacturer = "Active-semi"; > + > +/** > + * ACT8945A Charger Register Map > + */ > + > +/* 0x70: Reserved */ > +#define ACT8945A_APCH_CFG 0x71 > +#define ACT8945A_APCH_STATUS 0x78 > +#define ACT8945A_APCH_CTRL 0x79 > +#define ACT8945A_APCH_STATE 0x7A > + > +/* ACT8945A_APCH_CFG */ > +#define APCH_CFG_OVPSET (0x03 << 0) > +#define APCH_CFG_OVPSET_6V6 (0x0 << 0) > +#define APCH_CFG_OVPSET_7V (0x1 << 0) > +#define APCH_CFG_OVPSET_7V5 (0x2 << 0) > +#define APCH_CFG_OVPSET_8V (0x3 << 0) > +#define APCH_CFG_PRETIMO (0x03 << 2) > +#define APCH_CFG_PRETIMO_40_MIN (0x0 << 2) > +#define APCH_CFG_PRETIMO_60_MIN (0x1 << 2) > +#define APCH_CFG_PRETIMO_80_MIN (0x2 << 2) > +#define APCH_CFG_PRETIMO_DISABLED (0x3 << 2) > +#define APCH_CFG_TOTTIMO (0x03 << 4) > +#define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4) > +#define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4) > +#define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4) > +#define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4) > +#define APCH_CFG_SUSCHG (0x01 << 7) > + > +#define APCH_STATUS_CHGDAT (0x01 << 0) > +#define APCH_STATUS_INDAT (0x01 << 1) > +#define APCH_STATUS_TEMPDAT (0x01 << 2) > +#define APCH_STATUS_TIMRDAT (0x01 << 3) > +#define APCH_STATUS_CHGSTAT (0x01 << 4) > +#define APCH_STATUS_INSTAT (0x01 << 5) > +#define APCH_STATUS_TEMPSTAT (0x01 << 6) > +#define APCH_STATUS_TIMRSTAT (0x01 << 7) > + > +#define APCH_CTRL_CHGEOCOUT (0x01 << 0) > +#define APCH_CTRL_INDIS (0x01 << 1) > +#define APCH_CTRL_TEMPOUT (0x01 << 2) > +#define APCH_CTRL_TIMRPRE (0x01 << 3) > +#define APCH_CTRL_CHGEOCIN (0x01 << 4) > +#define APCH_CTRL_INCON (0x01 << 5) > +#define APCH_CTRL_TEMPIN (0x01 << 6) > +#define APCH_CTRL_TIMRTOT (0x01 << 7) > + > +#define APCH_STATE_ACINSTAT (0x01 << 1) > +#define APCH_STATE_CSTATE (0x03 << 4) > +#define APCH_STATE_CSTATE_SHIFT 4 > +#define APCH_STATE_CSTATE_DISABLED 0x00 > +#define APCH_STATE_CSTATE_EOC 0x01 > +#define APCH_STATE_CSTATE_FAST 0x02 > +#define APCH_STATE_CSTATE_PRE 0x03 > + > +struct act8945a_charger { > + struct device *dev; > + struct act8945a_dev *act8945a_dev; > + struct power_supply *psy; > + > + u32 tolal_time_out; > + u32 pre_time_out; > + u32 input_voltage_threshold; > + bool battery_temperature; > + int chglev_pin; > + int chglev_value; > +}; > + > +static int act8945a_get_charger_state(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int status, state; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); > + if (ret < 0) > + return ret; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); > + if (ret < 0) > + return ret; > + > + state &= APCH_STATE_CSTATE; > + state >>= APCH_STATE_CSTATE_SHIFT; > + > + if (state == APCH_STATE_CSTATE_EOC) { > + if (status & APCH_STATUS_CHGDAT) > + *val = POWER_SUPPLY_STATUS_FULL; > + else > + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; > + } else if ((state == APCH_STATE_CSTATE_FAST) || > + (state == APCH_STATE_CSTATE_PRE)) { > + *val = POWER_SUPPLY_STATUS_CHARGING; > + } else { > + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; > + } > + > + return 0; > +} > + > +static int act8945a_get_charge_type(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int state; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); > + if (ret < 0) > + return ret; > + > + state &= APCH_STATE_CSTATE; > + state >>= APCH_STATE_CSTATE_SHIFT; > + > + switch (state) { > + case APCH_STATE_CSTATE_PRE: > + *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; > + break; > + case APCH_STATE_CSTATE_FAST: > + *val = POWER_SUPPLY_CHARGE_TYPE_FAST; > + break; > + case APCH_STATE_CSTATE_EOC: > + case APCH_STATE_CSTATE_DISABLED: > + default: > + *val = POWER_SUPPLY_CHARGE_TYPE_NONE; > + } > + > + return 0; > +} > + > +static int act8945a_get_battery_health(struct act8945a_charger *charger, > + struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int status; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); > + if (ret < 0) > + return ret; > + > + if (charger->battery_temperature && !(status & APCH_STATUS_TEMPDAT)) > + *val = POWER_SUPPLY_HEALTH_OVERHEAT; > + else if (!(status & APCH_STATUS_INDAT)) > + *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; > + else if (status & APCH_STATUS_TIMRDAT) > + *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; > + else > + *val = POWER_SUPPLY_HEALTH_GOOD; > + > + return 0; > +} > + > +static enum power_supply_property act8945a_charger_props[] = { > + POWER_SUPPLY_PROP_STATUS, > + POWER_SUPPLY_PROP_CHARGE_TYPE, > + POWER_SUPPLY_PROP_TECHNOLOGY, > + POWER_SUPPLY_PROP_HEALTH, > + POWER_SUPPLY_PROP_MODEL_NAME, > + POWER_SUPPLY_PROP_MANUFACTURER > +}; > + > +static int act8945a_charger_get_property(struct power_supply *psy, > + enum power_supply_property prop, > + union power_supply_propval *val) > +{ > + struct act8945a_charger *charger = power_supply_get_drvdata(psy); > + struct regmap *regmap = charger->act8945a_dev->regmap; > + int ret = 0; > + > + switch (prop) { > + case POWER_SUPPLY_PROP_STATUS: > + ret = act8945a_get_charger_state(regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_CHARGE_TYPE: > + ret = act8945a_get_charge_type(regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_TECHNOLOGY: > + val->intval = POWER_SUPPLY_TECHNOLOGY_LION; > + break; > + case POWER_SUPPLY_PROP_HEALTH: > + ret = act8945a_get_battery_health(charger, > + regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_MODEL_NAME: > + val->strval = act8945a_charger_model; > + break; > + case POWER_SUPPLY_PROP_MANUFACTURER: > + val->strval = act8945a_charger_manufacturer; > + break; > + default: > + return -EINVAL; > + } > + > + return ret; > +} > + > +static const struct power_supply_desc act8945a_charger_desc = { > + .name = "act8945a-charger", > + .type = POWER_SUPPLY_TYPE_BATTERY, > + .get_property = act8945a_charger_get_property, > + .properties = act8945a_charger_props, > + .num_properties = ARRAY_SIZE(act8945a_charger_props), > +}; > + > +#define DEFAULT_TOTAL_TIME_OUT 3 > +#define DEFAULT_PRE_TIME_OUT 40 > +#define DEFAULT_INPUT_OVP_THRESHOLD 6600 > + > +static int act8945a_charger_parse_dt(struct device *dev, > + struct act8945a_charger *charger) > +{ > + struct device_node *np = dev->of_node; > + enum of_gpio_flags flags; > + > + if (!np) { > + dev_err(dev, "no charger of node\n"); > + return -EINVAL; > + } > + > + charger->chglev_pin = of_get_named_gpio_flags(np, > + "active-semi,chglev-gpio", 0, &flags); > + > + charger->chglev_value = (flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1; > + > + charger->battery_temperature = of_property_read_bool(np, > + "active-semi,battery_temperature"); > + > + if (of_property_read_u32(np, "active-semi,input_voltage_threshold", > + &charger->input_voltage_threshold)) > + charger->input_voltage_threshold = DEFAULT_PRE_TIME_OUT; > + > + if (of_property_read_u32(np, "active-semi,precondition_timeout", > + &charger->pre_time_out)) > + charger->pre_time_out = DEFAULT_PRE_TIME_OUT; > + > + if (of_property_read_u32(np, "active-semi,total_timeout", > + &charger->tolal_time_out)) > + charger->tolal_time_out = DEFAULT_TOTAL_TIME_OUT; > + > + return 0; > +} > + > +static int act8945a_charger_config(struct act8945a_charger *charger) > +{ > + struct regmap *regmap = charger->act8945a_dev->regmap; > + u8 value = 0; > + > + if (gpio_is_valid(charger->chglev_pin)) > + gpio_set_value(charger->chglev_pin, charger->chglev_value); > + > + switch (charger->input_voltage_threshold) { > + case 8000: > + value |= APCH_CFG_OVPSET_8V; > + break; > + case 7500: > + value |= APCH_CFG_OVPSET_7V5; > + break; > + case 7000: > + value |= APCH_CFG_OVPSET_7V; > + break; > + case 6600: > + default: > + value |= APCH_CFG_OVPSET_6V6; > + break; > + } > + > + switch (charger->pre_time_out) { > + case 60: > + value |= APCH_CFG_PRETIMO_60_MIN; > + break; > + case 80: > + value |= APCH_CFG_PRETIMO_80_MIN; > + break; > + case 0: > + value |= APCH_CFG_PRETIMO_DISABLED; > + break; > + case 40: > + default: > + value |= APCH_CFG_PRETIMO_40_MIN; > + break; > + } > + > + switch (charger->tolal_time_out) { > + case 4: > + value |= APCH_CFG_TOTTIMO_4_HOUR; > + break; > + case 5: > + value |= APCH_CFG_TOTTIMO_5_HOUR; > + break; > + case 0: > + value |= APCH_CFG_TOTTIMO_DISABLED; > + break; > + case 3: > + default: > + value |= APCH_CFG_TOTTIMO_3_HOUR; > + break; > + } > + > + return regmap_write(regmap, ACT8945A_APCH_CFG, value); > +} > + > +static int act8945a_charger_probe(struct platform_device *pdev) > +{ > + struct act8945a_dev *act8945a_dev = dev_get_drvdata(pdev->dev.parent); > + struct act8945a_charger *charger; > + struct power_supply_config psy_cfg = {}; > + int ret; > + > + charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); > + if (!charger) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, charger); > + > + charger->dev = &pdev->dev; > + charger->act8945a_dev = act8945a_dev; > + > + ret = act8945a_charger_parse_dt(&pdev->dev, charger); > + if (ret) > + return ret; > + > + ret = act8945a_charger_config(charger); > + if (ret) > + return ret; > + > + psy_cfg.of_node = pdev->dev.of_node; > + psy_cfg.drv_data = charger; > + > + charger->psy = devm_power_supply_register(&pdev->dev, > + &act8945a_charger_desc, > + &psy_cfg); > + if (IS_ERR(charger->psy)) { > + dev_err(act8945a_dev->dev, "failed to register power supply\n"); > + return PTR_ERR(charger->psy); > + } > + > + dev_info(act8945a_dev->dev, "charger driver registered\n"); > + > + return 0; > +} > + > +static int act8945a_charger_remove(struct platform_device *pdev) > +{ > + struct act8945a_charger *charger = platform_get_drvdata(pdev); > + > + power_supply_unregister(charger->psy); > The point of devm-like functions is to get rid of error and removal paths. This won't work... actually this should oops. Have you tested unbinding of driver? Best regards, Krzysztof From mboxrd@z Thu Jan 1 00:00:00 1970 From: k.kozlowski@samsung.com (Krzysztof Kozlowski) Date: Fri, 8 Jan 2016 21:17:20 +0900 Subject: [PATCH v2 1/2] power: act8945a: add charger driver for ACT8945A In-Reply-To: <1452242773-18887-2-git-send-email-wenyou.yang@atmel.com> References: <1452242773-18887-1-git-send-email-wenyou.yang@atmel.com> <1452242773-18887-2-git-send-email-wenyou.yang@atmel.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 2016-01-08 17:46 GMT+09:00 Wenyou Yang : > This patch adds new driver for Active-semi ACT8945A ActivePath > charger (part of ACT8945A MFD driver) providing power supply class > information to userspace. > > The driver is configured through DTS (battery and system related > settings) and sysfs entries (timers and input over-voltage threshold). > > Signed-off-by: Wenyou Yang > --- > > Changes in v2: > 1./ Substitute of_property_read_bool() for of_get_property(). > 2./ Substitute devm_power_supply_register() for power_supply_register(). > 3./ Use module_platform_driver(), instead of subsys_initcall(). > 4./ Substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2"). > > drivers/power/Kconfig | 7 + > drivers/power/Makefile | 1 + > drivers/power/act8945a_charger.c | 386 ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 394 insertions(+) > create mode 100644 drivers/power/act8945a_charger.c > > diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig > index 1ddd13c..ae75211 100644 > --- a/drivers/power/Kconfig > +++ b/drivers/power/Kconfig > @@ -75,6 +75,13 @@ config BATTERY_88PM860X > help > Say Y here to enable battery monitor for Marvell 88PM860x chip. > > +config BATTERY_ACT8945A > + tristate "Active-semi ACT8945A charger driver" > + depends on MFD_ACT8945A > + help > + Say Y here to enable support for power supply provided by > + Active-semi ActivePath ACT8945A charger. > + > config BATTERY_DS2760 > tristate "DS2760 battery driver (HP iPAQ & others)" > depends on W1 && W1_SLAVE_DS2760 > diff --git a/drivers/power/Makefile b/drivers/power/Makefile > index 0e4eab5..e46b75d 100644 > --- a/drivers/power/Makefile > +++ b/drivers/power/Makefile > @@ -17,6 +17,7 @@ obj-$(CONFIG_WM8350_POWER) += wm8350_power.o > obj-$(CONFIG_TEST_POWER) += test_power.o > > obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o > +obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o > obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o > obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o > obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o > diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c > new file mode 100644 > index 0000000..fe9c19f > --- /dev/null > +++ b/drivers/power/act8945a_charger.c > @@ -0,0 +1,386 @@ > +/* > + * Power supply driver for the Active-semi ACT8945A PMIC > + * > + * Copyright (C) 2015 Atmel Corporation > + * Wenyou Yang > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +static const char *act8945a_charger_model = "ACT8945A"; > +static const char *act8945a_charger_manufacturer = "Active-semi"; > + > +/** > + * ACT8945A Charger Register Map > + */ > + > +/* 0x70: Reserved */ > +#define ACT8945A_APCH_CFG 0x71 > +#define ACT8945A_APCH_STATUS 0x78 > +#define ACT8945A_APCH_CTRL 0x79 > +#define ACT8945A_APCH_STATE 0x7A > + > +/* ACT8945A_APCH_CFG */ > +#define APCH_CFG_OVPSET (0x03 << 0) > +#define APCH_CFG_OVPSET_6V6 (0x0 << 0) > +#define APCH_CFG_OVPSET_7V (0x1 << 0) > +#define APCH_CFG_OVPSET_7V5 (0x2 << 0) > +#define APCH_CFG_OVPSET_8V (0x3 << 0) > +#define APCH_CFG_PRETIMO (0x03 << 2) > +#define APCH_CFG_PRETIMO_40_MIN (0x0 << 2) > +#define APCH_CFG_PRETIMO_60_MIN (0x1 << 2) > +#define APCH_CFG_PRETIMO_80_MIN (0x2 << 2) > +#define APCH_CFG_PRETIMO_DISABLED (0x3 << 2) > +#define APCH_CFG_TOTTIMO (0x03 << 4) > +#define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4) > +#define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4) > +#define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4) > +#define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4) > +#define APCH_CFG_SUSCHG (0x01 << 7) > + > +#define APCH_STATUS_CHGDAT (0x01 << 0) > +#define APCH_STATUS_INDAT (0x01 << 1) > +#define APCH_STATUS_TEMPDAT (0x01 << 2) > +#define APCH_STATUS_TIMRDAT (0x01 << 3) > +#define APCH_STATUS_CHGSTAT (0x01 << 4) > +#define APCH_STATUS_INSTAT (0x01 << 5) > +#define APCH_STATUS_TEMPSTAT (0x01 << 6) > +#define APCH_STATUS_TIMRSTAT (0x01 << 7) > + > +#define APCH_CTRL_CHGEOCOUT (0x01 << 0) > +#define APCH_CTRL_INDIS (0x01 << 1) > +#define APCH_CTRL_TEMPOUT (0x01 << 2) > +#define APCH_CTRL_TIMRPRE (0x01 << 3) > +#define APCH_CTRL_CHGEOCIN (0x01 << 4) > +#define APCH_CTRL_INCON (0x01 << 5) > +#define APCH_CTRL_TEMPIN (0x01 << 6) > +#define APCH_CTRL_TIMRTOT (0x01 << 7) > + > +#define APCH_STATE_ACINSTAT (0x01 << 1) > +#define APCH_STATE_CSTATE (0x03 << 4) > +#define APCH_STATE_CSTATE_SHIFT 4 > +#define APCH_STATE_CSTATE_DISABLED 0x00 > +#define APCH_STATE_CSTATE_EOC 0x01 > +#define APCH_STATE_CSTATE_FAST 0x02 > +#define APCH_STATE_CSTATE_PRE 0x03 > + > +struct act8945a_charger { > + struct device *dev; > + struct act8945a_dev *act8945a_dev; > + struct power_supply *psy; > + > + u32 tolal_time_out; > + u32 pre_time_out; > + u32 input_voltage_threshold; > + bool battery_temperature; > + int chglev_pin; > + int chglev_value; > +}; > + > +static int act8945a_get_charger_state(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int status, state; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); > + if (ret < 0) > + return ret; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); > + if (ret < 0) > + return ret; > + > + state &= APCH_STATE_CSTATE; > + state >>= APCH_STATE_CSTATE_SHIFT; > + > + if (state == APCH_STATE_CSTATE_EOC) { > + if (status & APCH_STATUS_CHGDAT) > + *val = POWER_SUPPLY_STATUS_FULL; > + else > + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; > + } else if ((state == APCH_STATE_CSTATE_FAST) || > + (state == APCH_STATE_CSTATE_PRE)) { > + *val = POWER_SUPPLY_STATUS_CHARGING; > + } else { > + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; > + } > + > + return 0; > +} > + > +static int act8945a_get_charge_type(struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int state; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); > + if (ret < 0) > + return ret; > + > + state &= APCH_STATE_CSTATE; > + state >>= APCH_STATE_CSTATE_SHIFT; > + > + switch (state) { > + case APCH_STATE_CSTATE_PRE: > + *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; > + break; > + case APCH_STATE_CSTATE_FAST: > + *val = POWER_SUPPLY_CHARGE_TYPE_FAST; > + break; > + case APCH_STATE_CSTATE_EOC: > + case APCH_STATE_CSTATE_DISABLED: > + default: > + *val = POWER_SUPPLY_CHARGE_TYPE_NONE; > + } > + > + return 0; > +} > + > +static int act8945a_get_battery_health(struct act8945a_charger *charger, > + struct regmap *regmap, int *val) > +{ > + int ret; > + unsigned int status; > + > + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); > + if (ret < 0) > + return ret; > + > + if (charger->battery_temperature && !(status & APCH_STATUS_TEMPDAT)) > + *val = POWER_SUPPLY_HEALTH_OVERHEAT; > + else if (!(status & APCH_STATUS_INDAT)) > + *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; > + else if (status & APCH_STATUS_TIMRDAT) > + *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; > + else > + *val = POWER_SUPPLY_HEALTH_GOOD; > + > + return 0; > +} > + > +static enum power_supply_property act8945a_charger_props[] = { > + POWER_SUPPLY_PROP_STATUS, > + POWER_SUPPLY_PROP_CHARGE_TYPE, > + POWER_SUPPLY_PROP_TECHNOLOGY, > + POWER_SUPPLY_PROP_HEALTH, > + POWER_SUPPLY_PROP_MODEL_NAME, > + POWER_SUPPLY_PROP_MANUFACTURER > +}; > + > +static int act8945a_charger_get_property(struct power_supply *psy, > + enum power_supply_property prop, > + union power_supply_propval *val) > +{ > + struct act8945a_charger *charger = power_supply_get_drvdata(psy); > + struct regmap *regmap = charger->act8945a_dev->regmap; > + int ret = 0; > + > + switch (prop) { > + case POWER_SUPPLY_PROP_STATUS: > + ret = act8945a_get_charger_state(regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_CHARGE_TYPE: > + ret = act8945a_get_charge_type(regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_TECHNOLOGY: > + val->intval = POWER_SUPPLY_TECHNOLOGY_LION; > + break; > + case POWER_SUPPLY_PROP_HEALTH: > + ret = act8945a_get_battery_health(charger, > + regmap, &val->intval); > + break; > + case POWER_SUPPLY_PROP_MODEL_NAME: > + val->strval = act8945a_charger_model; > + break; > + case POWER_SUPPLY_PROP_MANUFACTURER: > + val->strval = act8945a_charger_manufacturer; > + break; > + default: > + return -EINVAL; > + } > + > + return ret; > +} > + > +static const struct power_supply_desc act8945a_charger_desc = { > + .name = "act8945a-charger", > + .type = POWER_SUPPLY_TYPE_BATTERY, > + .get_property = act8945a_charger_get_property, > + .properties = act8945a_charger_props, > + .num_properties = ARRAY_SIZE(act8945a_charger_props), > +}; > + > +#define DEFAULT_TOTAL_TIME_OUT 3 > +#define DEFAULT_PRE_TIME_OUT 40 > +#define DEFAULT_INPUT_OVP_THRESHOLD 6600 > + > +static int act8945a_charger_parse_dt(struct device *dev, > + struct act8945a_charger *charger) > +{ > + struct device_node *np = dev->of_node; > + enum of_gpio_flags flags; > + > + if (!np) { > + dev_err(dev, "no charger of node\n"); > + return -EINVAL; > + } > + > + charger->chglev_pin = of_get_named_gpio_flags(np, > + "active-semi,chglev-gpio", 0, &flags); > + > + charger->chglev_value = (flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1; > + > + charger->battery_temperature = of_property_read_bool(np, > + "active-semi,battery_temperature"); > + > + if (of_property_read_u32(np, "active-semi,input_voltage_threshold", > + &charger->input_voltage_threshold)) > + charger->input_voltage_threshold = DEFAULT_PRE_TIME_OUT; > + > + if (of_property_read_u32(np, "active-semi,precondition_timeout", > + &charger->pre_time_out)) > + charger->pre_time_out = DEFAULT_PRE_TIME_OUT; > + > + if (of_property_read_u32(np, "active-semi,total_timeout", > + &charger->tolal_time_out)) > + charger->tolal_time_out = DEFAULT_TOTAL_TIME_OUT; > + > + return 0; > +} > + > +static int act8945a_charger_config(struct act8945a_charger *charger) > +{ > + struct regmap *regmap = charger->act8945a_dev->regmap; > + u8 value = 0; > + > + if (gpio_is_valid(charger->chglev_pin)) > + gpio_set_value(charger->chglev_pin, charger->chglev_value); > + > + switch (charger->input_voltage_threshold) { > + case 8000: > + value |= APCH_CFG_OVPSET_8V; > + break; > + case 7500: > + value |= APCH_CFG_OVPSET_7V5; > + break; > + case 7000: > + value |= APCH_CFG_OVPSET_7V; > + break; > + case 6600: > + default: > + value |= APCH_CFG_OVPSET_6V6; > + break; > + } > + > + switch (charger->pre_time_out) { > + case 60: > + value |= APCH_CFG_PRETIMO_60_MIN; > + break; > + case 80: > + value |= APCH_CFG_PRETIMO_80_MIN; > + break; > + case 0: > + value |= APCH_CFG_PRETIMO_DISABLED; > + break; > + case 40: > + default: > + value |= APCH_CFG_PRETIMO_40_MIN; > + break; > + } > + > + switch (charger->tolal_time_out) { > + case 4: > + value |= APCH_CFG_TOTTIMO_4_HOUR; > + break; > + case 5: > + value |= APCH_CFG_TOTTIMO_5_HOUR; > + break; > + case 0: > + value |= APCH_CFG_TOTTIMO_DISABLED; > + break; > + case 3: > + default: > + value |= APCH_CFG_TOTTIMO_3_HOUR; > + break; > + } > + > + return regmap_write(regmap, ACT8945A_APCH_CFG, value); > +} > + > +static int act8945a_charger_probe(struct platform_device *pdev) > +{ > + struct act8945a_dev *act8945a_dev = dev_get_drvdata(pdev->dev.parent); > + struct act8945a_charger *charger; > + struct power_supply_config psy_cfg = {}; > + int ret; > + > + charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); > + if (!charger) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, charger); > + > + charger->dev = &pdev->dev; > + charger->act8945a_dev = act8945a_dev; > + > + ret = act8945a_charger_parse_dt(&pdev->dev, charger); > + if (ret) > + return ret; > + > + ret = act8945a_charger_config(charger); > + if (ret) > + return ret; > + > + psy_cfg.of_node = pdev->dev.of_node; > + psy_cfg.drv_data = charger; > + > + charger->psy = devm_power_supply_register(&pdev->dev, > + &act8945a_charger_desc, > + &psy_cfg); > + if (IS_ERR(charger->psy)) { > + dev_err(act8945a_dev->dev, "failed to register power supply\n"); > + return PTR_ERR(charger->psy); > + } > + > + dev_info(act8945a_dev->dev, "charger driver registered\n"); > + > + return 0; > +} > + > +static int act8945a_charger_remove(struct platform_device *pdev) > +{ > + struct act8945a_charger *charger = platform_get_drvdata(pdev); > + > + power_supply_unregister(charger->psy); > The point of devm-like functions is to get rid of error and removal paths. This won't work... actually this should oops. Have you tested unbinding of driver? Best regards, Krzysztof