Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753295AbbHROe1 (ORCPT ); Tue, 18 Aug 2015 10:34:27 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:38773 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753240AbbHROe0 (ORCPT ); Tue, 18 Aug 2015 10:34:26 -0400 Date: Tue, 18 Aug 2015 09:24:44 -0500 From: Andreas Dannenberg To: Ramakrishna Pallala CC: , , Sebastian Reichel , Jenny Tc Subject: Re: [RFC PATCH] power: bq24261_charger: Add support for TI BQ24261 charger Message-ID: <20150818142442.GA11344@borg> References: <1439920175-12049-1-git-send-email-ramakrishna.pallala@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <1439920175-12049-1-git-send-email-ramakrishna.pallala@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [128.247.8.15] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 38149 Lines: 1255 Hi, On Tue, Aug 18, 2015 at 11:19:35PM +0530, Ramakrishna Pallala wrote: > Add new charger driver support for BQ24261 charger IC. > > Signed-off-by: Ramakrishna Pallala > --- > drivers/power/Kconfig | 6 + > drivers/power/Makefile | 1 + > drivers/power/bq24261_charger.c | 1127 +++++++++++++++++++++++++++++++++ > include/linux/power/bq24261_charger.h | 26 + > 4 files changed, 1160 insertions(+) > create mode 100644 drivers/power/bq24261_charger.c > create mode 100644 include/linux/power/bq24261_charger.h > > diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig > index 08beeed..9bda940 100644 > --- a/drivers/power/Kconfig > +++ b/drivers/power/Kconfig > @@ -395,6 +395,12 @@ config CHARGER_BQ24190 > help > Say Y to enable support for the TI BQ24190 battery charger. > > +config CHARGER_BQ24261 > + tristate "TI BQ24261 charger driver" > + depends on I2C && EXTCON > + help > + Say Y here to enable support for TI BQ24261 battery charger. > + > config CHARGER_BQ24257 > tristate "TI BQ24257 battery charger driver" > depends on I2C && GPIOLIB > diff --git a/drivers/power/Makefile b/drivers/power/Makefile > index 5752ce8..bec8409 100644 > --- a/drivers/power/Makefile > +++ b/drivers/power/Makefile > @@ -59,6 +59,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o > obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o > obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o > obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o > +obj-$(CONFIG_CHARGER_BQ24261) += bq24261_charger.o > obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o > obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o > obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o > diff --git a/drivers/power/bq24261_charger.c b/drivers/power/bq24261_charger.c > new file mode 100644 > index 0000000..b96d7a3 > --- /dev/null > +++ b/drivers/power/bq24261_charger.c > @@ -0,0 +1,1127 @@ > +/* > + * bq24261_charger.c - BQ24261 Charger driver > + * > + * Copyright (C) 2014 Intel Corporation > + * Author: Jenny TC > + * Ramakrishna Pallala > + * > + * 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. > + * > + * 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 > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define DEV_NAME "bq24261_charger" > + > +#define EXCEPTION_MONITOR_DELAY (60 * HZ) > +#define WDT_RESET_DELAY (15 * HZ) > + > +/* BQ24261 registers */ > +#define BQ24261_STAT_CTRL0_ADDR 0x00 > +#define BQ24261_CTRL_ADDR 0x01 > +#define BQ24261_BATT_VOL_CTRL_ADDR 0x02 > +#define BQ24261_VENDOR_REV_ADDR 0x03 > +#define BQ24261_TERM_FCC_ADDR 0x04 > +#define BQ24261_VINDPM_STAT_ADDR 0x05 > +#define BQ24261_ST_NTC_MON_ADDR 0x06 > + > +#define BQ24261_RESET_MASK (0x01 << 7) > +#define BQ24261_RESET_ENABLE (0x01 << 7) > + > +#define BQ24261_FAULT_MASK 0x07 > +#define BQ24261_STAT_MASK (0x03 << 4) > +#define BQ24261_BOOST_MASK (0x01 << 6) > +#define BQ24261_TMR_RST_MASK (0x01 << 7) > +#define BQ24261_TMR_RST (0x01 << 7) > + > +#define BQ24261_ENABLE_BOOST (0x01 << 6) > + > +#define BQ24261_VOVP 0x01 > +#define BQ24261_LOW_SUPPLY 0x02 > +#define BQ24261_THERMAL_SHUTDOWN 0x03 > +#define BQ24261_BATT_TEMP_FAULT 0x04 > +#define BQ24261_TIMER_FAULT 0x05 > +#define BQ24261_BATT_OVP 0x06 > +#define BQ24261_NO_BATTERY 0x07 > +#define BQ24261_STAT_READY 0x00 > + > +#define BQ24261_STAT_CHRG_PRGRSS (0x01 << 4) > +#define BQ24261_STAT_CHRG_DONE (0x02 << 4) > +#define BQ24261_STAT_FAULT (0x03 << 4) > + > +#define BQ24261_CE_MASK (0x01 << 1) > +#define BQ24261_CE_DISABLE (0x01 << 1) > + > +#define BQ24261_HiZ_MASK (0x01) > +#define BQ24261_HiZ_ENABLE (0x01) > + > +#define BQ24261_ICHRG_MASK (0x1F << 3) > + > +#define BQ24261_ITERM_MASK (0x03) > +#define BQ24261_MIN_ITERM 50 /* 50 mA */ > +#define BQ24261_MAX_ITERM 300 /* 300 mA */ > + > +#define BQ24261_VBREG_MASK (0x3F << 2) > +#define BQ24261_VBREG_MIN_CV 3500 > +#define BQ24261_VBREG_MAX_CV 4440 > +#define BQ24261_VBREG_CV_DIV 20 > +#define BQ24261_VBREG_CV_BIT_POS 2 > + > +#define BQ24261_INLMT_MASK (0x07 << 4) > +#define BQ24261_INLMT_100 0x00 > +#define BQ24261_INLMT_150 (0x01 << 4) > +#define BQ24261_INLMT_500 (0x02 << 4) > +#define BQ24261_INLMT_900 (0x03 << 4) > +#define BQ24261_INLMT_1500 (0x04 << 4) > +#define BQ24261_INLMT_2000 (0x05 << 4) > +#define BQ24261_INLMT_2500 (0x06 << 4) > + > +#define BQ24261_TE_MASK (0x01 << 2) > +#define BQ24261_TE_ENABLE (0x01 << 2) > +#define BQ24261_STAT_ENABLE_MASK (0x01 << 3) > +#define BQ24261_STAT_ENABLE (0x01 << 3) > + > +#define BQ24261_VENDOR_MASK (0x07 << 5) > +#define BQ24261_PART_MASK (0x03 << 3) > +#define BQ24261_REV_MASK (0x07) > +#define VENDOR_BQ2426X (0x02 << 5) > +#define REV_BQ24261 (0x06) > + > +#define BQ24261_TS_MASK (0x01 << 3) > +#define BQ24261_TS_ENABLED (0x01 << 3) > +#define BQ24261_BOOST_ILIM_MASK (0x01 << 4) > +#define BQ24261_BOOST_ILIM_500ma (0x0) > +#define BQ24261_BOOST_ILIM_1A (0x01 << 4) > +#define BQ24261_VINDPM_OFF_MASK (0x01 << 0) > +#define BQ24261_VINDPM_OFF_5V (0x0) > +#define BQ24261_VINDPM_OFF_12V (0x01 << 0) > + > +#define BQ24261_SAFETY_TIMER_MASK (0x03 << 5) > +#define BQ24261_SAFETY_TIMER_40MIN 0x00 > +#define BQ24261_SAFETY_TIMER_6HR (0x01 << 5) > +#define BQ24261_SAFETY_TIMER_9HR (0x02 << 5) > +#define BQ24261_SAFETY_TIMER_DISABLED (0x03 << 5) > + > +/* 1% above voltage max design to report over voltage */ > +#define BQ24261_OVP_MULTIPLIER 1010 > +#define BQ24261_OVP_RECOVER_MULTIPLIER 990 > +#define BQ24261_DEF_BAT_VOLT_MAX_DESIGN 4200000 > + > +/* Settings for Voltage / DPPM Register (05) */ > +#define BQ24261_VBATT_LEVEL1 3700000 > +#define BQ24261_VBATT_LEVEL2 3960000 > +#define BQ24261_VINDPM_MASK (0x07) > +#define BQ24261_VINDPM_320MV (0x01 << 2) > +#define BQ24261_VINDPM_160MV (0x01 << 1) > +#define BQ24261_VINDPM_80MV (0x01 << 0) > +#define BQ24261_CD_STATUS_MASK (0x01 << 3) > +#define BQ24261_DPM_EN_MASK (0x01 << 4) > +#define BQ24261_DPM_EN_FORCE (0x01 << 4) > +#define BQ24261_LOW_CHG_MASK (0x01 << 5) > +#define BQ24261_LOW_CHG_EN (0x01 << 5) > +#define BQ24261_LOW_CHG_DIS (~BQ24261_LOW_CHG_EN) > +#define BQ24261_DPM_STAT_MASK (0x01 << 6) > +#define BQ24261_MINSYS_STAT_MASK (0x01 << 7) > + > +#define BQ24261_MIN_CC 500 /* 500mA */ > +#define BQ24261_MAX_CC 3000 /* 3A */ > +#define BQ24261_DEF_CC 1300 /* 1300mA */ > +#define BQ24261_MAX_CV 4350 /*4350mV */ > +#define BQ24261_DEF_CV 4350 /* 4350mV */ > +#define BQ24261_DEF_ITERM 128 /* 128mA */ > +#define BQ24261_MIN_TEMP 0 /* 0 degC */ > +#define BQ24261_MAX_TEMP 60 /* 60 DegC */ > + > +#define ILIM_100MA 100 /* 100mA */ > +#define ILIM_500MA 500 /* 500mA */ > +#define ILIM_900MA 900 /* 900mA */ > +#define ILIM_1500MA 1500 /* 1500mA */ > +#define ILIM_2000MA 2000 /* 2000mA */ > +#define ILIM_2500MA 2500 /* 2500mA */ > +#define ILIM_3000MA 3000 /* 3000mA */ > + > +u16 bq24261_inlmt[][2] = { > + {100, BQ24261_INLMT_100}, > + {150, BQ24261_INLMT_150}, > + {500, BQ24261_INLMT_500}, > + {900, BQ24261_INLMT_900}, > + {1500, BQ24261_INLMT_1500}, > + {2000, BQ24261_INLMT_2000}, > + {2500, BQ24261_INLMT_2500}, > +}; > + > + > +enum bq24261_status { > + BQ24261_CHRGR_STAT_UNKNOWN, > + BQ24261_CHRGR_STAT_READY, > + BQ24261_CHRGR_STAT_CHARGING, > + BQ24261_CHRGR_STAT_FULL, > + BQ24261_CHRGR_STAT_FAULT, > +}; > + > +enum bq2426x_model { > + BQ2426X = 0, > + BQ24260, > + BQ24261, > +}; > + > +struct bq24261_charger { > + struct i2c_client *client; > + struct bq24261_platform_data *pdata; > + struct power_supply *psy_usb; > + struct delayed_work fault_mon_work; > + struct mutex lock; > + enum bq2426x_model model; > + struct delayed_work wdt_work; > + struct work_struct irq_work; > + struct list_head irq_queue; > + > + /* extcon charger cables */ > + struct { > + struct work_struct work; > + struct notifier_block nb; > + struct extcon_specific_cable_nb sdp; > + struct extcon_specific_cable_nb cdp; > + struct extcon_specific_cable_nb dcp; > + struct extcon_specific_cable_nb otg; > + enum power_supply_type chg_type; > + bool boost; > + bool connected; > + } cable; > + > + bool online; > + bool present; > + int chg_health; > + enum bq24261_status chg_status; > + int cc; > + int cv; > + int inlmt; > + int max_cc; > + int max_cv; > + int iterm; > + int max_temp; > + int min_temp; > + bool is_charging_enabled; > +}; > + > +static inline int bq24261_read_reg(struct i2c_client *client, u8 reg) > +{ > + int ret; > + > + ret = i2c_smbus_read_byte_data(client, reg); > + if (ret < 0) > + dev_err(&client->dev, > + "error(%d) in reading reg %d\n", ret, reg); > + return ret; > +} > + > +static inline int bq24261_write_reg(struct i2c_client *client, u8 reg, u8 data) > +{ > + int ret; > + > + ret = i2c_smbus_write_byte_data(client, reg, data); > + if (ret < 0) > + dev_err(&client->dev, > + "error(%d) in writing %d to reg %d\n", ret, data, reg); > + return ret; > +} > + > +static inline int bq24261_update_reg(struct i2c_client *client, u8 reg, > + u8 mask, u8 val) > +{ > + int ret; > + > + ret = bq24261_read_reg(client, reg); > + if (ret < 0) > + return ret; > + > + ret = (ret & ~mask) | (mask & val); > + return bq24261_write_reg(client, reg, ret); > +} > + > +static void lookup_regval(u16 tbl[][2], size_t size, u16 in_val, u8 *out_val) > +{ > + int i; > + > + for (i = 1; i < size; ++i) { > + if (in_val < tbl[i][0]) > + break; > + } > + > + *out_val = (u8) tbl[i - 1][1]; > +} > + > +void bq24261_cc_to_reg(int cc, u8 *reg_val) > +{ > + /* Ichrg bits are B3-B7 > + * Icharge = 500mA + IchrgCode * 100mA > + */ > + cc = clamp_t(int, cc, BQ24261_MIN_CC, BQ24261_MAX_CC); > + cc = cc - BQ24261_MIN_CC; > + *reg_val = (cc / 100) << 3; > +} > + > +void bq24261_cv_to_reg(int cv, u8 *reg_val) > +{ > + int val; > + > + val = clamp_t(int, cv, BQ24261_VBREG_MIN_CV, BQ24261_VBREG_MAX_CV); > + *reg_val = (((val - BQ24261_VBREG_MIN_CV) / BQ24261_VBREG_CV_DIV) > + << BQ24261_VBREG_CV_BIT_POS); > +} > + > +void bq24261_inlmt_to_reg(int inlmt, u8 *regval) > +{ > + return lookup_regval(bq24261_inlmt, ARRAY_SIZE(bq24261_inlmt), > + inlmt, regval); > +} > + > +static inline void bq24261_iterm_to_reg(int iterm, u8 *regval) > +{ > + /* Iterm bits are B0-B2 > + * Icharge = 50mA + ItermCode * 50mA > + */ > + iterm = clamp_t(int, iterm, BQ24261_MIN_ITERM, BQ24261_MAX_ITERM); > + iterm = iterm - BQ24261_MIN_ITERM; > + *regval = iterm / 50; > +} > + > +static inline int bq24261_init_timers(struct bq24261_charger *chip) > +{ > + u8 reg_val; > + int ret; > + > + reg_val = BQ24261_SAFETY_TIMER_9HR; > + > + if (chip->pdata->thermal_sensing) > + reg_val |= BQ24261_TS_ENABLED; > + > + ret = bq24261_update_reg(chip->client, BQ24261_ST_NTC_MON_ADDR, > + BQ24261_TS_MASK | BQ24261_SAFETY_TIMER_MASK | > + BQ24261_BOOST_ILIM_MASK, reg_val); > + > + return ret; > +} > + > +static inline int bq24261_reset_wdt_timer(struct bq24261_charger *chip) > +{ > + u8 mask = BQ24261_TMR_RST_MASK, val = BQ24261_TMR_RST; > + > + if (chip->cable.boost) { > + mask |= BQ24261_BOOST_MASK; > + val |= BQ24261_ENABLE_BOOST; > + } > + > + return bq24261_update_reg(chip->client, BQ24261_STAT_CTRL0_ADDR, > + mask, val); > +} > + > +static inline int bq24261_set_cc(struct bq24261_charger *chip, int cc_mA) > +{ > + u8 reg_val; > + int ret; > + > + dev_dbg(&chip->client->dev, "%s=%d\n", __func__, cc_mA); > + > + if (cc_mA && (cc_mA < BQ24261_MIN_CC)) { > + dev_dbg(&chip->client->dev, "Set LOW_CHG bit\n"); > + reg_val = BQ24261_LOW_CHG_EN; > + ret = bq24261_update_reg(chip->client, > + BQ24261_VINDPM_STAT_ADDR, > + BQ24261_LOW_CHG_MASK, reg_val); > + return ret; > + } > + > + reg_val = BQ24261_LOW_CHG_DIS; > + ret = bq24261_update_reg(chip->client, BQ24261_VINDPM_STAT_ADDR, > + BQ24261_LOW_CHG_MASK, reg_val); > + > + bq24261_cc_to_reg(cc_mA, ®_val); > + > + return bq24261_update_reg(chip->client, BQ24261_TERM_FCC_ADDR, > + BQ24261_ICHRG_MASK, reg_val); > +} > + > +static inline int bq24261_set_cv(struct bq24261_charger *chip, int cv_mV) > +{ > + u8 reg_val; > + > + dev_dbg(&chip->client->dev, "%s=%d\n", __func__, cv_mV); > + > + bq24261_cv_to_reg(cv_mV, ®_val); > + > + return bq24261_update_reg(chip->client, BQ24261_BATT_VOL_CTRL_ADDR, > + BQ24261_VBREG_MASK, reg_val); > +} > + > +static inline int bq24261_set_inlmt(struct bq24261_charger *chip, int inlmt) > +{ > + u8 reg_val; > + > + dev_dbg(&chip->client->dev, "%s=%d\n", __func__, inlmt); > + > + bq24261_inlmt_to_reg(inlmt, ®_val); > + > + /* > + * Don't enable reset bit. Setting this > + * bit will reset all the registers/ > + */ > + reg_val &= ~BQ24261_RESET_MASK; > + > + return bq24261_update_reg(chip->client, BQ24261_CTRL_ADDR, > + BQ24261_RESET_MASK|BQ24261_INLMT_MASK, reg_val); > + > +} > + > +static inline int bq24261_set_iterm(struct bq24261_charger *chip, int iterm) > +{ > + u8 reg_val; > + > + bq24261_iterm_to_reg(iterm, ®_val); > + > + return bq24261_update_reg(chip->client, BQ24261_TERM_FCC_ADDR, > + BQ24261_ITERM_MASK, reg_val); > +} > + > +static inline int bq24261_enable_charging(struct bq24261_charger *chip, > + bool enable) > +{ > + int ret; > + u8 reg_val; > + > + if (enable) { > + reg_val = (~BQ24261_CE_DISABLE & BQ24261_CE_MASK); > + reg_val |= BQ24261_TE_ENABLE; > + } else { > + reg_val = BQ24261_CE_DISABLE; > + } > + > + reg_val |= BQ24261_STAT_ENABLE; > + > + /* > + * Don't enable reset bit. Setting this > + * bit will reset all the registers/ > + */ > + reg_val &= ~BQ24261_RESET_MASK; > + > + ret = bq24261_update_reg(chip->client, BQ24261_CTRL_ADDR, > + BQ24261_STAT_ENABLE_MASK|BQ24261_RESET_MASK| > + BQ24261_CE_MASK|BQ24261_TE_MASK, > + reg_val); > + if (ret || !enable) > + return ret; > + > + /* Set termination current */ > + ret = bq24261_set_iterm(chip, chip->iterm); > + if (ret < 0) > + dev_err(&chip->client->dev, "failed to set iTerm(%d)\n", ret); > + > + /* Start WDT and Safety timers */ > + ret = bq24261_init_timers(chip); > + if (ret) > + dev_err(&chip->client->dev, "failed to set timers(%d)\n", ret); > + > + return ret; > +} > + > +static inline int bq24261_enable_charger(struct bq24261_charger *chip, > + int enable) > +{ > + u8 reg_val; > + int ret; > + > + reg_val = enable ? (~BQ24261_HiZ_ENABLE & BQ24261_HiZ_MASK) : > + BQ24261_HiZ_ENABLE; > + > + /* > + * Don't enable reset bit. Setting this > + * bit will reset all the registers/ > + */ > + reg_val &= ~BQ24261_RESET_MASK; > + > + ret = bq24261_update_reg(chip->client, BQ24261_CTRL_ADDR, > + BQ24261_HiZ_MASK|BQ24261_RESET_MASK, reg_val); > + if (ret) > + return ret; > + > + return bq24261_reset_wdt_timer(chip); > +} > + > +static void bq24261_handle_health(struct bq24261_charger *chip, u8 stat_reg) > +{ > + struct i2c_client *client = chip->client; > + bool fault_worker = false; > + > + switch (stat_reg & BQ24261_FAULT_MASK) { > + case BQ24261_VOVP: > + chip->chg_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; > + fault_worker = true; > + dev_err(&client->dev, "Charger Over Voltage Fault\n"); > + break; > + case BQ24261_LOW_SUPPLY: > + chip->chg_health = POWER_SUPPLY_HEALTH_DEAD; > + fault_worker = true; > + dev_err(&client->dev, "Charger Low Supply Fault\n"); > + break; > + case BQ24261_THERMAL_SHUTDOWN: > + chip->chg_health = POWER_SUPPLY_HEALTH_OVERHEAT; > + dev_err(&client->dev, "Charger Thermal Fault\n"); > + break; > + case BQ24261_BATT_TEMP_FAULT: > + dev_err(&client->dev, "Battery Temperature Fault\n"); > + break; > + case BQ24261_TIMER_FAULT: > + chip->chg_health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; > + dev_err(&client->dev, "Charger Timer Fault\n"); > + break; > + case BQ24261_BATT_OVP: > + chip->chg_health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; > + dev_err(&client->dev, "Battery Over Voltage Fault\n"); > + break; > + case BQ24261_NO_BATTERY: > + dev_err(&client->dev, "No Battery Connected\n"); > + break; > + default: > + chip->chg_health = POWER_SUPPLY_HEALTH_GOOD; > + } > + > + if (fault_worker) > + schedule_delayed_work(&chip->fault_mon_work, > + EXCEPTION_MONITOR_DELAY); > +} > + > +static void bq24261_handle_status(struct bq24261_charger *chip, u8 stat_reg) > +{ > + struct i2c_client *client = chip->client; > + > + switch (stat_reg & BQ24261_STAT_MASK) { > + case BQ24261_STAT_READY: > + chip->chg_status = BQ24261_CHRGR_STAT_READY; > + dev_info(&client->dev, "Charger Status: Ready\n"); > + break; > + case BQ24261_STAT_CHRG_PRGRSS: > + chip->chg_status = BQ24261_CHRGR_STAT_CHARGING; > + dev_info(&client->dev, "Charger Status: Charge Progress\n"); > + break; > + case BQ24261_STAT_CHRG_DONE: > + chip->chg_status = BQ24261_CHRGR_STAT_FULL; > + dev_info(&client->dev, "Charger Status: Charge Done\n"); > + break; > + case BQ24261_STAT_FAULT: > + chip->chg_status = BQ24261_CHRGR_STAT_FAULT; > + dev_warn(&client->dev, "Charger Status: Fault\n"); > + break; > + default: > + dev_info(&client->dev, "Invalid\n"); > + } > +} > + > +static int bq24261_get_charger_health(struct bq24261_charger *chip) > +{ > + if (!chip->present) > + return POWER_SUPPLY_HEALTH_UNKNOWN; > + > + return chip->chg_health; > +} > + > +static int bq24261_get_charging_status(struct bq24261_charger *chip) > +{ > + int status; > + > + if (!chip->present) > + return POWER_SUPPLY_STATUS_DISCHARGING; > + > + switch (chip->chg_status) { > + case BQ24261_CHRGR_STAT_READY: > + status = POWER_SUPPLY_STATUS_DISCHARGING; > + break; > + case BQ24261_CHRGR_STAT_CHARGING: > + status = POWER_SUPPLY_STATUS_CHARGING; > + break; > + case BQ24261_CHRGR_STAT_FULL: > + status = POWER_SUPPLY_STATUS_FULL; > + break; > + case BQ24261_CHRGR_STAT_FAULT: > + status = POWER_SUPPLY_STATUS_NOT_CHARGING; > + break; > + default: > + status = POWER_SUPPLY_STATUS_DISCHARGING; > + } > + > + return status; > +} > + > +static int bq24261_usb_get_property(struct power_supply *psy, > + enum power_supply_property psp, union power_supply_propval *val) > +{ > + struct bq24261_charger *chip = power_supply_get_drvdata(psy); > + > + mutex_lock(&chip->lock); > + switch (psp) { > + case POWER_SUPPLY_PROP_PRESENT: > + val->intval = chip->present; > + break; > + case POWER_SUPPLY_PROP_ONLINE: > + val->intval = chip->online; > + break; > + case POWER_SUPPLY_PROP_HEALTH: > + val->intval = bq24261_get_charger_health(chip); > + break; > + case POWER_SUPPLY_PROP_STATUS: > + val->intval = bq24261_get_charging_status(chip); > + break; > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: > + val->intval = chip->pdata->max_cc * 1000; > + break; > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: > + val->intval = chip->pdata->max_cv * 1000; > + break; > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: > + val->intval = chip->cc * 1000; > + break; > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > + val->intval = chip->cv * 1000; > + break; > + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: > + val->intval = chip->inlmt * 1000; > + break; > + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: > + val->intval = chip->iterm * 1000; > + break; > + case POWER_SUPPLY_PROP_TEMP_MAX: > + val->intval = chip->pdata->max_temp * 10; > + break; > + case POWER_SUPPLY_PROP_TEMP_MIN: > + val->intval = chip->pdata->min_temp * 10; > + break; > + default: > + mutex_unlock(&chip->lock); > + return -EINVAL; > + } > + mutex_unlock(&chip->lock); > + > + return 0; > +} > + > +static int bq24261_usb_set_property(struct power_supply *psy, > + enum power_supply_property psp, const union power_supply_propval *val) > +{ > + struct bq24261_charger *chip = power_supply_get_drvdata(psy); > + int ret = 0; > + > + mutex_lock(&chip->lock); > + switch (psp) { > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: > + ret = bq24261_set_cc(chip, (val->intval / 1000)); > + if (!ret) > + chip->cc = val->intval; > + break; > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > + ret = bq24261_set_cv(chip, (val->intval / 1000)); > + if (!ret) > + chip->cv = val->intval; > + break; > + default: > + ret = -EINVAL; > + } > + mutex_unlock(&chip->lock); > + > + return ret; > +} > + > +static int bq24261_property_is_writeable(struct power_supply *psy, > + enum power_supply_property psp) > +{ > + int ret; > + > + switch (psp) { > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > + ret = 1; > + break; > + default: > + ret = 0; > + } > + > + return ret; > +} Thanks Ram for submitting your driver. I think it's a good base to merge my (unplished) work supporting the bq24261M and bq24262. Laurentiu and I were having an offline discussion whether to make the above constant charge current / voltage writable through sysfs on the bq24257_charger.c driver as I'm merging my bq24250/bq24251 work there. While helpful for debugging and to empower certain user-space applications those properties also are somewhat dangerous to expose at the same time if an unskilled user gets hold of them... (Thanks Laurentiu for digging up below thread) http://marc.info/?l=linux-pm&m=143080413218161&w=2 In this context I was thinking, what about introducing a DT property for this and other charger drivers called "batt_param_write_enable" that by default is OFF and controls the writability of above two parameters? I think this would add one layer of safety while at the same time allowing more flexibility for where it's needed. (more comments below) > + > +static enum power_supply_property bq24261_usb_props[] = { > + POWER_SUPPLY_PROP_PRESENT, > + POWER_SUPPLY_PROP_ONLINE, > + POWER_SUPPLY_PROP_TYPE, > + POWER_SUPPLY_PROP_HEALTH, > + POWER_SUPPLY_PROP_STATUS, > + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, > + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, > + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, > + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, > + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, > + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, > + POWER_SUPPLY_PROP_TEMP_MAX, > + POWER_SUPPLY_PROP_TEMP_MIN, > +}; > + > +static char *bq24261_charger_supplied_to[] = { > + "main-battery", > +}; > + > +static struct power_supply_desc bq24261_charger_desc = { > + .name = DEV_NAME, > + .type = POWER_SUPPLY_TYPE_USB, > + .properties = bq24261_usb_props, > + .num_properties = ARRAY_SIZE(bq24261_usb_props), > + .get_property = bq24261_usb_get_property, > + .set_property = bq24261_usb_set_property, > + .property_is_writeable = bq24261_property_is_writeable, > +}; > + > +static void bq24261_wdt_reset_worker(struct work_struct *work) > +{ > + > + struct bq24261_charger *chip = container_of(work, > + struct bq24261_charger, wdt_work.work); > + int ret; > + > + ret = bq24261_reset_wdt_timer(chip); > + if (ret) > + dev_err(&chip->client->dev, "WDT timer reset error(%d)\n", ret); > + > + schedule_delayed_work(&chip->wdt_work, WDT_RESET_DELAY); > +} > + > +static void bq24261_irq_worker(struct work_struct *work) > +{ > + struct bq24261_charger *chip = > + container_of(work, struct bq24261_charger, irq_work); > + int ret; > + > + /* > + * Lock to ensure that interrupt register readings are done > + * and processed sequentially. The interrupt Fault registers > + * are read on clear and without sequential processing double > + * fault interrupts or fault recovery cannot be handlled propely > + */ > + > + mutex_lock(&chip->lock); > + > + ret = bq24261_read_reg(chip->client, BQ24261_STAT_CTRL0_ADDR); > + if (ret < 0) { > + dev_err(&chip->client->dev, > + "Error (%d) in reading BQ24261_STAT_CTRL0_ADDR\n", ret); > + goto irq_out; > + } > + > + if (!chip->cable.boost) { > + bq24261_handle_status(chip, ret); > + bq24261_handle_health(chip, ret); > + power_supply_changed(chip->psy_usb); > + } > + > +irq_out: > + mutex_unlock(&chip->lock); > +} > + > +static irqreturn_t bq24261_thread_handler(int id, void *data) > +{ > + struct bq24261_charger *chip = (struct bq24261_charger *)data; > + > + queue_work(system_highpri_wq, &chip->irq_work); > + return IRQ_HANDLED; > +} > + > +static void bq24261_fault_mon_work(struct work_struct *work) > +{ > + struct bq24261_charger *chip = container_of(work, > + struct bq24261_charger, fault_mon_work.work); > + int ret; > + > + if ((chip->chg_health == POWER_SUPPLY_HEALTH_OVERVOLTAGE) || > + (chip->chg_health == POWER_SUPPLY_HEALTH_DEAD)) { > + > + mutex_lock(&chip->lock); > + ret = bq24261_read_reg(chip->client, BQ24261_STAT_CTRL0_ADDR); > + if (ret < 0) { > + dev_err(&chip->client->dev, > + "Status register read failed(%d)\n", ret); > + goto fault_mon_out; > + } > + > + if ((ret & BQ24261_STAT_MASK) == BQ24261_STAT_READY) { > + dev_info(&chip->client->dev, > + "Charger fault recovered\n"); > + bq24261_handle_status(chip, ret); > + bq24261_handle_health(chip, ret); > + power_supply_changed(chip->psy_usb); > + } > +fault_mon_out: > + mutex_unlock(&chip->lock); > + } > +} > + > +static void bq24261_boost_control(struct bq24261_charger *chip, bool enable) > +{ > + int ret; > + > + if (enable) > + ret = bq24261_write_reg(chip->client, BQ24261_STAT_CTRL0_ADDR, > + BQ24261_TMR_RST | BQ24261_ENABLE_BOOST); > + else > + ret = bq24261_write_reg(chip->client, > + BQ24261_STAT_CTRL0_ADDR, 0x0); > + > + if (ret < 0) > + dev_err(&chip->client->dev, > + "stat cntl0 reg access error(%d)\n", ret); > +} > + > +static void bq24261_extcon_event_work(struct work_struct *work) > +{ > + struct bq24261_charger *chip = > + container_of(work, struct bq24261_charger, cable.work); > + int ret, current_limit = 0; > + bool old_connected = chip->cable.connected; > + > + /* Determine cable/charger type */ > + if (extcon_get_cable_state(chip->cable.sdp.edev, > + "SLOW-CHARGER") > 0) { > + chip->cable.connected = true; > + current_limit = ILIM_500MA; > + chip->cable.chg_type = POWER_SUPPLY_TYPE_USB; > + dev_dbg(&chip->client->dev, "USB SDP charger is connected"); > + } else if (extcon_get_cable_state(chip->cable.cdp.edev, > + "CHARGE-DOWNSTREAM") > 0) { > + chip->cable.connected = true; > + current_limit = ILIM_1500MA; > + chip->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP; > + dev_dbg(&chip->client->dev, "USB CDP charger is connected"); > + } else if (extcon_get_cable_state(chip->cable.dcp.edev, > + "FAST-CHARGER") > 0) { > + chip->cable.connected = true; > + current_limit = ILIM_1500MA; > + chip->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP; > + dev_dbg(&chip->client->dev, "USB DCP charger is connected"); > + } else if (extcon_get_cable_state(chip->cable.otg.edev, > + "USB-Host") > 0) { > + chip->cable.boost = true; > + chip->cable.connected = true; > + dev_dbg(&chip->client->dev, "USB-Host cable is connected"); > + } else { > + if (old_connected) > + dev_dbg(&chip->client->dev, "USB Cable disconnected"); > + chip->cable.connected = false; > + chip->cable.boost = false; > + chip->cable.chg_type = POWER_SUPPLY_TYPE_USB; > + } > + > + /* Cable status changed */ > + if (old_connected == chip->cable.connected) > + return; > + > + mutex_lock(&chip->lock); > + if (chip->cable.connected && !chip->cable.boost) { > + chip->inlmt = current_limit; > + /* Set up charging */ > + ret = bq24261_set_cc(chip, chip->cc); > + if (ret < 0) > + dev_err(&chip->client->dev, "set CC failed(%d)", ret); > + ret = bq24261_set_cv(chip, chip->cv); > + if (ret < 0) > + dev_err(&chip->client->dev, "set CV failed(%d)", ret); > + ret = bq24261_set_inlmt(chip, chip->inlmt); > + if (ret < 0) > + dev_err(&chip->client->dev, "set ILIM failed(%d)", ret); > + ret = bq24261_enable_charger(chip, true); > + if (ret < 0) > + dev_err(&chip->client->dev, > + "enable charger failed(%d)", ret); > + ret = bq24261_enable_charging(chip, true); > + if (ret < 0) > + dev_err(&chip->client->dev, > + "enable charging failed(%d)", ret); > + > + chip->is_charging_enabled = true; > + chip->present = true; > + chip->online = true; > + schedule_delayed_work(&chip->wdt_work, 0); > + } else if (chip->cable.connected && chip->cable.boost) { > + /* Enable VBUS for Host Mode */ > + bq24261_boost_control(chip, true); > + schedule_delayed_work(&chip->wdt_work, 0); > + } else { > + dev_info(&chip->client->dev, "Cable disconnect event\n"); > + cancel_delayed_work_sync(&chip->wdt_work); > + cancel_delayed_work_sync(&chip->fault_mon_work); > + bq24261_boost_control(chip, false); > + ret = bq24261_enable_charging(chip, false); > + if (ret < 0) > + dev_err(&chip->client->dev, > + "charger disable failed(%d)", ret); > + > + chip->is_charging_enabled = false; > + chip->present = false; > + chip->online = false; > + chip->inlmt = 0; > + } > + bq24261_charger_desc.type = chip->cable.chg_type; > + mutex_unlock(&chip->lock); > + power_supply_changed(chip->psy_usb); > +} > + > +static int bq24261_handle_extcon_events(struct notifier_block *nb, > + unsigned long event, void *param) > +{ > + struct bq24261_charger *chip = > + container_of(nb, struct bq24261_charger, cable.nb); > + > + dev_dbg(&chip->client->dev, "external connector event(%ld)\n", event); > + > + schedule_work(&chip->cable.work); > + return NOTIFY_OK; > +} > + > +static int bq24261_extcon_register(struct bq24261_charger *chip) > +{ > + int ret; > + > + INIT_WORK(&chip->cable.work, bq24261_extcon_event_work); > + chip->cable.nb.notifier_call = bq24261_handle_extcon_events; > + > + ret = extcon_register_interest(&chip->cable.sdp, NULL, > + "SLOW-CHARGER", &chip->cable.nb); > + if (ret < 0) { > + dev_warn(&chip->client->dev, > + "extcon SDP registration failed(%d)\n", ret); > + goto sdp_reg_failed; > + } > + > + ret = extcon_register_interest(&chip->cable.cdp, NULL, > + "CHARGE-DOWNSTREAM", &chip->cable.nb); > + if (ret < 0) { > + dev_warn(&chip->client->dev, > + "extcon CDP registration failed(%d)\n", ret); > + goto cdp_reg_failed; > + } > + > + ret = extcon_register_interest(&chip->cable.dcp, NULL, > + "FAST-CHARGER", &chip->cable.nb); > + if (ret < 0) { > + dev_warn(&chip->client->dev, > + "extcon DCP registration failed(%d)\n", ret); > + goto dcp_reg_failed; > + } > + > + ret = extcon_register_interest(&chip->cable.otg, NULL, > + "USB-Host", &chip->cable.nb); > + if (ret < 0) { > + dev_warn(&chip->client->dev, > + "extcon USB-Host registration failed(%d)\n", ret); > + goto otg_reg_failed; > + } > + > + return 0; > + > +otg_reg_failed: > + extcon_unregister_interest(&chip->cable.dcp); > +dcp_reg_failed: > + extcon_unregister_interest(&chip->cable.cdp); > +cdp_reg_failed: > + extcon_unregister_interest(&chip->cable.sdp); > +sdp_reg_failed: > + return -EPROBE_DEFER; > +} > + > +static int bq24261_get_model(struct i2c_client *client, > + enum bq2426x_model *model) > +{ > + int ret; > + > + ret = bq24261_read_reg(client, BQ24261_VENDOR_REV_ADDR); > + if (ret < 0) > + return ret; > + > + if ((ret & BQ24261_VENDOR_MASK) != VENDOR_BQ2426X) > + return -EINVAL; > + > + switch (ret & BQ24261_REV_MASK) { > + case REV_BQ24261: > + *model = BQ24261; > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int bq24261_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); > + struct power_supply_config charger_cfg = {}; > + struct bq24261_charger *chip; > + int ret; > + enum bq2426x_model model; > + > + adapter = to_i2c_adapter(client->dev.parent); > + > + if (!client->dev.platform_data && !id) { > + dev_err(&client->dev, "platform data is null"); > + return -EFAULT; > + } > + > + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { > + dev_err(&client->dev, > + "I2C adapter %s doesn'tsupport BYTE DATA transfer\n", > + adapter->name); > + return -EIO; > + } > + > + ret = bq24261_get_model(client, &model); > + if (ret < 0) { > + dev_err(&client->dev, "chip detection error (%d)\n", ret); > + return -ENODEV; > + } > + > + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); > + if (!chip) > + return -ENOMEM; > + > + chip->client = client; > + if (client->dev.platform_data) > + chip->pdata = client->dev.platform_data; > + else > + chip->pdata = (struct bq24261_platform_data *)id->driver_data; > + i2c_set_clientdata(client, chip); > + mutex_init(&chip->lock); > + chip->model = model; > + > + /* Initialize charger parameters */ > + chip->cc = chip->pdata->def_cc; > + chip->cv = chip->pdata->def_cv; > + chip->iterm = chip->pdata->iterm; > + chip->chg_status = BQ24261_CHRGR_STAT_UNKNOWN; > + chip->chg_health = POWER_SUPPLY_HEALTH_UNKNOWN; > + > + charger_cfg.drv_data = chip; > + charger_cfg.supplied_to = bq24261_charger_supplied_to; > + charger_cfg.num_supplicants = ARRAY_SIZE(bq24261_charger_supplied_to); > + chip->psy_usb = power_supply_register(&client->dev, > + &bq24261_charger_desc, &charger_cfg); > + if (IS_ERR(chip->psy_usb)) { > + dev_err(&client->dev, > + "power supply registration failed(%d)\n", ret); > + return ret; > + } > + > + INIT_DELAYED_WORK(&chip->wdt_work, bq24261_wdt_reset_worker); > + INIT_DELAYED_WORK(&chip->fault_mon_work, bq24261_fault_mon_work); > + > + ret = bq24261_extcon_register(chip); > + if (ret < 0) > + goto extcon_reg_failed; > + > + if (chip->client->irq) { > + ret = request_threaded_irq(chip->client->irq, > + NULL, bq24261_thread_handler, > + IRQF_SHARED | IRQF_NO_SUSPEND, > + DEV_NAME, chip); > + if (ret) { > + dev_err(&client->dev, > + "irq request failed (%d)\n", ret); > + goto irq_reg_failed; > + } > + INIT_WORK(&chip->irq_work, bq24261_irq_worker); > + } > + > + /* Check for charger connecetd boot case */ > + schedule_work(&chip->cable.work); > + > + return 0; > + > +irq_reg_failed: > + extcon_unregister_interest(&chip->cable.sdp); > + extcon_unregister_interest(&chip->cable.cdp); > + extcon_unregister_interest(&chip->cable.dcp); > + extcon_unregister_interest(&chip->cable.otg); > +extcon_reg_failed: > + power_supply_unregister(chip->psy_usb); > + return ret; > +} > + > +static int bq24261_remove(struct i2c_client *client) > +{ > + struct bq24261_charger *chip = i2c_get_clientdata(client); > + > + free_irq(client->irq, chip); > + flush_scheduled_work(); > + extcon_unregister_interest(&chip->cable.sdp); > + extcon_unregister_interest(&chip->cable.cdp); > + extcon_unregister_interest(&chip->cable.dcp); > + extcon_unregister_interest(&chip->cable.otg); > + power_supply_unregister(chip->psy_usb); > + return 0; > +} > + > +static int bq24261_suspend(struct device *dev) > +{ > + struct bq24261_charger *chip = dev_get_drvdata(dev); > + > + dev_dbg(&chip->client->dev, "bq24261 suspend\n"); > + return 0; > +} > + > +static int bq24261_resume(struct device *dev) > +{ > + struct bq24261_charger *chip = dev_get_drvdata(dev); > + > + dev_dbg(&chip->client->dev, "bq24261 resume\n"); > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(bq24261_pm_ops, bq24261_suspend, > + bq24261_resume); > + > +static const struct i2c_device_id bq24261_id[] = { > + {DEV_NAME, 0}, > + { }, > +}; > +MODULE_DEVICE_TABLE(i2c, bq24261_id); > + > +static struct i2c_driver bq24261_driver = { > + .driver = { > + .name = DEV_NAME, > + .pm = &bq24261_pm_ops, > + }, > + .probe = bq24261_probe, > + .remove = bq24261_remove, > + .id_table = bq24261_id, I just noticed this driver doesn't yet support DT which is probably something that should be added. When I start merging my work I will certainly need to do that but I'm curious if there are plans from your end to add this as well (and I had seen Laurentiu's bq24257_charger.c driver uses ACPI for this which seems to be some kind of superset of DT - forgive my simplification I'm not too familiar with ACPI yet). -- Andreas Dannenberg Texas Instruments > +}; > + > +module_i2c_driver(bq24261_driver); > + > +MODULE_AUTHOR("Jenny TC "); > +MODULE_AUTHOR("Ramakrishna Pallala "); > +MODULE_DESCRIPTION("BQ24261 Charger Driver"); > +MODULE_LICENSE("GPL v2"); > diff --git a/include/linux/power/bq24261_charger.h b/include/linux/power/bq24261_charger.h > new file mode 100644 > index 0000000..656db58 > --- /dev/null > +++ b/include/linux/power/bq24261_charger.h > @@ -0,0 +1,26 @@ > +/* > + * bq24261_charger.h: platform data structure for bq24261 driver > + * > + * Copyright (C) 2014 Intel Corporation > + * > + * 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; version 2 > + * of the License. > + */ > + > +#ifndef __BQ24261_CHARGER_H__ > +#define __BQ24261_CHARGER_H__ > + > +struct bq24261_platform_data { > + int def_cc; > + int def_cv; > + int iterm; > + int max_cc; > + int max_cv; > + int min_temp; > + int max_temp; > + bool thermal_sensing; > +}; > + > +#endif > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/