1ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha/* 2ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * Battery charger driver for TI BQ24735 3ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * 4ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. 5ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * 6ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * This program is free software; you can redistribute it and/or modify 7ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * it under the terms of the GNU General Public License as published by 8ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * the Free Software Foundation; 9ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * 10ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * This program is distributed in the hope that it will be useful, but WITHOUT 11ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * more details. 14ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * 15ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * You should have received a copy of the GNU General Public License along 16ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * with this program; if not, write to the Free Software Foundation, Inc., 17ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 18ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha */ 19ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 20ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/err.h> 21ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/gpio.h> 22ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/i2c.h> 23ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/init.h> 24ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/interrupt.h> 25ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/kernel.h> 26ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/module.h> 27ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/of.h> 28ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/of_gpio.h> 29ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/power_supply.h> 30ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/slab.h> 31ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 32ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#include <linux/power/bq24735-charger.h> 33ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 34ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHG_OPT 0x12 35ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHG_OPT_CHARGE_DISABLE (1 << 0) 36ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHG_OPT_AC_PRESENT (1 << 4) 37ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHARGE_CURRENT 0x14 38ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHARGE_CURRENT_MASK 0x1fc0 39ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHARGE_VOLTAGE 0x15 40ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_CHARGE_VOLTAGE_MASK 0x7ff0 41ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_INPUT_CURRENT 0x3f 42ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_INPUT_CURRENT_MASK 0x1f80 43ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_MANUFACTURER_ID 0xfe 44ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha#define BQ24735_DEVICE_ID 0xff 45ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 46ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastruct bq24735 { 47ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct power_supply charger; 48ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct i2c_client *client; 49ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735_platform *pdata; 50ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha}; 51ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 52ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic inline struct bq24735 *to_bq24735(struct power_supply *psy) 53ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 54ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return container_of(psy, struct bq24735, charger); 55ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 56ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 57ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic enum power_supply_property bq24735_charger_properties[] = { 58ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha POWER_SUPPLY_PROP_ONLINE, 59ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha}; 60ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 61ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic inline int bq24735_write_word(struct i2c_client *client, u8 reg, 62ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha u16 value) 63ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 64ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return i2c_smbus_write_word_data(client, reg, le16_to_cpu(value)); 65ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 66ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 67ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic inline int bq24735_read_word(struct i2c_client *client, u8 reg) 68ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 69ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha s32 ret = i2c_smbus_read_word_data(client, reg); 70ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 71ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret < 0 ? ret : le16_to_cpu(ret); 72ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 73ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 74ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic int bq24735_update_word(struct i2c_client *client, u8 reg, 75ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha u16 mask, u16 value) 76ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 77ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha unsigned int tmp; 78ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ret; 79ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 80ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_read_word(client, reg); 81ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) 82ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret; 83ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 84ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha tmp = ret & ~mask; 85ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha tmp |= value & mask; 86ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 87ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return bq24735_write_word(client, reg, tmp); 88ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 89ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 90ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic inline int bq24735_enable_charging(struct bq24735 *charger) 91ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 92ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return bq24735_update_word(charger->client, BQ24735_CHG_OPT, 93ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_CHG_OPT_CHARGE_DISABLE, 94ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ~BQ24735_CHG_OPT_CHARGE_DISABLE); 95ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 96ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 97ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic inline int bq24735_disable_charging(struct bq24735 *charger) 98ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 99ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return bq24735_update_word(charger->client, BQ24735_CHG_OPT, 100ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_CHG_OPT_CHARGE_DISABLE, 101ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_CHG_OPT_CHARGE_DISABLE); 102ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 103ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 104ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic int bq24735_config_charger(struct bq24735 *charger) 105ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 106ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735_platform *pdata = charger->pdata; 107ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ret; 108ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha u16 value; 109ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 110ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (pdata->charge_current) { 111ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha value = pdata->charge_current & BQ24735_CHARGE_CURRENT_MASK; 112ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 113ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_write_word(charger->client, 114ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_CHARGE_CURRENT, value); 115ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 116ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&charger->client->dev, 117ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Failed to write charger current : %d\n", 118ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret); 119ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret; 120ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 121ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 122ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 123ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (pdata->charge_voltage) { 124ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha value = pdata->charge_voltage & BQ24735_CHARGE_VOLTAGE_MASK; 125ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 126ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_write_word(charger->client, 127ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_CHARGE_VOLTAGE, value); 128ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 129ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&charger->client->dev, 130ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Failed to write charger voltage : %d\n", 131ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret); 132ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret; 133ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 134ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 135ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 136ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (pdata->input_current) { 137ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha value = pdata->input_current & BQ24735_INPUT_CURRENT_MASK; 138ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 139ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_write_word(charger->client, 140ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha BQ24735_INPUT_CURRENT, value); 141ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 142ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&charger->client->dev, 143ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Failed to write input current : %d\n", 144ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret); 145ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret; 146ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 147ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 148ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 149ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return 0; 150ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 151ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 152ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic bool bq24735_charger_is_present(struct bq24735 *charger) 153ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 154ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735_platform *pdata = charger->pdata; 155ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ret; 156ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 157ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (pdata->status_gpio_valid) { 158ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = gpio_get_value_cansleep(pdata->status_gpio); 159ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret ^= pdata->status_gpio_active_low == 0; 160ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } else { 161ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ac = 0; 162ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 163ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ac = bq24735_read_word(charger->client, BQ24735_CHG_OPT); 164ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ac < 0) { 165ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&charger->client->dev, 166ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Failed to read charger options : %d\n", 167ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ac); 168ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return false; 169ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 170ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return (ac & BQ24735_CHG_OPT_AC_PRESENT) ? true : false; 171ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 172ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 173ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return false; 174ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 175ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 176ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic irqreturn_t bq24735_charger_isr(int irq, void *devid) 177ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 178ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct power_supply *psy = devid; 179ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735 *charger = to_bq24735(psy); 180ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 181ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (bq24735_charger_is_present(charger)) 182ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha bq24735_enable_charging(charger); 183ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha else 184ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha bq24735_disable_charging(charger); 185ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 186ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha power_supply_changed(psy); 187ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 188ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return IRQ_HANDLED; 189ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 190ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 191ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic int bq24735_charger_get_property(struct power_supply *psy, 192ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha enum power_supply_property psp, 193ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha union power_supply_propval *val) 194ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 195ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735 *charger; 196ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 197ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger = container_of(psy, struct bq24735, charger); 198ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 199ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha switch (psp) { 200ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha case POWER_SUPPLY_PROP_ONLINE: 201ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha val->intval = bq24735_charger_is_present(charger) ? 1 : 0; 202ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha break; 203ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha default: 204ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return -EINVAL; 205ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 206ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 207ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return 0; 208ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 209ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 210ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client) 211ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 212ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735_platform *pdata; 213ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct device_node *np = client->dev.of_node; 214ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha u32 val; 215ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ret; 216ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha enum of_gpio_flags flags; 217ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 218ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); 219ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!pdata) { 220ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, 221ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Memory alloc for bq24735 pdata failed\n"); 222ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return NULL; 223ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 224ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 225ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata->status_gpio = of_get_named_gpio_flags(np, "ti,ac-detect-gpios", 226ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 0, &flags); 227ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 228ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (flags & OF_GPIO_ACTIVE_LOW) 229ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata->status_gpio_active_low = 1; 230ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 231ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = of_property_read_u32(np, "ti,charge-current", &val); 232ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!ret) 233ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata->charge_current = val; 234ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 235ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = of_property_read_u32(np, "ti,charge-voltage", &val); 236ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!ret) 237ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata->charge_voltage = val; 238ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 239ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = of_property_read_u32(np, "ti,input-current", &val); 240ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!ret) 241ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha pdata->input_current = val; 242ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 243ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return pdata; 244ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 245ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 246ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic int bq24735_charger_probe(struct i2c_client *client, 247ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha const struct i2c_device_id *id) 248ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 249ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha int ret; 250ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735 *charger; 251ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct power_supply *supply; 252ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha char *name; 253ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 254ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger = devm_kzalloc(&client->dev, sizeof(*charger), GFP_KERNEL); 255ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!charger) 256ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return -ENOMEM; 257ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 258ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->pdata = client->dev.platform_data; 259ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 260ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (IS_ENABLED(CONFIG_OF) && !charger->pdata && client->dev.of_node) 261ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->pdata = bq24735_parse_dt_data(client); 262ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 263ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!charger->pdata) { 264ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "no platform data provided\n"); 265ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return -EINVAL; 266ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 267ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 268ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha name = (char *)charger->pdata->name; 269ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!name) { 270ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha name = kasprintf(GFP_KERNEL, "bq24735@%s", 271ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_name(&client->dev)); 272ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (!name) { 273ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "Failed to alloc device name\n"); 274ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return -ENOMEM; 275ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 276ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 277ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 278ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->client = client; 279ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 280ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply = &charger->charger; 281ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 282ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->name = name; 283ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->type = POWER_SUPPLY_TYPE_MAINS; 284ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->properties = bq24735_charger_properties; 285ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->num_properties = ARRAY_SIZE(bq24735_charger_properties); 286ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->get_property = bq24735_charger_get_property; 287ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->supplied_to = charger->pdata->supplied_to; 288ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->num_supplicants = charger->pdata->num_supplicants; 289ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->of_node = client->dev.of_node; 290ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 291ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha i2c_set_clientdata(client, charger); 292ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 293ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_read_word(client, BQ24735_MANUFACTURER_ID); 294ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 295ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "Failed to read manufacturer id : %d\n", 296ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret); 297ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 298ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } else if (ret != 0x0040) { 299ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, 300ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "manufacturer id mismatch. 0x0040 != 0x%04x\n", ret); 301ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = -ENODEV; 302ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 303ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 304ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 305ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_read_word(client, BQ24735_DEVICE_ID); 306ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 307ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "Failed to read device id : %d\n", ret); 308ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 309ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } else if (ret != 0x000B) { 310ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, 311ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "device id mismatch. 0x000b != 0x%04x\n", ret); 312ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = -ENODEV; 313ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 314ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 315ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 316ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (gpio_is_valid(charger->pdata->status_gpio)) { 317ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = devm_gpio_request(&client->dev, 318ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->pdata->status_gpio, 319ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha name); 320ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret) { 321ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, 322ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Failed GPIO request for GPIO %d: %d\n", 323ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->pdata->status_gpio, ret); 324ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 325ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 326ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha charger->pdata->status_gpio_valid = !ret; 327ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 328ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 329ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_config_charger(charger); 330ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 331ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "failed in configuring charger"); 332ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 333ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 334ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 335ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha /* check for AC adapter presence */ 336ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (bq24735_charger_is_present(charger)) { 337ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = bq24735_enable_charging(charger); 338ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 339ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "Failed to enable charging\n"); 340ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 341ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 342ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 343ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 344ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = power_supply_register(&client->dev, supply); 345ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret < 0) { 346ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, "Failed to register power supply: %d\n", 347ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret); 348ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_free_name; 349ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 350ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 351ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (client->irq) { 352ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha ret = devm_request_threaded_irq(&client->dev, client->irq, 353ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha NULL, bq24735_charger_isr, 354ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha IRQF_TRIGGER_RISING | 355ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha IRQF_TRIGGER_FALLING | 356ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha IRQF_ONESHOT, 357ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha supply->name, supply); 358ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (ret) { 359ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha dev_err(&client->dev, 360ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha "Unable to register IRQ %d err %d\n", 361ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha client->irq, ret); 362ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha goto err_unregister_supply; 363ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 364ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha } 365ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 366ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return 0; 367ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshaerr_unregister_supply: 368ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha power_supply_unregister(supply); 369ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshaerr_free_name: 370ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (name != charger->pdata->name) 371ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha kfree(name); 372ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 373ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return ret; 374ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 375ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 376ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic int bq24735_charger_remove(struct i2c_client *client) 377ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha{ 378ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha struct bq24735 *charger = i2c_get_clientdata(client); 379ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 380ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (charger->client->irq) 381ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha devm_free_irq(&charger->client->dev, charger->client->irq, 382ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha &charger->charger); 383ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 384ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha power_supply_unregister(&charger->charger); 385ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 386ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha if (charger->charger.name != charger->pdata->name) 387ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha kfree(charger->charger.name); 388ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 389ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha return 0; 390ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha} 391ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 392ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic const struct i2c_device_id bq24735_charger_id[] = { 393ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha { "bq24735-charger", 0 }, 394ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha {} 395ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha}; 396ce77399226313a72578b5b0d67e289d3f165b8baDarbha SriharshaMODULE_DEVICE_TABLE(i2c, bq24735_charger_id); 397ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 398ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic const struct of_device_id bq24735_match_ids[] = { 399ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha { .compatible = "ti,bq24735", }, 400ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha { /* end */ } 401ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha}; 402ce77399226313a72578b5b0d67e289d3f165b8baDarbha SriharshaMODULE_DEVICE_TABLE(of, bq24735_match_ids); 403ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 404ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshastatic struct i2c_driver bq24735_charger_driver = { 405ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .driver = { 406ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .name = "bq24735-charger", 407ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .owner = THIS_MODULE, 408ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .of_match_table = bq24735_match_ids, 409ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha }, 410ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .probe = bq24735_charger_probe, 411ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .remove = bq24735_charger_remove, 412ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha .id_table = bq24735_charger_id, 413ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha}; 414ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 415ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharshamodule_i2c_driver(bq24735_charger_driver); 416ce77399226313a72578b5b0d67e289d3f165b8baDarbha Sriharsha 417ce77399226313a72578b5b0d67e289d3f165b8baDarbha SriharshaMODULE_DESCRIPTION("bq24735 battery charging driver"); 418ce77399226313a72578b5b0d67e289d3f165b8baDarbha SriharshaMODULE_AUTHOR("Darbha Sriharsha <dsriharsha@nvidia.com>"); 419ce77399226313a72578b5b0d67e289d3f165b8baDarbha SriharshaMODULE_LICENSE("GPL v2"); 420