640 lines
17 KiB
C
640 lines
17 KiB
C
/*
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* da9155_charger.c
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* Samsung da9155 Charger Driver
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*
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* Copyright (C) 2015 Samsung Electronics
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "include/charger/da9155_charger.h"
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#define DEBUG
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#define ENABLE 1
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#define DISABLE 0
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static void da9155_set_charge_current(struct da9155_charger_data *charger,
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int charge_current);
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static enum power_supply_property da9155_charger_props[] = {
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};
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static int da9155_read_reg(struct i2c_client *client, u8 reg, u8 *dest)
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{
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struct da9155_charger_data *charger = i2c_get_clientdata(client);
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int ret = 0;
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mutex_lock(&charger->io_lock);
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ret = i2c_smbus_read_byte_data(client, reg);
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mutex_unlock(&charger->io_lock);
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if (ret < 0) {
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pr_err("%s: can't read reg(0x%x), ret(%d)\n", __func__, reg, ret);
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return ret;
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}
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reg &= 0xFF;
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*dest = ret;
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return 0;
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}
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static int da9155_write_reg(struct i2c_client *client, u8 reg, u8 data)
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{
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struct da9155_charger_data *charger = i2c_get_clientdata(client);
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int ret = 0;
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mutex_lock(&charger->io_lock);
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ret = i2c_smbus_write_byte_data(client, reg, data);
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mutex_unlock(&charger->io_lock);
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if (ret < 0)
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pr_err("%s: can't write reg(0x%x), ret(%d)\n", __func__, reg, ret);
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return ret;
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}
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static int da9155_update_reg(struct i2c_client *client, u8 reg, u8 val, u8 mask)
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{
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struct da9155_charger_data *charger = i2c_get_clientdata(client);
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int ret = 0;
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mutex_lock(&charger->io_lock);
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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pr_err("%s: can't update reg(0x%x), ret(%d)\n", __func__, reg, ret);
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else {
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u8 old_val = ret & 0xFF;
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u8 new_val = (val & mask) | (old_val & (~mask));
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ret = i2c_smbus_write_byte_data(client, reg, new_val);
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}
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mutex_unlock(&charger->io_lock);
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return ret;
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}
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static void da9155_charger_test_read(struct da9155_charger_data *charger)
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{
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u8 data = 0;
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u32 addr = 0;
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char str[1024]={0,};
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for (addr = 0x01; addr <= 0x13; addr++) {
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da9155_read_reg(charger->i2c, addr, &data);
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sprintf(str + strlen(str), "[0x%02x]0x%02x, ", addr, data);
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}
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pr_info("DA9155 : %s\n", str);
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}
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static int da9155_get_charger_state(struct da9155_charger_data *charger)
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{
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u8 reg_data;
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da9155_read_reg(charger->i2c, DA9155_STATUS_B, ®_data);
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if (reg_data & DA9155_MODE_MASK)
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return POWER_SUPPLY_STATUS_CHARGING;
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return POWER_SUPPLY_STATUS_NOT_CHARGING;
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}
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static int da9155_get_charger_health(struct da9155_charger_data *charger)
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{
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u8 reg_data;
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// 80s same with maxim IC
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if (da9155_write_reg(charger->i2c, DA9155_TIMER_B, 0x50) < 0)
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{
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dev_info(charger->dev,
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"%s: addr: 0x%x write fail\n", __func__, DA9155_TIMER_B);
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}
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da9155_read_reg(charger->i2c, DA9155_STATUS_A, ®_data);
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if (reg_data & DA9155_S_VIN_UV_MASK) {
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pr_info("%s: VIN undervoltage\n", __func__);
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return POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
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} else if (reg_data & DA9155_S_VIN_DROP_MASK) {
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pr_info("%s: VIN DROP\n", __func__);
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return POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
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} else if (reg_data & DA9155_S_VIN_OV_MASK) {
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pr_info("%s: VIN overvoltage\n", __func__);
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return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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} else
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return POWER_SUPPLY_HEALTH_GOOD;
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}
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static int da9155_get_charge_current(struct da9155_charger_data *charger)
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{
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u8 reg_data;
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int charge_current;
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da9155_read_reg(charger->i2c, DA9155_BUCK_IOUT, ®_data);
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charge_current = reg_data * 10 + 250;
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return charge_current;
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}
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static void da9155_charger_initialize(struct da9155_charger_data *charger)
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{
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pr_info("%s\n", __func__);
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/* clear event reg */
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da9155_update_reg(charger->i2c, DA9155_EVENT_A, 0xFF, 0xFF);
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da9155_update_reg(charger->i2c, DA9155_EVENT_B, 0xFF, 0xFF);
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/* Safety timer enable */
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da9155_update_reg(charger->i2c, DA9155_CONTROL_E, 0, DA9155_TIMER_DIS_MASK);
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/* VBAT_OV: MAX(5V) */
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da9155_update_reg(charger->i2c, DA9155_CONTROL_C, 0x38, DA9155_VBAT_OV_MASK);
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}
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static void da9155_set_charger_state(struct da9155_charger_data *charger,
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int enable)
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{
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u8 status = 0;
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int current_setting = 0;
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pr_info("%s: BUCK_EN(%s)\n", enable > 0 ? "ENABLE" : "DISABLE", __func__);
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if (enable){
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da9155_charger_initialize(charger);
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da9155_read_reg(charger->i2c, DA9155_STATUS_A, &status);
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if (status & 0x7E ){
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pr_info("%s: STATUS_A(0x%X)\n", __func__, status);
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return;
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}
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current_setting = da9155_get_charge_current(charger);
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da9155_set_charge_current(charger, 500);
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da9155_update_reg(charger->i2c, DA9155_BUCK_CONT, DA9155_BUCK_EN_MASK, DA9155_BUCK_EN_MASK);
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msleep(10);
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if (current_setting > 500)
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da9155_set_charge_current(charger, current_setting);
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}
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else {
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current_setting = da9155_get_charge_current(charger);
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if (current_setting > 700) {
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da9155_set_charge_current(charger, 700);
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msleep(100);
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}
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da9155_set_charge_current(charger, 500);
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msleep(100);
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da9155_update_reg(charger->i2c, DA9155_BUCK_CONT, 0, DA9155_BUCK_EN_MASK);
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}
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}
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#if 0
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static void da9155_set_input_current(struct da9155_charger_data *charger,
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int input_current)
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{
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u8 reg_data;
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reg_data = (input_current - 3000) / 100;
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da9155_update_reg(charger->i2c, DA9155_BUCK_ILIM, reg_data, DA9155_BUCK_ILIM_MASK);
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pr_info("%s: input_current(%d)\n", __func__, input_current);
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}
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#endif
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static void da9155_set_charge_current(struct da9155_charger_data *charger,
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int charge_current)
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{
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u8 reg_data;
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if (!charge_current) {
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reg_data = 0x00;
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} else {
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charge_current = (charge_current > 2500) ? 2500 : charge_current;
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reg_data = (charge_current - 250) / 10;
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}
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da9155_update_reg(charger->i2c, DA9155_BUCK_IOUT, reg_data, DA9155_BUCK_IOUT_MASK);
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pr_info("%s: charge_current(%d)\n", __func__, charge_current);
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}
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/* return : 0 (AFC type or High Voltage( > 6V), 1 : 5V ) */
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static int da9155_check_cable_type(unsigned int type)
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{
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if (type == SEC_BATTERY_CABLE_NONE)
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return -1;
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// AFC or High Voltage charger (6V > )
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if (type == SEC_BATTERY_CABLE_9V_TA || \
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type == SEC_BATTERY_CABLE_12V_TA) {
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return 0;
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}
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else {
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return 1;
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}
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return -1;
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}
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static void da9155_set_vindrop_vbatov(struct da9155_charger_data *charger)
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{
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/* VBAT OV Enable */
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x06);
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da9155_write_reg(charger->i2c, 0x39, 0x05);
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da9155_write_reg(charger->i2c, 0x19, 0x0);
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da9155_write_reg(charger->i2c, 0x39, 0x0);
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x0);
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/* set VIN_DROP to 4.5V */
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da9155_write_reg(charger->i2c, DA9155_CONTROL_A, 0x4);
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}
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static void da9155_mode_change(struct da9155_charger_data *charger, u8 enable)
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{
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if(charger->i2c) {
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pr_info("%s: mode(%d), prev_cable_type(%d), cable_type(%d)\n",
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__func__, enable,charger->prev_cable_type, charger->cable_type);
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if (enable == ENABLE) {
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x06);
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da9155_write_reg(charger->i2c, 0x39, 0x05);
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da9155_write_reg(charger->i2c, 0x11, 0x04);
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da9155_write_reg(charger->i2c, 0x39, 0x0);
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x0);
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} else if (enable == DISABLE) {
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if((charger->prev_cable_type == SEC_BATTERY_CABLE_9V_TA ||
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charger->prev_cable_type == SEC_BATTERY_CABLE_12V_TA) &&
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charger->cable_type == SEC_BATTERY_CABLE_NONE)
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return;
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x06);
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da9155_write_reg(charger->i2c, 0x39, 0x05);
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da9155_write_reg(charger->i2c, 0x11, 0x0);
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if(charger->prev_cable_type != SEC_BATTERY_CABLE_9V_TA &&
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charger->prev_cable_type != SEC_BATTERY_CABLE_12V_TA &&
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charger->prev_cable_type != SEC_BATTERY_CABLE_NONE &&
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charger->cable_type == SEC_BATTERY_CABLE_NONE)
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return;
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da9155_write_reg(charger->i2c, 0x39, 0x0);
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da9155_write_reg(charger->i2c, DA9155_PAGE_CTRL_0, 0x0);
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}
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}
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}
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static irqreturn_t da9155_irq_handler(int irq, void *data)
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{
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struct da9155_charger_data *charger = data;
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u8 event_a, event_b;
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dev_info(charger->dev,
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"%s: \n", __func__);
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if (!da9155_read_reg(charger->i2c, DA9155_EVENT_A, &event_a) &&
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!da9155_read_reg(charger->i2c, DA9155_EVENT_B, &event_b)) {
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if ((event_b & 0x1) && (charger->cable_type != SEC_BATTERY_CABLE_NONE)) {
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dev_info(charger->dev, "%s: E_RDY Event occured", __func__);
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da9155_mode_change(charger, da9155_check_cable_type(charger->cable_type));
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da9155_charger_initialize(charger);
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da9155_set_vindrop_vbatov(charger);
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}
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/* clear event reg */
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da9155_write_reg(charger->i2c, DA9155_EVENT_A, event_a);
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da9155_write_reg(charger->i2c, DA9155_EVENT_B, event_b);
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dev_info(charger->dev,
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"%s: EVENT_A(0x%x), EVENT_B(0x%x)\n",
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__func__, event_a, event_b);
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}
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return IRQ_HANDLED;
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}
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static int da9155_chg_get_property(struct power_supply *psy,
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enum power_supply_property psp, union power_supply_propval *val)
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{
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struct da9155_charger_data *charger =
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power_supply_get_drvdata(psy);
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enum power_supply_ext_property ext_psp = psp;
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switch (psp) {
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case POWER_SUPPLY_PROP_HEALTH:
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if (charger->cable_type == SEC_BATTERY_CABLE_9V_TA ||
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charger->cable_type == SEC_BATTERY_CABLE_12V_TA) {
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da9155_charger_test_read(charger);
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val->intval = da9155_get_charger_health(charger);
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} else
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val->intval = POWER_SUPPLY_HEALTH_GOOD;
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = da9155_get_charger_state(charger);
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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val->intval = da9155_get_charge_current(charger);
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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return -ENODATA;
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case POWER_SUPPLY_PROP_MAX ... POWER_SUPPLY_EXT_PROP_MAX:
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switch (ext_psp) {
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case POWER_SUPPLY_EXT_PROP_CHECK_SLAVE_I2C:
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{
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u8 reg_data;
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val->intval = (da9155_read_reg(charger->i2c, DA9155_EVENT_B, ®_data) == 0);
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}
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break;
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case POWER_SUPPLY_EXT_PROP_CHECK_MULTI_CHARGE:
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val->intval = (da9155_get_charger_health(charger) == POWER_SUPPLY_HEALTH_GOOD) ?
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da9155_get_charger_state(charger) : POWER_SUPPLY_STATUS_NOT_CHARGING;
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int da9155_chg_set_property(struct power_supply *psy,
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enum power_supply_property psp, const union power_supply_propval *val)
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{
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struct da9155_charger_data *charger =
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power_supply_get_drvdata(psy);
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switch (psp) {
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case POWER_SUPPLY_PROP_CHARGING_ENABLED:
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charger->is_charging =
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(val->intval == SEC_BAT_CHG_MODE_CHARGING) ? ENABLE : DISABLE;
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da9155_set_charger_state(charger, charger->is_charging);
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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charger->charging_current = val->intval;
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da9155_set_charge_current(charger, charger->charging_current);
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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charger->siop_level = val->intval;
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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charger->cable_type = val->intval;
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if (val->intval != SEC_BATTERY_CABLE_NONE) {
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da9155_mode_change(charger, da9155_check_cable_type(charger->cable_type));
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charger->prev_cable_type = charger->cable_type;
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da9155_charger_initialize(charger);
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da9155_set_vindrop_vbatov(charger);
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} else {
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da9155_mode_change(charger, DISABLE);
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charger->prev_cable_type = SEC_BATTERY_CABLE_NONE;
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}
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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case POWER_SUPPLY_PROP_STATUS:
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case POWER_SUPPLY_PROP_CURRENT_FULL:
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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case POWER_SUPPLY_PROP_HEALTH:
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return -ENODATA;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int da9155_charger_parse_dt(struct da9155_charger_data *charger,
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struct da9155_charger_platform_data *pdata)
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{
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struct device_node *np = of_find_node_by_name(NULL, "da9155-charger");
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int ret = 0;
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if (!np) {
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pr_err("%s: np is NULL\n", __func__);
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return -1;
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} else {
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ret = of_get_named_gpio_flags(np, "da9155-charger,irq-gpio",
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0, NULL);
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if (ret < 0) {
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pr_err("%s: da9155-charger,irq-gpio is empty\n", __func__);
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pdata->irq_gpio = 0;
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} else {
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pdata->irq_gpio = ret;
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pr_info("%s: irq-gpio = %d\n", __func__, pdata->irq_gpio);
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}
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}
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np = of_find_node_by_name(NULL, "battery");
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if (!np) {
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pr_err("%s np NULL\n", __func__);
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} else {
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ret = of_property_read_u32(np, "battery,chg_float_voltage",
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&charger->float_voltage);
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if (ret) {
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pr_info("%s: battery,chg_float_voltage is Empty\n", __func__);
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charger->float_voltage = 42000;
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}
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}
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return ret;
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}
|
|
|
|
static const struct power_supply_desc da9155_charger_power_supply_desc = {
|
|
.name = "da9155-charger",
|
|
.type = POWER_SUPPLY_TYPE_UNKNOWN,
|
|
.properties = da9155_charger_props,
|
|
.num_properties = ARRAY_SIZE(da9155_charger_props),
|
|
.get_property = da9155_chg_get_property,
|
|
.set_property = da9155_chg_set_property,
|
|
};
|
|
|
|
static int da9155_charger_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device_node *of_node = client->dev.of_node;
|
|
struct da9155_charger_data *charger;
|
|
struct da9155_charger_platform_data *pdata = client->dev.platform_data;
|
|
struct power_supply_config sub_charger_cfg = {};
|
|
int ret = 0;
|
|
|
|
pr_info("%s: DA9155 Charger Driver Loading\n", __func__);
|
|
|
|
charger = kzalloc(sizeof(*charger), GFP_KERNEL);
|
|
if (!charger) {
|
|
pr_err("%s: Failed to allocate memory\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_init(&charger->io_lock);
|
|
charger->dev = &client->dev;
|
|
charger->i2c = client;
|
|
if (of_node) {
|
|
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
pr_err("%s: Failed to allocate memory\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto err_nomem;
|
|
}
|
|
ret = da9155_charger_parse_dt(charger, pdata);
|
|
if (ret < 0)
|
|
goto err_parse_dt;
|
|
}
|
|
charger->pdata = pdata;
|
|
i2c_set_clientdata(client, charger);
|
|
|
|
/* da9155_charger_initialize(charger); */
|
|
charger->cable_type = SEC_BATTERY_CABLE_NONE;
|
|
charger->prev_cable_type = SEC_BATTERY_CABLE_NONE;
|
|
sub_charger_cfg.drv_data = charger;
|
|
charger->psy_chg = power_supply_register(charger->dev, &da9155_charger_power_supply_desc, &sub_charger_cfg);
|
|
if (ret) {
|
|
pr_err("%s: Failed to Register psy_chg\n", __func__);
|
|
ret = -1;
|
|
goto err_power_supply_register;
|
|
}
|
|
|
|
if (pdata->irq_gpio) {
|
|
charger->chg_irq = gpio_to_irq(pdata->irq_gpio);
|
|
|
|
ret = request_threaded_irq(charger->chg_irq, NULL,
|
|
da9155_irq_handler,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
"da9155-irq", charger);
|
|
if (ret < 0) {
|
|
pr_err("%s: Failed to Request IRQ(%d)\n", __func__, ret);
|
|
goto err_req_irq;
|
|
}
|
|
}
|
|
device_init_wakeup(charger->dev, 1);
|
|
|
|
pr_info("%s: DA9155 Charger Driver Loaded\n", __func__);
|
|
|
|
return 0;
|
|
|
|
err_req_irq:
|
|
power_supply_unregister(charger->psy_chg);
|
|
err_power_supply_register:
|
|
err_parse_dt:
|
|
kfree(pdata);
|
|
err_nomem:
|
|
mutex_destroy(&charger->io_lock);
|
|
kfree(charger);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int da9155_charger_remove(struct i2c_client *client)
|
|
{
|
|
struct da9155_charger_data *charger = i2c_get_clientdata(client);
|
|
|
|
if (charger->chg_irq)
|
|
free_irq(charger->chg_irq, charger);
|
|
power_supply_unregister(charger->psy_chg);
|
|
mutex_destroy(&charger->io_lock);
|
|
kfree(charger->pdata);
|
|
kfree(charger);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void da9155_charger_shutdown(struct i2c_client *client)
|
|
{
|
|
struct da9155_charger_data *charger = i2c_get_clientdata(client);
|
|
|
|
if (charger->chg_irq)
|
|
free_irq(charger->chg_irq, charger);
|
|
da9155_update_reg(client, DA9155_BUCK_CONT, 0, DA9155_BUCK_EN_MASK);
|
|
da9155_update_reg(client, DA9155_BUCK_IOUT, 0x7D, DA9155_BUCK_ILIM_MASK);
|
|
if (charger->cable_type != SEC_BATTERY_CABLE_NONE)
|
|
da9155_mode_change(charger, DISABLE);
|
|
}
|
|
|
|
static const struct i2c_device_id da9155_charger_id_table[] = {
|
|
{"da9155-charger", 0},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, da9155_id_table);
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id da9155_charger_match_table[] = {
|
|
{.compatible = "dlg,da9155-charger"},
|
|
{},
|
|
};
|
|
#else
|
|
#define da9155_charger_match_table NULL
|
|
#endif
|
|
|
|
#if defined(CONFIG_PM)
|
|
static int da9155_charger_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
|
|
struct da9155_charger_data *charger = i2c_get_clientdata(i2c);
|
|
|
|
if (charger->chg_irq) {
|
|
if (device_may_wakeup(dev))
|
|
enable_irq_wake(charger->chg_irq);
|
|
disable_irq(charger->chg_irq);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int da9155_charger_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
|
|
struct da9155_charger_data *charger = i2c_get_clientdata(i2c);
|
|
|
|
if (charger->chg_irq) {
|
|
if (device_may_wakeup(dev))
|
|
disable_irq_wake(charger->chg_irq);
|
|
enable_irq(charger->chg_irq);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define da9155_charger_suspend NULL
|
|
#define da9155_charger_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
const struct dev_pm_ops da9155_pm = {
|
|
.suspend = da9155_charger_suspend,
|
|
.resume = da9155_charger_resume,
|
|
};
|
|
|
|
static struct i2c_driver da9155_charger_driver = {
|
|
.driver = {
|
|
.name = "da9155-charger",
|
|
.owner = THIS_MODULE,
|
|
#if defined(CONFIG_PM)
|
|
.pm = &da9155_pm,
|
|
#endif /* CONFIG_PM */
|
|
.of_match_table = da9155_charger_match_table,
|
|
},
|
|
.probe = da9155_charger_probe,
|
|
.remove = da9155_charger_remove,
|
|
.shutdown = da9155_charger_shutdown,
|
|
.id_table = da9155_charger_id_table,
|
|
};
|
|
|
|
static int __init da9155_charger_init(void)
|
|
{
|
|
pr_info("%s: \n", __func__);
|
|
return i2c_add_driver(&da9155_charger_driver);
|
|
}
|
|
|
|
static void __exit da9155_charger_exit(void)
|
|
{
|
|
pr_info("%s: \n", __func__);
|
|
i2c_del_driver(&da9155_charger_driver);
|
|
}
|
|
|
|
module_init(da9155_charger_init);
|
|
module_exit(da9155_charger_exit);
|
|
|
|
MODULE_DESCRIPTION("Samsung DA9155 Charger Driver");
|
|
MODULE_AUTHOR("Samsung Electronics");
|
|
MODULE_LICENSE("GPL");
|