// SPDX-License-Identifier: GPL-2.0
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/*
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* Chrager driver for cw221x
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*
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* Copyright (c) 2022 Rockchip Electronics Co., Ltd.
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*
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* Author: Xu Shengfei <xsf@rock-chips.com>
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/sizes.h>
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#include <linux/time.h>
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#include <linux/workqueue.h>
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/* Module parameters. */
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static int debug;
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module_param_named(debug, debug, int, 0644);
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MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
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#define cw_printk(fmt, arg...) \
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{ \
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if (debug) \
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pr_info("FG_CW221X: %s-%d:" fmt, __func__, __LINE__, ##arg); \
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}
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#define CW_PROPERTIES "cw221X-bat"
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#define REG_CHIP_ID 0x00
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#define REG_VCELL_H 0x02
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#define REG_VCELL_L 0x03
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#define REG_SOC_INT 0x04
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#define REG_SOC_DECIMAL 0x05
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#define REG_TEMP 0x06
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#define REG_MODE_CONFIG 0x08
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#define REG_GPIO_CONFIG 0x0A
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#define REG_SOC_ALERT 0x0B
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#define REG_TEMP_MAX 0x0C
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#define REG_TEMP_MIN 0x0D
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#define REG_CURRENT_H 0x0E
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#define REG_CURRENT_L 0x0F
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#define REG_T_HOST_H 0xA0
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#define REG_T_HOST_L 0xA1
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#define REG_USER_CONF 0xA2
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#define REG_CYCLE_H 0xA4
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#define REG_CYCLE_L 0xA5
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#define REG_SOH 0xA6
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#define REG_IC_STATE 0xA7
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#define REG_FW_VERSION 0xAB
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#define REG_BAT_PROFILE 0x10
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#define CONFIG_MODE_RESTART 0x30
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#define CONFIG_MODE_ACTIVE 0x00
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#define CONFIG_MODE_SLEEP 0xF0
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#define CONFIG_UPDATE_FLG 0x80
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#define IC_VCHIP_ID 0xA0
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#define IC_READY_MARK 0x0C
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#define GPIO_ENABLE_MIN_TEMP 0
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#define GPIO_ENABLE_MAX_TEMP 0
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#define GPIO_ENABLE_SOC_CHANGE 0
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#define GPIO_SOC_IRQ_VALUE 0x0 /* 0x7F */
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#define DEFINED_MAX_TEMP 45
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#define DEFINED_MIN_TEMP 0
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#define CWFG_NAME "cw221X"
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#define SIZE_OF_PROFILE 80
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/* mhom rsense * 1000 for convenience calculation */
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#define USER_RSENSE 1500
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#define queue_delayed_work_time 5000
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#define queue_start_work_time 50
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#define CW_SLEEP_20MS 20
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#define CW_SLEEP_10MS 10
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#define CW_UI_FULL 100
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#define COMPLEMENT_CODE_U16 0x8000
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#define CW_SLEEP_100MS 100
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#define CW_SLEEP_200MS 200
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#define CW_SLEEP_COUNTS 50
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#define CW_TRUE 1
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#define CW_RETRY_COUNT 3
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#define CW_VOL_UNIT 1000
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#define CW_LOW_VOLTAGE_REF 2500
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#define CW_LOW_VOLTAGE 3000
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#define CW_LOW_VOLTAGE_STEP 10
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#define CW221X_NOT_ACTIVE 1
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#define CW221X_PROFILE_NOT_READY 2
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#define CW221X_PROFILE_NEED_UPDATE 3
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#define CW2215_MARK 0x80
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#define CW2217_MARK 0x40
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#define CW2218_MARK 0x00
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static unsigned char config_profile_info[SIZE_OF_PROFILE] = {
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0x5A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xA0, 0xB2,
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0xC2, 0xCA, 0xC2, 0xBD, 0x9C, 0x5C, 0x38, 0xFF, 0xFF, 0xC4,
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0x86, 0x74, 0x60, 0x55, 0x4F, 0x4D, 0x4B, 0x80, 0xC0, 0xDB,
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0xCD, 0xD0, 0xCE, 0xD2, 0xD3, 0xD2, 0xD0, 0xCE, 0xC3, 0xD5,
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0xB9, 0xC9, 0xC5, 0xA3, 0x92, 0x8A, 0x80, 0x72, 0x63, 0x62,
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0x74, 0x90, 0xA6, 0x7E, 0x5F, 0x48, 0x80, 0x00, 0xAB, 0x10,
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0x00, 0xA1, 0xFB, 0x00, 0x00, 0x00, 0x64, 0x1E, 0xB1, 0x04,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4D,
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};
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struct cw_battery {
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struct i2c_client *client;
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struct device *dev;
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struct workqueue_struct *cwfg_workqueue;
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struct delayed_work battery_delay_work;
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struct power_supply *cw_bat;
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u8 *bat_profile;
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int chip_id;
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int voltage;
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int ic_soc_h;
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int ic_soc_l;
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int ui_soc;
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int temp;
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long cw_current;
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int cycle;
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int soh;
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int fw_version;
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};
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/* CW221X iic read function */
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static int cw_read(struct i2c_client *client,
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unsigned char reg,
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unsigned char buf[])
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{
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int ret;
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ret = i2c_smbus_read_i2c_block_data(client, reg, 1, buf);
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if (ret < 0)
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dev_err(&client->dev, "IIC error %d\n", ret);
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return ret;
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}
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/* CW221X iic write function */
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static int cw_write(struct i2c_client *client,
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unsigned char reg,
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unsigned char const buf[])
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{
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int ret;
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ret = i2c_smbus_write_i2c_block_data(client, reg, 1, &buf[0]);
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if (ret < 0)
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dev_err(&client->dev, "IIC error %d\n", ret);
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return ret;
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}
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/* CW221X iic read word function */
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static int cw_read_word(struct i2c_client *client,
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unsigned char reg,
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unsigned char buf[])
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{
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unsigned char reg_val[2] = {0, 0};
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unsigned int temp_val_buff;
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unsigned int temp_val_second;
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int ret;
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ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val);
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if (ret < 0)
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dev_err(&client->dev, "IIC error %d\n", ret);
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temp_val_buff = (reg_val[0] << 8) + reg_val[1];
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msleep(CW_SLEEP_10MS);
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ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val);
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if (ret < 0)
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dev_err(&client->dev, "IIC error %d\n", ret);
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temp_val_second = (reg_val[0] << 8) + reg_val[1];
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if (temp_val_buff != temp_val_second) {
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msleep(CW_SLEEP_10MS);
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ret = i2c_smbus_read_i2c_block_data(client, reg, 2, reg_val);
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if (ret < 0) {
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dev_err(&client->dev, "IIC error %d\n", ret);
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return ret;
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}
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}
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buf[0] = reg_val[0];
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buf[1] = reg_val[1];
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return ret;
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}
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/* CW221X iic write profile function */
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static int cw_write_profile(struct i2c_client *client, unsigned char const buf[])
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{
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int ret;
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int i;
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for (i = 0; i < SIZE_OF_PROFILE; i++) {
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ret = cw_write(client, REG_BAT_PROFILE + i, &buf[i]);
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if (ret < 0) {
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dev_err(&client->dev, "IIC error %d\n", ret);
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return ret;
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}
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}
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return ret;
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}
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/*
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* CW221X Active function
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* The CONFIG register is used for the host MCU to configure the fuel gauge IC.
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* The default value is 0xF0, SLEEP and RESTART bits are set. To power up the IC,
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* the host MCU needs to write 0x30 to exit shutdown mode, and then write 0x00 to
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* restart the gauge to enter active mode. To reset the IC, the host MCU needs
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* to write 0xF0, 0x30 and 0x00 in sequence to this register to complete the
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* restart procedure. The CW221X will reload relevant parameters and settings and
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* restart SOC calculation. Note that the SOC may be a different value after reset
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* operation since it is a brand-new calculation based on the latest battery status.
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* CONFIG [3:0] is reserved. Don't do any operation with it.
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*/
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static int cw221X_active(struct cw_battery *cw_bat)
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{
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unsigned char reg_val = CONFIG_MODE_RESTART;
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int ret;
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ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val);
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if (ret < 0)
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return ret;
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msleep(CW_SLEEP_20MS); /* Here delay must >= 20 ms */
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reg_val = CONFIG_MODE_ACTIVE;
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ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val);
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if (ret < 0)
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return ret;
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msleep(CW_SLEEP_10MS);
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return 0;
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}
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/*
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* CW221X Sleep function
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* The CONFIG register is used for the host MCU to configure the fuel gauge IC.
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* The default value is 0xF0,SLEEP and RESTART bits are set. To power up the IC,
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* the host MCU needs to write 0x30 to exit shutdown mode, and then write 0x00
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* to restart the gauge to enter active mode. To reset the IC, the host MCU needs
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* to write 0xF0, 0x30 and 0x00 in sequence to this register to complete the restart
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* procedure. The CW221X will reload relevant parameters and settings and restart SOC
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* calculation. Note that the SOC may be a different value after reset operation since
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* it is a brand-new calculation based on the latest battery status.
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* CONFIG [3:0] is reserved. Don't do any operation with it.
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*/
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static int cw221X_sleep(struct cw_battery *cw_bat)
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{
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unsigned char reg_val = CONFIG_MODE_RESTART;
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int ret;
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ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val);
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if (ret < 0)
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return ret;
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msleep(CW_SLEEP_20MS); /* Here delay must >= 20 ms */
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reg_val = CONFIG_MODE_SLEEP;
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ret = cw_write(cw_bat->client, REG_MODE_CONFIG, ®_val);
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if (ret < 0)
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return ret;
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msleep(CW_SLEEP_10MS);
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return 0;
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}
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/*
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* The 0x00 register is an UNSIGNED 8bit read-only register. Its value is
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* fixed to 0xA0 in shutdown mode and active mode.
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*/
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static int cw_get_chip_id(struct cw_battery *cw_bat)
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{
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unsigned char reg_val;
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int chip_id;
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int ret;
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ret = cw_read(cw_bat->client, REG_CHIP_ID, ®_val);
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if (ret < 0)
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return ret;
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chip_id = reg_val; /* This value must be 0xA0! */
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pr_info("CW: chip_id = 0x%x\n", chip_id);
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cw_bat->chip_id = chip_id;
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return 0;
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}
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/*
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* The VCELL register(0x02 0x03) is an UNSIGNED 14bit read-only register that
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* updates the battery voltage continuously. Battery voltage is measured between
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* the VCELL pin and VSS pin, which is the ground reference. A 14bit
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* sigma-delta A/D converter is used and the voltage resolution is 312.5uV. (0.3125mV is *5/16)
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*/
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static int cw_get_voltage(struct cw_battery *cw_bat)
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{
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unsigned char reg_val[2] = {0, 0};
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unsigned int voltage;
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int ret;
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ret = cw_read_word(cw_bat->client, REG_VCELL_H, reg_val);
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if (ret < 0)
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return ret;
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voltage = (reg_val[0] << 8) + reg_val[1];
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voltage = voltage * 5 / 16;
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cw_bat->voltage = voltage;
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return 0;
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}
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/*
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* The SOC register(0x04 0x05) is an UNSIGNED 16bit read-only register that indicates
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* the SOC of the battery. The SOC shows in % format, which means how much percent of
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* the battery's total available capacity is remaining in the battery now. The SOC can
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* intrinsically adjust itself to cater to the change of battery status,
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* including load, temperature and aging etc.
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* The high byte(0x04) contains the SOC in 1% unit which can be directly used if
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* this resolution is good enough for the application. The low byte(0x05) provides
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* more accurate fractional part of the SOC and its
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* LSB is (1/256) %.
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*/
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static int cw_get_capacity(struct cw_battery *cw_bat)
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{
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unsigned char reg_val[2] = {0, 0};
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int ui_100 = CW_UI_FULL;
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int ui_soc;
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int soc_h;
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int soc_l;
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int ret;
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ret = cw_read_word(cw_bat->client, REG_SOC_INT, reg_val);
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if (ret < 0)
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return ret;
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soc_h = reg_val[0];
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soc_l = reg_val[1];
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ui_soc = ((soc_h * 256 + soc_l) * 100) / (ui_100 * 256);
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/* remainder = (((soc_h * 256 + soc_l) * 100 * 100) / (ui_100 * 256)) % 100; */
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if (ui_soc >= 100) {
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cw_printk("CW221x[%d]: UI_SOC = %d larger 100!\n", __LINE__, ui_soc);
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ui_soc = 100;
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}
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cw_bat->ic_soc_h = soc_h;
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cw_bat->ic_soc_l = soc_l;
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cw_bat->ui_soc = ui_soc;
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return 0;
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}
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/*
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* The TEMP register is an UNSIGNED 8bit read only register.
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* It reports the real-time battery temperature
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* measured at TS pin. The scope is from -40 to 87.5 degrees Celsius,
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* LSB is 0.5 degree Celsius. TEMP(C) = - 40 + Value(0x06 Reg) / 2
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*/
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static int cw_get_temp(struct cw_battery *cw_bat)
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{
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unsigned char reg_val;
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int temp;
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int ret;
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ret = cw_read(cw_bat->client, REG_TEMP, ®_val);
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if (ret < 0)
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return ret;
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temp = (int)reg_val * 10 / 2 - 400;
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cw_bat->temp = temp;
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return 0;
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}
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/* get complement code function, unsigned short must be U16 */
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static long get_complement_code(unsigned short raw_code)
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{
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long complement_code;
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int dir;
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if (0 != (raw_code & COMPLEMENT_CODE_U16)) {
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dir = -1;
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raw_code = (0xFFFF - raw_code) + 1;
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} else {
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dir = 1;
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}
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complement_code = (long)raw_code * dir;
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return complement_code;
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}
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/*
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* CURRENT is a SIGNED 16bit register(0x0E 0x0F) that reports current A/D converter
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* result of the voltage across the current sense resistor, 10mohm typical.
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* The result is stored as a two's complement value to show positive and negative current.
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* Voltages outside the minimum and maximum register values are reported as the
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* minimum or maximum value. The register value should be divided by the sense
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* resistance to convert to amperes. The value of the sense resistor determines
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* the resolution and the full-scale range of the current readings. The LSB of 0x0F
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* is (52.4/32768)uV for CW2215 and CW2217. The LSB of 0x0F is (125/32768)uV for CW2218.
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* The default value is 0x0000, stands for 0mA. 0x7FFF stands for the maximum charging
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* current and 0x8001 stands for the maximum discharging current.
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*/
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static int cw_get_current(struct cw_battery *cw_bat)
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{
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unsigned char reg_val[2] = {0, 0};
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unsigned short current_reg; /* unsigned short must u16 */
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long long cw_current; /* use long long type to guarantee 8 bytes space */
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int ret;
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ret = cw_read_word(cw_bat->client, REG_CURRENT_H, reg_val);
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if (ret < 0)
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return ret;
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current_reg = (reg_val[0] << 8) + reg_val[1];
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cw_current = get_complement_code(current_reg);
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if (((cw_bat->fw_version & CW2215_MARK) != 0) || ((cw_bat->fw_version & CW2217_MARK) != 0))
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cw_current = cw_current * 1600 / USER_RSENSE;
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else if ((cw_bat->fw_version != 0) && ((cw_bat->fw_version & 0xC0) == CW2218_MARK))
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cw_current = cw_current * 3815 / USER_RSENSE;
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else {
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cw_bat->cw_current = 0;
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dev_err(cw_bat->dev, "error! cw221x firmware read error!\n");
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}
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cw_bat->cw_current = cw_current;
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return 0;
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}
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/*
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* CYCLECNT is an UNSIGNED 16bit register(0xA4 0xA5) that counts cycle life of the battery.
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* The LSB of 0xA5 stands for 1/16 cycle. This register will be clear after enters shutdown mode
|
*/
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static int cw_get_cycle_count(struct cw_battery *cw_bat)
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{
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unsigned char reg_val[2] = {0, 0};
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int cycle;
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int ret;
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ret = cw_read_word(cw_bat->client, REG_CYCLE_H, reg_val);
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if (ret < 0)
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return ret;
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cycle = (reg_val[0] << 8) + reg_val[1];
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cw_bat->cycle = cycle / 16;
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return 0;
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}
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/*
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* SOH (State of Health) is an UNSIGNED 8bit register(0xA6) that represents the level of
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* battery aging by tracking battery internal impedance increment. When the device enters
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* active mode, this register refresh to 0x64 by default. Its range is 0x00 to 0x64,
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* indicating 0 to 100%. This register will be clear after enters shutdown mode.
|
*/
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static int cw_get_soh(struct cw_battery *cw_bat)
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{
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int ret;
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unsigned char reg_val;
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int soh;
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ret = cw_read(cw_bat->client, REG_SOH, ®_val);
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if (ret < 0)
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return ret;
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soh = reg_val;
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cw_bat->soh = soh;
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return 0;
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}
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/*
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* FW_VERSION register reports the firmware (FW) running in the chip. It is fixed to
|
* 0x00 when the chip is in shutdown mode. When in active mode, Bit [7:6] = '01' stand
|
* for the CW2217, Bit [7:6] = '00' stand for the CW2218 and Bit [7:6] = '10' stand for CW2215.
|
* Bit[5:0] stand for the FW version running in the chip. Note that the FW version is
|
* subject to update and contact sales office for confirmation when necessary.
|
*/
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static int cw_get_fw_version(struct cw_battery *cw_bat)
|
{
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int ret;
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unsigned char reg_val;
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int fw_version;
|
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ret = cw_read(cw_bat->client, REG_FW_VERSION, ®_val);
|
if (ret < 0)
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return ret;
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fw_version = reg_val;
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cw_bat->fw_version = fw_version;
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return 0;
|
}
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static int cw_update_data(struct cw_battery *cw_bat)
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{
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int ret = 0;
|
|
ret += cw_get_voltage(cw_bat);
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ret += cw_get_capacity(cw_bat);
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ret += cw_get_temp(cw_bat);
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ret += cw_get_current(cw_bat);
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ret += cw_get_cycle_count(cw_bat);
|
ret += cw_get_soh(cw_bat);
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cw_printk("vol = %d current = %ld cap = %d temp = %d\n",
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cw_bat->voltage, cw_bat->cw_current, cw_bat->ui_soc, cw_bat->temp);
|
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return ret;
|
}
|
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static int cw_init_data(struct cw_battery *cw_bat)
|
{
|
int ret = 0;
|
|
ret = cw_get_fw_version(cw_bat);
|
if (ret != 0)
|
return ret;
|
|
ret += cw_get_chip_id(cw_bat);
|
ret += cw_get_voltage(cw_bat);
|
ret += cw_get_capacity(cw_bat);
|
ret += cw_get_temp(cw_bat);
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ret += cw_get_current(cw_bat);
|
ret += cw_get_cycle_count(cw_bat);
|
ret += cw_get_soh(cw_bat);
|
|
cw_printk("chip_id = %d vol = %d cur = %ld cap = %d temp = %d fw_version = %d\n",
|
cw_bat->chip_id, cw_bat->voltage, cw_bat->cw_current,
|
cw_bat->ui_soc, cw_bat->temp, cw_bat->fw_version);
|
|
return ret;
|
}
|
|
static int cw221x_parse_properties(struct cw_battery *cw_bat)
|
{
|
struct device *dev = cw_bat->dev;
|
int length;
|
int ret;
|
|
length = device_property_count_u8(dev, "cellwise,battery-profile");
|
if (length < 0) {
|
dev_warn(cw_bat->dev,
|
"No battery-profile found, using current flash contents\n");
|
} else if (length != SIZE_OF_PROFILE) {
|
dev_err(cw_bat->dev, "battery-profile must be %d bytes\n",
|
SIZE_OF_PROFILE);
|
return -EINVAL;
|
}
|
|
cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL);
|
if (!cw_bat->bat_profile)
|
return -ENOMEM;
|
|
ret = device_property_read_u8_array(dev,
|
"cellwise,battery-profile",
|
cw_bat->bat_profile,
|
length);
|
|
return ret;
|
}
|
|
static void cw_config_profile_init(struct cw_battery *cw_bat)
|
{
|
int i, ret;
|
|
ret = cw221x_parse_properties(cw_bat);
|
if (ret) {
|
/* update new battery info */
|
cw_bat->bat_profile = config_profile_info;
|
cw_printk("the driver profile:\n");
|
}
|
|
for (i = 0; i < SIZE_OF_PROFILE; i++)
|
cw_printk("[%d]: 0x%x\n", i, cw_bat->bat_profile[i]);
|
}
|
|
/*CW221X update profile function, Often called during initialization*/
|
static int cw_config_start_ic(struct cw_battery *cw_bat)
|
{
|
unsigned char reg_val;
|
int count = 0;
|
int i, ret;
|
|
ret = cw221X_sleep(cw_bat);
|
if (ret < 0)
|
return ret;
|
|
/* update new battery info */
|
ret = cw_write_profile(cw_bat->client, cw_bat->bat_profile);
|
if (ret < 0)
|
return ret;
|
|
cw_printk("the driver profile:\n");
|
for (i = 0; i < SIZE_OF_PROFILE; i++)
|
cw_printk("[%d]: 0x%x\n", i, cw_bat->bat_profile[i]);
|
|
/* set UPDATE_FLAG AND SOC INTTERRUP VALUE */
|
reg_val = CONFIG_UPDATE_FLG | GPIO_SOC_IRQ_VALUE;
|
ret = cw_write(cw_bat->client, REG_SOC_ALERT, ®_val);
|
if (ret < 0)
|
return ret;
|
|
/* close all interruptes */
|
reg_val = 0;
|
ret = cw_write(cw_bat->client, REG_GPIO_CONFIG, ®_val);
|
if (ret < 0)
|
return ret;
|
|
ret = cw221X_active(cw_bat);
|
if (ret < 0)
|
return ret;
|
|
while (CW_TRUE) {
|
msleep(CW_SLEEP_100MS);
|
cw_read(cw_bat->client, REG_IC_STATE, ®_val);
|
if (IC_READY_MARK == (reg_val & IC_READY_MARK))
|
break;
|
count++;
|
if (count >= CW_SLEEP_COUNTS) {
|
cw221X_sleep(cw_bat);
|
return -1;
|
}
|
}
|
|
return 0;
|
}
|
|
/*
|
* Get the cw221X running state
|
* Determine whether the profile needs to be updated
|
*/
|
static int cw221X_get_state(struct cw_battery *cw_bat)
|
{
|
int ret;
|
unsigned char reg_val;
|
int i;
|
int reg_profile;
|
|
ret = cw_read(cw_bat->client, REG_MODE_CONFIG, ®_val);
|
if (ret < 0)
|
return ret;
|
if (reg_val != CONFIG_MODE_ACTIVE)
|
return CW221X_NOT_ACTIVE;
|
|
ret = cw_read(cw_bat->client, REG_SOC_ALERT, ®_val);
|
if (ret < 0)
|
return ret;
|
if (0x00 == (reg_val & CONFIG_UPDATE_FLG))
|
return CW221X_PROFILE_NOT_READY;
|
|
for (i = 0; i < SIZE_OF_PROFILE; i++) {
|
ret = cw_read(cw_bat->client, (REG_BAT_PROFILE + i), ®_val);
|
if (ret < 0)
|
return ret;
|
reg_profile = REG_BAT_PROFILE + i;
|
cw_printk("fuelgauge: 0x%2x = 0x%2x\n", reg_profile, reg_val);
|
if (cw_bat->bat_profile[i] != reg_val)
|
break;
|
}
|
if (i != SIZE_OF_PROFILE)
|
return CW221X_PROFILE_NEED_UPDATE;
|
|
return 0;
|
}
|
|
/* CW221X init function, Often called during initialization */
|
static int cw_init(struct cw_battery *cw_bat)
|
{
|
int ret;
|
|
ret = cw_get_chip_id(cw_bat);
|
if (ret < 0) {
|
dev_err(cw_bat->dev, "iic read write error");
|
return ret;
|
}
|
if (cw_bat->chip_id != IC_VCHIP_ID) {
|
dev_err(cw_bat->dev, "not cw221X\n");
|
return -1;
|
}
|
|
ret = cw221X_get_state(cw_bat);
|
if (ret < 0) {
|
dev_err(cw_bat->dev, "iic read write error");
|
return ret;
|
}
|
|
if (ret != 0) {
|
cw_printk("need update profile\n");
|
|
ret = cw_config_start_ic(cw_bat);
|
if (ret < 0)
|
return ret;
|
} else
|
cw_printk("not need update profile\n");
|
cw_printk("cw221X init success!\n");
|
|
return 0;
|
}
|
|
static void cw_bat_work(struct work_struct *work)
|
{
|
struct delayed_work *delay_work;
|
struct cw_battery *cw_bat;
|
static int soc;
|
int ret;
|
|
delay_work = container_of(work,
|
struct delayed_work,
|
work);
|
cw_bat = container_of(delay_work,
|
struct cw_battery,
|
battery_delay_work);
|
|
ret = cw_update_data(cw_bat);
|
if (ret < 0)
|
dev_err(cw_bat->dev, "i2c read error when update data");
|
if (cw_bat->ui_soc != soc) {
|
soc = cw_bat->ui_soc;
|
power_supply_changed(cw_bat->cw_bat);
|
}
|
queue_delayed_work(cw_bat->cwfg_workqueue,
|
&cw_bat->battery_delay_work,
|
msecs_to_jiffies(queue_delayed_work_time));
|
}
|
|
static int cw_battery_set_property(struct power_supply *psy,
|
enum power_supply_property psp,
|
const union power_supply_propval *val)
|
{
|
/* struct cw_battery *cw_bat = power_supply_get_drvdata(psy); */
|
int ret = 0;
|
|
switch (psp) {
|
default:
|
ret = -EINVAL;
|
break;
|
}
|
|
return ret;
|
}
|
|
static int cw_battery_get_property(struct power_supply *psy,
|
enum power_supply_property psp,
|
union power_supply_propval *val)
|
{
|
struct cw_battery *cw_bat = power_supply_get_drvdata(psy);
|
int ret = 0;
|
|
switch (psp) {
|
case POWER_SUPPLY_PROP_CYCLE_COUNT:
|
val->intval = cw_bat->cycle;
|
break;
|
case POWER_SUPPLY_PROP_CAPACITY:
|
val->intval = cw_bat->ui_soc;
|
break;
|
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
|
if ((cw_bat->ui_soc < 1) && (!power_supply_is_system_supplied()))
|
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
|
else if (cw_bat->ui_soc <= 20)
|
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
|
else if (cw_bat->ui_soc <= 70)
|
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
|
else if (cw_bat->ui_soc <= 90)
|
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
|
else
|
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
|
break;
|
case POWER_SUPPLY_PROP_STATUS:
|
if (cw_bat->ui_soc == 100 * 1000)
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
else {
|
if (power_supply_is_system_supplied())
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
else
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
}
|
break;
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
val->intval = 10 * 1000 * 1000;/* uAh */
|
break;
|
case POWER_SUPPLY_PROP_HEALTH:
|
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
break;
|
case POWER_SUPPLY_PROP_PRESENT:
|
val->intval = (cw_bat->voltage <= 0) ? 0 : 1;
|
break;
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
cw_get_voltage(cw_bat);
|
val->intval = cw_bat->voltage * CW_VOL_UNIT;
|
break;
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
cw_get_current(cw_bat);
|
val->intval = cw_bat->cw_current * 1000; /* uA */
|
break;
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
|
break;
|
case POWER_SUPPLY_PROP_TEMP:
|
val->intval = cw_bat->temp;
|
break;
|
default:
|
ret = -EINVAL;
|
break;
|
}
|
|
return ret;
|
}
|
|
static enum power_supply_property cw_battery_properties[] = {
|
POWER_SUPPLY_PROP_CYCLE_COUNT,
|
POWER_SUPPLY_PROP_CAPACITY,
|
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
|
POWER_SUPPLY_PROP_HEALTH,
|
POWER_SUPPLY_PROP_PRESENT,
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
POWER_SUPPLY_PROP_TECHNOLOGY,
|
POWER_SUPPLY_PROP_STATUS,
|
POWER_SUPPLY_PROP_TEMP,
|
};
|
|
static int cw221X_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
{
|
struct power_supply_config psy_cfg = {0};
|
struct power_supply_desc *psy_desc;
|
struct cw_battery *cw_bat;
|
int loop = 0;
|
int ret;
|
|
cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL);
|
if (!cw_bat)
|
return -ENOMEM;
|
|
i2c_set_clientdata(client, cw_bat);
|
cw_bat->client = client;
|
cw_bat->dev = &client->dev;
|
|
dev_dbg(cw_bat->dev, "cw221X driver versions-%d\n", 20220830);
|
cw_config_profile_init(cw_bat);
|
ret = cw_init(cw_bat);
|
while ((loop++ < CW_RETRY_COUNT) && (ret != 0)) {
|
msleep(CW_SLEEP_200MS);
|
ret = cw_init(cw_bat);
|
}
|
if (ret) {
|
dev_err(cw_bat->dev, "cw221X init fail!\n");
|
return ret;
|
}
|
|
ret = cw_init_data(cw_bat);
|
if (ret) {
|
dev_err(cw_bat->dev, "cw221X init data fail!\n");
|
return ret;
|
}
|
|
psy_desc = devm_kzalloc(&client->dev, sizeof(*psy_desc), GFP_KERNEL);
|
if (!psy_desc)
|
return -ENOMEM;
|
psy_cfg.drv_data = cw_bat;
|
psy_desc->name = CW_PROPERTIES;
|
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
|
psy_desc->properties = cw_battery_properties;
|
psy_desc->num_properties = ARRAY_SIZE(cw_battery_properties);
|
psy_desc->get_property = cw_battery_get_property;
|
psy_desc->set_property = cw_battery_set_property;
|
cw_bat->cw_bat = devm_power_supply_register(&client->dev, psy_desc, &psy_cfg);
|
if (IS_ERR(cw_bat->cw_bat)) {
|
ret = PTR_ERR(cw_bat->cw_bat);
|
dev_err(cw_bat->dev, "failed to register battery: %d\n", ret);
|
return ret;
|
}
|
|
cw_bat->cwfg_workqueue = create_singlethread_workqueue("cwfg_gauge");
|
INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
|
queue_delayed_work(cw_bat->cwfg_workqueue,
|
&cw_bat->battery_delay_work,
|
msecs_to_jiffies(queue_start_work_time));
|
|
cw_printk("cw221X driver probe success!\n");
|
|
return 0;
|
}
|
|
static int cw221X_remove(struct i2c_client *client)
|
{
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
|
cancel_delayed_work_sync(&cw_bat->battery_delay_work);
|
destroy_workqueue(cw_bat->cwfg_workqueue);
|
return 0;
|
}
|
|
#ifdef CONFIG_PM
|
static int cw_bat_suspend(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
|
cancel_delayed_work(&cw_bat->battery_delay_work);
|
return 0;
|
}
|
|
static int cw_bat_resume(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
|
queue_delayed_work(cw_bat->cwfg_workqueue,
|
&cw_bat->battery_delay_work,
|
msecs_to_jiffies(20));
|
return 0;
|
}
|
|
static const struct dev_pm_ops cw_bat_pm_ops = {
|
.suspend = cw_bat_suspend,
|
.resume = cw_bat_resume,
|
};
|
#endif
|
|
static const struct i2c_device_id cw221X_id_table[] = {
|
{ CWFG_NAME, 0 },
|
{ }
|
};
|
MODULE_DEVICE_TABLE(i2c, cw221X_id_table);
|
|
#ifdef CONFIG_OF
|
static const struct of_device_id cw221X_match_table[] = {
|
{ .compatible = "cellwise,cw221X", },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, cw221X_match_table);
|
#endif
|
|
static struct i2c_driver cw221X_driver = {
|
.driver = {
|
.name = CWFG_NAME,
|
#ifdef CONFIG_PM
|
.pm = &cw_bat_pm_ops,
|
#endif
|
.owner = THIS_MODULE,
|
.of_match_table = of_match_ptr(cw221X_match_table),
|
},
|
.probe = cw221X_probe,
|
.remove = cw221X_remove,
|
.id_table = cw221X_id_table,
|
};
|
|
module_i2c_driver(cw221X_driver);
|
|
MODULE_AUTHOR("Xu Shengfei <xsf@rock-chips.com>");
|
MODULE_DESCRIPTION("CW221X FGADC Device Driver V0.1");
|
MODULE_LICENSE("GPL");
|
