Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * I2C client/driver for the Linear Technology LTC2941, LTC2942, LTC2943
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * and LTC2944 Battery Gas Gauge IC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2014 Topic Embedded Systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Author: Auryn Verwegen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Author: Mike Looijmans
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/swab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define I16_MSB(x)			((x >> 8) & 0xFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define I16_LSB(x)			(x & 0xFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define LTC294X_WORK_DELAY		10	/* Update delay in seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define LTC294X_MAX_VALUE		0xFFFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define LTC294X_MID_SUPPLY		0x7FFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define LTC2941_MAX_PRESCALER_EXP	7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define LTC2943_MAX_PRESCALER_EXP	6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) enum ltc294x_reg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	LTC294X_REG_STATUS		= 0x00,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	LTC294X_REG_CONTROL		= 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	LTC294X_REG_ACC_CHARGE_MSB	= 0x02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	LTC294X_REG_ACC_CHARGE_LSB	= 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	LTC294X_REG_CHARGE_THR_HIGH_MSB	= 0x04,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	LTC294X_REG_CHARGE_THR_HIGH_LSB	= 0x05,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	LTC294X_REG_CHARGE_THR_LOW_MSB	= 0x06,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	LTC294X_REG_CHARGE_THR_LOW_LSB	= 0x07,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	LTC294X_REG_VOLTAGE_MSB		= 0x08,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	LTC294X_REG_VOLTAGE_LSB		= 0x09,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	LTC2942_REG_TEMPERATURE_MSB	= 0x0C,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	LTC2942_REG_TEMPERATURE_LSB	= 0x0D,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	LTC2943_REG_CURRENT_MSB		= 0x0E,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	LTC2943_REG_CURRENT_LSB		= 0x0F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	LTC2943_REG_TEMPERATURE_MSB	= 0x14,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	LTC2943_REG_TEMPERATURE_LSB	= 0x15,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) enum ltc294x_id {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	LTC2941_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	LTC2942_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	LTC2943_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	LTC2944_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define LTC2941_REG_STATUS_CHIP_ID	BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define LTC2942_REG_CONTROL_MODE_SCAN	(BIT(7) | BIT(6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #define LTC2943_REG_CONTROL_MODE_SCAN	BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #define LTC294X_REG_CONTROL_PRESCALER_MASK	(BIT(5) | BIT(4) | BIT(3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #define LTC294X_REG_CONTROL_SHUTDOWN_MASK	(BIT(0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define LTC294X_REG_CONTROL_PRESCALER_SET(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	((x << 3) & LTC294X_REG_CONTROL_PRESCALER_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #define LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #define LTC294X_REG_CONTROL_ADC_DISABLE(x)	((x) & ~(BIT(7) | BIT(6)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) struct ltc294x_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct i2c_client *client;	/* I2C Client pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct power_supply *supply;	/* Supply pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct power_supply_desc supply_desc;	/* Supply description */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct delayed_work work;	/* Work scheduler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	enum ltc294x_id id;		/* Chip type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int charge;	/* Last charge register content */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int r_sense;	/* mOhm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	int Qlsb;	/* nAh */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static inline int convert_bin_to_uAh(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	const struct ltc294x_info *info, int Q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return ((Q * (info->Qlsb / 10))) / 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static inline int convert_uAh_to_bin(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	const struct ltc294x_info *info, int uAh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	int Q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	Q = (uAh * 100) / (info->Qlsb/10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return (Q < LTC294X_MAX_VALUE) ? Q : LTC294X_MAX_VALUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static int ltc294x_read_regs(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	enum ltc294x_reg reg, u8 *buf, int num_regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct i2c_msg msgs[2] = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	u8 reg_start = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	msgs[0].addr	= client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	msgs[0].len	= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	msgs[0].buf	= &reg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	msgs[1].addr	= client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	msgs[1].len	= num_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	msgs[1].buf	= buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	msgs[1].flags	= I2C_M_RD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ret = i2c_transfer(client->adapter, &msgs[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		dev_err(&client->dev, "ltc2941 read_reg failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	dev_dbg(&client->dev, "%s (%#x, %d) -> %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		__func__, reg, num_regs, *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int ltc294x_write_regs(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	enum ltc294x_reg reg, const u8 *buf, int num_regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	u8 reg_start = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ret = i2c_smbus_write_i2c_block_data(client, reg_start, num_regs, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		dev_err(&client->dev, "ltc2941 write_reg failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	dev_dbg(&client->dev, "%s (%#x, %d) -> %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		__func__, reg, num_regs, *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int ltc294x_reset(const struct ltc294x_info *info, int prescaler_exp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	u8 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	u8 control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	/* Read status and control registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		dev_err(&info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			"Could not read registers from device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		goto error_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	control = LTC294X_REG_CONTROL_PRESCALER_SET(prescaler_exp) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/* Put device into "monitor" mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	switch (info->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	case LTC2942_ID:	/* 2942 measures every 2 sec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		control |= LTC2942_REG_CONTROL_MODE_SCAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	case LTC2943_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	case LTC2944_ID:	/* 2943 and 2944 measure every 10 sec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		control |= LTC2943_REG_CONTROL_MODE_SCAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (value != control) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		ret = ltc294x_write_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			LTC294X_REG_CONTROL, &control, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			dev_err(&info->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 				"Could not write register\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			goto error_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) error_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static int ltc294x_read_charge_register(const struct ltc294x_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 					enum ltc294x_reg reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	u8 datar[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	ret = ltc294x_read_regs(info->client, reg, &datar[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return (datar[0] << 8) + datar[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static int ltc294x_get_charge(const struct ltc294x_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				enum ltc294x_reg reg, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	int value = ltc294x_read_charge_register(info, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (value < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	/* When r_sense < 0, this counts up when the battery discharges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (info->Qlsb < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		value -= 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	*val = convert_bin_to_uAh(info, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int ltc294x_set_charge_now(const struct ltc294x_info *info, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	u8 dataw[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	u8 ctrl_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	s32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	value = convert_uAh_to_bin(info, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	/* Direction depends on how sense+/- were connected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (info->Qlsb < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		value += 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if ((value < 0) || (value > 0xFFFF)) /* input validation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	/* Read control register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	ret = ltc294x_read_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		LTC294X_REG_CONTROL, &ctrl_reg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	/* Disable analog section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	ctrl_reg |= LTC294X_REG_CONTROL_SHUTDOWN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	ret = ltc294x_write_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		LTC294X_REG_CONTROL, &ctrl_reg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	/* Set new charge value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	dataw[0] = I16_MSB(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	dataw[1] = I16_LSB(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	ret = ltc294x_write_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		LTC294X_REG_ACC_CHARGE_MSB, &dataw[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		goto error_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	/* Enable analog section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) error_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	ctrl_reg &= ~LTC294X_REG_CONTROL_SHUTDOWN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ret = ltc294x_write_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		LTC294X_REG_CONTROL, &ctrl_reg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return ret < 0 ? ret : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int ltc294x_set_charge_thr(const struct ltc294x_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 					enum ltc294x_reg reg, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	u8 dataw[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	s32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	value = convert_uAh_to_bin(info, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	/* Direction depends on how sense+/- were connected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (info->Qlsb < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		value += 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if ((value < 0) || (value > 0xFFFF)) /* input validation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	/* Set new charge value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	dataw[0] = I16_MSB(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	dataw[1] = I16_LSB(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	return ltc294x_write_regs(info->client, reg, &dataw[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static int ltc294x_get_charge_counter(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	const struct ltc294x_info *info, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	int value = ltc294x_read_charge_register(info, LTC294X_REG_ACC_CHARGE_MSB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (value < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	value -= LTC294X_MID_SUPPLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	*val = convert_bin_to_uAh(info, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static int ltc294x_get_voltage(const struct ltc294x_info *info, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	u8 datar[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	u32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	ret = ltc294x_read_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		LTC294X_REG_VOLTAGE_MSB, &datar[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	value = (datar[0] << 8) | datar[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	switch (info->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	case LTC2943_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		value *= 23600 * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		value /= 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		value *= 1000 / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	case LTC2944_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		value *= 70800 / 5*4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		value /= 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		value *= 1000 * 5/4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		value *= 6000 * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		value /= 0xFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		value *= 1000 / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	*val = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static int ltc294x_get_current(const struct ltc294x_info *info, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	u8 datar[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	s32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	ret = ltc294x_read_regs(info->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		LTC2943_REG_CURRENT_MSB, &datar[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	value = (datar[0] << 8) | datar[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	value -= 0x7FFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	if (info->id == LTC2944_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		value *= 64000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		value *= 60000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	/* Value is in range -32k..+32k, r_sense is usually 10..50 mOhm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	 * the formula below keeps everything in s32 range while preserving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	 * enough digits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	*val = 1000 * (value / (info->r_sense * 0x7FFF)); /* in uA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static int ltc294x_get_temperature(const struct ltc294x_info *info, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	enum ltc294x_reg reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	u8 datar[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	u32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (info->id == LTC2942_ID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		reg = LTC2942_REG_TEMPERATURE_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		value = 6000;	/* Full-scale is 600 Kelvin */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		reg = LTC2943_REG_TEMPERATURE_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		value = 5100;	/* Full-scale is 510 Kelvin */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	ret = ltc294x_read_regs(info->client, reg, &datar[0], 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	value *= (datar[0] << 8) | datar[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	/* Convert to tenths of degree Celsius */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	*val = value / 0xFFFF - 2722;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static int ltc294x_get_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 				enum power_supply_property prop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 				union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	struct ltc294x_info *info = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	switch (prop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	case POWER_SUPPLY_PROP_CHARGE_FULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		return ltc294x_get_charge(info, LTC294X_REG_CHARGE_THR_HIGH_MSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 						&val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		return ltc294x_get_charge(info, LTC294X_REG_CHARGE_THR_LOW_MSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 						&val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	case POWER_SUPPLY_PROP_CHARGE_NOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		return ltc294x_get_charge(info, LTC294X_REG_ACC_CHARGE_MSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 						&val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		return ltc294x_get_charge_counter(info, &val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		return ltc294x_get_voltage(info, &val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	case POWER_SUPPLY_PROP_CURRENT_NOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		return ltc294x_get_current(info, &val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	case POWER_SUPPLY_PROP_TEMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		return ltc294x_get_temperature(info, &val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static int ltc294x_set_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	const union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	struct ltc294x_info *info = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	case POWER_SUPPLY_PROP_CHARGE_FULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		return ltc294x_set_charge_thr(info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 			LTC294X_REG_CHARGE_THR_HIGH_MSB, val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		return ltc294x_set_charge_thr(info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 			LTC294X_REG_CHARGE_THR_LOW_MSB, val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	case POWER_SUPPLY_PROP_CHARGE_NOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		return ltc294x_set_charge_now(info, val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) static int ltc294x_property_is_writeable(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	struct power_supply *psy, enum power_supply_property psp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	case POWER_SUPPLY_PROP_CHARGE_FULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	case POWER_SUPPLY_PROP_CHARGE_NOW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static void ltc294x_update(struct ltc294x_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	int charge = ltc294x_read_charge_register(info, LTC294X_REG_ACC_CHARGE_MSB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	if (charge != info->charge) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		info->charge = charge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		power_supply_changed(info->supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) static void ltc294x_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	struct ltc294x_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	info = container_of(work, struct ltc294x_info, work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	ltc294x_update(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) static enum power_supply_property ltc294x_properties[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	POWER_SUPPLY_PROP_CHARGE_FULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	POWER_SUPPLY_PROP_CHARGE_EMPTY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	POWER_SUPPLY_PROP_CHARGE_NOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	POWER_SUPPLY_PROP_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	POWER_SUPPLY_PROP_CURRENT_NOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static int ltc294x_i2c_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	struct ltc294x_info *info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	cancel_delayed_work_sync(&info->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	power_supply_unregister(info->supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static int ltc294x_i2c_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	struct power_supply_config psy_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	struct ltc294x_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	u32 prescaler_exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	s32 r_sense;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	u8 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	if (info == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	i2c_set_clientdata(client, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	np = of_node_get(client->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	info->id = (enum ltc294x_id) (uintptr_t) of_device_get_match_data(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 							&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	info->supply_desc.name = np->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	/* r_sense can be negative, when sense+ is connected to the battery
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	 * instead of the sense-. This results in reversed measurements. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	ret = of_property_read_u32(np, "lltc,resistor-sense", &r_sense);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 		dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 			"Could not find lltc,resistor-sense in devicetree\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	info->r_sense = r_sense;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	ret = of_property_read_u32(np, "lltc,prescaler-exponent",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 		&prescaler_exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 		dev_warn(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 			"lltc,prescaler-exponent not in devicetree\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 		prescaler_exp = LTC2941_MAX_PRESCALER_EXP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	if (info->id == LTC2943_ID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 		if (prescaler_exp > LTC2943_MAX_PRESCALER_EXP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 			prescaler_exp = LTC2943_MAX_PRESCALER_EXP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) 		info->Qlsb = ((340 * 50000) / r_sense) /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 				(4096 / (1 << (2*prescaler_exp)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 		if (prescaler_exp > LTC2941_MAX_PRESCALER_EXP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 			prescaler_exp = LTC2941_MAX_PRESCALER_EXP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 		info->Qlsb = ((85 * 50000) / r_sense) /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 				(128 / (1 << prescaler_exp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 	/* Read status register to check for LTC2942 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 	if (info->id == LTC2941_ID || info->id == LTC2942_ID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 		ret = ltc294x_read_regs(client, LTC294X_REG_STATUS, &status, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 			dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 				"Could not read status register\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 		if (status & LTC2941_REG_STATUS_CHIP_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 			info->id = LTC2941_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 			info->id = LTC2942_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 	info->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	info->supply_desc.type = POWER_SUPPLY_TYPE_BATTERY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	info->supply_desc.properties = ltc294x_properties;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 	switch (info->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 	case LTC2944_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 	case LTC2943_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 		info->supply_desc.num_properties =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 			ARRAY_SIZE(ltc294x_properties);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 	case LTC2942_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 		info->supply_desc.num_properties =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 			ARRAY_SIZE(ltc294x_properties) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 	case LTC2941_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 		info->supply_desc.num_properties =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 			ARRAY_SIZE(ltc294x_properties) - 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 	info->supply_desc.get_property = ltc294x_get_property;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 	info->supply_desc.set_property = ltc294x_set_property;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 	info->supply_desc.property_is_writeable = ltc294x_property_is_writeable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 	info->supply_desc.external_power_changed	= NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 	psy_cfg.drv_data = info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 	INIT_DELAYED_WORK(&info->work, ltc294x_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 	ret = ltc294x_reset(info, prescaler_exp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 		dev_err(&client->dev, "Communication with chip failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) 	info->supply = power_supply_register(&client->dev, &info->supply_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 					     &psy_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) 	if (IS_ERR(info->supply)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 		dev_err(&client->dev, "failed to register ltc2941\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) 		return PTR_ERR(info->supply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) 		schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) static void ltc294x_i2c_shutdown(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) 	struct ltc294x_info *info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) 	u8 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) 	u8 control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) 	/* The LTC2941 does not need any special handling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) 	if (info->id == LTC2941_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) 	/* Read control register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) 	ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) 	/* Disable continuous ADC conversion as this drains the battery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) 	control = LTC294X_REG_CONTROL_ADC_DISABLE(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) 	if (control != value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) 		ltc294x_write_regs(info->client, LTC294X_REG_CONTROL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) 			&control, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static int ltc294x_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) 	struct ltc294x_info *info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) 	cancel_delayed_work(&info->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) static int ltc294x_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) 	struct ltc294x_info *info = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) 	schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) static SIMPLE_DEV_PM_OPS(ltc294x_pm_ops, ltc294x_suspend, ltc294x_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) #define LTC294X_PM_OPS (&ltc294x_pm_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) #define LTC294X_PM_OPS NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) #endif /* CONFIG_PM_SLEEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) static const struct i2c_device_id ltc294x_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) 	{ "ltc2941", LTC2941_ID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) 	{ "ltc2942", LTC2942_ID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) 	{ "ltc2943", LTC2943_ID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) 	{ "ltc2944", LTC2944_ID, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) MODULE_DEVICE_TABLE(i2c, ltc294x_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) static const struct of_device_id ltc294x_i2c_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) 		.compatible = "lltc,ltc2941",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) 		.data = (void *)LTC2941_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) 		.compatible = "lltc,ltc2942",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) 		.data = (void *)LTC2942_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) 		.compatible = "lltc,ltc2943",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) 		.data = (void *)LTC2943_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) 		.compatible = "lltc,ltc2944",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) 		.data = (void *)LTC2944_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) MODULE_DEVICE_TABLE(of, ltc294x_i2c_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) static struct i2c_driver ltc294x_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) 		.name	= "LTC2941",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) 		.of_match_table = ltc294x_i2c_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) 		.pm	= LTC294X_PM_OPS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) 	.probe		= ltc294x_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) 	.remove		= ltc294x_i2c_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) 	.shutdown	= ltc294x_i2c_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) 	.id_table	= ltc294x_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) module_i2c_driver(ltc294x_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) MODULE_AUTHOR("Auryn Verwegen, Topic Embedded Systems");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) MODULE_AUTHOR("Mike Looijmans, Topic Embedded Products");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) MODULE_DESCRIPTION("LTC2941/LTC2942/LTC2943/LTC2944 Battery Gas Gauge IC driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) MODULE_LICENSE("GPL");