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ed4e2c7570
.probe_new() doesn't get the i2c_device_id * parameter, so determine that explicitly in the probe function. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
1170 lines
29 KiB
C
1170 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// BQ2515X Battery Charger Driver
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// Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/gpio/consumer.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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#define BQ2515X_MANUFACTURER "Texas Instruments"
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#define BQ2515X_STAT0 0x00
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#define BQ2515X_STAT1 0x01
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#define BQ2515X_STAT2 0x02
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#define BQ2515X_FLAG0 0x03
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#define BQ2515X_FLAG1 0x04
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#define BQ2515X_FLAG2 0x05
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#define BQ2515X_FLAG3 0x06
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#define BQ2515X_MASK0 0x07
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#define BQ2515X_MASK1 0x08
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#define BQ2515X_MASK2 0x09
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#define BQ2515X_MASK3 0x0a
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#define BQ2515X_VBAT_CTRL 0x12
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#define BQ2515X_ICHG_CTRL 0x13
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#define BQ2515X_PCHRGCTRL 0x14
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#define BQ2515X_TERMCTRL 0x15
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#define BQ2515X_BUVLO 0x16
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#define BQ2515X_CHARGERCTRL0 0x17
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#define BQ2515X_CHARGERCTRL1 0x18
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#define BQ2515X_ILIMCTRL 0x19
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#define BQ2515X_LDOCTRL 0x1d
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#define BQ2515X_MRCTRL 0x30
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#define BQ2515X_ICCTRL0 0x35
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#define BQ2515X_ICCTRL1 0x36
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#define BQ2515X_ICCTRL2 0x37
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#define BQ2515X_ADCCTRL0 0x40
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#define BQ2515X_ADCCTRL1 0x41
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#define BQ2515X_ADC_VBAT_M 0x42
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#define BQ2515X_ADC_VBAT_L 0x43
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#define BQ2515X_ADC_TS_M 0x44
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#define BQ2515X_ADC_TS_L 0x45
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#define BQ2515X_ADC_ICHG_M 0x46
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#define BQ2515X_ADC_ICHG_L 0x47
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#define BQ2515X_ADC_ADCIN_M 0x48
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#define BQ2515X_ADC_ADCIN_L 0x49
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#define BQ2515X_ADC_VIN_M 0x4a
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#define BQ2515X_ADC_VIN_L 0x4b
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#define BQ2515X_ADC_PMID_M 0x4c
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#define BQ2515X_ADC_PMID_L 0x4d
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#define BQ2515X_ADC_IIN_M 0x4e
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#define BQ2515X_ADC_IIN_L 0x4f
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#define BQ2515X_ADC_COMP1_M 0x52
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#define BQ2515X_ADC_COMP1_L 0X53
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#define BQ2515X_ADC_COMP2_M 0X54
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#define BQ2515X_ADC_COMP2_L 0x55
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#define BQ2515X_ADC_COMP3_M 0x56
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#define BQ2515X_ADC_COMP3_L 0x57
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#define BQ2515X_ADC_READ_EN 0x58
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#define BQ2515X_TS_FASTCHGCTRL 0x61
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#define BQ2515X_TS_COLD 0x62
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#define BQ2515X_TS_COOL 0x63
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#define BQ2515X_TS_WARM 0x64
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#define BQ2515X_TS_HOT 0x65
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#define BQ2515X_DEVICE_ID 0x6f
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#define BQ2515X_DEFAULT_ICHG_UA 10000
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#define BQ25150_DEFAULT_ILIM_UA 100000
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#define BQ25155_DEFAULT_ILIM_UA 500000
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#define BQ2515X_DEFAULT_VBAT_REG_UV 4200000
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#define BQ2515X_DEFAULT_IPRECHARGE_UA 2500
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#define BQ2515X_DIVISOR 65536
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#define BQ2515X_VBAT_BASE_VOLT 3600000
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#define BQ2515X_VBAT_REG_MAX 4600000
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#define BQ2515X_VBAT_REG_MIN 3600000
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#define BQ2515X_VBAT_STEP_UV 10000
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#define BQ2515X_UV_FACTOR 1000000
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#define BQ2515X_VBAT_MULTIPLIER 6
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#define BQ2515X_ICHG_DIVISOR 52429
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#define BQ2515X_ICHG_CURR_STEP_THRESH_UA 318750
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#define BQ2515X_ICHG_MIN_UA 0
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#define BQ2515X_ICHG_MAX_UA 500000
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#define BQ2515X_ICHG_RNG_1B0_UA 1250
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#define BQ2515X_ICHG_RNG_1B1_UA 2500
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#define BQ2515X_VLOWV_SEL_1B0_UV 3000000
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#define BQ2515X_VLOWV_SEL_1B1_UV 2800000
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#define BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA 18750
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#define BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA 37500
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#define BQ2515X_TWAKE2_MIN_US 1700000
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#define BQ2515X_TWAKE2_MAX_US 2300000
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#define BQ2515X_ILIM_150MA 0x2
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#define BQ2515X_ILIM_MASK 0x7
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#define BQ2515X_ILIM_MIN 50000
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#define BQ2515X_ILIM_MAX 600000
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#define BQ2515X_HEALTH_MASK 0xf
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#define BQ2515X_ICHGRNG_MASK 0x80
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#define BQ2515X_STAT0_MASK 0x0f
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#define BQ2515X_STAT1_MASK 0x1f
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#define BQ2515X_PRECHARGE_MASK 0x1f
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#define BQ2515X_TS_HOT_STAT BIT(0)
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#define BQ2515X_TS_WARM_STAT BIT(1)
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#define BQ2515X_TS_COOL_STAT BIT(2)
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#define BQ2515X_TS_COLD_STAT BIT(3)
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#define BQ2515X_SAFETY_TIMER_EXP BIT(5)
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#define BQ2515X_EN_VBAT_READ BIT(3)
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#define BQ2515X_EN_ICHG_READ BIT(5)
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#define BQ2515X_VIN_GOOD BIT(0)
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#define BQ2515X_CHRG_DONE BIT(5)
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#define BQ2515X_CV_CHRG_MODE BIT(6)
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#define BQ2515X_VIN_OVP_FAULT_STAT BIT(7)
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#define BQ2515X_WATCHDOG_DISABLE BIT(4)
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#define BQ2515X_ICHARGE_RANGE BIT(7)
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#define BQ2515X_VLOWV_SEL BIT(5)
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#define BQ2515X_CHARGER_DISABLE BIT(0)
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#define BQ2515X_HWRESET_14S_WD BIT(1)
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static const int bq2515x_ilim_lvl_values[] = {
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50000, 100000, 150000, 200000, 300000, 400000, 500000, 600000
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};
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/**
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* struct bq2515x_init_data -
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* @ilim: input current limit
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* @ichg: fast charge current
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* @vbatreg: battery regulation voltage
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* @iprechg: precharge current
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*/
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struct bq2515x_init_data {
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int ilim;
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int ichg;
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int vbatreg;
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int iprechg;
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};
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enum bq2515x_id {
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BQ25150,
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BQ25155,
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};
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/**
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* struct bq2515x_device -
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* @mains: mains properties
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* @battery: battery properties
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* @regmap: register map structure
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* @dev: device structure
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*
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* @reset_gpio: manual reset (MR) pin
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* @powerdown_gpio: low power mode pin
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* @ac_detect_gpio: power good (PG) pin
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* @ce_gpio: charge enable (CE) pin
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*
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* @model_name: string value describing device model
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* @device_id: value of device_id
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* @mains_online: boolean value indicating power supply online
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*
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* @init_data: charger initialization data structure
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*/
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struct bq2515x_device {
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struct power_supply *mains;
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struct power_supply *battery;
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struct regmap *regmap;
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struct device *dev;
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struct gpio_desc *reset_gpio;
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struct gpio_desc *powerdown_gpio;
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struct gpio_desc *ac_detect_gpio;
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struct gpio_desc *ce_gpio;
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char model_name[I2C_NAME_SIZE];
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int device_id;
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bool mains_online;
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struct bq2515x_init_data init_data;
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};
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static const struct reg_default bq25150_reg_defaults[] = {
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{BQ2515X_FLAG0, 0x0},
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{BQ2515X_FLAG1, 0x0},
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{BQ2515X_FLAG2, 0x0},
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{BQ2515X_FLAG3, 0x0},
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{BQ2515X_MASK0, 0x0},
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{BQ2515X_MASK1, 0x0},
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{BQ2515X_MASK2, 0x71},
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{BQ2515X_MASK3, 0x0},
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{BQ2515X_VBAT_CTRL, 0x3C},
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{BQ2515X_ICHG_CTRL, 0x8},
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{BQ2515X_PCHRGCTRL, 0x2},
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{BQ2515X_TERMCTRL, 0x14},
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{BQ2515X_BUVLO, 0x0},
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{BQ2515X_CHARGERCTRL0, 0x82},
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{BQ2515X_CHARGERCTRL1, 0x42},
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{BQ2515X_ILIMCTRL, 0x1},
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{BQ2515X_LDOCTRL, 0xB0},
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{BQ2515X_MRCTRL, 0x2A},
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{BQ2515X_ICCTRL0, 0x10},
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{BQ2515X_ICCTRL1, 0x0},
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{BQ2515X_ICCTRL2, 0x0},
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{BQ2515X_ADCCTRL0, 0x2},
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{BQ2515X_ADCCTRL1, 0x40},
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{BQ2515X_ADC_COMP1_M, 0x23},
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{BQ2515X_ADC_COMP1_L, 0x20},
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{BQ2515X_ADC_COMP2_M, 0x38},
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{BQ2515X_ADC_COMP2_L, 0x90},
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{BQ2515X_ADC_COMP3_M, 0x0},
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{BQ2515X_ADC_COMP3_L, 0x0},
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{BQ2515X_ADC_READ_EN, 0x0},
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{BQ2515X_TS_FASTCHGCTRL, 0x34},
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{BQ2515X_TS_COLD, 0x7C},
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{BQ2515X_TS_COOL, 0x6D},
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{BQ2515X_TS_WARM, 0x38},
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{BQ2515X_TS_HOT, 0x27},
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{BQ2515X_DEVICE_ID, 0x20},
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};
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static const struct reg_default bq25155_reg_defaults[] = {
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{BQ2515X_FLAG0, 0x0},
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{BQ2515X_FLAG1, 0x0},
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{BQ2515X_FLAG2, 0x0},
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{BQ2515X_FLAG3, 0x0},
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{BQ2515X_MASK0, 0x0},
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{BQ2515X_MASK1, 0x0},
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{BQ2515X_MASK2, 0x71},
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{BQ2515X_MASK3, 0x0},
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{BQ2515X_VBAT_CTRL, 0x3C},
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{BQ2515X_ICHG_CTRL, 0x8},
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{BQ2515X_PCHRGCTRL, 0x2},
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{BQ2515X_TERMCTRL, 0x14},
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{BQ2515X_BUVLO, 0x0},
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{BQ2515X_CHARGERCTRL0, 0x82},
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{BQ2515X_CHARGERCTRL1, 0xC2},
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{BQ2515X_ILIMCTRL, 0x6},
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{BQ2515X_LDOCTRL, 0xB0},
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{BQ2515X_MRCTRL, 0x2A},
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{BQ2515X_ICCTRL0, 0x10},
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{BQ2515X_ICCTRL1, 0x0},
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{BQ2515X_ICCTRL2, 0x40},
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{BQ2515X_ADCCTRL0, 0x2},
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{BQ2515X_ADCCTRL1, 0x40},
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{BQ2515X_ADC_COMP1_M, 0x23},
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{BQ2515X_ADC_COMP1_L, 0x20},
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{BQ2515X_ADC_COMP2_M, 0x38},
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{BQ2515X_ADC_COMP2_L, 0x90},
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{BQ2515X_ADC_COMP3_M, 0x0},
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{BQ2515X_ADC_COMP3_L, 0x0},
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{BQ2515X_ADC_READ_EN, 0x0},
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{BQ2515X_TS_FASTCHGCTRL, 0x34},
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{BQ2515X_TS_COLD, 0x7C},
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{BQ2515X_TS_COOL, 0x6D},
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{BQ2515X_TS_WARM, 0x38},
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{BQ2515X_TS_HOT, 0x27},
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{BQ2515X_DEVICE_ID, 0x35},
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};
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static int bq2515x_wake_up(struct bq2515x_device *bq2515x)
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{
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int ret;
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int val;
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/* Read the STAT register if we can read it then the device is out
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* of ship mode. If the register cannot be read then attempt to wake
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* it up and enable the ADC.
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*/
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ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
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if (ret)
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return ret;
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/* Need to toggle LP and bring device out of ship mode. The device
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* will exit the ship mode when the MR pin is held low for at least
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* t_WAKE2 as shown in section 8.3.7.1 of the datasheet.
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*/
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gpiod_set_value_cansleep(bq2515x->powerdown_gpio, 0);
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gpiod_set_value_cansleep(bq2515x->reset_gpio, 0);
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usleep_range(BQ2515X_TWAKE2_MIN_US, BQ2515X_TWAKE2_MAX_US);
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gpiod_set_value_cansleep(bq2515x->reset_gpio, 1);
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return regmap_write(bq2515x->regmap, BQ2515X_ADC_READ_EN,
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(BQ2515X_EN_VBAT_READ | BQ2515X_EN_ICHG_READ));
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}
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static int bq2515x_update_ps_status(struct bq2515x_device *bq2515x)
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{
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bool dc = false;
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unsigned int val;
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int ret;
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if (bq2515x->ac_detect_gpio)
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val = gpiod_get_value_cansleep(bq2515x->ac_detect_gpio);
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else {
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ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
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if (ret)
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return ret;
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}
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dc = val & BQ2515X_VIN_GOOD;
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ret = bq2515x->mains_online != dc;
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bq2515x->mains_online = dc;
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return ret;
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}
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static int bq2515x_disable_watchdog_timers(struct bq2515x_device *bq2515x)
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{
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int ret;
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ret = regmap_update_bits(bq2515x->regmap, BQ2515X_CHARGERCTRL0,
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BQ2515X_WATCHDOG_DISABLE, BQ2515X_WATCHDOG_DISABLE);
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if (ret)
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return ret;
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return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
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BQ2515X_HWRESET_14S_WD, 0);
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}
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static int bq2515x_get_battery_voltage_now(struct bq2515x_device *bq2515x)
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{
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int ret;
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int vbat_msb;
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int vbat_lsb;
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uint32_t vbat_measurement;
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if (!bq2515x->mains_online)
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bq2515x_wake_up(bq2515x);
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ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_M, &vbat_msb);
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if (ret)
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return ret;
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ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_L, &vbat_lsb);
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if (ret)
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return ret;
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vbat_measurement = (vbat_msb << 8) | vbat_lsb;
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return vbat_measurement * (BQ2515X_UV_FACTOR / BQ2515X_DIVISOR) *
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BQ2515X_VBAT_MULTIPLIER;
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}
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static int bq2515x_get_battery_current_now(struct bq2515x_device *bq2515x)
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{
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int ret;
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int ichg_msb;
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int ichg_lsb;
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uint32_t ichg_measurement;
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u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
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unsigned int ichg_reg_code, reg_code;
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unsigned int icharge_range = 0, pchrgctrl;
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unsigned int buvlo, vlowv_sel, vlowv = BQ2515X_VLOWV_SEL_1B0_UV;
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if (!bq2515x->mains_online)
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return -ENODATA;
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ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_M, &ichg_msb);
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if (ret)
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return ret;
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ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_L, &ichg_lsb);
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if (ret)
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return ret;
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ichg_measurement = (ichg_msb << 8) | ichg_lsb;
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ret = regmap_read(bq2515x->regmap, BQ2515X_BUVLO, &buvlo);
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if (ret)
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return ret;
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vlowv_sel = buvlo & BQ2515X_VLOWV_SEL;
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if (vlowv_sel)
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vlowv = BQ2515X_VLOWV_SEL_1B1_UV;
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if (bq2515x_get_battery_voltage_now(bq2515x) < vlowv) {
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ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL,
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&pchrgctrl);
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if (ret)
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return ret;
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reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
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} else {
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ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL,
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&ichg_reg_code);
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if (ret)
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return ret;
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reg_code = ichg_reg_code;
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}
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ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
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if (ret)
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return ret;
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icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
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if (icharge_range)
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ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
|
|
|
|
return reg_code * (ichg_multiplier * ichg_measurement /
|
|
BQ2515X_ICHG_DIVISOR);
|
|
}
|
|
|
|
static bool bq2515x_get_charge_disable(struct bq2515x_device *bq2515x)
|
|
{
|
|
int ret;
|
|
int ce_pin;
|
|
int icctrl2;
|
|
int charger_disable;
|
|
|
|
ce_pin = gpiod_get_value_cansleep(bq2515x->ce_gpio);
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_ICCTRL2, &icctrl2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
charger_disable = icctrl2 & BQ2515X_CHARGER_DISABLE;
|
|
|
|
if (charger_disable || ce_pin)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int bq2515x_set_charge_disable(struct bq2515x_device *bq2515x, int val)
|
|
{
|
|
gpiod_set_value_cansleep(bq2515x->ce_gpio, val);
|
|
|
|
return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
|
|
BQ2515X_CHARGER_DISABLE, val);
|
|
}
|
|
|
|
static int bq2515x_get_const_charge_current(struct bq2515x_device *bq2515x)
|
|
{
|
|
int ret;
|
|
u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
|
|
unsigned int ichg_reg_code;
|
|
unsigned int pchrgctrl;
|
|
unsigned int icharge_range;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL, &ichg_reg_code);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
|
|
if (ret)
|
|
return ret;
|
|
|
|
icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
|
|
|
|
if (icharge_range)
|
|
ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
|
|
|
|
return ichg_reg_code * ichg_multiplier;
|
|
}
|
|
|
|
static int bq2515x_set_const_charge_current(struct bq2515x_device *bq2515x,
|
|
int val)
|
|
{
|
|
int ret;
|
|
unsigned int ichg_reg_code;
|
|
u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
|
|
unsigned int icharge_range = 0;
|
|
|
|
if (val > BQ2515X_ICHG_MAX_UA || val < BQ2515X_ICHG_MIN_UA)
|
|
return -EINVAL;
|
|
|
|
if (val > BQ2515X_ICHG_CURR_STEP_THRESH_UA) {
|
|
ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
|
|
icharge_range = BQ2515X_ICHARGE_RANGE;
|
|
}
|
|
|
|
bq2515x_set_charge_disable(bq2515x, 1);
|
|
|
|
ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
|
|
BQ2515X_ICHARGE_RANGE, icharge_range);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ichg_reg_code = val / ichg_multiplier;
|
|
|
|
ret = regmap_write(bq2515x->regmap, BQ2515X_ICHG_CTRL, ichg_reg_code);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return bq2515x_set_charge_disable(bq2515x, 0);
|
|
}
|
|
|
|
static int bq2515x_get_precharge_current(struct bq2515x_device *bq2515x)
|
|
{
|
|
int ret;
|
|
unsigned int pchrgctrl;
|
|
unsigned int icharge_range;
|
|
u16 precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
|
|
unsigned int precharge_reg_code;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
|
|
if (ret)
|
|
return ret;
|
|
|
|
icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
|
|
|
|
if (icharge_range)
|
|
precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
|
|
|
|
precharge_reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
|
|
|
|
return precharge_reg_code * precharge_multiplier;
|
|
}
|
|
|
|
static int bq2515x_set_precharge_current(struct bq2515x_device *bq2515x,
|
|
int val)
|
|
{
|
|
int ret;
|
|
unsigned int pchrgctrl;
|
|
unsigned int icharge_range;
|
|
unsigned int precharge_reg_code;
|
|
unsigned int precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
|
|
unsigned int precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
|
|
if (ret)
|
|
return ret;
|
|
|
|
icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
|
|
|
|
if (icharge_range) {
|
|
precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA;
|
|
precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
|
|
} else {
|
|
precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
|
|
precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
|
|
}
|
|
if (val > precharge_max_ua || val < BQ2515X_ICHG_MIN_UA)
|
|
return -EINVAL;
|
|
|
|
precharge_reg_code = val / precharge_multiplier;
|
|
|
|
ret = bq2515x_set_charge_disable(bq2515x, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
|
|
BQ2515X_PRECHARGE_MASK, precharge_reg_code);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return bq2515x_set_charge_disable(bq2515x, 0);
|
|
}
|
|
|
|
static int bq2515x_charging_status(struct bq2515x_device *bq2515x,
|
|
union power_supply_propval *val)
|
|
{
|
|
bool status0_no_fault;
|
|
bool status1_no_fault;
|
|
bool ce_status;
|
|
bool charge_done;
|
|
unsigned int status;
|
|
int ret;
|
|
|
|
if (!bq2515x->mains_online) {
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
return 0;
|
|
}
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &status);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* The code block below is used to determine if any faults from the
|
|
* STAT0 register are disbaling charging or if the charge has completed
|
|
* according to the CHARGE_DONE_STAT bit.
|
|
*/
|
|
if (((status & BQ2515X_STAT0_MASK) == true) &
|
|
((status & BQ2515X_CHRG_DONE) == false)) {
|
|
status0_no_fault = true;
|
|
charge_done = false;
|
|
} else if (status & BQ2515X_CHRG_DONE) {
|
|
charge_done = true;
|
|
status0_no_fault = false;
|
|
} else {
|
|
status0_no_fault = false;
|
|
charge_done = false;
|
|
}
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &status);
|
|
if (ret)
|
|
return ret;
|
|
/*
|
|
* The code block below is used to determine if any faults from the
|
|
* STAT1 register are disbaling charging
|
|
*/
|
|
if ((status & BQ2515X_STAT1_MASK) == false)
|
|
status1_no_fault = true;
|
|
else
|
|
status1_no_fault = false;
|
|
|
|
ce_status = (!bq2515x_get_charge_disable(bq2515x));
|
|
|
|
/*
|
|
* If there are no faults and charging is enabled, then status is
|
|
* charging. Otherwise, if charging is complete, then status is full.
|
|
* Otherwise, if a fault exists or charging is disabled, then status is
|
|
* not charging
|
|
*/
|
|
if (status0_no_fault & status1_no_fault & ce_status)
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else if (charge_done)
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
else if (!(status0_no_fault & status1_no_fault & ce_status))
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bq2515x_get_batt_reg(struct bq2515x_device *bq2515x)
|
|
{
|
|
int vbat_reg_code;
|
|
int ret;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_VBAT_CTRL, &vbat_reg_code);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return BQ2515X_VBAT_BASE_VOLT + vbat_reg_code * BQ2515X_VBAT_STEP_UV;
|
|
}
|
|
|
|
static int bq2515x_set_batt_reg(struct bq2515x_device *bq2515x, int val)
|
|
{
|
|
int vbat_reg_code;
|
|
|
|
if (val > BQ2515X_VBAT_REG_MAX || val < BQ2515X_VBAT_REG_MIN)
|
|
return -EINVAL;
|
|
|
|
vbat_reg_code = (val - BQ2515X_VBAT_BASE_VOLT) / BQ2515X_VBAT_STEP_UV;
|
|
|
|
return regmap_write(bq2515x->regmap, BQ2515X_VBAT_CTRL, vbat_reg_code);
|
|
}
|
|
|
|
static int bq2515x_get_ilim_lvl(struct bq2515x_device *bq2515x)
|
|
{
|
|
int ret;
|
|
int ilimctrl;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &ilimctrl);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return bq2515x_ilim_lvl_values[ilimctrl & BQ2515X_ILIM_MASK];
|
|
}
|
|
|
|
static int bq2515x_set_ilim_lvl(struct bq2515x_device *bq2515x, int val)
|
|
{
|
|
int i = 0;
|
|
unsigned int array_size = ARRAY_SIZE(bq2515x_ilim_lvl_values);
|
|
|
|
for (i = array_size - 1; i > 0; i--) {
|
|
if (val >= bq2515x_ilim_lvl_values[i])
|
|
break;
|
|
}
|
|
return regmap_write(bq2515x->regmap, BQ2515X_ILIMCTRL, i);
|
|
}
|
|
|
|
static int bq2515x_power_supply_property_is_writeable(struct power_supply *psy,
|
|
enum power_supply_property prop)
|
|
{
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static int bq2515x_charger_get_health(struct bq2515x_device *bq2515x,
|
|
union power_supply_propval *val)
|
|
{
|
|
int health = POWER_SUPPLY_HEALTH_GOOD;
|
|
int ret;
|
|
unsigned int stat1;
|
|
unsigned int flag3;
|
|
|
|
if (!bq2515x->mains_online)
|
|
bq2515x_wake_up(bq2515x);
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG3, &flag3);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &stat1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (stat1 & BQ2515X_HEALTH_MASK) {
|
|
switch (stat1 & BQ2515X_HEALTH_MASK) {
|
|
case BQ2515X_TS_HOT_STAT:
|
|
health = POWER_SUPPLY_HEALTH_HOT;
|
|
break;
|
|
case BQ2515X_TS_WARM_STAT:
|
|
health = POWER_SUPPLY_HEALTH_WARM;
|
|
break;
|
|
case BQ2515X_TS_COOL_STAT:
|
|
health = POWER_SUPPLY_HEALTH_COOL;
|
|
break;
|
|
case BQ2515X_TS_COLD_STAT:
|
|
health = POWER_SUPPLY_HEALTH_COLD;
|
|
break;
|
|
default:
|
|
health = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (stat1 & BQ2515X_VIN_OVP_FAULT_STAT)
|
|
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
|
|
|
|
if (flag3 & BQ2515X_SAFETY_TIMER_EXP)
|
|
health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
|
|
|
|
val->intval = health;
|
|
return 0;
|
|
}
|
|
|
|
static int bq2515x_mains_set_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
ret = bq2515x_set_batt_reg(bq2515x, val->intval);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
ret = bq2515x_set_const_charge_current(bq2515x, val->intval);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
ret = bq2515x_set_ilim_lvl(bq2515x, val->intval);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
|
ret = bq2515x_set_precharge_current(bq2515x, val->intval);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bq2515x_mains_get_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
|
|
int ret = 0;
|
|
|
|
switch (prop) {
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
ret = bq2515x_get_const_charge_current(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
ret = bq2515x_get_batt_reg(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
|
ret = bq2515x_get_precharge_current(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = bq2515x->mains_online;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
ret = bq2515x_charger_get_health(bq2515x, val);
|
|
if (ret)
|
|
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
ret = bq2515x_get_ilim_lvl(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
|
val->strval = bq2515x->model_name;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_MANUFACTURER:
|
|
val->strval = BQ2515X_MANUFACTURER;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
ret = bq2515x_charging_status(bq2515x, val);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bq2515x_battery_get_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
ret = bq2515x_update_ps_status(bq2515x);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (prop) {
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
|
ret = bq2515x->init_data.vbatreg;
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
|
ret = bq2515x->init_data.ichg;
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
ret = bq2515x_get_battery_voltage_now(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
ret = bq2515x_get_battery_current_now(bq2515x);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const enum power_supply_property bq2515x_battery_properties[] = {
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
|
};
|
|
|
|
static const enum power_supply_property bq2515x_mains_properties[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
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|
POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
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POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
|
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};
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|
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static const struct power_supply_desc bq2515x_mains_desc = {
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.name = "bq2515x-mains",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.get_property = bq2515x_mains_get_property,
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.set_property = bq2515x_mains_set_property,
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.properties = bq2515x_mains_properties,
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.num_properties = ARRAY_SIZE(bq2515x_mains_properties),
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.property_is_writeable = bq2515x_power_supply_property_is_writeable,
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};
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|
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static const struct power_supply_desc bq2515x_battery_desc = {
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.name = "bq2515x-battery",
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.get_property = bq2515x_battery_get_property,
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.properties = bq2515x_battery_properties,
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.num_properties = ARRAY_SIZE(bq2515x_battery_properties),
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.property_is_writeable = bq2515x_power_supply_property_is_writeable,
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};
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static int bq2515x_power_supply_register(struct bq2515x_device *bq2515x,
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struct device *dev, struct power_supply_config psy_cfg)
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|
{
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bq2515x->mains = devm_power_supply_register(bq2515x->dev,
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&bq2515x_mains_desc,
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|
&psy_cfg);
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if (IS_ERR(bq2515x->mains))
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return -EINVAL;
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|
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bq2515x->battery = devm_power_supply_register(bq2515x->dev,
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&bq2515x_battery_desc,
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|
&psy_cfg);
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if (IS_ERR(bq2515x->battery))
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return -EINVAL;
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|
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return 0;
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}
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|
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static int bq2515x_hw_init(struct bq2515x_device *bq2515x)
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|
{
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int ret;
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struct power_supply_battery_info *bat_info;
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|
|
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ret = bq2515x_disable_watchdog_timers(bq2515x);
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if (ret)
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return ret;
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|
|
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if (bq2515x->init_data.ilim) {
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ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ilim);
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if (ret)
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return ret;
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}
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|
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ret = power_supply_get_battery_info(bq2515x->mains, &bat_info);
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if (ret) {
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dev_warn(bq2515x->dev, "battery info missing, default values will be applied\n");
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|
|
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bq2515x->init_data.ichg = BQ2515X_DEFAULT_ICHG_UA;
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|
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bq2515x->init_data.vbatreg = BQ2515X_DEFAULT_VBAT_REG_UV;
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|
|
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bq2515x->init_data.iprechg = BQ2515X_DEFAULT_IPRECHARGE_UA;
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|
|
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} else {
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bq2515x->init_data.ichg =
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bat_info->constant_charge_current_max_ua;
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|
|
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bq2515x->init_data.vbatreg =
|
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bat_info->constant_charge_voltage_max_uv;
|
|
|
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bq2515x->init_data.iprechg =
|
|
bat_info->precharge_current_ua;
|
|
}
|
|
|
|
ret = bq2515x_set_const_charge_current(bq2515x,
|
|
bq2515x->init_data.ichg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vbatreg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return bq2515x_set_precharge_current(bq2515x,
|
|
bq2515x->init_data.iprechg);
|
|
}
|
|
|
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static int bq2515x_read_properties(struct bq2515x_device *bq2515x)
|
|
{
|
|
int ret;
|
|
|
|
ret = device_property_read_u32(bq2515x->dev,
|
|
"input-current-limit-microamp",
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|
&bq2515x->init_data.ilim);
|
|
if (ret) {
|
|
switch (bq2515x->device_id) {
|
|
case BQ25150:
|
|
bq2515x->init_data.ilim = BQ25150_DEFAULT_ILIM_UA;
|
|
break;
|
|
case BQ25155:
|
|
bq2515x->init_data.ilim = BQ25155_DEFAULT_ILIM_UA;
|
|
break;
|
|
}
|
|
}
|
|
|
|
bq2515x->ac_detect_gpio = devm_gpiod_get_optional(bq2515x->dev,
|
|
"ac-detect", GPIOD_IN);
|
|
if (IS_ERR(bq2515x->ac_detect_gpio)) {
|
|
ret = PTR_ERR(bq2515x->ac_detect_gpio);
|
|
dev_err(bq2515x->dev, "Failed to get ac detect");
|
|
return ret;
|
|
}
|
|
|
|
bq2515x->reset_gpio = devm_gpiod_get_optional(bq2515x->dev,
|
|
"reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(bq2515x->reset_gpio)) {
|
|
ret = PTR_ERR(bq2515x->reset_gpio);
|
|
dev_err(bq2515x->dev, "Failed to get reset");
|
|
return ret;
|
|
}
|
|
|
|
bq2515x->powerdown_gpio = devm_gpiod_get_optional(bq2515x->dev,
|
|
"powerdown", GPIOD_OUT_LOW);
|
|
if (IS_ERR(bq2515x->powerdown_gpio)) {
|
|
ret = PTR_ERR(bq2515x->powerdown_gpio);
|
|
dev_err(bq2515x->dev, "Failed to get powerdown");
|
|
return ret;
|
|
}
|
|
|
|
bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev,
|
|
"charge-enable",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(bq2515x->ce_gpio)) {
|
|
ret = PTR_ERR(bq2515x->ce_gpio);
|
|
dev_err(bq2515x->dev, "Failed to get ce");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool bq2515x_volatile_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case BQ2515X_STAT0 ... BQ2515X_FLAG3:
|
|
case BQ2515X_ADC_VBAT_M ... BQ2515X_ADC_IIN_L:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config bq25150_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
|
|
.max_register = BQ2515X_DEVICE_ID,
|
|
.reg_defaults = bq25150_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(bq25150_reg_defaults),
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.volatile_reg = bq2515x_volatile_register,
|
|
};
|
|
|
|
static const struct regmap_config bq25155_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
|
|
.max_register = BQ2515X_DEVICE_ID,
|
|
.reg_defaults = bq25155_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(bq25155_reg_defaults),
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.volatile_reg = bq2515x_volatile_register,
|
|
};
|
|
|
|
static int bq2515x_probe(struct i2c_client *client)
|
|
{
|
|
const struct i2c_device_id *id = i2c_client_get_device_id(client);
|
|
struct device *dev = &client->dev;
|
|
struct bq2515x_device *bq2515x;
|
|
struct power_supply_config charger_cfg = {};
|
|
int ret;
|
|
|
|
bq2515x = devm_kzalloc(dev, sizeof(*bq2515x), GFP_KERNEL);
|
|
if (!bq2515x)
|
|
return -ENOMEM;
|
|
|
|
bq2515x->dev = dev;
|
|
|
|
strncpy(bq2515x->model_name, id->name, I2C_NAME_SIZE);
|
|
|
|
bq2515x->device_id = id->driver_data;
|
|
|
|
switch (bq2515x->device_id) {
|
|
case BQ25150:
|
|
bq2515x->regmap = devm_regmap_init_i2c(client,
|
|
&bq25150_regmap_config);
|
|
break;
|
|
case BQ25155:
|
|
bq2515x->regmap = devm_regmap_init_i2c(client,
|
|
&bq25155_regmap_config);
|
|
break;
|
|
}
|
|
|
|
if (IS_ERR(bq2515x->regmap)) {
|
|
dev_err(dev, "failed to allocate register map\n");
|
|
return PTR_ERR(bq2515x->regmap);
|
|
}
|
|
|
|
i2c_set_clientdata(client, bq2515x);
|
|
|
|
charger_cfg.drv_data = bq2515x;
|
|
charger_cfg.of_node = dev->of_node;
|
|
|
|
ret = bq2515x_read_properties(bq2515x);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to read device tree properties %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = bq2515x_power_supply_register(bq2515x, dev, charger_cfg);
|
|
if (ret) {
|
|
dev_err(dev, "failed to register power supply\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = bq2515x_hw_init(bq2515x);
|
|
if (ret) {
|
|
dev_err(dev, "Cannot initialize the chip\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id bq2515x_i2c_ids[] = {
|
|
{ "bq25150", BQ25150, },
|
|
{ "bq25155", BQ25155, },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, bq2515x_i2c_ids);
|
|
|
|
static const struct of_device_id bq2515x_of_match[] = {
|
|
{ .compatible = "ti,bq25150", },
|
|
{ .compatible = "ti,bq25155", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bq2515x_of_match);
|
|
|
|
static struct i2c_driver bq2515x_driver = {
|
|
.driver = {
|
|
.name = "bq2515x-charger",
|
|
.of_match_table = bq2515x_of_match,
|
|
},
|
|
.probe_new = bq2515x_probe,
|
|
.id_table = bq2515x_i2c_ids,
|
|
};
|
|
module_i2c_driver(bq2515x_driver);
|
|
|
|
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|
|
MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
|
|
MODULE_DESCRIPTION("BQ2515X charger driver");
|
|
MODULE_LICENSE("GPL v2");
|