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OpenCloudOS-Kernel/drivers/power/supply/bq27xxx_battery.c

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/*
* BQ27xxx battery driver
*
* Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
* Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
* Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
* Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
* Copyright (C) 2017 Liam Breck <kernel@networkimprov.net>
*
* Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Datasheets:
* http://www.ti.com/product/bq27000
* http://www.ti.com/product/bq27200
* http://www.ti.com/product/bq27010
* http://www.ti.com/product/bq27210
* http://www.ti.com/product/bq27500
* http://www.ti.com/product/bq27510-g1
* http://www.ti.com/product/bq27510-g2
* http://www.ti.com/product/bq27510-g3
* http://www.ti.com/product/bq27520-g4
* http://www.ti.com/product/bq27520-g1
* http://www.ti.com/product/bq27520-g2
* http://www.ti.com/product/bq27520-g3
* http://www.ti.com/product/bq27520-g4
* http://www.ti.com/product/bq27530-g1
* http://www.ti.com/product/bq27531-g1
* http://www.ti.com/product/bq27541-g1
* http://www.ti.com/product/bq27542-g1
* http://www.ti.com/product/bq27546-g1
* http://www.ti.com/product/bq27742-g1
* http://www.ti.com/product/bq27545-g1
* http://www.ti.com/product/bq27421-g1
* http://www.ti.com/product/bq27425-g1
* http://www.ti.com/product/bq27411-g1
* http://www.ti.com/product/bq27621-g1
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/power/bq27xxx_battery.h>
#define DRIVER_VERSION "1.2.0"
#define BQ27XXX_MANUFACTURER "Texas Instruments"
/* BQ27XXX Flags */
#define BQ27XXX_FLAG_DSC BIT(0)
#define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
#define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
#define BQ27XXX_FLAG_CFGUP BIT(4)
#define BQ27XXX_FLAG_FC BIT(9)
#define BQ27XXX_FLAG_OTD BIT(14)
#define BQ27XXX_FLAG_OTC BIT(15)
#define BQ27XXX_FLAG_UT BIT(14)
#define BQ27XXX_FLAG_OT BIT(15)
/* BQ27000 has different layout for Flags register */
#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
#define BQ27000_FLAG_FC BIT(5)
#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
/* control register params */
#define BQ27XXX_SEALED 0x20
#define BQ27XXX_SET_CFGUPDATE 0x13
#define BQ27XXX_SOFT_RESET 0x42
#define BQ27XXX_RESET 0x41
#define BQ27XXX_RS (20) /* Resistor sense mOhm */
#define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
#define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
#define INVALID_REG_ADDR 0xff
/*
* bq27xxx_reg_index - Register names
*
* These are indexes into a device's register mapping array.
*/
enum bq27xxx_reg_index {
BQ27XXX_REG_CTRL = 0, /* Control */
BQ27XXX_REG_TEMP, /* Temperature */
BQ27XXX_REG_INT_TEMP, /* Internal Temperature */
BQ27XXX_REG_VOLT, /* Voltage */
BQ27XXX_REG_AI, /* Average Current */
BQ27XXX_REG_FLAGS, /* Flags */
BQ27XXX_REG_TTE, /* Time-to-Empty */
BQ27XXX_REG_TTF, /* Time-to-Full */
BQ27XXX_REG_TTES, /* Time-to-Empty Standby */
BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */
BQ27XXX_REG_NAC, /* Nominal Available Capacity */
BQ27XXX_REG_FCC, /* Full Charge Capacity */
BQ27XXX_REG_CYCT, /* Cycle Count */
BQ27XXX_REG_AE, /* Available Energy */
BQ27XXX_REG_SOC, /* State-of-Charge */
BQ27XXX_REG_DCAP, /* Design Capacity */
BQ27XXX_REG_AP, /* Average Power */
BQ27XXX_DM_CTRL, /* Block Data Control */
BQ27XXX_DM_CLASS, /* Data Class */
BQ27XXX_DM_BLOCK, /* Data Block */
BQ27XXX_DM_DATA, /* Block Data */
BQ27XXX_DM_CKSUM, /* Block Data Checksum */
BQ27XXX_REG_MAX, /* sentinel */
};
#define BQ27XXX_DM_REG_ROWS \
[BQ27XXX_DM_CTRL] = 0x61, \
[BQ27XXX_DM_CLASS] = 0x3e, \
[BQ27XXX_DM_BLOCK] = 0x3f, \
[BQ27XXX_DM_DATA] = 0x40, \
[BQ27XXX_DM_CKSUM] = 0x60
/* Register mappings */
static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
[BQ27000] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = 0x24,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
[BQ27010] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x0b,
[BQ27XXX_REG_DCAP] = 0x76,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
[BQ2750X] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1a,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
[BQ2751X] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1a,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x1e,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = 0x2e,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
[BQ27500] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27510G1] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27510G2] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27510G3] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1a,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x1e,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = 0x2e,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
[BQ27520G1] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27520G2] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x36,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = 0x18,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27520G3] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x36,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = 0x26,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = 0x22,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27520G4] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = 0x1c,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x1e,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x20,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
[BQ27530] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x32,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27541] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27545] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
[BQ27XXX_REG_INT_TEMP] = 0x28,
[BQ27XXX_REG_VOLT] = 0x08,
[BQ27XXX_REG_AI] = 0x14,
[BQ27XXX_REG_FLAGS] = 0x0a,
[BQ27XXX_REG_TTE] = 0x16,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x0c,
[BQ27XXX_REG_FCC] = 0x12,
[BQ27XXX_REG_CYCT] = 0x2a,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x2c,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = 0x24,
BQ27XXX_DM_REG_ROWS,
},
[BQ27421] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x02,
[BQ27XXX_REG_INT_TEMP] = 0x1e,
[BQ27XXX_REG_VOLT] = 0x04,
[BQ27XXX_REG_AI] = 0x10,
[BQ27XXX_REG_FLAGS] = 0x06,
[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = 0x08,
[BQ27XXX_REG_FCC] = 0x0e,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = 0x1c,
[BQ27XXX_REG_DCAP] = 0x3c,
[BQ27XXX_REG_AP] = 0x18,
BQ27XXX_DM_REG_ROWS,
},
};
static enum power_supply_property bq27000_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27010_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq2750x_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq2751x_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27500_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27510g1_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27510g2_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27510g3_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g1_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g2_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g3_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27520g4_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27530_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27541_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27545_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_POWER_AVG,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27421_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_MANUFACTURER,
};
#define BQ27XXX_PROP(_id, _prop) \
[_id] = { \
.props = _prop, \
.size = ARRAY_SIZE(_prop), \
}
static struct {
enum power_supply_property *props;
size_t size;
} bq27xxx_battery_props[] = {
BQ27XXX_PROP(BQ27000, bq27000_battery_props),
BQ27XXX_PROP(BQ27010, bq27010_battery_props),
BQ27XXX_PROP(BQ2750X, bq2750x_battery_props),
BQ27XXX_PROP(BQ2751X, bq2751x_battery_props),
BQ27XXX_PROP(BQ27500, bq27500_battery_props),
BQ27XXX_PROP(BQ27510G1, bq27510g1_battery_props),
BQ27XXX_PROP(BQ27510G2, bq27510g2_battery_props),
BQ27XXX_PROP(BQ27510G3, bq27510g3_battery_props),
BQ27XXX_PROP(BQ27520G1, bq27520g1_battery_props),
BQ27XXX_PROP(BQ27520G2, bq27520g2_battery_props),
BQ27XXX_PROP(BQ27520G3, bq27520g3_battery_props),
BQ27XXX_PROP(BQ27520G4, bq27520g4_battery_props),
BQ27XXX_PROP(BQ27530, bq27530_battery_props),
BQ27XXX_PROP(BQ27541, bq27541_battery_props),
BQ27XXX_PROP(BQ27545, bq27545_battery_props),
BQ27XXX_PROP(BQ27421, bq27421_battery_props),
};
static DEFINE_MUTEX(bq27xxx_list_lock);
static LIST_HEAD(bq27xxx_battery_devices);
#define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
#define BQ27XXX_DM_SZ 32
struct bq27xxx_dm_reg {
u8 subclass_id;
u8 offset;
u8 bytes;
u16 min, max;
};
/**
* struct bq27xxx_dm_buf - chip data memory buffer
* @class: data memory subclass_id
* @block: data memory block number
* @data: data from/for the block
* @has_data: true if data has been filled by read
* @dirty: true if data has changed since last read/write
*
* Encapsulates info required to manage chip data memory blocks.
*/
struct bq27xxx_dm_buf {
u8 class;
u8 block;
u8 data[BQ27XXX_DM_SZ];
bool has_data, dirty;
};
#define BQ27XXX_DM_BUF(di, i) { \
.class = (di)->dm_regs[i].subclass_id, \
.block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
}
static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
struct bq27xxx_dm_reg *reg)
{
if (buf->class == reg->subclass_id &&
buf->block == reg->offset / BQ27XXX_DM_SZ)
return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
return NULL;
}
enum bq27xxx_dm_reg_id {
BQ27XXX_DM_DESIGN_CAPACITY = 0,
BQ27XXX_DM_DESIGN_ENERGY,
BQ27XXX_DM_TERMINATE_VOLTAGE,
};
static const char * const bq27xxx_dm_reg_name[] = {
[BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
[BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
[BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
};
static bool bq27xxx_dt_to_nvm = true;
module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
"Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
"Users must set this =0 when installing a different type of battery!\n"
"Default is =1."
#ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
"\nSetting this affects future kernel updates, not the current configuration."
#endif
);
static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
{
struct bq27xxx_device_info *di;
unsigned int prev_val = *(unsigned int *) kp->arg;
int ret;
ret = param_set_uint(val, kp);
if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
return ret;
mutex_lock(&bq27xxx_list_lock);
list_for_each_entry(di, &bq27xxx_battery_devices, list) {
cancel_delayed_work_sync(&di->work);
schedule_delayed_work(&di->work, 0);
}
mutex_unlock(&bq27xxx_list_lock);
return ret;
}
static const struct kernel_param_ops param_ops_poll_interval = {
.get = param_get_uint,
.set = poll_interval_param_set,
};
static unsigned int poll_interval = 360;
module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
MODULE_PARM_DESC(poll_interval,
"battery poll interval in seconds - 0 disables polling");
/*
* Common code for BQ27xxx devices
*/
static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
bool single)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
ret = di->bus.read(di, di->regs[reg_index], single);
if (ret < 0)
dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
u16 value, bool single)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.write)
return -EPERM;
ret = di->bus.write(di, di->regs[reg_index], value, single);
if (ret < 0)
dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
u8 *data, int len)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.read_bulk)
return -EPERM;
ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
if (ret < 0)
dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
u8 *data, int len)
{
int ret;
if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
return -EINVAL;
if (!di->bus.write_bulk)
return -EPERM;
ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
if (ret < 0)
dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
di->regs[reg_index], reg_index);
return ret;
}
static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
{
int ret;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
if (ret < 0) {
dev_err(di->dev, "bus error on seal: %d\n", ret);
return ret;
}
return 0;
}
static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
{
int ret;
if (di->unseal_key == 0) {
dev_err(di->dev, "unseal failed due to missing key\n");
return -EINVAL;
}
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
if (ret < 0)
goto out;
return 0;
out:
dev_err(di->dev, "bus error on unseal: %d\n", ret);
return ret;
}
static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
{
u16 sum = 0;
int i;
for (i = 0; i < BQ27XXX_DM_SZ; i++)
sum += buf->data[i];
sum &= 0xff;
return 0xff - sum;
}
static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf)
{
int ret;
buf->has_data = false;
ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
if (ret < 0)
goto out;
BQ27XXX_MSLEEP(1);
ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
if (ret < 0)
goto out;
ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
if (ret < 0)
goto out;
if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
ret = -EINVAL;
goto out;
}
buf->has_data = true;
buf->dirty = false;
return 0;
out:
dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
return ret;
}
static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf,
enum bq27xxx_dm_reg_id reg_id,
unsigned int val)
{
struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
const char *str = bq27xxx_dm_reg_name[reg_id];
u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
if (prev == NULL) {
dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
return;
}
if (reg->bytes != 2) {
dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
return;
}
if (!buf->has_data)
return;
if (be16_to_cpup(prev) == val) {
dev_info(di->dev, "%s has %u\n", str, val);
return;
}
#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
if (!di->ram_chip && !bq27xxx_dt_to_nvm) {
#else
if (!di->ram_chip) {
#endif
/* devicetree and NVM differ; defer to NVM */
dev_warn(di->dev, "%s has %u; update to %u disallowed "
#ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
"by dt_monitored_battery_updates_nvm=0"
#else
"for flash/NVM data memory"
#endif
"\n", str, be16_to_cpup(prev), val);
return;
}
dev_info(di->dev, "update %s to %u\n", str, val);
*prev = cpu_to_be16(val);
buf->dirty = true;
}
static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
{
const int limit = 100;
u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
int ret, try = limit;
ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
if (ret < 0)
return ret;
do {
BQ27XXX_MSLEEP(25);
ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
if (ret < 0)
return ret;
} while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
if (!try) {
dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
return -EINVAL;
}
if (limit - try > 3)
dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
return 0;
}
static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
{
int ret = bq27xxx_battery_cfgupdate_priv(di, true);
if (ret < 0 && ret != -EINVAL)
dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
return ret;
}
static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
{
int ret = bq27xxx_battery_cfgupdate_priv(di, false);
if (ret < 0 && ret != -EINVAL)
dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
return ret;
}
static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
struct bq27xxx_dm_buf *buf)
{
bool cfgup = di->chip == BQ27421; /* assume related chips need cfgupdate */
int ret;
if (!buf->dirty)
return 0;
if (cfgup) {
ret = bq27xxx_battery_set_cfgupdate(di);
if (ret < 0)
return ret;
}
ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
if (ret < 0)
goto out;
BQ27XXX_MSLEEP(1);
ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
if (ret < 0)
goto out;
ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
bq27xxx_battery_checksum_dm_block(buf), true);
if (ret < 0)
goto out;
/* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
* corruption on the '425 chip (and perhaps others), which can damage
* the chip.
*/
if (cfgup) {
BQ27XXX_MSLEEP(1);
ret = bq27xxx_battery_soft_reset(di);
if (ret < 0)
return ret;
} else {
BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
}
buf->dirty = false;
return 0;
out:
if (cfgup)
bq27xxx_battery_soft_reset(di);
dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
return ret;
}
static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
struct power_supply_battery_info *info)
{
struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
bool updated;
if (bq27xxx_battery_unseal(di) < 0)
return;
if (info->charge_full_design_uah != -EINVAL &&
info->energy_full_design_uwh != -EINVAL) {
bq27xxx_battery_read_dm_block(di, &bd);
/* assume design energy & capacity are in same block */
bq27xxx_battery_update_dm_block(di, &bd,
BQ27XXX_DM_DESIGN_CAPACITY,
info->charge_full_design_uah / 1000);
bq27xxx_battery_update_dm_block(di, &bd,
BQ27XXX_DM_DESIGN_ENERGY,
info->energy_full_design_uwh / 1000);
}
if (info->voltage_min_design_uv != -EINVAL) {
bool same = bd.class == bt.class && bd.block == bt.block;
if (!same)
bq27xxx_battery_read_dm_block(di, &bt);
bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
BQ27XXX_DM_TERMINATE_VOLTAGE,
info->voltage_min_design_uv / 1000);
}
updated = bd.dirty || bt.dirty;
bq27xxx_battery_write_dm_block(di, &bd);
bq27xxx_battery_write_dm_block(di, &bt);
bq27xxx_battery_seal(di);
if (updated && di->chip != BQ27421) { /* not a cfgupdate chip, so reset */
bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
BQ27XXX_MSLEEP(300); /* reset time is not documented */
}
/* assume bq27xxx_battery_update() is called hereafter */
}
static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
{
struct power_supply_battery_info info = {};
unsigned int min, max;
if (power_supply_get_battery_info(di->bat, &info) < 0)
return;
if (!di->dm_regs) {
dev_warn(di->dev, "data memory update not supported for chip\n");
return;
}
if (info.energy_full_design_uwh != info.charge_full_design_uah) {
if (info.energy_full_design_uwh == -EINVAL)
dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
else if (info.charge_full_design_uah == -EINVAL)
dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
}
/* assume min == 0 */
max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
if (info.energy_full_design_uwh > max * 1000) {
dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
info.energy_full_design_uwh);
info.energy_full_design_uwh = -EINVAL;
}
/* assume min == 0 */
max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
if (info.charge_full_design_uah > max * 1000) {
dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
info.charge_full_design_uah);
info.charge_full_design_uah = -EINVAL;
}
min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
if ((info.voltage_min_design_uv < min * 1000 ||
info.voltage_min_design_uv > max * 1000) &&
info.voltage_min_design_uv != -EINVAL) {
dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
info.voltage_min_design_uv);
info.voltage_min_design_uv = -EINVAL;
}
if ((info.energy_full_design_uwh != -EINVAL &&
info.charge_full_design_uah != -EINVAL) ||
info.voltage_min_design_uv != -EINVAL)
bq27xxx_battery_set_config(di, &info);
}
/*
* Return the battery State-of-Charge
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
{
int soc;
if (di->chip == BQ27000 || di->chip == BQ27010)
soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
else
soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
if (soc < 0)
dev_dbg(di->dev, "error reading State-of-Charge\n");
return soc;
}
/*
* Return a battery charge value in µAh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
{
int charge;
charge = bq27xxx_read(di, reg, false);
if (charge < 0) {
dev_dbg(di->dev, "error reading charge register %02x: %d\n",
reg, charge);
return charge;
}
if (di->chip == BQ27000 || di->chip == BQ27010)
charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
else
charge *= 1000;
return charge;
}
/*
* Return the battery Nominal available capacity in µAh
* Or < 0 if something fails.
*/
static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
{
int flags;
if (di->chip == BQ27000 || di->chip == BQ27010) {
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
if (flags >= 0 && (flags & BQ27000_FLAG_CI))
return -ENODATA;
}
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
}
/*
* Return the battery Full Charge Capacity in µAh
* Or < 0 if something fails.
*/
static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
{
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
}
/*
* Return the Design Capacity in µAh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
{
int dcap;
if (di->chip == BQ27000 || di->chip == BQ27010)
dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
else
dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
if (dcap < 0) {
dev_dbg(di->dev, "error reading initial last measured discharge\n");
return dcap;
}
if (di->chip == BQ27000 || di->chip == BQ27010)
dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
else
dcap *= 1000;
return dcap;
}
/*
* Return the battery Available energy in µWh
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
{
int ae;
ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
if (ae < 0) {
dev_dbg(di->dev, "error reading available energy\n");
return ae;
}
if (di->chip == BQ27000 || di->chip == BQ27010)
ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
else
ae *= 1000;
return ae;
}
/*
* Return the battery temperature in tenths of degree Kelvin
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
{
int temp;
temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
if (temp < 0) {
dev_err(di->dev, "error reading temperature\n");
return temp;
}
if (di->chip == BQ27000 || di->chip == BQ27010)
temp = 5 * temp / 2;
return temp;
}
/*
* Return the battery Cycle count total
* Or < 0 if something fails.
*/
static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
{
int cyct;
cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
if (cyct < 0)
dev_err(di->dev, "error reading cycle count total\n");
return cyct;
}
/*
* Read a time register.
* Return < 0 if something fails.
*/
static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
{
int tval;
tval = bq27xxx_read(di, reg, false);
if (tval < 0) {
dev_dbg(di->dev, "error reading time register %02x: %d\n",
reg, tval);
return tval;
}
if (tval == 65535)
return -ENODATA;
return tval * 60;
}
/*
* Read an average power register.
* Return < 0 if something fails.
*/
static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
{
int tval;
tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
if (tval < 0) {
dev_err(di->dev, "error reading average power register %02x: %d\n",
BQ27XXX_REG_AP, tval);
return tval;
}
if (di->chip == BQ27000 || di->chip == BQ27010)
return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
else
return tval;
}
/*
* Returns true if a battery over temperature condition is detected
*/
static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
{
switch (di->chip) {
case BQ2750X:
case BQ2751X:
case BQ27500:
case BQ27510G1:
case BQ27510G2:
case BQ27510G3:
case BQ27520G1:
case BQ27520G2:
case BQ27520G3:
case BQ27520G4:
case BQ27541:
case BQ27545:
return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
case BQ27530:
case BQ27421:
return flags & BQ27XXX_FLAG_OT;
default:
return false;
}
}
/*
* Returns true if a battery under temperature condition is detected
*/
static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
{
if (di->chip == BQ27530 || di->chip == BQ27421)
return flags & BQ27XXX_FLAG_UT;
return false;
}
/*
* Returns true if a low state of charge condition is detected
*/
static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
{
if (di->chip == BQ27000 || di->chip == BQ27010)
return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
else
return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
}
/*
* Read flag register.
* Return < 0 if something fails.
*/
static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
{
int flags;
bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
if (flags < 0) {
dev_err(di->dev, "error reading flag register:%d\n", flags);
return flags;
}
/* Unlikely but important to return first */
if (unlikely(bq27xxx_battery_overtemp(di, flags)))
return POWER_SUPPLY_HEALTH_OVERHEAT;
if (unlikely(bq27xxx_battery_undertemp(di, flags)))
return POWER_SUPPLY_HEALTH_COLD;
if (unlikely(bq27xxx_battery_dead(di, flags)))
return POWER_SUPPLY_HEALTH_DEAD;
return POWER_SUPPLY_HEALTH_GOOD;
}
void bq27xxx_battery_update(struct bq27xxx_device_info *di)
{
struct bq27xxx_reg_cache cache = {0, };
bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
if ((cache.flags & 0xff) == 0xff)
cache.flags = -1; /* read error */
if (cache.flags >= 0) {
cache.temperature = bq27xxx_battery_read_temperature(di);
if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
cache.capacity = -ENODATA;
cache.energy = -ENODATA;
cache.time_to_empty = -ENODATA;
cache.time_to_empty_avg = -ENODATA;
cache.time_to_full = -ENODATA;
cache.charge_full = -ENODATA;
cache.health = -ENODATA;
} else {
if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
cache.charge_full = bq27xxx_battery_read_fcc(di);
cache.capacity = bq27xxx_battery_read_soc(di);
if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
cache.energy = bq27xxx_battery_read_energy(di);
cache.health = bq27xxx_battery_read_health(di);
}
if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
cache.cycle_count = bq27xxx_battery_read_cyct(di);
if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
/* We only have to read charge design full once */
if (di->charge_design_full <= 0)
di->charge_design_full = bq27xxx_battery_read_dcap(di);
}
if (di->cache.capacity != cache.capacity)
power_supply_changed(di->bat);
if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
di->cache = cache;
di->last_update = jiffies;
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
static void bq27xxx_battery_poll(struct work_struct *work)
{
struct bq27xxx_device_info *di =
container_of(work, struct bq27xxx_device_info,
work.work);
bq27xxx_battery_update(di);
if (poll_interval > 0)
schedule_delayed_work(&di->work, poll_interval * HZ);
}
/*
* Return the battery average current in µA
* Note that current can be negative signed as well
* Or 0 if something fails.
*/
static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int curr;
int flags;
curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
if (curr < 0) {
dev_err(di->dev, "error reading current\n");
return curr;
}
if (di->chip == BQ27000 || di->chip == BQ27010) {
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
if (flags & BQ27000_FLAG_CHGS) {
dev_dbg(di->dev, "negative current!\n");
curr = -curr;
}
val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
} else {
/* Other gauges return signed value */
val->intval = (int)((s16)curr) * 1000;
}
return 0;
}
static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int status;
if (di->chip == BQ27000 || di->chip == BQ27010) {
if (di->cache.flags & BQ27000_FLAG_FC)
status = POWER_SUPPLY_STATUS_FULL;
else if (di->cache.flags & BQ27000_FLAG_CHGS)
status = POWER_SUPPLY_STATUS_CHARGING;
else if (power_supply_am_i_supplied(di->bat))
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
else
status = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
if (di->cache.flags & BQ27XXX_FLAG_FC)
status = POWER_SUPPLY_STATUS_FULL;
else if (di->cache.flags & BQ27XXX_FLAG_DSC)
status = POWER_SUPPLY_STATUS_DISCHARGING;
else
status = POWER_SUPPLY_STATUS_CHARGING;
}
val->intval = status;
return 0;
}
static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int level;
if (di->chip == BQ27000 || di->chip == BQ27010) {
if (di->cache.flags & BQ27000_FLAG_FC)
level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (di->cache.flags & BQ27000_FLAG_EDV1)
level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else if (di->cache.flags & BQ27000_FLAG_EDVF)
level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else
level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
} else {
if (di->cache.flags & BQ27XXX_FLAG_FC)
level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else
level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
}
val->intval = level;
return 0;
}
/*
* Return the battery Voltage in millivolts
* Or < 0 if something fails.
*/
static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
union power_supply_propval *val)
{
int volt;
volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
if (volt < 0) {
dev_err(di->dev, "error reading voltage\n");
return volt;
}
val->intval = volt * 1000;
return 0;
}
static int bq27xxx_simple_value(int value,
union power_supply_propval *val)
{
if (value < 0)
return value;
val->intval = value;
return 0;
}
static int bq27xxx_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
mutex_lock(&di->lock);
if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
cancel_delayed_work_sync(&di->work);
bq27xxx_battery_poll(&di->work.work);
}
mutex_unlock(&di->lock);
if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = bq27xxx_battery_status(di, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = bq27xxx_battery_voltage(di, val);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = di->cache.flags < 0 ? 0 : 1;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = bq27xxx_battery_current(di, val);
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = bq27xxx_simple_value(di->cache.capacity, val);
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
ret = bq27xxx_battery_capacity_level(di, val);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = bq27xxx_simple_value(di->cache.temperature, val);
if (ret == 0)
val->intval -= 2731; /* convert decidegree k to c */
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
ret = bq27xxx_simple_value(di->cache.time_to_full, val);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
ret = bq27xxx_simple_value(di->cache.charge_full, val);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = bq27xxx_simple_value(di->charge_design_full, val);
break;
/*
* TODO: Implement these to make registers set from
* power_supply_battery_info visible in sysfs.
*/
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
return -EINVAL;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
ret = bq27xxx_simple_value(di->cache.cycle_count, val);
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
ret = bq27xxx_simple_value(di->cache.energy, val);
break;
case POWER_SUPPLY_PROP_POWER_AVG:
ret = bq27xxx_simple_value(di->cache.power_avg, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq27xxx_simple_value(di->cache.health, val);
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ27XXX_MANUFACTURER;
break;
default:
return -EINVAL;
}
return ret;
}
static void bq27xxx_external_power_changed(struct power_supply *psy)
{
struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
cancel_delayed_work_sync(&di->work);
schedule_delayed_work(&di->work, 0);
}
int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
{
struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = {
.of_node = di->dev->of_node,
.drv_data = di,
};
INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
mutex_init(&di->lock);
di->regs = bq27xxx_regs[di->chip];
psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
if (!psy_desc)
return -ENOMEM;
psy_desc->name = di->name;
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
psy_desc->properties = bq27xxx_battery_props[di->chip].props;
psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
psy_desc->get_property = bq27xxx_battery_get_property;
psy_desc->external_power_changed = bq27xxx_external_power_changed;
di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
if (IS_ERR(di->bat)) {
dev_err(di->dev, "failed to register battery\n");
return PTR_ERR(di->bat);
}
dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
bq27xxx_battery_settings(di);
bq27xxx_battery_update(di);
mutex_lock(&bq27xxx_list_lock);
list_add(&di->list, &bq27xxx_battery_devices);
mutex_unlock(&bq27xxx_list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
{
/*
* power_supply_unregister call bq27xxx_battery_get_property which
* call bq27xxx_battery_poll.
* Make sure that bq27xxx_battery_poll will not call
* schedule_delayed_work again after unregister (which cause OOPS).
*/
poll_interval = 0;
cancel_delayed_work_sync(&di->work);
power_supply_unregister(di->bat);
mutex_lock(&bq27xxx_list_lock);
list_del(&di->list);
mutex_unlock(&bq27xxx_list_lock);
mutex_destroy(&di->lock);
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg,
bool single)
{
struct device *dev = di->dev;
struct bq27xxx_platform_data *pdata = dev->platform_data;
unsigned int timeout = 3;
int upper, lower;
int temp;
if (!single) {
/* Make sure the value has not changed in between reading the
* lower and the upper part */
upper = pdata->read(dev, reg + 1);
do {
temp = upper;
if (upper < 0)
return upper;
lower = pdata->read(dev, reg);
if (lower < 0)
return lower;
upper = pdata->read(dev, reg + 1);
} while (temp != upper && --timeout);
if (timeout == 0)
return -EIO;
return (upper << 8) | lower;
}
return pdata->read(dev, reg);
}
static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
{
struct bq27xxx_device_info *di;
struct bq27xxx_platform_data *pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform_data supplied\n");
return -EINVAL;
}
if (!pdata->read) {
dev_err(&pdev->dev, "no hdq read callback supplied\n");
return -EINVAL;
}
if (!pdata->chip) {
dev_err(&pdev->dev, "no device supplied\n");
return -EINVAL;
}
di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
if (!di)
return -ENOMEM;
platform_set_drvdata(pdev, di);
di->dev = &pdev->dev;
di->chip = pdata->chip;
di->name = pdata->name ?: dev_name(&pdev->dev);
di->bus.read = bq27xxx_battery_platform_read;
return bq27xxx_battery_setup(di);
}
static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
{
struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
bq27xxx_battery_teardown(di);
return 0;
}
static const struct platform_device_id bq27xxx_battery_platform_id_table[] = {
{ "bq27000-battery", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table);
#ifdef CONFIG_OF
static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = {
{ .compatible = "ti,bq27000" },
{},
};
MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table);
#endif
static struct platform_driver bq27xxx_battery_platform_driver = {
.probe = bq27xxx_battery_platform_probe,
.remove = bq27xxx_battery_platform_remove,
.driver = {
.name = "bq27000-battery",
.of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table),
},
.id_table = bq27xxx_battery_platform_id_table,
};
module_platform_driver(bq27xxx_battery_platform_driver);
MODULE_ALIAS("platform:bq27000-battery");
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
MODULE_LICENSE("GPL");
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