| /* |
| * 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> |
| * |
| * 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_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 */ |
| |
| #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_REG_MAX, /* sentinel */ |
| }; |
| |
| /* 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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| [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, |
| }, |
| }; |
| |
| 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); |
| |
| 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, ¶m_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) |
| { |
| /* Reports EINVAL for invalid/missing registers */ |
| if (!di || di->regs[reg_index] == INVALID_REG_ADDR) |
| return -EINVAL; |
| |
| return di->bus.read(di, di->regs[reg_index], single); |
| } |
| |
| /* |
| * 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; |
| 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 = { .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_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"); |
