| /* |
| * 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 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 |
| bq27000_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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, |
| }, |
| #define bq2751x_regs bq27510g3_regs |
| #define bq2752x_regs bq27510g3_regs |
| bq27500_regs[BQ27XXX_REG_MAX] = { |
| [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, |
| }, |
| #define bq27510g1_regs bq27500_regs |
| #define bq27510g2_regs bq27500_regs |
| bq27510g3_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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, |
| }, |
| #define bq27531_regs bq27530_regs |
| bq27541_regs[BQ27XXX_REG_MAX] = { |
| [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, |
| }, |
| #define bq27542_regs bq27541_regs |
| #define bq27546_regs bq27541_regs |
| #define bq27742_regs bq27541_regs |
| bq27545_regs[BQ27XXX_REG_MAX] = { |
| [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_regs[BQ27XXX_REG_MAX] = { |
| [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, |
| }; |
| #define bq27425_regs bq27421_regs |
| #define bq27441_regs bq27421_regs |
| #define bq27621_regs bq27421_regs |
| |
| static enum power_supply_property bq27000_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_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, |
| }; |
| |
| #define bq2750x_props bq27510g3_props |
| #define bq2751x_props bq27510g3_props |
| #define bq2752x_props bq27510g3_props |
| |
| static enum power_supply_property bq27500_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, |
| }; |
| #define bq27510g1_props bq27500_props |
| #define bq27510g2_props bq27500_props |
| |
| static enum power_supply_property bq27510g3_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_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, |
| }; |
| |
| #define bq27520g2_props bq27500_props |
| |
| static enum power_supply_property bq27520g3_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_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_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, |
| }; |
| #define bq27531_props bq27530_props |
| |
| static enum power_supply_property bq27541_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, |
| }; |
| #define bq27542_props bq27541_props |
| #define bq27546_props bq27541_props |
| #define bq27742_props bq27541_props |
| |
| static enum power_supply_property bq27545_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_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 bq27425_props bq27421_props |
| #define bq27441_props bq27421_props |
| #define bq27621_props bq27421_props |
| |
| struct bq27xxx_dm_reg { |
| u8 subclass_id; |
| u8 offset; |
| u8 bytes; |
| u16 min, max; |
| }; |
| |
| enum bq27xxx_dm_reg_id { |
| BQ27XXX_DM_DESIGN_CAPACITY = 0, |
| BQ27XXX_DM_DESIGN_ENERGY, |
| BQ27XXX_DM_TERMINATE_VOLTAGE, |
| }; |
| |
| #define bq27000_dm_regs 0 |
| #define bq27010_dm_regs 0 |
| #define bq2750x_dm_regs 0 |
| #define bq2751x_dm_regs 0 |
| #define bq2752x_dm_regs 0 |
| |
| #if 0 /* not yet tested */ |
| static struct bq27xxx_dm_reg bq27500_dm_regs[] = { |
| [BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 10, 2, 0, 65535 }, |
| [BQ27XXX_DM_DESIGN_ENERGY] = { }, /* missing on chip */ |
| [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 }, |
| }; |
| #else |
| #define bq27500_dm_regs 0 |
| #endif |
| |
| /* todo create data memory definitions from datasheets and test on chips */ |
| #define bq27510g1_dm_regs 0 |
| #define bq27510g2_dm_regs 0 |
| #define bq27510g3_dm_regs 0 |
| #define bq27520g1_dm_regs 0 |
| #define bq27520g2_dm_regs 0 |
| #define bq27520g3_dm_regs 0 |
| #define bq27520g4_dm_regs 0 |
| #define bq27530_dm_regs 0 |
| #define bq27531_dm_regs 0 |
| #define bq27541_dm_regs 0 |
| #define bq27542_dm_regs 0 |
| #define bq27546_dm_regs 0 |
| #define bq27742_dm_regs 0 |
| |
| #if 0 /* not yet tested */ |
| static struct bq27xxx_dm_reg bq27545_dm_regs[] = { |
| [BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 23, 2, 0, 32767 }, |
| [BQ27XXX_DM_DESIGN_ENERGY] = { 48, 25, 2, 0, 32767 }, |
| [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800, 3700 }, |
| }; |
| #else |
| #define bq27545_dm_regs 0 |
| #endif |
| |
| static struct bq27xxx_dm_reg bq27421_dm_regs[] = { |
| [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 10, 2, 0, 8000 }, |
| [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 12, 2, 0, 32767 }, |
| [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500, 3700 }, |
| }; |
| |
| static struct bq27xxx_dm_reg bq27425_dm_regs[] = { |
| [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 12, 2, 0, 32767 }, |
| [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 14, 2, 0, 32767 }, |
| [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800, 3700 }, |
| }; |
| |
| #if 0 /* not yet tested */ |
| #define bq27441_dm_regs bq27421_dm_regs |
| #else |
| #define bq27441_dm_regs 0 |
| #endif |
| |
| #if 0 /* not yet tested */ |
| static struct bq27xxx_dm_reg bq27621_dm_regs[] = { |
| [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 3, 2, 0, 8000 }, |
| [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 5, 2, 0, 32767 }, |
| [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500, 3700 }, |
| }; |
| #else |
| #define bq27621_dm_regs 0 |
| #endif |
| |
| #define BQ27XXX_O_ZERO 0x00000001 |
| #define BQ27XXX_O_OTDC 0x00000002 |
| #define BQ27XXX_O_UTOT 0x00000004 |
| #define BQ27XXX_O_CFGUP 0x00000008 |
| #define BQ27XXX_O_RAM 0x00000010 |
| |
| #define BQ27XXX_DATA(ref, key, opt) { \ |
| .opts = (opt), \ |
| .unseal_key = key, \ |
| .regs = ref##_regs, \ |
| .dm_regs = ref##_dm_regs, \ |
| .props = ref##_props, \ |
| .props_size = ARRAY_SIZE(ref##_props) } |
| |
| static struct { |
| u32 opts; |
| u32 unseal_key; |
| u8 *regs; |
| struct bq27xxx_dm_reg *dm_regs; |
| enum power_supply_property *props; |
| size_t props_size; |
| } bq27xxx_chip_data[] = { |
| [BQ27000] = BQ27XXX_DATA(bq27000, 0 , BQ27XXX_O_ZERO), |
| [BQ27010] = BQ27XXX_DATA(bq27010, 0 , BQ27XXX_O_ZERO), |
| [BQ2750X] = BQ27XXX_DATA(bq2750x, 0 , BQ27XXX_O_OTDC), |
| [BQ2751X] = BQ27XXX_DATA(bq2751x, 0 , BQ27XXX_O_OTDC), |
| [BQ2752X] = BQ27XXX_DATA(bq2752x, 0 , BQ27XXX_O_OTDC), |
| [BQ27500] = BQ27XXX_DATA(bq27500, 0x04143672, BQ27XXX_O_OTDC), |
| [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0 , BQ27XXX_O_OTDC), |
| [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0 , BQ27XXX_O_OTDC), |
| [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0 , BQ27XXX_O_OTDC), |
| [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0 , BQ27XXX_O_OTDC), |
| [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0 , BQ27XXX_O_OTDC), |
| [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0 , BQ27XXX_O_OTDC), |
| [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0 , BQ27XXX_O_OTDC), |
| [BQ27530] = BQ27XXX_DATA(bq27530, 0 , BQ27XXX_O_UTOT), |
| [BQ27531] = BQ27XXX_DATA(bq27531, 0 , BQ27XXX_O_UTOT), |
| [BQ27541] = BQ27XXX_DATA(bq27541, 0 , BQ27XXX_O_OTDC), |
| [BQ27542] = BQ27XXX_DATA(bq27542, 0 , BQ27XXX_O_OTDC), |
| [BQ27546] = BQ27XXX_DATA(bq27546, 0 , BQ27XXX_O_OTDC), |
| [BQ27742] = BQ27XXX_DATA(bq27742, 0 , BQ27XXX_O_OTDC), |
| [BQ27545] = BQ27XXX_DATA(bq27545, 0x04143672, BQ27XXX_O_OTDC), |
| [BQ27421] = BQ27XXX_DATA(bq27421, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM), |
| [BQ27425] = BQ27XXX_DATA(bq27425, 0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP), |
| [BQ27441] = BQ27XXX_DATA(bq27441, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM), |
| [BQ27621] = BQ27XXX_DATA(bq27621, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM), |
| }; |
| |
| 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_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; |
| } |
| |
| 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) |
| mod_delayed_work(system_wq, &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) |
| { |
| 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->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) { |
| #else |
| if (!(di->opts & BQ27XXX_O_RAM)) { |
| #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 && di->chip != BQ27425) { // 425 has a bug |
| 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->opts & BQ27XXX_O_CFGUP; |
| 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->opts & BQ27XXX_O_CFGUP)) { |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO) { |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO) |
| 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; |
| } |
| |
| /* |
| * Returns true if a battery over temperature condition is detected |
| */ |
| static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
| { |
| if (di->opts & BQ27XXX_O_OTDC) |
| return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
| if (di->opts & BQ27XXX_O_UTOT) |
| return flags & BQ27XXX_FLAG_OT; |
| |
| 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->opts & BQ27XXX_O_UTOT) |
| 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->opts & BQ27XXX_O_ZERO) |
| 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->opts & BQ27XXX_O_ZERO; |
| |
| 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; |
| } |
| |
| static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di) |
| { |
| struct bq27xxx_reg_cache cache = {0, }; |
| bool has_ci_flag = di->opts & BQ27XXX_O_ZERO; |
| bool has_singe_flag = di->opts & BQ27XXX_O_ZERO; |
| |
| 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); |
| |
| /* 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; |
| |
| if (!di->removed && poll_interval > 0) |
| mod_delayed_work(system_wq, &di->work, poll_interval * HZ); |
| } |
| |
| void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
| { |
| mutex_lock(&di->lock); |
| bq27xxx_battery_update_unlocked(di); |
| mutex_unlock(&di->lock); |
| } |
| 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); |
| } |
| |
| /* |
| * 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->opts & BQ27XXX_O_ZERO) { |
| 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; |
| } |
| |
| /* |
| * Get the average power in µW |
| * Return < 0 if something fails. |
| */ |
| static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di, |
| union power_supply_propval *val) |
| { |
| int power; |
| |
| power = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
| if (power < 0) { |
| dev_err(di->dev, |
| "error reading average power register %02x: %d\n", |
| BQ27XXX_REG_AP, power); |
| return power; |
| } |
| |
| if (di->opts & BQ27XXX_O_ZERO) |
| val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; |
| else |
| /* Other gauges return a signed value in units of 10mW */ |
| val->intval = (int)((s16)power) * 10000; |
| |
| return 0; |
| } |
| |
| static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
| union power_supply_propval *val) |
| { |
| int status; |
| |
| if (di->opts & BQ27XXX_O_ZERO) { |
| 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->opts & BQ27XXX_O_ZERO) { |
| 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)) |
| bq27xxx_battery_update_unlocked(di); |
| 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_battery_pwr_avg(di, 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); |
| |
| /* After charger plug in/out wait 0.5s for things to stabilize */ |
| mod_delayed_work(system_wq, &di->work, HZ / 2); |
| } |
| |
| 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_chip_data[di->chip].regs; |
| di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key; |
| di->dm_regs = bq27xxx_chip_data[di->chip].dm_regs; |
| di->opts = bq27xxx_chip_data[di->chip].opts; |
| |
| 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_chip_data[di->chip].props; |
| psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_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)) { |
| if (PTR_ERR(di->bat) == -EPROBE_DEFER) |
| dev_dbg(di->dev, "failed to register battery, deferring probe\n"); |
| else |
| dev_err(di->dev, "failed to register battery\n"); |
| return PTR_ERR(di->bat); |
| } |
| |
| 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) |
| { |
| mutex_lock(&bq27xxx_list_lock); |
| list_del(&di->list); |
| mutex_unlock(&bq27xxx_list_lock); |
| |
| /* Set removed to avoid bq27xxx_battery_update() re-queuing the work */ |
| mutex_lock(&di->lock); |
| di->removed = true; |
| mutex_unlock(&di->lock); |
| |
| cancel_delayed_work_sync(&di->work); |
| |
| power_supply_unregister(di->bat); |
| mutex_destroy(&di->lock); |
| } |
| EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown); |
| |
| MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
| MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
| MODULE_LICENSE("GPL"); |