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![Krzysztof Kozlowski](/assets/img/avatar_default.png)
Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
596 lines
15 KiB
C
596 lines
15 KiB
C
/*
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* Battery driver for Maxim MAX8925
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*
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* Copyright (c) 2009-2010 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/mfd/max8925.h>
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/* registers in GPM */
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#define MAX8925_OUT5VEN 0x54
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#define MAX8925_OUT3VEN 0x58
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#define MAX8925_CHG_CNTL1 0x7c
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/* bits definition */
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#define MAX8925_CHG_STAT_VSYSLOW (1 << 0)
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#define MAX8925_CHG_STAT_MODE_MASK (3 << 2)
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#define MAX8925_CHG_STAT_EN_MASK (1 << 4)
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#define MAX8925_CHG_MBDET (1 << 1)
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#define MAX8925_CHG_AC_RANGE_MASK (3 << 6)
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/* registers in ADC */
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#define MAX8925_ADC_RES_CNFG1 0x06
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#define MAX8925_ADC_AVG_CNFG1 0x07
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#define MAX8925_ADC_ACQ_CNFG1 0x08
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#define MAX8925_ADC_ACQ_CNFG2 0x09
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/* 2 bytes registers in below. MSB is 1st, LSB is 2nd. */
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#define MAX8925_ADC_AUX2 0x62
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#define MAX8925_ADC_VCHG 0x64
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#define MAX8925_ADC_VBBATT 0x66
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#define MAX8925_ADC_VMBATT 0x68
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#define MAX8925_ADC_ISNS 0x6a
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#define MAX8925_ADC_THM 0x6c
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#define MAX8925_ADC_TDIE 0x6e
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#define MAX8925_CMD_AUX2 0xc8
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#define MAX8925_CMD_VCHG 0xd0
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#define MAX8925_CMD_VBBATT 0xd8
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#define MAX8925_CMD_VMBATT 0xe0
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#define MAX8925_CMD_ISNS 0xe8
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#define MAX8925_CMD_THM 0xf0
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#define MAX8925_CMD_TDIE 0xf8
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enum {
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MEASURE_AUX2,
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MEASURE_VCHG,
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MEASURE_VBBATT,
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MEASURE_VMBATT,
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MEASURE_ISNS,
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MEASURE_THM,
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MEASURE_TDIE,
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MEASURE_MAX,
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};
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struct max8925_power_info {
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struct max8925_chip *chip;
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struct i2c_client *gpm;
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struct i2c_client *adc;
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struct power_supply *ac;
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struct power_supply *usb;
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struct power_supply *battery;
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int irq_base;
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unsigned ac_online:1;
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unsigned usb_online:1;
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unsigned bat_online:1;
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unsigned chg_mode:2;
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unsigned batt_detect:1; /* detecing MB by ID pin */
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unsigned topoff_threshold:2;
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unsigned fast_charge:3;
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unsigned no_temp_support:1;
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unsigned no_insert_detect:1;
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int (*set_charger) (int);
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};
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static int __set_charger(struct max8925_power_info *info, int enable)
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{
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struct max8925_chip *chip = info->chip;
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if (enable) {
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/* enable charger in platform */
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if (info->set_charger)
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info->set_charger(1);
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/* enable charger */
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max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 0);
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} else {
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/* disable charge */
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max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 1 << 7);
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if (info->set_charger)
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info->set_charger(0);
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}
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dev_dbg(chip->dev, "%s\n", (enable) ? "Enable charger"
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: "Disable charger");
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return 0;
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}
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static irqreturn_t max8925_charger_handler(int irq, void *data)
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{
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struct max8925_power_info *info = (struct max8925_power_info *)data;
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struct max8925_chip *chip = info->chip;
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switch (irq - chip->irq_base) {
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case MAX8925_IRQ_VCHG_DC_R:
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info->ac_online = 1;
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__set_charger(info, 1);
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dev_dbg(chip->dev, "Adapter inserted\n");
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break;
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case MAX8925_IRQ_VCHG_DC_F:
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info->ac_online = 0;
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__set_charger(info, 0);
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dev_dbg(chip->dev, "Adapter removed\n");
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break;
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case MAX8925_IRQ_VCHG_THM_OK_F:
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/* Battery is not ready yet */
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dev_dbg(chip->dev, "Battery temperature is out of range\n");
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case MAX8925_IRQ_VCHG_DC_OVP:
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dev_dbg(chip->dev, "Error detection\n");
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__set_charger(info, 0);
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break;
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case MAX8925_IRQ_VCHG_THM_OK_R:
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/* Battery is ready now */
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dev_dbg(chip->dev, "Battery temperature is in range\n");
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break;
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case MAX8925_IRQ_VCHG_SYSLOW_R:
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/* VSYS is low */
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dev_info(chip->dev, "Sys power is too low\n");
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break;
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case MAX8925_IRQ_VCHG_SYSLOW_F:
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dev_dbg(chip->dev, "Sys power is above low threshold\n");
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break;
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case MAX8925_IRQ_VCHG_DONE:
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__set_charger(info, 0);
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dev_dbg(chip->dev, "Charging is done\n");
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break;
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case MAX8925_IRQ_VCHG_TOPOFF:
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dev_dbg(chip->dev, "Charging in top-off mode\n");
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break;
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case MAX8925_IRQ_VCHG_TMR_FAULT:
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__set_charger(info, 0);
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dev_dbg(chip->dev, "Safe timer is expired\n");
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break;
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case MAX8925_IRQ_VCHG_RST:
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__set_charger(info, 0);
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dev_dbg(chip->dev, "Charger is reset\n");
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break;
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}
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return IRQ_HANDLED;
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}
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static int start_measure(struct max8925_power_info *info, int type)
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{
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unsigned char buf[2] = {0, 0};
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int meas_cmd;
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int meas_reg = 0, ret;
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switch (type) {
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case MEASURE_VCHG:
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meas_cmd = MAX8925_CMD_VCHG;
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meas_reg = MAX8925_ADC_VCHG;
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break;
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case MEASURE_VBBATT:
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meas_cmd = MAX8925_CMD_VBBATT;
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meas_reg = MAX8925_ADC_VBBATT;
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break;
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case MEASURE_VMBATT:
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meas_cmd = MAX8925_CMD_VMBATT;
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meas_reg = MAX8925_ADC_VMBATT;
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break;
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case MEASURE_ISNS:
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meas_cmd = MAX8925_CMD_ISNS;
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meas_reg = MAX8925_ADC_ISNS;
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break;
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default:
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return -EINVAL;
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}
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max8925_reg_write(info->adc, meas_cmd, 0);
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max8925_bulk_read(info->adc, meas_reg, 2, buf);
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ret = ((buf[0]<<8) | buf[1]) >> 4;
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return ret;
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}
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static int max8925_ac_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = info->ac_online;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (info->ac_online) {
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ret = start_measure(info, MEASURE_VCHG);
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if (ret >= 0) {
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val->intval = ret * 2000; /* unit is uV */
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goto out;
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}
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}
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ret = -ENODATA;
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break;
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default:
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ret = -ENODEV;
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break;
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}
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out:
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return ret;
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}
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static enum power_supply_property max8925_ac_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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};
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static int max8925_usb_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = info->usb_online;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (info->usb_online) {
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ret = start_measure(info, MEASURE_VCHG);
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if (ret >= 0) {
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val->intval = ret * 2000; /* unit is uV */
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goto out;
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}
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}
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ret = -ENODATA;
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break;
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default:
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ret = -ENODEV;
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break;
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}
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out:
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return ret;
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}
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static enum power_supply_property max8925_usb_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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};
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static int max8925_bat_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct max8925_power_info *info = dev_get_drvdata(psy->dev.parent);
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = info->bat_online;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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if (info->bat_online) {
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ret = start_measure(info, MEASURE_VMBATT);
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if (ret >= 0) {
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val->intval = ret * 2000; /* unit is uV */
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ret = 0;
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break;
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}
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}
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ret = -ENODATA;
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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if (info->bat_online) {
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ret = start_measure(info, MEASURE_ISNS);
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if (ret >= 0) {
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/* assume r_sns is 0.02 */
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ret = ((ret * 6250) - 3125) /* uA */;
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val->intval = 0;
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if (ret > 0)
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val->intval = ret; /* unit is mA */
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ret = 0;
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break;
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}
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}
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ret = -ENODATA;
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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if (!info->bat_online) {
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ret = -ENODATA;
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break;
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}
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ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
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ret = (ret & MAX8925_CHG_STAT_MODE_MASK) >> 2;
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switch (ret) {
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case 1:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
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break;
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case 0:
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case 2:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
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break;
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case 3:
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val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
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break;
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}
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ret = 0;
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break;
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case POWER_SUPPLY_PROP_STATUS:
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if (!info->bat_online) {
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ret = -ENODATA;
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break;
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}
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ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
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if (info->usb_online || info->ac_online) {
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val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
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if (ret & MAX8925_CHG_STAT_EN_MASK)
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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} else
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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ret = 0;
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break;
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default:
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ret = -ENODEV;
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break;
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}
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return ret;
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}
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static enum power_supply_property max8925_battery_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_CHARGE_TYPE,
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POWER_SUPPLY_PROP_STATUS,
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};
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static const struct power_supply_desc ac_desc = {
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.name = "max8925-ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.properties = max8925_ac_props,
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.num_properties = ARRAY_SIZE(max8925_ac_props),
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.get_property = max8925_ac_get_prop,
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};
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static const struct power_supply_desc usb_desc = {
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.name = "max8925-usb",
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.type = POWER_SUPPLY_TYPE_USB,
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.properties = max8925_usb_props,
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.num_properties = ARRAY_SIZE(max8925_usb_props),
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.get_property = max8925_usb_get_prop,
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};
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static const struct power_supply_desc battery_desc = {
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.name = "max8925-battery",
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.properties = max8925_battery_props,
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.num_properties = ARRAY_SIZE(max8925_battery_props),
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.get_property = max8925_bat_get_prop,
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};
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#define REQUEST_IRQ(_irq, _name) \
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do { \
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ret = request_threaded_irq(chip->irq_base + _irq, NULL, \
|
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max8925_charger_handler, \
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IRQF_ONESHOT, _name, info); \
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if (ret) \
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dev_err(chip->dev, "Failed to request IRQ #%d: %d\n", \
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_irq, ret); \
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} while (0)
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static int max8925_init_charger(struct max8925_chip *chip,
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struct max8925_power_info *info)
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{
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int ret;
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|
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REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_OVP, "ac-ovp");
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if (!info->no_insert_detect) {
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REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_F, "ac-remove");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_R, "ac-insert");
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}
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if (!info->no_temp_support) {
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REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_R, "batt-temp-in-range");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_F, "batt-temp-out-range");
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}
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REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_F, "vsys-high");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_R, "vsys-low");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_RST, "charger-reset");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_DONE, "charger-done");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_TOPOFF, "charger-topoff");
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REQUEST_IRQ(MAX8925_IRQ_VCHG_TMR_FAULT, "charger-timer-expire");
|
|
|
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info->usb_online = 0;
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info->bat_online = 0;
|
|
|
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/* check for power - can miss interrupt at boot time */
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if (start_measure(info, MEASURE_VCHG) * 2000 > 500000)
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info->ac_online = 1;
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else
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info->ac_online = 0;
|
|
|
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ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
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if (ret >= 0) {
|
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/*
|
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* If battery detection is enabled, ID pin of battery is
|
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* connected to MBDET pin of MAX8925. It could be used to
|
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* detect battery presence.
|
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* Otherwise, we have to assume that battery is always on.
|
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*/
|
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if (info->batt_detect)
|
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info->bat_online = (ret & MAX8925_CHG_MBDET) ? 0 : 1;
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else
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info->bat_online = 1;
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if (ret & MAX8925_CHG_AC_RANGE_MASK)
|
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info->ac_online = 1;
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else
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info->ac_online = 0;
|
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}
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/* disable charge */
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max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 1 << 7);
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/* set charging current in charge topoff mode */
|
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max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 3 << 5,
|
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info->topoff_threshold << 5);
|
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/* set charing current in fast charge mode */
|
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max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 7, info->fast_charge);
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|
|
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return 0;
|
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}
|
|
|
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static int max8925_deinit_charger(struct max8925_power_info *info)
|
|
{
|
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struct max8925_chip *chip = info->chip;
|
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int irq;
|
|
|
|
irq = chip->irq_base + MAX8925_IRQ_VCHG_DC_OVP;
|
|
for (; irq <= chip->irq_base + MAX8925_IRQ_VCHG_TMR_FAULT; irq++)
|
|
free_irq(irq, info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct max8925_power_pdata *
|
|
max8925_power_dt_init(struct platform_device *pdev)
|
|
{
|
|
struct device_node *nproot = pdev->dev.parent->of_node;
|
|
struct device_node *np;
|
|
int batt_detect;
|
|
int topoff_threshold;
|
|
int fast_charge;
|
|
int no_temp_support;
|
|
int no_insert_detect;
|
|
struct max8925_power_pdata *pdata;
|
|
|
|
if (!nproot)
|
|
return pdev->dev.platform_data;
|
|
|
|
np = of_get_child_by_name(nproot, "charger");
|
|
if (!np) {
|
|
dev_err(&pdev->dev, "failed to find charger node\n");
|
|
return NULL;
|
|
}
|
|
|
|
pdata = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct max8925_power_pdata),
|
|
GFP_KERNEL);
|
|
if (!pdata)
|
|
goto ret;
|
|
|
|
of_property_read_u32(np, "topoff-threshold", &topoff_threshold);
|
|
of_property_read_u32(np, "batt-detect", &batt_detect);
|
|
of_property_read_u32(np, "fast-charge", &fast_charge);
|
|
of_property_read_u32(np, "no-insert-detect", &no_insert_detect);
|
|
of_property_read_u32(np, "no-temp-support", &no_temp_support);
|
|
|
|
pdata->batt_detect = batt_detect;
|
|
pdata->fast_charge = fast_charge;
|
|
pdata->topoff_threshold = topoff_threshold;
|
|
pdata->no_insert_detect = no_insert_detect;
|
|
pdata->no_temp_support = no_temp_support;
|
|
|
|
ret:
|
|
of_node_put(np);
|
|
return pdata;
|
|
}
|
|
#else
|
|
static struct max8925_power_pdata *
|
|
max8925_power_dt_init(struct platform_device *pdev)
|
|
{
|
|
return pdev->dev.platform_data;
|
|
}
|
|
#endif
|
|
|
|
static int max8925_power_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
|
|
struct power_supply_config psy_cfg = {}; /* Only for ac and usb */
|
|
struct max8925_power_pdata *pdata = NULL;
|
|
struct max8925_power_info *info;
|
|
int ret;
|
|
|
|
pdata = max8925_power_dt_init(pdev);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "platform data isn't assigned to "
|
|
"power supply\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_power_info),
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
info->chip = chip;
|
|
info->gpm = chip->i2c;
|
|
info->adc = chip->adc;
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
psy_cfg.supplied_to = pdata->supplied_to;
|
|
psy_cfg.num_supplicants = pdata->num_supplicants;
|
|
|
|
info->ac = power_supply_register(&pdev->dev, &ac_desc, &psy_cfg);
|
|
if (IS_ERR(info->ac)) {
|
|
ret = PTR_ERR(info->ac);
|
|
goto out;
|
|
}
|
|
info->ac->dev.parent = &pdev->dev;
|
|
|
|
info->usb = power_supply_register(&pdev->dev, &usb_desc, &psy_cfg);
|
|
if (IS_ERR(info->usb)) {
|
|
ret = PTR_ERR(info->usb);
|
|
goto out_usb;
|
|
}
|
|
info->usb->dev.parent = &pdev->dev;
|
|
|
|
info->battery = power_supply_register(&pdev->dev, &battery_desc, NULL);
|
|
if (IS_ERR(info->battery)) {
|
|
ret = PTR_ERR(info->battery);
|
|
goto out_battery;
|
|
}
|
|
info->battery->dev.parent = &pdev->dev;
|
|
|
|
info->batt_detect = pdata->batt_detect;
|
|
info->topoff_threshold = pdata->topoff_threshold;
|
|
info->fast_charge = pdata->fast_charge;
|
|
info->set_charger = pdata->set_charger;
|
|
info->no_temp_support = pdata->no_temp_support;
|
|
info->no_insert_detect = pdata->no_insert_detect;
|
|
|
|
max8925_init_charger(chip, info);
|
|
return 0;
|
|
out_battery:
|
|
power_supply_unregister(info->battery);
|
|
out_usb:
|
|
power_supply_unregister(info->ac);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int max8925_power_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8925_power_info *info = platform_get_drvdata(pdev);
|
|
|
|
if (info) {
|
|
power_supply_unregister(info->ac);
|
|
power_supply_unregister(info->usb);
|
|
power_supply_unregister(info->battery);
|
|
max8925_deinit_charger(info);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver max8925_power_driver = {
|
|
.probe = max8925_power_probe,
|
|
.remove = max8925_power_remove,
|
|
.driver = {
|
|
.name = "max8925-power",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(max8925_power_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Power supply driver for MAX8925");
|
|
MODULE_ALIAS("platform:max8925-power");
|