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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>
1335 lines
32 KiB
C
1335 lines
32 KiB
C
/*
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* Summit Microelectronics SMB347 Battery Charger Driver
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*
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* Copyright (C) 2011, Intel Corporation
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*
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* Authors: Bruce E. Robertson <bruce.e.robertson@intel.com>
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* Mika Westerberg <mika.westerberg@linux.intel.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/err.h>
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#include <linux/gpio.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/power_supply.h>
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#include <linux/power/smb347-charger.h>
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#include <linux/regmap.h>
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/*
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* Configuration registers. These are mirrored to volatile RAM and can be
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* written once %CMD_A_ALLOW_WRITE is set in %CMD_A register. They will be
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* reloaded from non-volatile registers after POR.
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*/
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#define CFG_CHARGE_CURRENT 0x00
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#define CFG_CHARGE_CURRENT_FCC_MASK 0xe0
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#define CFG_CHARGE_CURRENT_FCC_SHIFT 5
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#define CFG_CHARGE_CURRENT_PCC_MASK 0x18
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#define CFG_CHARGE_CURRENT_PCC_SHIFT 3
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#define CFG_CHARGE_CURRENT_TC_MASK 0x07
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#define CFG_CURRENT_LIMIT 0x01
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#define CFG_CURRENT_LIMIT_DC_MASK 0xf0
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#define CFG_CURRENT_LIMIT_DC_SHIFT 4
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#define CFG_CURRENT_LIMIT_USB_MASK 0x0f
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#define CFG_FLOAT_VOLTAGE 0x03
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#define CFG_FLOAT_VOLTAGE_FLOAT_MASK 0x3f
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#define CFG_FLOAT_VOLTAGE_THRESHOLD_MASK 0xc0
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#define CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT 6
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#define CFG_STAT 0x05
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#define CFG_STAT_DISABLED BIT(5)
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#define CFG_STAT_ACTIVE_HIGH BIT(7)
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#define CFG_PIN 0x06
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#define CFG_PIN_EN_CTRL_MASK 0x60
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#define CFG_PIN_EN_CTRL_ACTIVE_HIGH 0x40
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#define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60
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#define CFG_PIN_EN_APSD_IRQ BIT(1)
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#define CFG_PIN_EN_CHARGER_ERROR BIT(2)
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#define CFG_THERM 0x07
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#define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03
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#define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0
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#define CFG_THERM_SOFT_COLD_COMPENSATION_MASK 0x0c
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#define CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT 2
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#define CFG_THERM_MONITOR_DISABLED BIT(4)
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#define CFG_SYSOK 0x08
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#define CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED BIT(2)
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#define CFG_OTHER 0x09
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#define CFG_OTHER_RID_MASK 0xc0
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#define CFG_OTHER_RID_ENABLED_AUTO_OTG 0xc0
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#define CFG_OTG 0x0a
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#define CFG_OTG_TEMP_THRESHOLD_MASK 0x30
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#define CFG_OTG_TEMP_THRESHOLD_SHIFT 4
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#define CFG_OTG_CC_COMPENSATION_MASK 0xc0
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#define CFG_OTG_CC_COMPENSATION_SHIFT 6
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#define CFG_TEMP_LIMIT 0x0b
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#define CFG_TEMP_LIMIT_SOFT_HOT_MASK 0x03
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#define CFG_TEMP_LIMIT_SOFT_HOT_SHIFT 0
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#define CFG_TEMP_LIMIT_SOFT_COLD_MASK 0x0c
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#define CFG_TEMP_LIMIT_SOFT_COLD_SHIFT 2
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#define CFG_TEMP_LIMIT_HARD_HOT_MASK 0x30
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#define CFG_TEMP_LIMIT_HARD_HOT_SHIFT 4
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#define CFG_TEMP_LIMIT_HARD_COLD_MASK 0xc0
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#define CFG_TEMP_LIMIT_HARD_COLD_SHIFT 6
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#define CFG_FAULT_IRQ 0x0c
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#define CFG_FAULT_IRQ_DCIN_UV BIT(2)
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#define CFG_STATUS_IRQ 0x0d
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#define CFG_STATUS_IRQ_TERMINATION_OR_TAPER BIT(4)
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#define CFG_STATUS_IRQ_CHARGE_TIMEOUT BIT(7)
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#define CFG_ADDRESS 0x0e
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/* Command registers */
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#define CMD_A 0x30
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#define CMD_A_CHG_ENABLED BIT(1)
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#define CMD_A_SUSPEND_ENABLED BIT(2)
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#define CMD_A_ALLOW_WRITE BIT(7)
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#define CMD_B 0x31
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#define CMD_C 0x33
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/* Interrupt Status registers */
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#define IRQSTAT_A 0x35
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#define IRQSTAT_C 0x37
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#define IRQSTAT_C_TERMINATION_STAT BIT(0)
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#define IRQSTAT_C_TERMINATION_IRQ BIT(1)
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#define IRQSTAT_C_TAPER_IRQ BIT(3)
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#define IRQSTAT_D 0x38
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#define IRQSTAT_D_CHARGE_TIMEOUT_STAT BIT(2)
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#define IRQSTAT_D_CHARGE_TIMEOUT_IRQ BIT(3)
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#define IRQSTAT_E 0x39
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#define IRQSTAT_E_USBIN_UV_STAT BIT(0)
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#define IRQSTAT_E_USBIN_UV_IRQ BIT(1)
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#define IRQSTAT_E_DCIN_UV_STAT BIT(4)
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#define IRQSTAT_E_DCIN_UV_IRQ BIT(5)
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#define IRQSTAT_F 0x3a
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/* Status registers */
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#define STAT_A 0x3b
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#define STAT_A_FLOAT_VOLTAGE_MASK 0x3f
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#define STAT_B 0x3c
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#define STAT_C 0x3d
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#define STAT_C_CHG_ENABLED BIT(0)
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#define STAT_C_HOLDOFF_STAT BIT(3)
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#define STAT_C_CHG_MASK 0x06
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#define STAT_C_CHG_SHIFT 1
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#define STAT_C_CHG_TERM BIT(5)
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#define STAT_C_CHARGER_ERROR BIT(6)
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#define STAT_E 0x3f
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#define SMB347_MAX_REGISTER 0x3f
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/**
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* struct smb347_charger - smb347 charger instance
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* @lock: protects concurrent access to online variables
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* @dev: pointer to device
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* @regmap: pointer to driver regmap
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* @mains: power_supply instance for AC/DC power
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* @usb: power_supply instance for USB power
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* @battery: power_supply instance for battery
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* @mains_online: is AC/DC input connected
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* @usb_online: is USB input connected
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* @charging_enabled: is charging enabled
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* @pdata: pointer to platform data
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*/
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struct smb347_charger {
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struct mutex lock;
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struct device *dev;
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struct regmap *regmap;
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struct power_supply *mains;
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struct power_supply *usb;
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struct power_supply *battery;
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bool mains_online;
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bool usb_online;
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bool charging_enabled;
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const struct smb347_charger_platform_data *pdata;
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};
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/* Fast charge current in uA */
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static const unsigned int fcc_tbl[] = {
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700000,
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900000,
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1200000,
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1500000,
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1800000,
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2000000,
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2200000,
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2500000,
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};
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/* Pre-charge current in uA */
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static const unsigned int pcc_tbl[] = {
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100000,
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150000,
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200000,
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250000,
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};
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/* Termination current in uA */
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static const unsigned int tc_tbl[] = {
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37500,
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50000,
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100000,
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150000,
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200000,
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250000,
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500000,
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600000,
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};
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/* Input current limit in uA */
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static const unsigned int icl_tbl[] = {
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300000,
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500000,
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700000,
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900000,
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1200000,
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1500000,
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1800000,
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2000000,
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2200000,
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2500000,
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};
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/* Charge current compensation in uA */
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static const unsigned int ccc_tbl[] = {
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250000,
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700000,
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900000,
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1200000,
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};
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/* Convert register value to current using lookup table */
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static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val)
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{
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if (val >= size)
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return -EINVAL;
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return tbl[val];
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}
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/* Convert current to register value using lookup table */
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static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val)
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{
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size_t i;
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for (i = 0; i < size; i++)
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if (val < tbl[i])
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break;
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return i > 0 ? i - 1 : -EINVAL;
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}
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/**
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* smb347_update_ps_status - refreshes the power source status
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* @smb: pointer to smb347 charger instance
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*
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* Function checks whether any power source is connected to the charger and
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* updates internal state accordingly. If there is a change to previous state
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* function returns %1, otherwise %0 and negative errno in case of errror.
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*/
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static int smb347_update_ps_status(struct smb347_charger *smb)
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{
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bool usb = false;
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bool dc = false;
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unsigned int val;
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int ret;
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ret = regmap_read(smb->regmap, IRQSTAT_E, &val);
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if (ret < 0)
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return ret;
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/*
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* Dc and usb are set depending on whether they are enabled in
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* platform data _and_ whether corresponding undervoltage is set.
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*/
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if (smb->pdata->use_mains)
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dc = !(val & IRQSTAT_E_DCIN_UV_STAT);
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if (smb->pdata->use_usb)
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usb = !(val & IRQSTAT_E_USBIN_UV_STAT);
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mutex_lock(&smb->lock);
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ret = smb->mains_online != dc || smb->usb_online != usb;
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smb->mains_online = dc;
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smb->usb_online = usb;
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mutex_unlock(&smb->lock);
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return ret;
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}
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/*
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* smb347_is_ps_online - returns whether input power source is connected
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* @smb: pointer to smb347 charger instance
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*
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* Returns %true if input power source is connected. Note that this is
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* dependent on what platform has configured for usable power sources. For
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* example if USB is disabled, this will return %false even if the USB cable
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* is connected.
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*/
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static bool smb347_is_ps_online(struct smb347_charger *smb)
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{
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bool ret;
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mutex_lock(&smb->lock);
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ret = smb->usb_online || smb->mains_online;
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mutex_unlock(&smb->lock);
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return ret;
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}
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/**
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* smb347_charging_status - returns status of charging
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* @smb: pointer to smb347 charger instance
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*
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* Function returns charging status. %0 means no charging is in progress,
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* %1 means pre-charging, %2 fast-charging and %3 taper-charging.
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*/
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static int smb347_charging_status(struct smb347_charger *smb)
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{
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unsigned int val;
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int ret;
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if (!smb347_is_ps_online(smb))
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return 0;
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ret = regmap_read(smb->regmap, STAT_C, &val);
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if (ret < 0)
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return 0;
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return (val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT;
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}
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static int smb347_charging_set(struct smb347_charger *smb, bool enable)
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{
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int ret = 0;
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if (smb->pdata->enable_control != SMB347_CHG_ENABLE_SW) {
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dev_dbg(smb->dev, "charging enable/disable in SW disabled\n");
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return 0;
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}
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mutex_lock(&smb->lock);
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if (smb->charging_enabled != enable) {
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ret = regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED,
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enable ? CMD_A_CHG_ENABLED : 0);
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if (!ret)
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smb->charging_enabled = enable;
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}
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mutex_unlock(&smb->lock);
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return ret;
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}
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static inline int smb347_charging_enable(struct smb347_charger *smb)
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{
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return smb347_charging_set(smb, true);
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}
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static inline int smb347_charging_disable(struct smb347_charger *smb)
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{
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return smb347_charging_set(smb, false);
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}
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static int smb347_start_stop_charging(struct smb347_charger *smb)
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{
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int ret;
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/*
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* Depending on whether valid power source is connected or not, we
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* disable or enable the charging. We do it manually because it
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* depends on how the platform has configured the valid inputs.
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*/
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if (smb347_is_ps_online(smb)) {
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ret = smb347_charging_enable(smb);
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if (ret < 0)
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dev_err(smb->dev, "failed to enable charging\n");
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} else {
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ret = smb347_charging_disable(smb);
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if (ret < 0)
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dev_err(smb->dev, "failed to disable charging\n");
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}
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return ret;
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}
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static int smb347_set_charge_current(struct smb347_charger *smb)
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{
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int ret;
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if (smb->pdata->max_charge_current) {
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ret = current_to_hw(fcc_tbl, ARRAY_SIZE(fcc_tbl),
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smb->pdata->max_charge_current);
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if (ret < 0)
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return ret;
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|
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ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
|
|
CFG_CHARGE_CURRENT_FCC_MASK,
|
|
ret << CFG_CHARGE_CURRENT_FCC_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->pre_charge_current) {
|
|
ret = current_to_hw(pcc_tbl, ARRAY_SIZE(pcc_tbl),
|
|
smb->pdata->pre_charge_current);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
|
|
CFG_CHARGE_CURRENT_PCC_MASK,
|
|
ret << CFG_CHARGE_CURRENT_PCC_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->termination_current) {
|
|
ret = current_to_hw(tc_tbl, ARRAY_SIZE(tc_tbl),
|
|
smb->pdata->termination_current);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT,
|
|
CFG_CHARGE_CURRENT_TC_MASK, ret);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smb347_set_current_limits(struct smb347_charger *smb)
|
|
{
|
|
int ret;
|
|
|
|
if (smb->pdata->mains_current_limit) {
|
|
ret = current_to_hw(icl_tbl, ARRAY_SIZE(icl_tbl),
|
|
smb->pdata->mains_current_limit);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT,
|
|
CFG_CURRENT_LIMIT_DC_MASK,
|
|
ret << CFG_CURRENT_LIMIT_DC_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->usb_hc_current_limit) {
|
|
ret = current_to_hw(icl_tbl, ARRAY_SIZE(icl_tbl),
|
|
smb->pdata->usb_hc_current_limit);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT,
|
|
CFG_CURRENT_LIMIT_USB_MASK, ret);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smb347_set_voltage_limits(struct smb347_charger *smb)
|
|
{
|
|
int ret;
|
|
|
|
if (smb->pdata->pre_to_fast_voltage) {
|
|
ret = smb->pdata->pre_to_fast_voltage;
|
|
|
|
/* uV */
|
|
ret = clamp_val(ret, 2400000, 3000000) - 2400000;
|
|
ret /= 200000;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE,
|
|
CFG_FLOAT_VOLTAGE_THRESHOLD_MASK,
|
|
ret << CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->max_charge_voltage) {
|
|
ret = smb->pdata->max_charge_voltage;
|
|
|
|
/* uV */
|
|
ret = clamp_val(ret, 3500000, 4500000) - 3500000;
|
|
ret /= 20000;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE,
|
|
CFG_FLOAT_VOLTAGE_FLOAT_MASK, ret);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smb347_set_temp_limits(struct smb347_charger *smb)
|
|
{
|
|
bool enable_therm_monitor = false;
|
|
int ret = 0;
|
|
int val;
|
|
|
|
if (smb->pdata->chip_temp_threshold) {
|
|
val = smb->pdata->chip_temp_threshold;
|
|
|
|
/* degree C */
|
|
val = clamp_val(val, 100, 130) - 100;
|
|
val /= 10;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_OTG,
|
|
CFG_OTG_TEMP_THRESHOLD_MASK,
|
|
val << CFG_OTG_TEMP_THRESHOLD_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->soft_cold_temp_limit != SMB347_TEMP_USE_DEFAULT) {
|
|
val = smb->pdata->soft_cold_temp_limit;
|
|
|
|
val = clamp_val(val, 0, 15);
|
|
val /= 5;
|
|
/* this goes from higher to lower so invert the value */
|
|
val = ~val & 0x3;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
|
|
CFG_TEMP_LIMIT_SOFT_COLD_MASK,
|
|
val << CFG_TEMP_LIMIT_SOFT_COLD_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
enable_therm_monitor = true;
|
|
}
|
|
|
|
if (smb->pdata->soft_hot_temp_limit != SMB347_TEMP_USE_DEFAULT) {
|
|
val = smb->pdata->soft_hot_temp_limit;
|
|
|
|
val = clamp_val(val, 40, 55) - 40;
|
|
val /= 5;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
|
|
CFG_TEMP_LIMIT_SOFT_HOT_MASK,
|
|
val << CFG_TEMP_LIMIT_SOFT_HOT_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
enable_therm_monitor = true;
|
|
}
|
|
|
|
if (smb->pdata->hard_cold_temp_limit != SMB347_TEMP_USE_DEFAULT) {
|
|
val = smb->pdata->hard_cold_temp_limit;
|
|
|
|
val = clamp_val(val, -5, 10) + 5;
|
|
val /= 5;
|
|
/* this goes from higher to lower so invert the value */
|
|
val = ~val & 0x3;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
|
|
CFG_TEMP_LIMIT_HARD_COLD_MASK,
|
|
val << CFG_TEMP_LIMIT_HARD_COLD_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
enable_therm_monitor = true;
|
|
}
|
|
|
|
if (smb->pdata->hard_hot_temp_limit != SMB347_TEMP_USE_DEFAULT) {
|
|
val = smb->pdata->hard_hot_temp_limit;
|
|
|
|
val = clamp_val(val, 50, 65) - 50;
|
|
val /= 5;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT,
|
|
CFG_TEMP_LIMIT_HARD_HOT_MASK,
|
|
val << CFG_TEMP_LIMIT_HARD_HOT_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
enable_therm_monitor = true;
|
|
}
|
|
|
|
/*
|
|
* If any of the temperature limits are set, we also enable the
|
|
* thermistor monitoring.
|
|
*
|
|
* When soft limits are hit, the device will start to compensate
|
|
* current and/or voltage depending on the configuration.
|
|
*
|
|
* When hard limit is hit, the device will suspend charging
|
|
* depending on the configuration.
|
|
*/
|
|
if (enable_therm_monitor) {
|
|
ret = regmap_update_bits(smb->regmap, CFG_THERM,
|
|
CFG_THERM_MONITOR_DISABLED, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->suspend_on_hard_temp_limit) {
|
|
ret = regmap_update_bits(smb->regmap, CFG_SYSOK,
|
|
CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->soft_temp_limit_compensation !=
|
|
SMB347_SOFT_TEMP_COMPENSATE_DEFAULT) {
|
|
val = smb->pdata->soft_temp_limit_compensation & 0x3;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_THERM,
|
|
CFG_THERM_SOFT_HOT_COMPENSATION_MASK,
|
|
val << CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_THERM,
|
|
CFG_THERM_SOFT_COLD_COMPENSATION_MASK,
|
|
val << CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (smb->pdata->charge_current_compensation) {
|
|
val = current_to_hw(ccc_tbl, ARRAY_SIZE(ccc_tbl),
|
|
smb->pdata->charge_current_compensation);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_OTG,
|
|
CFG_OTG_CC_COMPENSATION_MASK,
|
|
(val & 0x3) << CFG_OTG_CC_COMPENSATION_SHIFT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* smb347_set_writable - enables/disables writing to non-volatile registers
|
|
* @smb: pointer to smb347 charger instance
|
|
*
|
|
* You can enable/disable writing to the non-volatile configuration
|
|
* registers by calling this function.
|
|
*
|
|
* Returns %0 on success and negative errno in case of failure.
|
|
*/
|
|
static int smb347_set_writable(struct smb347_charger *smb, bool writable)
|
|
{
|
|
return regmap_update_bits(smb->regmap, CMD_A, CMD_A_ALLOW_WRITE,
|
|
writable ? CMD_A_ALLOW_WRITE : 0);
|
|
}
|
|
|
|
static int smb347_hw_init(struct smb347_charger *smb)
|
|
{
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = smb347_set_writable(smb, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Program the platform specific configuration values to the device
|
|
* first.
|
|
*/
|
|
ret = smb347_set_charge_current(smb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = smb347_set_current_limits(smb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = smb347_set_voltage_limits(smb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = smb347_set_temp_limits(smb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/* If USB charging is disabled we put the USB in suspend mode */
|
|
if (!smb->pdata->use_usb) {
|
|
ret = regmap_update_bits(smb->regmap, CMD_A,
|
|
CMD_A_SUSPEND_ENABLED,
|
|
CMD_A_SUSPEND_ENABLED);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* If configured by platform data, we enable hardware Auto-OTG
|
|
* support for driving VBUS. Otherwise we disable it.
|
|
*/
|
|
ret = regmap_update_bits(smb->regmap, CFG_OTHER, CFG_OTHER_RID_MASK,
|
|
smb->pdata->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/*
|
|
* Make the charging functionality controllable by a write to the
|
|
* command register unless pin control is specified in the platform
|
|
* data.
|
|
*/
|
|
switch (smb->pdata->enable_control) {
|
|
case SMB347_CHG_ENABLE_PIN_ACTIVE_LOW:
|
|
val = CFG_PIN_EN_CTRL_ACTIVE_LOW;
|
|
break;
|
|
case SMB347_CHG_ENABLE_PIN_ACTIVE_HIGH:
|
|
val = CFG_PIN_EN_CTRL_ACTIVE_HIGH;
|
|
break;
|
|
default:
|
|
val = 0;
|
|
break;
|
|
}
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL_MASK,
|
|
val);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/* Disable Automatic Power Source Detection (APSD) interrupt. */
|
|
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_APSD_IRQ, 0);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = smb347_update_ps_status(smb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = smb347_start_stop_charging(smb);
|
|
|
|
fail:
|
|
smb347_set_writable(smb, false);
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t smb347_interrupt(int irq, void *data)
|
|
{
|
|
struct smb347_charger *smb = data;
|
|
unsigned int stat_c, irqstat_c, irqstat_d, irqstat_e;
|
|
bool handled = false;
|
|
int ret;
|
|
|
|
ret = regmap_read(smb->regmap, STAT_C, &stat_c);
|
|
if (ret < 0) {
|
|
dev_warn(smb->dev, "reading STAT_C failed\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
ret = regmap_read(smb->regmap, IRQSTAT_C, &irqstat_c);
|
|
if (ret < 0) {
|
|
dev_warn(smb->dev, "reading IRQSTAT_C failed\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
ret = regmap_read(smb->regmap, IRQSTAT_D, &irqstat_d);
|
|
if (ret < 0) {
|
|
dev_warn(smb->dev, "reading IRQSTAT_D failed\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
ret = regmap_read(smb->regmap, IRQSTAT_E, &irqstat_e);
|
|
if (ret < 0) {
|
|
dev_warn(smb->dev, "reading IRQSTAT_E failed\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/*
|
|
* If we get charger error we report the error back to user.
|
|
* If the error is recovered charging will resume again.
|
|
*/
|
|
if (stat_c & STAT_C_CHARGER_ERROR) {
|
|
dev_err(smb->dev, "charging stopped due to charger error\n");
|
|
power_supply_changed(smb->battery);
|
|
handled = true;
|
|
}
|
|
|
|
/*
|
|
* If we reached the termination current the battery is charged and
|
|
* we can update the status now. Charging is automatically
|
|
* disabled by the hardware.
|
|
*/
|
|
if (irqstat_c & (IRQSTAT_C_TERMINATION_IRQ | IRQSTAT_C_TAPER_IRQ)) {
|
|
if (irqstat_c & IRQSTAT_C_TERMINATION_STAT)
|
|
power_supply_changed(smb->battery);
|
|
dev_dbg(smb->dev, "going to HW maintenance mode\n");
|
|
handled = true;
|
|
}
|
|
|
|
/*
|
|
* If we got a charger timeout INT that means the charge
|
|
* full is not detected with in charge timeout value.
|
|
*/
|
|
if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_IRQ) {
|
|
dev_dbg(smb->dev, "total Charge Timeout INT received\n");
|
|
|
|
if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_STAT)
|
|
dev_warn(smb->dev, "charging stopped due to timeout\n");
|
|
power_supply_changed(smb->battery);
|
|
handled = true;
|
|
}
|
|
|
|
/*
|
|
* If we got an under voltage interrupt it means that AC/USB input
|
|
* was connected or disconnected.
|
|
*/
|
|
if (irqstat_e & (IRQSTAT_E_USBIN_UV_IRQ | IRQSTAT_E_DCIN_UV_IRQ)) {
|
|
if (smb347_update_ps_status(smb) > 0) {
|
|
smb347_start_stop_charging(smb);
|
|
if (smb->pdata->use_mains)
|
|
power_supply_changed(smb->mains);
|
|
if (smb->pdata->use_usb)
|
|
power_supply_changed(smb->usb);
|
|
}
|
|
handled = true;
|
|
}
|
|
|
|
return handled ? IRQ_HANDLED : IRQ_NONE;
|
|
}
|
|
|
|
static int smb347_irq_set(struct smb347_charger *smb, bool enable)
|
|
{
|
|
int ret;
|
|
|
|
ret = smb347_set_writable(smb, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Enable/disable interrupts for:
|
|
* - under voltage
|
|
* - termination current reached
|
|
* - charger timeout
|
|
* - charger error
|
|
*/
|
|
ret = regmap_update_bits(smb->regmap, CFG_FAULT_IRQ, 0xff,
|
|
enable ? CFG_FAULT_IRQ_DCIN_UV : 0);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_STATUS_IRQ, 0xff,
|
|
enable ? (CFG_STATUS_IRQ_TERMINATION_OR_TAPER |
|
|
CFG_STATUS_IRQ_CHARGE_TIMEOUT) : 0);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CHARGER_ERROR,
|
|
enable ? CFG_PIN_EN_CHARGER_ERROR : 0);
|
|
fail:
|
|
smb347_set_writable(smb, false);
|
|
return ret;
|
|
}
|
|
|
|
static inline int smb347_irq_enable(struct smb347_charger *smb)
|
|
{
|
|
return smb347_irq_set(smb, true);
|
|
}
|
|
|
|
static inline int smb347_irq_disable(struct smb347_charger *smb)
|
|
{
|
|
return smb347_irq_set(smb, false);
|
|
}
|
|
|
|
static int smb347_irq_init(struct smb347_charger *smb,
|
|
struct i2c_client *client)
|
|
{
|
|
const struct smb347_charger_platform_data *pdata = smb->pdata;
|
|
int ret, irq = gpio_to_irq(pdata->irq_gpio);
|
|
|
|
ret = gpio_request_one(pdata->irq_gpio, GPIOF_IN, client->name);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = request_threaded_irq(irq, NULL, smb347_interrupt,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
client->name, smb);
|
|
if (ret < 0)
|
|
goto fail_gpio;
|
|
|
|
ret = smb347_set_writable(smb, true);
|
|
if (ret < 0)
|
|
goto fail_irq;
|
|
|
|
/*
|
|
* Configure the STAT output to be suitable for interrupts: disable
|
|
* all other output (except interrupts) and make it active low.
|
|
*/
|
|
ret = regmap_update_bits(smb->regmap, CFG_STAT,
|
|
CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED,
|
|
CFG_STAT_DISABLED);
|
|
if (ret < 0)
|
|
goto fail_readonly;
|
|
|
|
smb347_set_writable(smb, false);
|
|
client->irq = irq;
|
|
return 0;
|
|
|
|
fail_readonly:
|
|
smb347_set_writable(smb, false);
|
|
fail_irq:
|
|
free_irq(irq, smb);
|
|
fail_gpio:
|
|
gpio_free(pdata->irq_gpio);
|
|
fail:
|
|
client->irq = 0;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Returns the constant charge current programmed
|
|
* into the charger in uA.
|
|
*/
|
|
static int get_const_charge_current(struct smb347_charger *smb)
|
|
{
|
|
int ret, intval;
|
|
unsigned int v;
|
|
|
|
if (!smb347_is_ps_online(smb))
|
|
return -ENODATA;
|
|
|
|
ret = regmap_read(smb->regmap, STAT_B, &v);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* The current value is composition of FCC and PCC values
|
|
* and we can detect which table to use from bit 5.
|
|
*/
|
|
if (v & 0x20) {
|
|
intval = hw_to_current(fcc_tbl, ARRAY_SIZE(fcc_tbl), v & 7);
|
|
} else {
|
|
v >>= 3;
|
|
intval = hw_to_current(pcc_tbl, ARRAY_SIZE(pcc_tbl), v & 7);
|
|
}
|
|
|
|
return intval;
|
|
}
|
|
|
|
/*
|
|
* Returns the constant charge voltage programmed
|
|
* into the charger in uV.
|
|
*/
|
|
static int get_const_charge_voltage(struct smb347_charger *smb)
|
|
{
|
|
int ret, intval;
|
|
unsigned int v;
|
|
|
|
if (!smb347_is_ps_online(smb))
|
|
return -ENODATA;
|
|
|
|
ret = regmap_read(smb->regmap, STAT_A, &v);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
v &= STAT_A_FLOAT_VOLTAGE_MASK;
|
|
if (v > 0x3d)
|
|
v = 0x3d;
|
|
|
|
intval = 3500000 + v * 20000;
|
|
|
|
return intval;
|
|
}
|
|
|
|
static int smb347_mains_get_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smb347_charger *smb = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = smb->mains_online;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
ret = get_const_charge_voltage(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
ret = get_const_charge_current(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
val->intval = ret;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property smb347_mains_properties[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
|
|
};
|
|
|
|
static int smb347_usb_get_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smb347_charger *smb = power_supply_get_drvdata(psy);
|
|
int ret;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = smb->usb_online;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
ret = get_const_charge_voltage(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
ret = get_const_charge_current(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
val->intval = ret;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property smb347_usb_properties[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
|
|
};
|
|
|
|
static int smb347_get_charging_status(struct smb347_charger *smb)
|
|
{
|
|
int ret, status;
|
|
unsigned int val;
|
|
|
|
if (!smb347_is_ps_online(smb))
|
|
return POWER_SUPPLY_STATUS_DISCHARGING;
|
|
|
|
ret = regmap_read(smb->regmap, STAT_C, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if ((val & STAT_C_CHARGER_ERROR) ||
|
|
(val & STAT_C_HOLDOFF_STAT)) {
|
|
/*
|
|
* set to NOT CHARGING upon charger error
|
|
* or charging has stopped.
|
|
*/
|
|
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
} else {
|
|
if ((val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT) {
|
|
/*
|
|
* set to charging if battery is in pre-charge,
|
|
* fast charge or taper charging mode.
|
|
*/
|
|
status = POWER_SUPPLY_STATUS_CHARGING;
|
|
} else if (val & STAT_C_CHG_TERM) {
|
|
/*
|
|
* set the status to FULL if battery is not in pre
|
|
* charge, fast charge or taper charging mode AND
|
|
* charging is terminated at least once.
|
|
*/
|
|
status = POWER_SUPPLY_STATUS_FULL;
|
|
} else {
|
|
/*
|
|
* in this case no charger error or termination
|
|
* occured but charging is not in progress!!!
|
|
*/
|
|
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static int smb347_battery_get_property(struct power_supply *psy,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smb347_charger *smb = power_supply_get_drvdata(psy);
|
|
const struct smb347_charger_platform_data *pdata = smb->pdata;
|
|
int ret;
|
|
|
|
ret = smb347_update_ps_status(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
ret = smb347_get_charging_status(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = ret;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
|
if (!smb347_is_ps_online(smb))
|
|
return -ENODATA;
|
|
|
|
/*
|
|
* We handle trickle and pre-charging the same, and taper
|
|
* and none the same.
|
|
*/
|
|
switch (smb347_charging_status(smb)) {
|
|
case 1:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
|
|
break;
|
|
case 2:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
|
|
break;
|
|
default:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
val->intval = pdata->battery_info.technology;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
|
|
val->intval = pdata->battery_info.voltage_min_design;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
|
|
val->intval = pdata->battery_info.voltage_max_design;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
|
val->intval = pdata->battery_info.charge_full_design;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
|
val->strval = pdata->battery_info.name;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property smb347_battery_properties[] = {
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
|
POWER_SUPPLY_PROP_TECHNOLOGY,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
|
POWER_SUPPLY_PROP_MODEL_NAME,
|
|
};
|
|
|
|
static bool smb347_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case IRQSTAT_A:
|
|
case IRQSTAT_C:
|
|
case IRQSTAT_E:
|
|
case IRQSTAT_F:
|
|
case STAT_A:
|
|
case STAT_B:
|
|
case STAT_C:
|
|
case STAT_E:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool smb347_readable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case CFG_CHARGE_CURRENT:
|
|
case CFG_CURRENT_LIMIT:
|
|
case CFG_FLOAT_VOLTAGE:
|
|
case CFG_STAT:
|
|
case CFG_PIN:
|
|
case CFG_THERM:
|
|
case CFG_SYSOK:
|
|
case CFG_OTHER:
|
|
case CFG_OTG:
|
|
case CFG_TEMP_LIMIT:
|
|
case CFG_FAULT_IRQ:
|
|
case CFG_STATUS_IRQ:
|
|
case CFG_ADDRESS:
|
|
case CMD_A:
|
|
case CMD_B:
|
|
case CMD_C:
|
|
return true;
|
|
}
|
|
|
|
return smb347_volatile_reg(dev, reg);
|
|
}
|
|
|
|
static const struct regmap_config smb347_regmap = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = SMB347_MAX_REGISTER,
|
|
.volatile_reg = smb347_volatile_reg,
|
|
.readable_reg = smb347_readable_reg,
|
|
};
|
|
|
|
static const struct power_supply_desc smb347_mains_desc = {
|
|
.name = "smb347-mains",
|
|
.type = POWER_SUPPLY_TYPE_MAINS,
|
|
.get_property = smb347_mains_get_property,
|
|
.properties = smb347_mains_properties,
|
|
.num_properties = ARRAY_SIZE(smb347_mains_properties),
|
|
};
|
|
|
|
static const struct power_supply_desc smb347_usb_desc = {
|
|
.name = "smb347-usb",
|
|
.type = POWER_SUPPLY_TYPE_USB,
|
|
.get_property = smb347_usb_get_property,
|
|
.properties = smb347_usb_properties,
|
|
.num_properties = ARRAY_SIZE(smb347_usb_properties),
|
|
};
|
|
|
|
static const struct power_supply_desc smb347_battery_desc = {
|
|
.name = "smb347-battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.get_property = smb347_battery_get_property,
|
|
.properties = smb347_battery_properties,
|
|
.num_properties = ARRAY_SIZE(smb347_battery_properties),
|
|
};
|
|
|
|
static int smb347_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
static char *battery[] = { "smb347-battery" };
|
|
const struct smb347_charger_platform_data *pdata;
|
|
struct power_supply_config mains_usb_cfg = {}, battery_cfg = {};
|
|
struct device *dev = &client->dev;
|
|
struct smb347_charger *smb;
|
|
int ret;
|
|
|
|
pdata = dev->platform_data;
|
|
if (!pdata)
|
|
return -EINVAL;
|
|
|
|
if (!pdata->use_mains && !pdata->use_usb)
|
|
return -EINVAL;
|
|
|
|
smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL);
|
|
if (!smb)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, smb);
|
|
|
|
mutex_init(&smb->lock);
|
|
smb->dev = &client->dev;
|
|
smb->pdata = pdata;
|
|
|
|
smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap);
|
|
if (IS_ERR(smb->regmap))
|
|
return PTR_ERR(smb->regmap);
|
|
|
|
ret = smb347_hw_init(smb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
mains_usb_cfg.supplied_to = battery;
|
|
mains_usb_cfg.num_supplicants = ARRAY_SIZE(battery);
|
|
mains_usb_cfg.drv_data = smb;
|
|
if (smb->pdata->use_mains) {
|
|
smb->mains = power_supply_register(dev, &smb347_mains_desc,
|
|
&mains_usb_cfg);
|
|
if (IS_ERR(smb->mains))
|
|
return PTR_ERR(smb->mains);
|
|
}
|
|
|
|
if (smb->pdata->use_usb) {
|
|
smb->usb = power_supply_register(dev, &smb347_usb_desc,
|
|
&mains_usb_cfg);
|
|
if (IS_ERR(smb->usb)) {
|
|
if (smb->pdata->use_mains)
|
|
power_supply_unregister(smb->mains);
|
|
return PTR_ERR(smb->usb);
|
|
}
|
|
}
|
|
|
|
battery_cfg.drv_data = smb;
|
|
smb->battery = power_supply_register(dev, &smb347_battery_desc,
|
|
&battery_cfg);
|
|
if (IS_ERR(smb->battery)) {
|
|
if (smb->pdata->use_usb)
|
|
power_supply_unregister(smb->usb);
|
|
if (smb->pdata->use_mains)
|
|
power_supply_unregister(smb->mains);
|
|
return PTR_ERR(smb->battery);
|
|
}
|
|
|
|
/*
|
|
* Interrupt pin is optional. If it is connected, we setup the
|
|
* interrupt support here.
|
|
*/
|
|
if (pdata->irq_gpio >= 0) {
|
|
ret = smb347_irq_init(smb, client);
|
|
if (ret < 0) {
|
|
dev_warn(dev, "failed to initialize IRQ: %d\n", ret);
|
|
dev_warn(dev, "disabling IRQ support\n");
|
|
} else {
|
|
smb347_irq_enable(smb);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smb347_remove(struct i2c_client *client)
|
|
{
|
|
struct smb347_charger *smb = i2c_get_clientdata(client);
|
|
|
|
if (client->irq) {
|
|
smb347_irq_disable(smb);
|
|
free_irq(client->irq, smb);
|
|
gpio_free(smb->pdata->irq_gpio);
|
|
}
|
|
|
|
power_supply_unregister(smb->battery);
|
|
if (smb->pdata->use_usb)
|
|
power_supply_unregister(smb->usb);
|
|
if (smb->pdata->use_mains)
|
|
power_supply_unregister(smb->mains);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id smb347_id[] = {
|
|
{ "smb347", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, smb347_id);
|
|
|
|
static struct i2c_driver smb347_driver = {
|
|
.driver = {
|
|
.name = "smb347",
|
|
},
|
|
.probe = smb347_probe,
|
|
.remove = smb347_remove,
|
|
.id_table = smb347_id,
|
|
};
|
|
|
|
module_i2c_driver(smb347_driver);
|
|
|
|
MODULE_AUTHOR("Bruce E. Robertson <bruce.e.robertson@intel.com>");
|
|
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
|
|
MODULE_DESCRIPTION("SMB347 battery charger driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("i2c:smb347");
|