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OpenCloudOS-Kernel/include/linux/mfd/abx500/ux500_chargalg.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 Based on 1 normalized pattern(s): license terms gnu general public license gpl version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 161 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-29 00:57:21 +08:00
/* SPDX-License-Identifier: GPL-2.0-only */
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
/*
* Copyright (C) ST-Ericsson SA 2012
* Author: Johan Gardsmark <johan.gardsmark@stericsson.com> for ST-Ericsson.
*/
#ifndef _UX500_CHARGALG_H
#define _UX500_CHARGALG_H
#include <linux/power_supply.h>
power_supply: Change ownership from driver to core 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>
2015-03-12 15:44:11 +08:00
/*
* Valid only for supplies of type:
* - POWER_SUPPLY_TYPE_MAINS,
* - POWER_SUPPLY_TYPE_USB,
* because only them store as drv_data pointer to struct ux500_charger.
*/
#define psy_to_ux500_charger(x) power_supply_get_drvdata(psy)
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
/* Forward declaration */
struct ux500_charger;
struct ux500_charger_ops {
int (*enable) (struct ux500_charger *, int, int, int);
ab8500-bm: Quick re-attach charging behaviour Due to a bug in some AB8500 ASICs charger removal cannot always be detected if the removal and reinsertion is done to close in time. This patch detects above described case and handles the situation so that charging will be kept turned on. Signed-off-by: Lee Jones <lee.jones@linaro.org>
2013-02-14 17:24:10 +08:00
int (*check_enable) (struct ux500_charger *, int, int);
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
int (*kick_wd) (struct ux500_charger *);
int (*update_curr) (struct ux500_charger *, int);
};
/**
* struct ux500_charger - power supply ux500 charger sub class
* @psy power supply base class
* @ops ux500 charger operations
* @max_out_volt maximum output charger voltage in mV
* @max_out_curr maximum output charger current in mA
pm2301: Provide u9540 support for the pm2301 charger AC charger driver for the DB9540 based platforms. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com> Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>
2012-04-26 16:00:04 +08:00
* @enabled indicates if this charger is used or not
pm2301: Update watchdog for pm2xxx support AB and PMxxx doesn't have same watchdog refresh period. Add watchdog to refresh period parameters in x500 charger structure, this should kick watchdog every 30sec. The AC charging should also kick both pm2xxx and the AB charger watchdog. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com> Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com> Tested-by: Jonas ABERG <jonas.aberg@stericsson.com>
2012-05-10 21:33:56 +08:00
* @external external charger unit (pm2xxx)
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
*/
struct ux500_charger {
power_supply: Change ownership from driver to core 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>
2015-03-12 15:44:11 +08:00
struct power_supply *psy;
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
struct ux500_charger_ops ops;
int max_out_volt;
int max_out_curr;
pm2301: Update watchdog for pm2xxx support AB and PMxxx doesn't have same watchdog refresh period. Add watchdog to refresh period parameters in x500 charger structure, this should kick watchdog every 30sec. The AC charging should also kick both pm2xxx and the AB charger watchdog. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com> Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com> Tested-by: Jonas ABERG <jonas.aberg@stericsson.com>
2012-05-10 21:33:56 +08:00
int wdt_refresh;
pm2301: Provide u9540 support for the pm2301 charger AC charger driver for the DB9540 based platforms. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com> Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>
2012-04-26 16:00:04 +08:00
bool enabled;
pm2301: Update watchdog for pm2xxx support AB and PMxxx doesn't have same watchdog refresh period. Add watchdog to refresh period parameters in x500 charger structure, this should kick watchdog every 30sec. The AC charging should also kick both pm2xxx and the AB charger watchdog. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com> Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com> Tested-by: Jonas ABERG <jonas.aberg@stericsson.com>
2012-05-10 21:33:56 +08:00
bool external;
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
};
ab8500-bm: Charge only mode fixes for the ab9540 Fix for charging not getting enabled in charge only mode by external charger. Signed-off-by: Lee Jones <lee.jones@linaro.org>
2013-02-13 19:39:19 +08:00
extern struct blocking_notifier_head charger_notifier_list;
abx500-chargalg: Add abx500 charging algorithm This is a charging algorithm driver for abx500 variants. It is the central entity for battery driver and is responsible for charging and monitoring the battery driver. It is a hardware independant driver and also monitors other abx500 power supply devices. Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-01 00:24:25 +08:00
#endif