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1314 lines
38 KiB
1314 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* battery.c - ACPI Battery Driver (Revision: 2.0) |
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* |
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* Copyright (C) 2007 Alexey Starikovskiy <[email protected]> |
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* Copyright (C) 2004-2007 Vladimir Lebedev <[email protected]> |
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* Copyright (C) 2001, 2002 Andy Grover <[email protected]> |
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) "ACPI: battery: " fmt |
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|
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#include <linux/async.h> |
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#include <linux/delay.h> |
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#include <linux/dmi.h> |
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#include <linux/jiffies.h> |
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#include <linux/kernel.h> |
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/slab.h> |
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#include <linux/suspend.h> |
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#include <linux/types.h> |
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#include <asm/unaligned.h> |
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|
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#include <linux/acpi.h> |
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#include <linux/power_supply.h> |
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#include <acpi/battery.h> |
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|
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#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
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#define ACPI_BATTERY_CAPACITY_VALID(capacity) \ |
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((capacity) != 0 && (capacity) != ACPI_BATTERY_VALUE_UNKNOWN) |
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#define ACPI_BATTERY_DEVICE_NAME "Battery" |
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|
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/* Battery power unit: 0 means mW, 1 means mA */ |
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#define ACPI_BATTERY_POWER_UNIT_MA 1 |
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|
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#define ACPI_BATTERY_STATE_DISCHARGING 0x1 |
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#define ACPI_BATTERY_STATE_CHARGING 0x2 |
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#define ACPI_BATTERY_STATE_CRITICAL 0x4 |
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MODULE_AUTHOR("Paul Diefenbaugh"); |
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MODULE_AUTHOR("Alexey Starikovskiy <[email protected]>"); |
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MODULE_DESCRIPTION("ACPI Battery Driver"); |
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MODULE_LICENSE("GPL"); |
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static async_cookie_t async_cookie; |
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static bool battery_driver_registered; |
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static int battery_bix_broken_package; |
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static int battery_notification_delay_ms; |
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static int battery_ac_is_broken; |
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static int battery_check_pmic = 1; |
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static unsigned int cache_time = 1000; |
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module_param(cache_time, uint, 0644); |
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MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
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|
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static const struct acpi_device_id battery_device_ids[] = { |
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{"PNP0C0A", 0}, |
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{"", 0}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
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|
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/* Lists of PMIC ACPI HIDs with an (often better) native battery driver */ |
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static const char * const acpi_battery_blacklist[] = { |
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"INT33F4", /* X-Powers AXP288 PMIC */ |
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}; |
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enum { |
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ACPI_BATTERY_ALARM_PRESENT, |
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ACPI_BATTERY_XINFO_PRESENT, |
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ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
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/* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
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switches between mWh and mAh depending on whether the system |
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is running on battery or not. When mAh is the unit, most |
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reported values are incorrect and need to be adjusted by |
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10000/design_voltage. Verified on x201, t410, t410s, and x220. |
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Pre-2010 and 2012 models appear to always report in mWh and |
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are thus unaffected (tested with t42, t61, t500, x200, x300, |
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and x230). Also, in mid-2012 Lenovo issued a BIOS update for |
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the 2011 models that fixes the issue (tested on x220 with a |
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post-1.29 BIOS), but as of Nov. 2012, no such update is |
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available for the 2010 models. */ |
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ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
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/* for batteries reporting current capacity with design capacity |
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* on a full charge, but showing degradation in full charge cap. |
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*/ |
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ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, |
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}; |
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struct acpi_battery { |
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struct mutex lock; |
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struct mutex sysfs_lock; |
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struct power_supply *bat; |
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struct power_supply_desc bat_desc; |
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struct acpi_device *device; |
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struct notifier_block pm_nb; |
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struct list_head list; |
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unsigned long update_time; |
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int revision; |
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int rate_now; |
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int capacity_now; |
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int voltage_now; |
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int design_capacity; |
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int full_charge_capacity; |
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int technology; |
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int design_voltage; |
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int design_capacity_warning; |
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int design_capacity_low; |
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int cycle_count; |
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int measurement_accuracy; |
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int max_sampling_time; |
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int min_sampling_time; |
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int max_averaging_interval; |
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int min_averaging_interval; |
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int capacity_granularity_1; |
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int capacity_granularity_2; |
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int alarm; |
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char model_number[32]; |
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char serial_number[32]; |
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char type[32]; |
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char oem_info[32]; |
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int state; |
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int power_unit; |
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unsigned long flags; |
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}; |
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#define to_acpi_battery(x) power_supply_get_drvdata(x) |
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|
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static inline int acpi_battery_present(struct acpi_battery *battery) |
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{ |
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return battery->device->status.battery_present; |
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} |
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static int acpi_battery_technology(struct acpi_battery *battery) |
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{ |
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if (!strcasecmp("NiCd", battery->type)) |
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return POWER_SUPPLY_TECHNOLOGY_NiCd; |
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if (!strcasecmp("NiMH", battery->type)) |
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return POWER_SUPPLY_TECHNOLOGY_NiMH; |
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if (!strcasecmp("LION", battery->type)) |
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return POWER_SUPPLY_TECHNOLOGY_LION; |
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if (!strncasecmp("LI-ION", battery->type, 6)) |
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return POWER_SUPPLY_TECHNOLOGY_LION; |
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if (!strcasecmp("LiP", battery->type)) |
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return POWER_SUPPLY_TECHNOLOGY_LIPO; |
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return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
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} |
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static int acpi_battery_get_state(struct acpi_battery *battery); |
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static int acpi_battery_is_charged(struct acpi_battery *battery) |
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{ |
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/* charging, discharging or critical low */ |
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if (battery->state != 0) |
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return 0; |
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|
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/* battery not reporting charge */ |
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if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
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battery->capacity_now == 0) |
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return 0; |
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/* good batteries update full_charge as the batteries degrade */ |
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if (battery->full_charge_capacity == battery->capacity_now) |
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return 1; |
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|
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/* fallback to using design values for broken batteries */ |
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if (battery->design_capacity == battery->capacity_now) |
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return 1; |
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|
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/* we don't do any sort of metric based on percentages */ |
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return 0; |
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} |
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static bool acpi_battery_is_degraded(struct acpi_battery *battery) |
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{ |
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return ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && |
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ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity) && |
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battery->full_charge_capacity < battery->design_capacity; |
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} |
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static int acpi_battery_handle_discharging(struct acpi_battery *battery) |
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{ |
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/* |
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* Some devices wrongly report discharging if the battery's charge level |
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* was above the device's start charging threshold atm the AC adapter |
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* was plugged in and the device thus did not start a new charge cycle. |
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*/ |
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if ((battery_ac_is_broken || power_supply_is_system_supplied()) && |
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battery->rate_now == 0) |
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return POWER_SUPPLY_STATUS_NOT_CHARGING; |
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return POWER_SUPPLY_STATUS_DISCHARGING; |
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} |
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static int acpi_battery_get_property(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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int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0; |
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struct acpi_battery *battery = to_acpi_battery(psy); |
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|
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if (acpi_battery_present(battery)) { |
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/* run battery update only if it is present */ |
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acpi_battery_get_state(battery); |
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} else if (psp != POWER_SUPPLY_PROP_PRESENT) |
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return -ENODEV; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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if (battery->state & ACPI_BATTERY_STATE_DISCHARGING) |
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val->intval = acpi_battery_handle_discharging(battery); |
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else if (battery->state & ACPI_BATTERY_STATE_CHARGING) |
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val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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else if (acpi_battery_is_charged(battery)) |
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val->intval = POWER_SUPPLY_STATUS_FULL; |
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else |
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
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break; |
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case POWER_SUPPLY_PROP_PRESENT: |
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val->intval = acpi_battery_present(battery); |
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break; |
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case POWER_SUPPLY_PROP_TECHNOLOGY: |
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val->intval = acpi_battery_technology(battery); |
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break; |
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case POWER_SUPPLY_PROP_CYCLE_COUNT: |
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val->intval = battery->cycle_count; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
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if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
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ret = -ENODEV; |
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else |
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val->intval = battery->design_voltage * 1000; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
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ret = -ENODEV; |
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else |
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val->intval = battery->voltage_now * 1000; |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_NOW: |
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case POWER_SUPPLY_PROP_POWER_NOW: |
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if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
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ret = -ENODEV; |
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else |
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val->intval = battery->rate_now * 1000; |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
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case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
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if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) |
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ret = -ENODEV; |
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else |
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val->intval = battery->design_capacity * 1000; |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_FULL: |
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case POWER_SUPPLY_PROP_ENERGY_FULL: |
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if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
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ret = -ENODEV; |
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else |
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val->intval = battery->full_charge_capacity * 1000; |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_NOW: |
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case POWER_SUPPLY_PROP_ENERGY_NOW: |
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if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
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ret = -ENODEV; |
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else |
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val->intval = battery->capacity_now * 1000; |
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break; |
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case POWER_SUPPLY_PROP_CAPACITY: |
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if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity)) |
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full_capacity = battery->full_charge_capacity; |
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else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) |
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full_capacity = battery->design_capacity; |
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if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || |
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full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
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ret = -ENODEV; |
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else |
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val->intval = battery->capacity_now * 100/ |
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full_capacity; |
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break; |
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case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
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if (battery->state & ACPI_BATTERY_STATE_CRITICAL) |
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
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else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && |
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(battery->capacity_now <= battery->alarm)) |
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
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else if (acpi_battery_is_charged(battery)) |
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
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else |
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
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break; |
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case POWER_SUPPLY_PROP_MODEL_NAME: |
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val->strval = battery->model_number; |
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break; |
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case POWER_SUPPLY_PROP_MANUFACTURER: |
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val->strval = battery->oem_info; |
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break; |
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case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
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val->strval = battery->serial_number; |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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static enum power_supply_property charge_battery_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_CYCLE_COUNT, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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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_FULL_DESIGN, |
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POWER_SUPPLY_PROP_CHARGE_FULL, |
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POWER_SUPPLY_PROP_CHARGE_NOW, |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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}; |
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static enum power_supply_property charge_battery_full_cap_broken_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_CYCLE_COUNT, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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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_NOW, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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}; |
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static enum power_supply_property energy_battery_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_CYCLE_COUNT, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_POWER_NOW, |
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POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
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POWER_SUPPLY_PROP_ENERGY_FULL, |
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POWER_SUPPLY_PROP_ENERGY_NOW, |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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}; |
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static enum power_supply_property energy_battery_full_cap_broken_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_CYCLE_COUNT, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_POWER_NOW, |
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POWER_SUPPLY_PROP_ENERGY_NOW, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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}; |
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/* -------------------------------------------------------------------------- |
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Battery Management |
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-------------------------------------------------------------------------- */ |
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struct acpi_offsets { |
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size_t offset; /* offset inside struct acpi_sbs_battery */ |
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u8 mode; /* int or string? */ |
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}; |
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|
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static const struct acpi_offsets state_offsets[] = { |
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{offsetof(struct acpi_battery, state), 0}, |
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{offsetof(struct acpi_battery, rate_now), 0}, |
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{offsetof(struct acpi_battery, capacity_now), 0}, |
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{offsetof(struct acpi_battery, voltage_now), 0}, |
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}; |
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static const struct acpi_offsets info_offsets[] = { |
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{offsetof(struct acpi_battery, power_unit), 0}, |
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{offsetof(struct acpi_battery, design_capacity), 0}, |
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{offsetof(struct acpi_battery, full_charge_capacity), 0}, |
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{offsetof(struct acpi_battery, technology), 0}, |
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{offsetof(struct acpi_battery, design_voltage), 0}, |
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{offsetof(struct acpi_battery, design_capacity_warning), 0}, |
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{offsetof(struct acpi_battery, design_capacity_low), 0}, |
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{offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
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{offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
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{offsetof(struct acpi_battery, model_number), 1}, |
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{offsetof(struct acpi_battery, serial_number), 1}, |
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{offsetof(struct acpi_battery, type), 1}, |
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{offsetof(struct acpi_battery, oem_info), 1}, |
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}; |
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|
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static const struct acpi_offsets extended_info_offsets[] = { |
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{offsetof(struct acpi_battery, revision), 0}, |
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{offsetof(struct acpi_battery, power_unit), 0}, |
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{offsetof(struct acpi_battery, design_capacity), 0}, |
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{offsetof(struct acpi_battery, full_charge_capacity), 0}, |
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{offsetof(struct acpi_battery, technology), 0}, |
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{offsetof(struct acpi_battery, design_voltage), 0}, |
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{offsetof(struct acpi_battery, design_capacity_warning), 0}, |
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{offsetof(struct acpi_battery, design_capacity_low), 0}, |
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{offsetof(struct acpi_battery, cycle_count), 0}, |
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{offsetof(struct acpi_battery, measurement_accuracy), 0}, |
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{offsetof(struct acpi_battery, max_sampling_time), 0}, |
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{offsetof(struct acpi_battery, min_sampling_time), 0}, |
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{offsetof(struct acpi_battery, max_averaging_interval), 0}, |
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{offsetof(struct acpi_battery, min_averaging_interval), 0}, |
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{offsetof(struct acpi_battery, capacity_granularity_1), 0}, |
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{offsetof(struct acpi_battery, capacity_granularity_2), 0}, |
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{offsetof(struct acpi_battery, model_number), 1}, |
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{offsetof(struct acpi_battery, serial_number), 1}, |
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{offsetof(struct acpi_battery, type), 1}, |
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{offsetof(struct acpi_battery, oem_info), 1}, |
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}; |
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|
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static int extract_package(struct acpi_battery *battery, |
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union acpi_object *package, |
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const struct acpi_offsets *offsets, int num) |
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{ |
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int i; |
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union acpi_object *element; |
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if (package->type != ACPI_TYPE_PACKAGE) |
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return -EFAULT; |
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for (i = 0; i < num; ++i) { |
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if (package->package.count <= i) |
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return -EFAULT; |
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element = &package->package.elements[i]; |
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if (offsets[i].mode) { |
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u8 *ptr = (u8 *)battery + offsets[i].offset; |
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if (element->type == ACPI_TYPE_STRING || |
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element->type == ACPI_TYPE_BUFFER) |
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strncpy(ptr, element->string.pointer, 32); |
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else if (element->type == ACPI_TYPE_INTEGER) { |
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strncpy(ptr, (u8 *)&element->integer.value, |
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sizeof(u64)); |
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ptr[sizeof(u64)] = 0; |
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} else |
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*ptr = 0; /* don't have value */ |
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} else { |
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int *x = (int *)((u8 *)battery + offsets[i].offset); |
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*x = (element->type == ACPI_TYPE_INTEGER) ? |
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element->integer.value : -1; |
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} |
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} |
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return 0; |
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} |
|
|
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static int acpi_battery_get_status(struct acpi_battery *battery) |
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{ |
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if (acpi_bus_get_status(battery->device)) { |
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acpi_handle_info(battery->device->handle, |
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"_STA evaluation failed\n"); |
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return -ENODEV; |
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} |
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return 0; |
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} |
|
|
|
|
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static int extract_battery_info(const int use_bix, |
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struct acpi_battery *battery, |
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const struct acpi_buffer *buffer) |
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{ |
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int result = -EFAULT; |
|
|
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if (use_bix && battery_bix_broken_package) |
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result = extract_package(battery, buffer->pointer, |
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extended_info_offsets + 1, |
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ARRAY_SIZE(extended_info_offsets) - 1); |
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else if (use_bix) |
|
result = extract_package(battery, buffer->pointer, |
|
extended_info_offsets, |
|
ARRAY_SIZE(extended_info_offsets)); |
|
else |
|
result = extract_package(battery, buffer->pointer, |
|
info_offsets, ARRAY_SIZE(info_offsets)); |
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
|
battery->full_charge_capacity = battery->design_capacity; |
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
|
battery->power_unit && battery->design_voltage) { |
|
battery->design_capacity = battery->design_capacity * |
|
10000 / battery->design_voltage; |
|
battery->full_charge_capacity = battery->full_charge_capacity * |
|
10000 / battery->design_voltage; |
|
battery->design_capacity_warning = |
|
battery->design_capacity_warning * |
|
10000 / battery->design_voltage; |
|
/* Curiously, design_capacity_low, unlike the rest of them, |
|
is correct. */ |
|
/* capacity_granularity_* equal 1 on the systems tested, so |
|
it's impossible to tell if they would need an adjustment |
|
or not if their values were higher. */ |
|
} |
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
|
battery->capacity_now > battery->full_charge_capacity) |
|
battery->capacity_now = battery->full_charge_capacity; |
|
|
|
return result; |
|
} |
|
|
|
static int acpi_battery_get_info(struct acpi_battery *battery) |
|
{ |
|
const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
|
int use_bix; |
|
int result = -ENODEV; |
|
|
|
if (!acpi_battery_present(battery)) |
|
return 0; |
|
|
|
|
|
for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) { |
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
|
acpi_status status = AE_ERROR; |
|
|
|
mutex_lock(&battery->lock); |
|
status = acpi_evaluate_object(battery->device->handle, |
|
use_bix ? "_BIX":"_BIF", |
|
NULL, &buffer); |
|
mutex_unlock(&battery->lock); |
|
|
|
if (ACPI_FAILURE(status)) { |
|
acpi_handle_info(battery->device->handle, |
|
"%s evaluation failed: %s\n", |
|
use_bix ?"_BIX":"_BIF", |
|
acpi_format_exception(status)); |
|
} else { |
|
result = extract_battery_info(use_bix, |
|
battery, |
|
&buffer); |
|
|
|
kfree(buffer.pointer); |
|
break; |
|
} |
|
} |
|
|
|
if (!result && !use_bix && xinfo) |
|
pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n"); |
|
|
|
return result; |
|
} |
|
|
|
static int acpi_battery_get_state(struct acpi_battery *battery) |
|
{ |
|
int result = 0; |
|
acpi_status status = 0; |
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
|
|
|
if (!acpi_battery_present(battery)) |
|
return 0; |
|
|
|
if (battery->update_time && |
|
time_before(jiffies, battery->update_time + |
|
msecs_to_jiffies(cache_time))) |
|
return 0; |
|
|
|
mutex_lock(&battery->lock); |
|
status = acpi_evaluate_object(battery->device->handle, "_BST", |
|
NULL, &buffer); |
|
mutex_unlock(&battery->lock); |
|
|
|
if (ACPI_FAILURE(status)) { |
|
acpi_handle_info(battery->device->handle, |
|
"_BST evaluation failed: %s", |
|
acpi_format_exception(status)); |
|
return -ENODEV; |
|
} |
|
|
|
result = extract_package(battery, buffer.pointer, |
|
state_offsets, ARRAY_SIZE(state_offsets)); |
|
battery->update_time = jiffies; |
|
kfree(buffer.pointer); |
|
|
|
/* For buggy DSDTs that report negative 16-bit values for either |
|
* charging or discharging current and/or report 0 as 65536 |
|
* due to bad math. |
|
*/ |
|
if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && |
|
battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && |
|
(s16)(battery->rate_now) < 0) { |
|
battery->rate_now = abs((s16)battery->rate_now); |
|
pr_warn_once(FW_BUG "(dis)charge rate invalid.\n"); |
|
} |
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
|
&& battery->capacity_now >= 0 && battery->capacity_now <= 100) |
|
battery->capacity_now = (battery->capacity_now * |
|
battery->full_charge_capacity) / 100; |
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
|
battery->power_unit && battery->design_voltage) { |
|
battery->capacity_now = battery->capacity_now * |
|
10000 / battery->design_voltage; |
|
} |
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) && |
|
battery->capacity_now > battery->full_charge_capacity) |
|
battery->capacity_now = battery->full_charge_capacity; |
|
|
|
return result; |
|
} |
|
|
|
static int acpi_battery_set_alarm(struct acpi_battery *battery) |
|
{ |
|
acpi_status status = 0; |
|
|
|
if (!acpi_battery_present(battery) || |
|
!test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
|
return -ENODEV; |
|
|
|
mutex_lock(&battery->lock); |
|
status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
|
battery->alarm); |
|
mutex_unlock(&battery->lock); |
|
|
|
if (ACPI_FAILURE(status)) |
|
return -ENODEV; |
|
|
|
acpi_handle_debug(battery->device->handle, "Alarm set to %d\n", |
|
battery->alarm); |
|
|
|
return 0; |
|
} |
|
|
|
static int acpi_battery_init_alarm(struct acpi_battery *battery) |
|
{ |
|
/* See if alarms are supported, and if so, set default */ |
|
if (!acpi_has_method(battery->device->handle, "_BTP")) { |
|
clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
|
return 0; |
|
} |
|
set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
|
if (!battery->alarm) |
|
battery->alarm = battery->design_capacity_warning; |
|
return acpi_battery_set_alarm(battery); |
|
} |
|
|
|
static ssize_t acpi_battery_alarm_show(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
|
return sprintf(buf, "%d\n", battery->alarm * 1000); |
|
} |
|
|
|
static ssize_t acpi_battery_alarm_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned long x; |
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
|
if (sscanf(buf, "%lu\n", &x) == 1) |
|
battery->alarm = x/1000; |
|
if (acpi_battery_present(battery)) |
|
acpi_battery_set_alarm(battery); |
|
return count; |
|
} |
|
|
|
static const struct device_attribute alarm_attr = { |
|
.attr = {.name = "alarm", .mode = 0644}, |
|
.show = acpi_battery_alarm_show, |
|
.store = acpi_battery_alarm_store, |
|
}; |
|
|
|
/* |
|
* The Battery Hooking API |
|
* |
|
* This API is used inside other drivers that need to expose |
|
* platform-specific behaviour within the generic driver in a |
|
* generic way. |
|
* |
|
*/ |
|
|
|
static LIST_HEAD(acpi_battery_list); |
|
static LIST_HEAD(battery_hook_list); |
|
static DEFINE_MUTEX(hook_mutex); |
|
|
|
static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock) |
|
{ |
|
struct acpi_battery *battery; |
|
/* |
|
* In order to remove a hook, we first need to |
|
* de-register all the batteries that are registered. |
|
*/ |
|
if (lock) |
|
mutex_lock(&hook_mutex); |
|
list_for_each_entry(battery, &acpi_battery_list, list) { |
|
hook->remove_battery(battery->bat); |
|
} |
|
list_del(&hook->list); |
|
if (lock) |
|
mutex_unlock(&hook_mutex); |
|
pr_info("extension unregistered: %s\n", hook->name); |
|
} |
|
|
|
void battery_hook_unregister(struct acpi_battery_hook *hook) |
|
{ |
|
__battery_hook_unregister(hook, 1); |
|
} |
|
EXPORT_SYMBOL_GPL(battery_hook_unregister); |
|
|
|
void battery_hook_register(struct acpi_battery_hook *hook) |
|
{ |
|
struct acpi_battery *battery; |
|
|
|
mutex_lock(&hook_mutex); |
|
INIT_LIST_HEAD(&hook->list); |
|
list_add(&hook->list, &battery_hook_list); |
|
/* |
|
* Now that the driver is registered, we need |
|
* to notify the hook that a battery is available |
|
* for each battery, so that the driver may add |
|
* its attributes. |
|
*/ |
|
list_for_each_entry(battery, &acpi_battery_list, list) { |
|
if (hook->add_battery(battery->bat)) { |
|
/* |
|
* If a add-battery returns non-zero, |
|
* the registration of the extension has failed, |
|
* and we will not add it to the list of loaded |
|
* hooks. |
|
*/ |
|
pr_err("extension failed to load: %s", hook->name); |
|
__battery_hook_unregister(hook, 0); |
|
goto end; |
|
} |
|
} |
|
pr_info("new extension: %s\n", hook->name); |
|
end: |
|
mutex_unlock(&hook_mutex); |
|
} |
|
EXPORT_SYMBOL_GPL(battery_hook_register); |
|
|
|
/* |
|
* This function gets called right after the battery sysfs |
|
* attributes have been added, so that the drivers that |
|
* define custom sysfs attributes can add their own. |
|
*/ |
|
static void battery_hook_add_battery(struct acpi_battery *battery) |
|
{ |
|
struct acpi_battery_hook *hook_node, *tmp; |
|
|
|
mutex_lock(&hook_mutex); |
|
INIT_LIST_HEAD(&battery->list); |
|
list_add(&battery->list, &acpi_battery_list); |
|
/* |
|
* Since we added a new battery to the list, we need to |
|
* iterate over the hooks and call add_battery for each |
|
* hook that was registered. This usually happens |
|
* when a battery gets hotplugged or initialized |
|
* during the battery module initialization. |
|
*/ |
|
list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) { |
|
if (hook_node->add_battery(battery->bat)) { |
|
/* |
|
* The notification of the extensions has failed, to |
|
* prevent further errors we will unload the extension. |
|
*/ |
|
pr_err("error in extension, unloading: %s", |
|
hook_node->name); |
|
__battery_hook_unregister(hook_node, 0); |
|
} |
|
} |
|
mutex_unlock(&hook_mutex); |
|
} |
|
|
|
static void battery_hook_remove_battery(struct acpi_battery *battery) |
|
{ |
|
struct acpi_battery_hook *hook; |
|
|
|
mutex_lock(&hook_mutex); |
|
/* |
|
* Before removing the hook, we need to remove all |
|
* custom attributes from the battery. |
|
*/ |
|
list_for_each_entry(hook, &battery_hook_list, list) { |
|
hook->remove_battery(battery->bat); |
|
} |
|
/* Then, just remove the battery from the list */ |
|
list_del(&battery->list); |
|
mutex_unlock(&hook_mutex); |
|
} |
|
|
|
static void __exit battery_hook_exit(void) |
|
{ |
|
struct acpi_battery_hook *hook; |
|
struct acpi_battery_hook *ptr; |
|
/* |
|
* At this point, the acpi_bus_unregister_driver() |
|
* has called remove for all batteries. We just |
|
* need to remove the hooks. |
|
*/ |
|
list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) { |
|
__battery_hook_unregister(hook, 1); |
|
} |
|
mutex_destroy(&hook_mutex); |
|
} |
|
|
|
static int sysfs_add_battery(struct acpi_battery *battery) |
|
{ |
|
struct power_supply_config psy_cfg = { .drv_data = battery, }; |
|
bool full_cap_broken = false; |
|
|
|
if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && |
|
!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity)) |
|
full_cap_broken = true; |
|
|
|
if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
|
if (full_cap_broken) { |
|
battery->bat_desc.properties = |
|
charge_battery_full_cap_broken_props; |
|
battery->bat_desc.num_properties = |
|
ARRAY_SIZE(charge_battery_full_cap_broken_props); |
|
} else { |
|
battery->bat_desc.properties = charge_battery_props; |
|
battery->bat_desc.num_properties = |
|
ARRAY_SIZE(charge_battery_props); |
|
} |
|
} else { |
|
if (full_cap_broken) { |
|
battery->bat_desc.properties = |
|
energy_battery_full_cap_broken_props; |
|
battery->bat_desc.num_properties = |
|
ARRAY_SIZE(energy_battery_full_cap_broken_props); |
|
} else { |
|
battery->bat_desc.properties = energy_battery_props; |
|
battery->bat_desc.num_properties = |
|
ARRAY_SIZE(energy_battery_props); |
|
} |
|
} |
|
|
|
battery->bat_desc.name = acpi_device_bid(battery->device); |
|
battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; |
|
battery->bat_desc.get_property = acpi_battery_get_property; |
|
|
|
battery->bat = power_supply_register_no_ws(&battery->device->dev, |
|
&battery->bat_desc, &psy_cfg); |
|
|
|
if (IS_ERR(battery->bat)) { |
|
int result = PTR_ERR(battery->bat); |
|
|
|
battery->bat = NULL; |
|
return result; |
|
} |
|
battery_hook_add_battery(battery); |
|
return device_create_file(&battery->bat->dev, &alarm_attr); |
|
} |
|
|
|
static void sysfs_remove_battery(struct acpi_battery *battery) |
|
{ |
|
mutex_lock(&battery->sysfs_lock); |
|
if (!battery->bat) { |
|
mutex_unlock(&battery->sysfs_lock); |
|
return; |
|
} |
|
battery_hook_remove_battery(battery); |
|
device_remove_file(&battery->bat->dev, &alarm_attr); |
|
power_supply_unregister(battery->bat); |
|
battery->bat = NULL; |
|
mutex_unlock(&battery->sysfs_lock); |
|
} |
|
|
|
static void find_battery(const struct dmi_header *dm, void *private) |
|
{ |
|
struct acpi_battery *battery = (struct acpi_battery *)private; |
|
/* Note: the hardcoded offsets below have been extracted from |
|
the source code of dmidecode. */ |
|
if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { |
|
const u8 *dmi_data = (const u8 *)(dm + 1); |
|
int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); |
|
if (dm->length >= 18) |
|
dmi_capacity *= dmi_data[17]; |
|
if (battery->design_capacity * battery->design_voltage / 1000 |
|
!= dmi_capacity && |
|
battery->design_capacity * 10 == dmi_capacity) |
|
set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
|
&battery->flags); |
|
} |
|
} |
|
|
|
/* |
|
* According to the ACPI spec, some kinds of primary batteries can |
|
* report percentage battery remaining capacity directly to OS. |
|
* In this case, it reports the Last Full Charged Capacity == 100 |
|
* and BatteryPresentRate == 0xFFFFFFFF. |
|
* |
|
* Now we found some battery reports percentage remaining capacity |
|
* even if it's rechargeable. |
|
* https://bugzilla.kernel.org/show_bug.cgi?id=15979 |
|
* |
|
* Handle this correctly so that they won't break userspace. |
|
*/ |
|
static void acpi_battery_quirks(struct acpi_battery *battery) |
|
{ |
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
|
return; |
|
|
|
if (battery->full_charge_capacity == 100 && |
|
battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && |
|
battery->capacity_now >= 0 && battery->capacity_now <= 100) { |
|
set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
|
battery->full_charge_capacity = battery->design_capacity; |
|
battery->capacity_now = (battery->capacity_now * |
|
battery->full_charge_capacity) / 100; |
|
} |
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) |
|
return; |
|
|
|
if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { |
|
const char *s; |
|
s = dmi_get_system_info(DMI_PRODUCT_VERSION); |
|
if (s && !strncasecmp(s, "ThinkPad", 8)) { |
|
dmi_walk(find_battery, battery); |
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, |
|
&battery->flags) && |
|
battery->design_voltage) { |
|
battery->design_capacity = |
|
battery->design_capacity * |
|
10000 / battery->design_voltage; |
|
battery->full_charge_capacity = |
|
battery->full_charge_capacity * |
|
10000 / battery->design_voltage; |
|
battery->design_capacity_warning = |
|
battery->design_capacity_warning * |
|
10000 / battery->design_voltage; |
|
battery->capacity_now = battery->capacity_now * |
|
10000 / battery->design_voltage; |
|
} |
|
} |
|
} |
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags)) |
|
return; |
|
|
|
if (acpi_battery_is_degraded(battery) && |
|
battery->capacity_now > battery->full_charge_capacity) { |
|
set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags); |
|
battery->capacity_now = battery->full_charge_capacity; |
|
} |
|
} |
|
|
|
static int acpi_battery_update(struct acpi_battery *battery, bool resume) |
|
{ |
|
int result = acpi_battery_get_status(battery); |
|
|
|
if (result) |
|
return result; |
|
|
|
if (!acpi_battery_present(battery)) { |
|
sysfs_remove_battery(battery); |
|
battery->update_time = 0; |
|
return 0; |
|
} |
|
|
|
if (resume) |
|
return 0; |
|
|
|
if (!battery->update_time) { |
|
result = acpi_battery_get_info(battery); |
|
if (result) |
|
return result; |
|
acpi_battery_init_alarm(battery); |
|
} |
|
|
|
result = acpi_battery_get_state(battery); |
|
if (result) |
|
return result; |
|
acpi_battery_quirks(battery); |
|
|
|
if (!battery->bat) { |
|
result = sysfs_add_battery(battery); |
|
if (result) |
|
return result; |
|
} |
|
|
|
/* |
|
* Wakeup the system if battery is critical low |
|
* or lower than the alarm level |
|
*/ |
|
if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) || |
|
(test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) && |
|
(battery->capacity_now <= battery->alarm))) |
|
acpi_pm_wakeup_event(&battery->device->dev); |
|
|
|
return result; |
|
} |
|
|
|
static void acpi_battery_refresh(struct acpi_battery *battery) |
|
{ |
|
int power_unit; |
|
|
|
if (!battery->bat) |
|
return; |
|
|
|
power_unit = battery->power_unit; |
|
|
|
acpi_battery_get_info(battery); |
|
|
|
if (power_unit == battery->power_unit) |
|
return; |
|
|
|
/* The battery has changed its reporting units. */ |
|
sysfs_remove_battery(battery); |
|
sysfs_add_battery(battery); |
|
} |
|
|
|
/* -------------------------------------------------------------------------- |
|
Driver Interface |
|
-------------------------------------------------------------------------- */ |
|
|
|
static void acpi_battery_notify(struct acpi_device *device, u32 event) |
|
{ |
|
struct acpi_battery *battery = acpi_driver_data(device); |
|
struct power_supply *old; |
|
|
|
if (!battery) |
|
return; |
|
old = battery->bat; |
|
/* |
|
* On Acer Aspire V5-573G notifications are sometimes triggered too |
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* early. For example, when AC is unplugged and notification is |
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* triggered, battery state is still reported as "Full", and changes to |
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* "Discharging" only after short delay, without any notification. |
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*/ |
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if (battery_notification_delay_ms > 0) |
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msleep(battery_notification_delay_ms); |
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if (event == ACPI_BATTERY_NOTIFY_INFO) |
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acpi_battery_refresh(battery); |
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acpi_battery_update(battery, false); |
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acpi_bus_generate_netlink_event(device->pnp.device_class, |
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dev_name(&device->dev), event, |
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acpi_battery_present(battery)); |
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acpi_notifier_call_chain(device, event, acpi_battery_present(battery)); |
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/* acpi_battery_update could remove power_supply object */ |
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if (old && battery->bat) |
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power_supply_changed(battery->bat); |
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} |
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|
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static int battery_notify(struct notifier_block *nb, |
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unsigned long mode, void *_unused) |
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{ |
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struct acpi_battery *battery = container_of(nb, struct acpi_battery, |
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pm_nb); |
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int result; |
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|
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switch (mode) { |
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case PM_POST_HIBERNATION: |
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case PM_POST_SUSPEND: |
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if (!acpi_battery_present(battery)) |
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return 0; |
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|
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if (battery->bat) { |
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acpi_battery_refresh(battery); |
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} else { |
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result = acpi_battery_get_info(battery); |
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if (result) |
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return result; |
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|
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result = sysfs_add_battery(battery); |
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if (result) |
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return result; |
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} |
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|
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acpi_battery_init_alarm(battery); |
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acpi_battery_get_state(battery); |
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break; |
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} |
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|
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return 0; |
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} |
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|
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static int __init |
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battery_bix_broken_package_quirk(const struct dmi_system_id *d) |
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{ |
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battery_bix_broken_package = 1; |
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return 0; |
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} |
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|
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static int __init |
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battery_notification_delay_quirk(const struct dmi_system_id *d) |
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{ |
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battery_notification_delay_ms = 1000; |
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return 0; |
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} |
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|
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static int __init |
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battery_ac_is_broken_quirk(const struct dmi_system_id *d) |
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{ |
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battery_ac_is_broken = 1; |
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return 0; |
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} |
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|
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static int __init |
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battery_do_not_check_pmic_quirk(const struct dmi_system_id *d) |
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{ |
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battery_check_pmic = 0; |
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return 0; |
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} |
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|
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static const struct dmi_system_id bat_dmi_table[] __initconst = { |
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{ |
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/* NEC LZ750/LS */ |
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.callback = battery_bix_broken_package_quirk, |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "NEC"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), |
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}, |
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}, |
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{ |
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/* Acer Aspire V5-573G */ |
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.callback = battery_notification_delay_quirk, |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"), |
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}, |
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}, |
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{ |
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/* Point of View mobii wintab p800w */ |
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.callback = battery_ac_is_broken_quirk, |
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.matches = { |
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DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), |
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DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), |
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DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"), |
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/* Above matches are too generic, add bios-date match */ |
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DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"), |
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}, |
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}, |
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{ |
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/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ |
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.callback = battery_do_not_check_pmic_quirk, |
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.matches = { |
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DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), |
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}, |
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}, |
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{ |
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/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ |
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.callback = battery_do_not_check_pmic_quirk, |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), |
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DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), |
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}, |
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}, |
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{}, |
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}; |
|
|
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/* |
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* Some machines'(E,G Lenovo Z480) ECs are not stable |
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* during boot up and this causes battery driver fails to be |
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* probed due to failure of getting battery information |
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* from EC sometimes. After several retries, the operation |
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* may work. So add retry code here and 20ms sleep between |
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* every retries. |
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*/ |
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static int acpi_battery_update_retry(struct acpi_battery *battery) |
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{ |
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int retry, ret; |
|
|
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for (retry = 5; retry; retry--) { |
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ret = acpi_battery_update(battery, false); |
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if (!ret) |
|
break; |
|
|
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msleep(20); |
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} |
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return ret; |
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} |
|
|
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static int acpi_battery_add(struct acpi_device *device) |
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{ |
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int result = 0; |
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struct acpi_battery *battery = NULL; |
|
|
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if (!device) |
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return -EINVAL; |
|
|
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if (device->dep_unmet) |
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return -EPROBE_DEFER; |
|
|
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battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
|
if (!battery) |
|
return -ENOMEM; |
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battery->device = device; |
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strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
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strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
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device->driver_data = battery; |
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mutex_init(&battery->lock); |
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mutex_init(&battery->sysfs_lock); |
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if (acpi_has_method(battery->device->handle, "_BIX")) |
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set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
|
|
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result = acpi_battery_update_retry(battery); |
|
if (result) |
|
goto fail; |
|
|
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pr_info("Slot [%s] (battery %s)\n", acpi_device_bid(device), |
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device->status.battery_present ? "present" : "absent"); |
|
|
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battery->pm_nb.notifier_call = battery_notify; |
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register_pm_notifier(&battery->pm_nb); |
|
|
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device_init_wakeup(&device->dev, 1); |
|
|
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return result; |
|
|
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fail: |
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sysfs_remove_battery(battery); |
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mutex_destroy(&battery->lock); |
|
mutex_destroy(&battery->sysfs_lock); |
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kfree(battery); |
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return result; |
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} |
|
|
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static int acpi_battery_remove(struct acpi_device *device) |
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{ |
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struct acpi_battery *battery = NULL; |
|
|
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if (!device || !acpi_driver_data(device)) |
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return -EINVAL; |
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device_init_wakeup(&device->dev, 0); |
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battery = acpi_driver_data(device); |
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unregister_pm_notifier(&battery->pm_nb); |
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sysfs_remove_battery(battery); |
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mutex_destroy(&battery->lock); |
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mutex_destroy(&battery->sysfs_lock); |
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kfree(battery); |
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return 0; |
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} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
/* this is needed to learn about changes made in suspended state */ |
|
static int acpi_battery_resume(struct device *dev) |
|
{ |
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struct acpi_battery *battery; |
|
|
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if (!dev) |
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return -EINVAL; |
|
|
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battery = acpi_driver_data(to_acpi_device(dev)); |
|
if (!battery) |
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return -EINVAL; |
|
|
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battery->update_time = 0; |
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acpi_battery_update(battery, true); |
|
return 0; |
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} |
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#else |
|
#define acpi_battery_resume NULL |
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#endif |
|
|
|
static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
|
|
|
static struct acpi_driver acpi_battery_driver = { |
|
.name = "battery", |
|
.class = ACPI_BATTERY_CLASS, |
|
.ids = battery_device_ids, |
|
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
|
.ops = { |
|
.add = acpi_battery_add, |
|
.remove = acpi_battery_remove, |
|
.notify = acpi_battery_notify, |
|
}, |
|
.drv.pm = &acpi_battery_pm, |
|
}; |
|
|
|
static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
|
{ |
|
unsigned int i; |
|
int result; |
|
|
|
dmi_check_system(bat_dmi_table); |
|
|
|
if (battery_check_pmic) { |
|
for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++) |
|
if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) { |
|
pr_info("found native %s PMIC, not loading\n", |
|
acpi_battery_blacklist[i]); |
|
return; |
|
} |
|
} |
|
|
|
result = acpi_bus_register_driver(&acpi_battery_driver); |
|
battery_driver_registered = (result == 0); |
|
} |
|
|
|
static int __init acpi_battery_init(void) |
|
{ |
|
if (acpi_disabled) |
|
return -ENODEV; |
|
|
|
async_cookie = async_schedule(acpi_battery_init_async, NULL); |
|
return 0; |
|
} |
|
|
|
static void __exit acpi_battery_exit(void) |
|
{ |
|
async_synchronize_cookie(async_cookie + 1); |
|
if (battery_driver_registered) { |
|
acpi_bus_unregister_driver(&acpi_battery_driver); |
|
battery_hook_exit(); |
|
} |
|
} |
|
|
|
module_init(acpi_battery_init); |
|
module_exit(acpi_battery_exit);
|
|
|