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714 lines
19 KiB
714 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* sbs.c - ACPI Smart Battery System 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) 2005-2007 Vladimir Lebedev <[email protected]> |
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* Copyright (c) 2005 Rich Townsend <[email protected]> |
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*/ |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/kernel.h> |
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#include <linux/acpi.h> |
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#include <linux/timer.h> |
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#include <linux/jiffies.h> |
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#include <linux/delay.h> |
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#include <linux/power_supply.h> |
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#include <linux/platform_data/x86/apple.h> |
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#include <acpi/battery.h> |
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#include "sbshc.h" |
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#define PREFIX "ACPI: " |
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#define ACPI_SBS_CLASS "sbs" |
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#define ACPI_AC_CLASS "ac_adapter" |
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#define ACPI_SBS_DEVICE_NAME "Smart Battery System" |
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#define ACPI_BATTERY_DIR_NAME "BAT%i" |
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#define ACPI_AC_DIR_NAME "AC0" |
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#define ACPI_SBS_NOTIFY_STATUS 0x80 |
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#define ACPI_SBS_NOTIFY_INFO 0x81 |
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MODULE_AUTHOR("Alexey Starikovskiy <[email protected]>"); |
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MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); |
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MODULE_LICENSE("GPL"); |
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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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#define MAX_SBS_BAT 4 |
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#define ACPI_SBS_BLOCK_MAX 32 |
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static const struct acpi_device_id sbs_device_ids[] = { |
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{"ACPI0002", 0}, |
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{"", 0}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, sbs_device_ids); |
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struct acpi_battery { |
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struct power_supply *bat; |
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struct power_supply_desc bat_desc; |
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struct acpi_sbs *sbs; |
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unsigned long update_time; |
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char name[8]; |
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char manufacturer_name[ACPI_SBS_BLOCK_MAX]; |
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char device_name[ACPI_SBS_BLOCK_MAX]; |
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char device_chemistry[ACPI_SBS_BLOCK_MAX]; |
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u16 alarm_capacity; |
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u16 full_charge_capacity; |
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u16 design_capacity; |
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u16 design_voltage; |
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u16 serial_number; |
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u16 cycle_count; |
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u16 temp_now; |
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u16 voltage_now; |
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s16 rate_now; |
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s16 rate_avg; |
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u16 capacity_now; |
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u16 state_of_charge; |
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u16 state; |
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u16 mode; |
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u16 spec; |
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u8 id; |
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u8 present:1; |
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u8 have_sysfs_alarm:1; |
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}; |
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#define to_acpi_battery(x) power_supply_get_drvdata(x) |
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struct acpi_sbs { |
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struct power_supply *charger; |
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struct acpi_device *device; |
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struct acpi_smb_hc *hc; |
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struct mutex lock; |
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struct acpi_battery battery[MAX_SBS_BAT]; |
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u8 batteries_supported:4; |
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u8 manager_present:1; |
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u8 charger_present:1; |
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u8 charger_exists:1; |
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}; |
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#define to_acpi_sbs(x) power_supply_get_drvdata(x) |
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static int acpi_sbs_remove(struct acpi_device *device); |
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static int acpi_battery_get_state(struct acpi_battery *battery); |
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static inline int battery_scale(int log) |
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{ |
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int scale = 1; |
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while (log--) |
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scale *= 10; |
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return scale; |
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} |
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static inline int acpi_battery_vscale(struct acpi_battery *battery) |
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{ |
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return battery_scale((battery->spec & 0x0f00) >> 8); |
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} |
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static inline int acpi_battery_ipscale(struct acpi_battery *battery) |
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{ |
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return battery_scale((battery->spec & 0xf000) >> 12); |
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} |
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static inline int acpi_battery_mode(struct acpi_battery *battery) |
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{ |
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return (battery->mode & 0x8000); |
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} |
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static inline int acpi_battery_scale(struct acpi_battery *battery) |
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{ |
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return (acpi_battery_mode(battery) ? 10 : 1) * |
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acpi_battery_ipscale(battery); |
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} |
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static int sbs_get_ac_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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struct acpi_sbs *sbs = to_acpi_sbs(psy); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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val->intval = sbs->charger_present; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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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->device_chemistry)) |
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return POWER_SUPPLY_TECHNOLOGY_NiCd; |
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if (!strcasecmp("NiMH", battery->device_chemistry)) |
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return POWER_SUPPLY_TECHNOLOGY_NiMH; |
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if (!strcasecmp("LION", battery->device_chemistry)) |
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return POWER_SUPPLY_TECHNOLOGY_LION; |
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if (!strcasecmp("LiP", battery->device_chemistry)) |
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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_sbs_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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struct acpi_battery *battery = to_acpi_battery(psy); |
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if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) |
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return -ENODEV; |
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acpi_battery_get_state(battery); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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if (battery->rate_now < 0) |
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
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else if (battery->rate_now > 0) |
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val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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else |
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val->intval = POWER_SUPPLY_STATUS_FULL; |
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break; |
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case POWER_SUPPLY_PROP_PRESENT: |
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val->intval = battery->present; |
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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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val->intval = battery->design_voltage * |
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acpi_battery_vscale(battery) * 1000; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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val->intval = battery->voltage_now * |
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acpi_battery_vscale(battery) * 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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val->intval = abs(battery->rate_now) * |
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acpi_battery_ipscale(battery) * 1000; |
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val->intval *= (acpi_battery_mode(battery)) ? |
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(battery->voltage_now * |
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acpi_battery_vscale(battery) / 1000) : 1; |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_AVG: |
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case POWER_SUPPLY_PROP_POWER_AVG: |
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val->intval = abs(battery->rate_avg) * |
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acpi_battery_ipscale(battery) * 1000; |
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val->intval *= (acpi_battery_mode(battery)) ? |
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(battery->voltage_now * |
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acpi_battery_vscale(battery) / 1000) : 1; |
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break; |
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case POWER_SUPPLY_PROP_CAPACITY: |
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val->intval = battery->state_of_charge; |
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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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val->intval = battery->design_capacity * |
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acpi_battery_scale(battery) * 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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val->intval = battery->full_charge_capacity * |
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acpi_battery_scale(battery) * 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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val->intval = battery->capacity_now * |
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acpi_battery_scale(battery) * 1000; |
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break; |
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case POWER_SUPPLY_PROP_TEMP: |
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val->intval = battery->temp_now - 2730; // dK -> dC |
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break; |
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case POWER_SUPPLY_PROP_MODEL_NAME: |
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val->strval = battery->device_name; |
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break; |
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case POWER_SUPPLY_PROP_MANUFACTURER: |
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val->strval = battery->manufacturer_name; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static enum power_supply_property sbs_ac_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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}; |
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static enum power_supply_property sbs_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_CURRENT_AVG, |
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POWER_SUPPLY_PROP_CAPACITY, |
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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_TEMP, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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}; |
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static enum power_supply_property sbs_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_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_CURRENT_AVG, |
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POWER_SUPPLY_PROP_POWER_NOW, |
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POWER_SUPPLY_PROP_POWER_AVG, |
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POWER_SUPPLY_PROP_CAPACITY, |
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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_TEMP, |
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POWER_SUPPLY_PROP_MODEL_NAME, |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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}; |
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static const struct power_supply_desc acpi_sbs_charger_desc = { |
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.name = "sbs-charger", |
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.type = POWER_SUPPLY_TYPE_MAINS, |
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.properties = sbs_ac_props, |
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.num_properties = ARRAY_SIZE(sbs_ac_props), |
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.get_property = sbs_get_ac_property, |
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}; |
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/* -------------------------------------------------------------------------- |
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Smart Battery System Management |
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-------------------------------------------------------------------------- */ |
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struct acpi_battery_reader { |
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u8 command; /* command for battery */ |
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u8 mode; /* word or block? */ |
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size_t offset; /* offset inside struct acpi_sbs_battery */ |
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}; |
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static struct acpi_battery_reader info_readers[] = { |
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{0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, |
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{0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, |
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{0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, |
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{0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, |
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{0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, |
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{0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, |
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{0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, |
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{0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, |
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{0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, |
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{0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, |
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{0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, |
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}; |
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static struct acpi_battery_reader state_readers[] = { |
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{0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, |
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{0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, |
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{0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, |
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{0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, |
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{0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, |
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{0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, |
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{0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, |
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}; |
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static int acpi_manager_get_info(struct acpi_sbs *sbs) |
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{ |
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int result = 0; |
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u16 battery_system_info; |
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result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
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0x04, (u8 *)&battery_system_info); |
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if (!result) |
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sbs->batteries_supported = battery_system_info & 0x000f; |
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return result; |
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} |
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static int acpi_battery_get_info(struct acpi_battery *battery) |
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{ |
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int i, result = 0; |
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for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { |
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result = acpi_smbus_read(battery->sbs->hc, |
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info_readers[i].mode, |
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ACPI_SBS_BATTERY, |
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info_readers[i].command, |
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(u8 *) battery + |
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info_readers[i].offset); |
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if (result) |
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break; |
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} |
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return result; |
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} |
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static int acpi_battery_get_state(struct acpi_battery *battery) |
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{ |
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int i, result = 0; |
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if (battery->update_time && |
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time_before(jiffies, battery->update_time + |
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msecs_to_jiffies(cache_time))) |
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return 0; |
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for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { |
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result = acpi_smbus_read(battery->sbs->hc, |
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state_readers[i].mode, |
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ACPI_SBS_BATTERY, |
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state_readers[i].command, |
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(u8 *)battery + |
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state_readers[i].offset); |
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if (result) |
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goto end; |
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} |
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end: |
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battery->update_time = jiffies; |
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return result; |
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} |
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static int acpi_battery_get_alarm(struct acpi_battery *battery) |
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{ |
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return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, |
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ACPI_SBS_BATTERY, 0x01, |
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(u8 *)&battery->alarm_capacity); |
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} |
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static int acpi_battery_set_alarm(struct acpi_battery *battery) |
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{ |
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struct acpi_sbs *sbs = battery->sbs; |
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u16 value, sel = 1 << (battery->id + 12); |
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int ret; |
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if (sbs->manager_present) { |
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ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
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0x01, (u8 *)&value); |
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if (ret) |
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goto end; |
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if ((value & 0xf000) != sel) { |
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value &= 0x0fff; |
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value |= sel; |
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ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, |
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ACPI_SBS_MANAGER, |
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0x01, (u8 *)&value, 2); |
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if (ret) |
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goto end; |
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} |
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} |
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ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, |
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0x01, (u8 *)&battery->alarm_capacity, 2); |
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end: |
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return ret; |
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} |
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static int acpi_ac_get_present(struct acpi_sbs *sbs) |
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{ |
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int result; |
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u16 status; |
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result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, |
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0x13, (u8 *) & status); |
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if (result) |
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return result; |
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|
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/* |
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* The spec requires that bit 4 always be 1. If it's not set, assume |
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* that the implementation doesn't support an SBS charger. |
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* |
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* And on some MacBooks a status of 0xffff is always returned, no |
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* matter whether the charger is plugged in or not, which is also |
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* wrong, so ignore the SBS charger for those too. |
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*/ |
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if (!((status >> 4) & 0x1) || status == 0xffff) |
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return -ENODEV; |
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sbs->charger_present = (status >> 15) & 0x1; |
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return 0; |
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} |
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static ssize_t acpi_battery_alarm_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
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acpi_battery_get_alarm(battery); |
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return sprintf(buf, "%d\n", battery->alarm_capacity * |
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acpi_battery_scale(battery) * 1000); |
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} |
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static ssize_t acpi_battery_alarm_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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unsigned long x; |
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struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); |
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if (sscanf(buf, "%lu\n", &x) == 1) |
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battery->alarm_capacity = x / |
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(1000 * acpi_battery_scale(battery)); |
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if (battery->present) |
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acpi_battery_set_alarm(battery); |
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return count; |
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} |
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static const struct device_attribute alarm_attr = { |
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.attr = {.name = "alarm", .mode = 0644}, |
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.show = acpi_battery_alarm_show, |
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.store = acpi_battery_alarm_store, |
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}; |
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|
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/* -------------------------------------------------------------------------- |
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Driver Interface |
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-------------------------------------------------------------------------- */ |
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static int acpi_battery_read(struct acpi_battery *battery) |
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{ |
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int result = 0, saved_present = battery->present; |
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u16 state; |
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|
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if (battery->sbs->manager_present) { |
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result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, |
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ACPI_SBS_MANAGER, 0x01, (u8 *)&state); |
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if (!result) |
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battery->present = state & (1 << battery->id); |
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state &= 0x0fff; |
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state |= 1 << (battery->id + 12); |
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acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, |
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ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); |
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} else if (battery->id == 0) |
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battery->present = 1; |
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|
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if (result || !battery->present) |
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return result; |
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|
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if (saved_present != battery->present) { |
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battery->update_time = 0; |
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result = acpi_battery_get_info(battery); |
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if (result) { |
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battery->present = 0; |
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return result; |
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} |
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} |
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result = acpi_battery_get_state(battery); |
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if (result) |
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battery->present = 0; |
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return result; |
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} |
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|
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/* Smart Battery */ |
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static int acpi_battery_add(struct acpi_sbs *sbs, int id) |
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{ |
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struct acpi_battery *battery = &sbs->battery[id]; |
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struct power_supply_config psy_cfg = { .drv_data = battery, }; |
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int result; |
|
|
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battery->id = id; |
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battery->sbs = sbs; |
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result = acpi_battery_read(battery); |
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if (result) |
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return result; |
|
|
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sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); |
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battery->bat_desc.name = battery->name; |
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battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; |
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if (!acpi_battery_mode(battery)) { |
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battery->bat_desc.properties = sbs_charge_battery_props; |
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battery->bat_desc.num_properties = |
|
ARRAY_SIZE(sbs_charge_battery_props); |
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} else { |
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battery->bat_desc.properties = sbs_energy_battery_props; |
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battery->bat_desc.num_properties = |
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ARRAY_SIZE(sbs_energy_battery_props); |
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} |
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battery->bat_desc.get_property = acpi_sbs_battery_get_property; |
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battery->bat = power_supply_register(&sbs->device->dev, |
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&battery->bat_desc, &psy_cfg); |
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if (IS_ERR(battery->bat)) { |
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result = PTR_ERR(battery->bat); |
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battery->bat = NULL; |
|
goto end; |
|
} |
|
|
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result = device_create_file(&battery->bat->dev, &alarm_attr); |
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if (result) |
|
goto end; |
|
battery->have_sysfs_alarm = 1; |
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end: |
|
printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", |
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ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
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battery->name, battery->present ? "present" : "absent"); |
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return result; |
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} |
|
|
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static void acpi_battery_remove(struct acpi_sbs *sbs, int id) |
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{ |
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struct acpi_battery *battery = &sbs->battery[id]; |
|
|
|
if (battery->bat) { |
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if (battery->have_sysfs_alarm) |
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device_remove_file(&battery->bat->dev, &alarm_attr); |
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power_supply_unregister(battery->bat); |
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} |
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} |
|
|
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static int acpi_charger_add(struct acpi_sbs *sbs) |
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{ |
|
int result; |
|
struct power_supply_config psy_cfg = { .drv_data = sbs, }; |
|
|
|
result = acpi_ac_get_present(sbs); |
|
if (result) |
|
goto end; |
|
|
|
sbs->charger_exists = 1; |
|
sbs->charger = power_supply_register(&sbs->device->dev, |
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&acpi_sbs_charger_desc, &psy_cfg); |
|
if (IS_ERR(sbs->charger)) { |
|
result = PTR_ERR(sbs->charger); |
|
sbs->charger = NULL; |
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} |
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printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", |
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ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), |
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ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); |
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end: |
|
return result; |
|
} |
|
|
|
static void acpi_charger_remove(struct acpi_sbs *sbs) |
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{ |
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if (sbs->charger) |
|
power_supply_unregister(sbs->charger); |
|
} |
|
|
|
static void acpi_sbs_callback(void *context) |
|
{ |
|
int id; |
|
struct acpi_sbs *sbs = context; |
|
struct acpi_battery *bat; |
|
u8 saved_charger_state = sbs->charger_present; |
|
u8 saved_battery_state; |
|
|
|
if (sbs->charger_exists) { |
|
acpi_ac_get_present(sbs); |
|
if (sbs->charger_present != saved_charger_state) |
|
kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE); |
|
} |
|
|
|
if (sbs->manager_present) { |
|
for (id = 0; id < MAX_SBS_BAT; ++id) { |
|
if (!(sbs->batteries_supported & (1 << id))) |
|
continue; |
|
bat = &sbs->battery[id]; |
|
saved_battery_state = bat->present; |
|
acpi_battery_read(bat); |
|
if (saved_battery_state == bat->present) |
|
continue; |
|
kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE); |
|
} |
|
} |
|
} |
|
|
|
static int acpi_sbs_add(struct acpi_device *device) |
|
{ |
|
struct acpi_sbs *sbs; |
|
int result = 0; |
|
int id; |
|
|
|
sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); |
|
if (!sbs) { |
|
result = -ENOMEM; |
|
goto end; |
|
} |
|
|
|
mutex_init(&sbs->lock); |
|
|
|
sbs->hc = acpi_driver_data(device->parent); |
|
sbs->device = device; |
|
strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); |
|
strcpy(acpi_device_class(device), ACPI_SBS_CLASS); |
|
device->driver_data = sbs; |
|
|
|
result = acpi_charger_add(sbs); |
|
if (result && result != -ENODEV) |
|
goto end; |
|
|
|
result = 0; |
|
|
|
if (!x86_apple_machine) { |
|
result = acpi_manager_get_info(sbs); |
|
if (!result) { |
|
sbs->manager_present = 1; |
|
for (id = 0; id < MAX_SBS_BAT; ++id) |
|
if ((sbs->batteries_supported & (1 << id))) |
|
acpi_battery_add(sbs, id); |
|
} |
|
} |
|
|
|
if (!sbs->manager_present) |
|
acpi_battery_add(sbs, 0); |
|
|
|
acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); |
|
end: |
|
if (result) |
|
acpi_sbs_remove(device); |
|
return result; |
|
} |
|
|
|
static int acpi_sbs_remove(struct acpi_device *device) |
|
{ |
|
struct acpi_sbs *sbs; |
|
int id; |
|
|
|
if (!device) |
|
return -EINVAL; |
|
sbs = acpi_driver_data(device); |
|
if (!sbs) |
|
return -EINVAL; |
|
mutex_lock(&sbs->lock); |
|
acpi_smbus_unregister_callback(sbs->hc); |
|
for (id = 0; id < MAX_SBS_BAT; ++id) |
|
acpi_battery_remove(sbs, id); |
|
acpi_charger_remove(sbs); |
|
mutex_unlock(&sbs->lock); |
|
mutex_destroy(&sbs->lock); |
|
kfree(sbs); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int acpi_sbs_resume(struct device *dev) |
|
{ |
|
struct acpi_sbs *sbs; |
|
if (!dev) |
|
return -EINVAL; |
|
sbs = to_acpi_device(dev)->driver_data; |
|
acpi_sbs_callback(sbs); |
|
return 0; |
|
} |
|
#else |
|
#define acpi_sbs_resume NULL |
|
#endif |
|
|
|
static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); |
|
|
|
static struct acpi_driver acpi_sbs_driver = { |
|
.name = "sbs", |
|
.class = ACPI_SBS_CLASS, |
|
.ids = sbs_device_ids, |
|
.ops = { |
|
.add = acpi_sbs_add, |
|
.remove = acpi_sbs_remove, |
|
}, |
|
.drv.pm = &acpi_sbs_pm, |
|
}; |
|
module_acpi_driver(acpi_sbs_driver);
|
|
|