586 lines
17 KiB
C
586 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Sysfs interface for the universal power supply monitor class
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*
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* Copyright © 2007 David Woodhouse <dwmw2@infradead.org>
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* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
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* Copyright © 2004 Szabolcs Gyurko
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* Copyright © 2003 Ian Molton <spyro@f2s.com>
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*
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* Modified: 2004, Oct Szabolcs Gyurko
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*/
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#include <linux/ctype.h>
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#include <linux/device.h>
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#include <linux/power_supply.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include "power_supply.h"
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#define MAX_PROP_NAME_LEN 30
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struct power_supply_attr {
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const char *prop_name;
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char attr_name[MAX_PROP_NAME_LEN + 1];
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struct device_attribute dev_attr;
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const char * const *text_values;
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int text_values_len;
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};
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#define _POWER_SUPPLY_ATTR(_name, _text, _len) \
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[POWER_SUPPLY_PROP_ ## _name] = \
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{ \
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.prop_name = #_name, \
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.attr_name = #_name "\0", \
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.text_values = _text, \
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.text_values_len = _len, \
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}
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#define POWER_SUPPLY_ATTR(_name) _POWER_SUPPLY_ATTR(_name, NULL, 0)
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#define _POWER_SUPPLY_ENUM_ATTR(_name, _text) \
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_POWER_SUPPLY_ATTR(_name, _text, ARRAY_SIZE(_text))
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#define POWER_SUPPLY_ENUM_ATTR(_name) \
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_POWER_SUPPLY_ENUM_ATTR(_name, POWER_SUPPLY_ ## _name ## _TEXT)
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static const char * const POWER_SUPPLY_TYPE_TEXT[] = {
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[POWER_SUPPLY_TYPE_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_TYPE_BATTERY] = "Battery",
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[POWER_SUPPLY_TYPE_UPS] = "UPS",
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[POWER_SUPPLY_TYPE_MAINS] = "Mains",
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[POWER_SUPPLY_TYPE_USB] = "USB",
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[POWER_SUPPLY_TYPE_USB_DCP] = "USB_DCP",
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[POWER_SUPPLY_TYPE_USB_CDP] = "USB_CDP",
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[POWER_SUPPLY_TYPE_USB_ACA] = "USB_ACA",
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[POWER_SUPPLY_TYPE_USB_TYPE_C] = "USB_C",
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[POWER_SUPPLY_TYPE_USB_PD] = "USB_PD",
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[POWER_SUPPLY_TYPE_USB_PD_DRP] = "USB_PD_DRP",
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[POWER_SUPPLY_TYPE_APPLE_BRICK_ID] = "BrickID",
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[POWER_SUPPLY_TYPE_WIRELESS] = "Wireless",
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#if defined(CONFIG_NO_GKI)
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[POWER_SUPPLY_TYPE_CHARGE_PUMP] = "Charge_Pump",
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#endif
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};
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static const char * const POWER_SUPPLY_USB_TYPE_TEXT[] = {
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[POWER_SUPPLY_USB_TYPE_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_USB_TYPE_SDP] = "SDP",
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[POWER_SUPPLY_USB_TYPE_DCP] = "DCP",
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[POWER_SUPPLY_USB_TYPE_CDP] = "CDP",
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[POWER_SUPPLY_USB_TYPE_ACA] = "ACA",
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[POWER_SUPPLY_USB_TYPE_C] = "C",
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[POWER_SUPPLY_USB_TYPE_PD] = "PD",
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[POWER_SUPPLY_USB_TYPE_PD_DRP] = "PD_DRP",
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[POWER_SUPPLY_USB_TYPE_PD_PPS] = "PD_PPS",
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[POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID] = "BrickID",
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};
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static const char * const POWER_SUPPLY_STATUS_TEXT[] = {
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[POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_STATUS_CHARGING] = "Charging",
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[POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging",
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[POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging",
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[POWER_SUPPLY_STATUS_FULL] = "Full",
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};
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static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = {
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[POWER_SUPPLY_CHARGE_TYPE_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_CHARGE_TYPE_NONE] = "N/A",
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[POWER_SUPPLY_CHARGE_TYPE_TRICKLE] = "Trickle",
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[POWER_SUPPLY_CHARGE_TYPE_FAST] = "Fast",
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[POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard",
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[POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive",
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[POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom",
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[POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Long Life",
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[POWER_SUPPLY_CHARGE_TYPE_BYPASS] = "Bypass",
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};
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static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
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[POWER_SUPPLY_HEALTH_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_HEALTH_GOOD] = "Good",
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[POWER_SUPPLY_HEALTH_OVERHEAT] = "Overheat",
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[POWER_SUPPLY_HEALTH_DEAD] = "Dead",
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[POWER_SUPPLY_HEALTH_OVERVOLTAGE] = "Over voltage",
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[POWER_SUPPLY_HEALTH_UNSPEC_FAILURE] = "Unspecified failure",
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[POWER_SUPPLY_HEALTH_COLD] = "Cold",
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[POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire",
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[POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE] = "Safety timer expire",
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[POWER_SUPPLY_HEALTH_OVERCURRENT] = "Over current",
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[POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED] = "Calibration required",
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[POWER_SUPPLY_HEALTH_WARM] = "Warm",
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[POWER_SUPPLY_HEALTH_COOL] = "Cool",
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[POWER_SUPPLY_HEALTH_HOT] = "Hot",
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[POWER_SUPPLY_HEALTH_NO_BATTERY] = "No battery",
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};
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static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
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[POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH",
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[POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion",
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[POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly",
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[POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe",
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[POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd",
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[POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn",
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};
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static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = {
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[POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical",
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[POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low",
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[POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal",
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[POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High",
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[POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full",
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};
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static const char * const POWER_SUPPLY_SCOPE_TEXT[] = {
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[POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown",
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[POWER_SUPPLY_SCOPE_SYSTEM] = "System",
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[POWER_SUPPLY_SCOPE_DEVICE] = "Device",
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};
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static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = {
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[POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto",
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[POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge",
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[POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge",
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};
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static struct power_supply_attr power_supply_attrs[] = {
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/* Properties of type `int' */
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POWER_SUPPLY_ENUM_ATTR(STATUS),
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POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE),
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POWER_SUPPLY_ENUM_ATTR(HEALTH),
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POWER_SUPPLY_ATTR(PRESENT),
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POWER_SUPPLY_ATTR(ONLINE),
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POWER_SUPPLY_ATTR(AUTHENTIC),
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POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY),
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POWER_SUPPLY_ATTR(CYCLE_COUNT),
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POWER_SUPPLY_ATTR(VOLTAGE_MAX),
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POWER_SUPPLY_ATTR(VOLTAGE_MIN),
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POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN),
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POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN),
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POWER_SUPPLY_ATTR(VOLTAGE_NOW),
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POWER_SUPPLY_ATTR(VOLTAGE_AVG),
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POWER_SUPPLY_ATTR(VOLTAGE_OCV),
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POWER_SUPPLY_ATTR(VOLTAGE_BOOT),
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POWER_SUPPLY_ATTR(CURRENT_MAX),
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POWER_SUPPLY_ATTR(CURRENT_NOW),
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POWER_SUPPLY_ATTR(CURRENT_AVG),
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POWER_SUPPLY_ATTR(CURRENT_BOOT),
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POWER_SUPPLY_ATTR(POWER_NOW),
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POWER_SUPPLY_ATTR(POWER_AVG),
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POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN),
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POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN),
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POWER_SUPPLY_ATTR(CHARGE_FULL),
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POWER_SUPPLY_ATTR(CHARGE_EMPTY),
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POWER_SUPPLY_ATTR(CHARGE_NOW),
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POWER_SUPPLY_ATTR(CHARGE_AVG),
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POWER_SUPPLY_ATTR(CHARGE_COUNTER),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
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POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR),
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POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
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POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
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POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),
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POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN),
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POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN),
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POWER_SUPPLY_ATTR(ENERGY_FULL),
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POWER_SUPPLY_ATTR(ENERGY_EMPTY),
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POWER_SUPPLY_ATTR(ENERGY_NOW),
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POWER_SUPPLY_ATTR(ENERGY_AVG),
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POWER_SUPPLY_ATTR(CAPACITY),
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POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN),
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POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX),
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POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN),
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POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL),
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POWER_SUPPLY_ATTR(TEMP),
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POWER_SUPPLY_ATTR(TEMP_MAX),
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POWER_SUPPLY_ATTR(TEMP_MIN),
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POWER_SUPPLY_ATTR(TEMP_ALERT_MIN),
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POWER_SUPPLY_ATTR(TEMP_ALERT_MAX),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX),
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POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW),
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POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG),
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POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW),
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POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG),
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POWER_SUPPLY_ENUM_ATTR(TYPE),
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POWER_SUPPLY_ATTR(USB_TYPE),
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POWER_SUPPLY_ENUM_ATTR(SCOPE),
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POWER_SUPPLY_ATTR(PRECHARGE_CURRENT),
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POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT),
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POWER_SUPPLY_ATTR(CALIBRATE),
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POWER_SUPPLY_ATTR(MANUFACTURE_YEAR),
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POWER_SUPPLY_ATTR(MANUFACTURE_MONTH),
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POWER_SUPPLY_ATTR(MANUFACTURE_DAY),
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#if defined(CONFIG_NO_GKI)
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/* Charge pump properties */
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POWER_SUPPLY_ATTR(CP_ALARM_STATUS),
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POWER_SUPPLY_ATTR(CP_BAT_OVP_ALARM),
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POWER_SUPPLY_ATTR(CP_BAT_OCP_ALARM),
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POWER_SUPPLY_ATTR(CP_BAT_UCP_ALARM),
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POWER_SUPPLY_ATTR(CP_BUS_OVP_ALARM),
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POWER_SUPPLY_ATTR(CP_BUS_OCP_ALARM),
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POWER_SUPPLY_ATTR(CP_BAT_THERM_ALARM),
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POWER_SUPPLY_ATTR(CP_BUS_THERM_ALARM),
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POWER_SUPPLY_ATTR(CP_DIE_THERM_ALARM),
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POWER_SUPPLY_ATTR(CP_FAULT_STATUS),
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POWER_SUPPLY_ATTR(CP_BAT_OVP_FAULT),
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POWER_SUPPLY_ATTR(CP_BAT_OCP_FAULT),
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POWER_SUPPLY_ATTR(CP_BUS_OVP_FAULT),
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POWER_SUPPLY_ATTR(CP_BUS_OCP_FAULT),
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POWER_SUPPLY_ATTR(CP_BAT_THERM_FAULT),
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POWER_SUPPLY_ATTR(CP_BUS_THERM_FAULT),
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POWER_SUPPLY_ATTR(CP_DIE_THERM_FAULT),
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POWER_SUPPLY_ATTR(CP_VBUS_ERROR_STATUS),
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POWER_SUPPLY_ATTR(CP_VBUS_HERROR_STATUS),
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POWER_SUPPLY_ATTR(CP_VBUS_LERROR_STATUS),
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POWER_SUPPLY_ATTR(CP_CHARGING_ENABLED),
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POWER_SUPPLY_ATTR(CP_WORK_MODE),
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POWER_SUPPLY_ATTR(CP_WDT_EN),
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POWER_SUPPLY_ATTR(CP_VOUT),
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POWER_SUPPLY_ATTR(CP_VBUS),
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POWER_SUPPLY_ATTR(CP_IBUS),
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POWER_SUPPLY_ATTR(CP_SWITCHER_EN),
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POWER_SUPPLY_ATTR(CP_BAT_TEMPERATURE),
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POWER_SUPPLY_ATTR(CP_BUS_TEMPERATURE),
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POWER_SUPPLY_ATTR(CP_DIE_TEMPERATURE),
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POWER_SUPPLY_ATTR(CP_ISNS),
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POWER_SUPPLY_ATTR(CP_TOGGLE_SWITCHER),
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POWER_SUPPLY_ATTR(CP_IRQ_STATUS),
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POWER_SUPPLY_ATTR(CP_ILIM),
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#endif
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/* Properties of type `const char *' */
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POWER_SUPPLY_ATTR(MODEL_NAME),
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POWER_SUPPLY_ATTR(MANUFACTURER),
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POWER_SUPPLY_ATTR(SERIAL_NUMBER),
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};
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static struct attribute *
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__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
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static struct power_supply_attr *to_ps_attr(struct device_attribute *attr)
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{
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return container_of(attr, struct power_supply_attr, dev_attr);
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}
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static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
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{
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return to_ps_attr(attr) - power_supply_attrs;
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}
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static ssize_t power_supply_show_usb_type(struct device *dev,
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const struct power_supply_desc *desc,
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union power_supply_propval *value,
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char *buf)
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{
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enum power_supply_usb_type usb_type;
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ssize_t count = 0;
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bool match = false;
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int i;
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for (i = 0; i < desc->num_usb_types; ++i) {
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usb_type = desc->usb_types[i];
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if (value->intval == usb_type) {
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count += sprintf(buf + count, "[%s] ",
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POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
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match = true;
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} else {
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count += sprintf(buf + count, "%s ",
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POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
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}
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}
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if (!match) {
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dev_warn(dev, "driver reporting unsupported connected type\n");
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return -EINVAL;
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}
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if (count)
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buf[count - 1] = '\n';
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return count;
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}
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static ssize_t power_supply_show_property(struct device *dev,
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struct device_attribute *attr,
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char *buf) {
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ssize_t ret;
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struct power_supply *psy = dev_get_drvdata(dev);
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struct power_supply_attr *ps_attr = to_ps_attr(attr);
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enum power_supply_property psp = dev_attr_psp(attr);
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union power_supply_propval value;
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if (psp == POWER_SUPPLY_PROP_TYPE) {
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value.intval = psy->desc->type;
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} else {
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ret = power_supply_get_property(psy, psp, &value);
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if (ret < 0) {
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if (ret == -ENODATA)
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dev_dbg_ratelimited(dev,
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"driver has no data for `%s' property\n",
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attr->attr.name);
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else if (ret != -ENODEV && ret != -EAGAIN)
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dev_err_ratelimited(dev,
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"driver failed to report `%s' property: %zd\n",
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attr->attr.name, ret);
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return ret;
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}
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}
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if (ps_attr->text_values_len > 0 &&
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value.intval < ps_attr->text_values_len && value.intval >= 0) {
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return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]);
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}
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switch (psp) {
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case POWER_SUPPLY_PROP_USB_TYPE:
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ret = power_supply_show_usb_type(dev, psy->desc,
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&value, buf);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
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ret = sprintf(buf, "%s\n", value.strval);
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break;
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default:
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ret = sprintf(buf, "%d\n", value.intval);
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}
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return ret;
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}
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static ssize_t power_supply_store_property(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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ssize_t ret;
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struct power_supply *psy = dev_get_drvdata(dev);
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struct power_supply_attr *ps_attr = to_ps_attr(attr);
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enum power_supply_property psp = dev_attr_psp(attr);
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union power_supply_propval value;
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ret = -EINVAL;
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if (ps_attr->text_values_len > 0) {
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ret = __sysfs_match_string(ps_attr->text_values,
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ps_attr->text_values_len, buf);
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}
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/*
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* If no match was found, then check to see if it is an integer.
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* Integer values are valid for enums in addition to the text value.
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*/
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if (ret < 0) {
|
|
long long_val;
|
|
|
|
ret = kstrtol(buf, 10, &long_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = long_val;
|
|
}
|
|
|
|
value.intval = ret;
|
|
|
|
ret = power_supply_set_property(psy, psp, &value);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return count;
|
|
}
|
|
|
|
static umode_t power_supply_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
int attrno)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
|
|
int i;
|
|
|
|
if (!power_supply_attrs[attrno].prop_name)
|
|
return 0;
|
|
|
|
if (attrno == POWER_SUPPLY_PROP_TYPE)
|
|
return mode;
|
|
|
|
for (i = 0; i < psy->desc->num_properties; i++) {
|
|
int property = psy->desc->properties[i];
|
|
|
|
if (property == attrno) {
|
|
if (psy->desc->property_is_writeable &&
|
|
psy->desc->property_is_writeable(psy, property) > 0)
|
|
mode |= S_IWUSR;
|
|
|
|
return mode;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct attribute_group power_supply_attr_group = {
|
|
.attrs = __power_supply_attrs,
|
|
.is_visible = power_supply_attr_is_visible,
|
|
};
|
|
|
|
static const struct attribute_group *power_supply_attr_groups[] = {
|
|
&power_supply_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static void str_to_lower(char *str)
|
|
{
|
|
while (*str) {
|
|
*str = tolower(*str);
|
|
str++;
|
|
}
|
|
}
|
|
|
|
void power_supply_init_attrs(struct device_type *dev_type)
|
|
{
|
|
int i;
|
|
|
|
dev_type->groups = power_supply_attr_groups;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) {
|
|
struct device_attribute *attr;
|
|
|
|
if (!power_supply_attrs[i].prop_name) {
|
|
pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n",
|
|
__func__, i);
|
|
sprintf(power_supply_attrs[i].attr_name, "_err_%d", i);
|
|
} else {
|
|
str_to_lower(power_supply_attrs[i].attr_name);
|
|
}
|
|
|
|
attr = &power_supply_attrs[i].dev_attr;
|
|
|
|
attr->attr.name = power_supply_attrs[i].attr_name;
|
|
attr->show = power_supply_show_property;
|
|
attr->store = power_supply_store_property;
|
|
__power_supply_attrs[i] = &attr->attr;
|
|
}
|
|
}
|
|
|
|
static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
|
|
enum power_supply_property prop, char *prop_buf)
|
|
{
|
|
int ret = 0;
|
|
struct power_supply_attr *pwr_attr;
|
|
struct device_attribute *dev_attr;
|
|
char *line;
|
|
|
|
pwr_attr = &power_supply_attrs[prop];
|
|
dev_attr = &pwr_attr->dev_attr;
|
|
|
|
ret = power_supply_show_property(dev, dev_attr, prop_buf);
|
|
if (ret == -ENODEV || ret == -ENODATA) {
|
|
/*
|
|
* When a battery is absent, we expect -ENODEV. Don't abort;
|
|
* send the uevent with at least the PRESENT=0 property
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
line = strchr(prop_buf, '\n');
|
|
if (line)
|
|
*line = 0;
|
|
|
|
return add_uevent_var(env, "POWER_SUPPLY_%s=%s",
|
|
pwr_attr->prop_name, prop_buf);
|
|
}
|
|
|
|
int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
struct power_supply *psy = dev_get_drvdata(dev);
|
|
int ret = 0, j;
|
|
char *prop_buf;
|
|
|
|
if (!psy || !psy->desc) {
|
|
dev_dbg(dev, "No power supply yet\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
|
|
if (ret)
|
|
return ret;
|
|
|
|
prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
|
|
if (!prop_buf)
|
|
return -ENOMEM;
|
|
|
|
ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf);
|
|
if (ret)
|
|
goto out;
|
|
|
|
for (j = 0; j < psy->desc->num_properties; j++) {
|
|
ret = add_prop_uevent(dev, env, psy->desc->properties[j],
|
|
prop_buf);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
free_page((unsigned long)prop_buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
ssize_t power_supply_charge_behaviour_show(struct device *dev,
|
|
unsigned int available_behaviours,
|
|
enum power_supply_charge_behaviour current_behaviour,
|
|
char *buf)
|
|
{
|
|
bool match = false, available, active;
|
|
ssize_t count = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
|
|
available = available_behaviours & BIT(i);
|
|
active = i == current_behaviour;
|
|
|
|
if (available && active) {
|
|
count += sysfs_emit_at(buf, count, "[%s] ",
|
|
POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
|
|
match = true;
|
|
} else if (available) {
|
|
count += sysfs_emit_at(buf, count, "%s ",
|
|
POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
|
|
}
|
|
}
|
|
|
|
if (!match) {
|
|
dev_warn(dev, "driver reporting unsupported charge behaviour\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (count)
|
|
buf[count - 1] = '\n';
|
|
|
|
return count;
|
|
}
|
|
EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
|
|
|
|
int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
|
|
{
|
|
int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
|
|
|
|
if (i < 0)
|
|
return i;
|
|
|
|
if (available_behaviours & BIT(i))
|
|
return i;
|
|
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);
|