linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * A hwmon driver for ACPI 4.0 power meters

 * Copyright (C) 2009 IBM

 *

 * Author: Darrick J. Wong <darrick.wong@oracle.com>

 */

​

#include <linux/module.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/jiffies.h>

#include <linux/mutex.h>

#include <linux/dmi.h>

#include <linux/slab.h>

#include <linux/kdev_t.h>

#include <linux/sched.h>

#include <linux/time.h>

#include <linux/err.h>

#include <linux/acpi.h>

​

#define ACPI_POWER_METER_NAME       "power_meter"

ACPI_MODULE_NAME(ACPI_POWER_METER_NAME);

#define ACPI_POWER_METER_DEVICE_NAME    "Power Meter"

#define ACPI_POWER_METER_CLASS      "pwr_meter_resource"

​

#define NUM_SENSORS         17

​

#define POWER_METER_CAN_MEASURE (1 << 0)

#define POWER_METER_CAN_TRIP    (1 << 1)

#define POWER_METER_CAN_CAP (1 << 2)

#define POWER_METER_CAN_NOTIFY  (1 << 3)

#define POWER_METER_IS_BATTERY  (1 << 8)

#define UNKNOWN_HYSTERESIS  0xFFFFFFFF

​

#define METER_NOTIFY_CONFIG 0x80

#define METER_NOTIFY_TRIP   0x81

#define METER_NOTIFY_CAP    0x82

#define METER_NOTIFY_CAPPING    0x83

#define METER_NOTIFY_INTERVAL   0x84

​

#define POWER_AVERAGE_NAME  "power1_average"

#define POWER_CAP_NAME      "power1_cap"

#define POWER_AVG_INTERVAL_NAME "power1_average_interval"

#define POWER_ALARM_NAME    "power1_alarm"

​

static int cap_in_hardware;

static bool force_cap_on;

​

static int can_cap_in_hardware(void)

{

    return force_cap_on || cap_in_hardware;

}

​

static const struct acpi_device_id power_meter_ids[] = {

    {"ACPI000D", 0},

    {"", 0},

};

MODULE_DEVICE_TABLE(acpi, power_meter_ids);

​

struct acpi_power_meter_capabilities {

    u64     flags;

    u64     units;