linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 *  thermal.c - sysfs interface of thermal devices

 *

 *  Copyright (C) 2016 Eduardo Valentin <edubezval@gmail.com>

 *

 *  Highly based on original thermal_core.c

 *  Copyright (C) 2008 Intel Corp

 *  Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>

 *  Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/sysfs.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/jiffies.h>

​

#include "thermal_core.h"

​

/* sys I/F for thermal zone */

​

static ssize_t

type_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    struct thermal_zone_device *tz = to_thermal_zone(dev);

​

    return sprintf(buf, "%s\n", tz->type);

}

​

static ssize_t

temp_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    struct thermal_zone_device *tz = to_thermal_zone(dev);

    int temperature, ret;

​

    ret = thermal_zone_get_temp(tz, &temperature);

​

    if (ret)

        return ret;

​

    return sprintf(buf, "%d\n", temperature);

}

​

static ssize_t

mode_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    struct thermal_zone_device *tz = to_thermal_zone(dev);

    enum thermal_device_mode mode;

    int result;

​

    if (!tz->ops->get_mode)

        return -EPERM;

​

    result = tz->ops->get_mode(tz, &mode);

    if (result)

        return result;

​

    return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled"

               : "disabled");

}

​

static ssize_t

mode_store(struct device *dev, struct device_attribute *attr,

       const char *buf, size_t count)

{

    struct thermal_zone_device *tz = to_thermal_zone(dev);

    int result;

​

    if (!tz->ops->set_mode)

        return -EPERM;

​

    if (!strncmp(buf, "enabled", sizeof("enabled") - 1))

        result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED);

    else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))

        result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED);

    else

        result = -EINVAL;

​

    if (result)

        return result;

​

    return count;

}

​

static ssize_t

trip_point_type_show(struct device *dev, struct device_attribute *attr,

             char *buf)

{