linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) ST-Ericsson SA 2011

 *

 * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson.

 */

​

#include <linux/sysfs.h>

#include <linux/init.h>

#include <linux/stat.h>

#include <linux/slab.h>

#include <linux/idr.h>

#include <linux/spinlock.h>

#include <linux/sys_soc.h>

#include <linux/err.h>

#include <linux/glob.h>

​

static DEFINE_IDA(soc_ida);

​

static ssize_t soc_info_get(struct device *dev,

                struct device_attribute *attr,

                char *buf);

​

struct soc_device {

    struct device dev;

    struct soc_device_attribute *attr;

    int soc_dev_num;

};

​

static struct bus_type soc_bus_type = {

    .name  = "soc",

};

​

static DEVICE_ATTR(machine,  S_IRUGO, soc_info_get,  NULL);

static DEVICE_ATTR(family,   S_IRUGO, soc_info_get,  NULL);

static DEVICE_ATTR(soc_id,   S_IRUGO, soc_info_get,  NULL);

static DEVICE_ATTR(revision, S_IRUGO, soc_info_get,  NULL);

​

struct device *soc_device_to_device(struct soc_device *soc_dev)

{

    return &soc_dev->dev;

}

​

static umode_t soc_attribute_mode(struct kobject *kobj,

                struct attribute *attr,

                int index)

{

    struct device *dev = container_of(kobj, struct device, kobj);

    struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);

​

    if ((attr == &dev_attr_machine.attr)

        && (soc_dev->attr->machine != NULL))

        return attr->mode;

    if ((attr == &dev_attr_family.attr)

        && (soc_dev->attr->family != NULL))

        return attr->mode;

    if ((attr == &dev_attr_revision.attr)

        && (soc_dev->attr->revision != NULL))

        return attr->mode;

    if ((attr == &dev_attr_soc_id.attr)

        && (soc_dev->attr->soc_id != NULL))

        return attr->mode;

​