C180_oyster_driver/ec_version.c

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/poll.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include "light_ring.h"


extern struct kobject *vfiec_kobj;


/* ==================== mode ==================== */
static ssize_t fw_version_show(struct kobject *kobj, struct kobj_attribute *attr,
                         char *buf)
{
    // 这里待完善，获取真实的，版本号
    memcpy(buf, "VF3965U.0x21", strlen("VF3965U.0x21"));

    return strlen("VF3965U.0x21");
}

static ssize_t mode_store(struct kobject *kobj, struct kobj_attribute *attr,
                          const char *buf, size_t count)
{
    printk("mode_store kernel rev:%s\n", buf);
    return count;
}

static struct kobj_attribute ec_version_attr =
    __ATTR(fw_version, 0444, fw_version_show, mode_store);

/* ==================== 属性组 ==================== */
static struct attribute *ec_version_attrs[] = {
    &ec_version_attr.attr,
    NULL,
};

static struct attribute_group ec_version_attr_group = {
    .attrs = ec_version_attrs,
};

int ec_version_init(void)
{
    int ret;

    /* 创建属性文件 */
    ret = sysfs_create_group(vfiec_kobj, &ec_version_attr_group);
    if (ret)
    {
        pr_err("Faiec_version to create sysfs group: %d\n", ret);
    }

    return ret;
}

void ec_version_exit(void)
{
    sysfs_remove_group(vfiec_kobj, &ec_version_attr_group);
}