add ec_version module

Makefile

@@ -3,7 +3,7 @@ CROSS_COMPILE=arm-poky-linux-gnueabi-
 #也可以同时编译多个模块  obj-m += export_symbol.o export_symbol1.o export_symbol2.o
 obj-m := coral.o
 
-coral-objs := main.o led.o light_ring.o ssegment.o
+coral-objs := main.o led.o light_ring.o ssegment.o ev_version.o
 
 KERNELDIR := /lib/modules/$(shell uname -r)/build
 ccflags-y += -I./include

ec_version.c

@@ -0,0 +1,72 @@
+#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);
+}
+

ec_version.h

@@ -0,0 +1,6 @@
+#ifndef __EV_VERSION_H__
+#define __EV_VERSION_H__
+
+int ec_version_init(void);
+void ec_version_exit(void);
+#endif

main.c

@@ -19,6 +19,7 @@
 #include "light_ring.h"
 #include "led.h"
 #include "ssegment.h"
+#include "ec_version.h"
 
 struct kobject *vfiec_kobj = NULL;
 
@@ -32,6 +33,7 @@ static int __init all_driver_init(void)
         ret = -ENOMEM;
     }
 
+    ec_version_init();
     light_ring_init();
     led_init();
     ssegment_init();
@@ -42,6 +44,7 @@ static int __init all_driver_init(void)
 
 static void __exit all_driver_exit(void)
 {
+    ec_version_exit();
     ssegment_exit();
     led_exit();
     light_ring_exit();