Add the batteryled module framework

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 ec_version.o buzzer.o fan.o writeprotect.o myname.o cash_drawers.o
+coral-objs := main.o led.o light_ring.o ssegment.o ec_version.o buzzer.o fan.o writeprotect.o myname.o cash_drawers.o batteryled.o
 
 KERNELDIR := /lib/modules/$(shell uname -r)/build
 ccflags-y += -I./include

batteryled.c

@@ -0,0 +1,126 @@
+#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;
+static struct kobject *batteryled_kobj;
+
+static unsigned int led_charge_val = 0;
+static unsigned int led_health_val = 0;
+
+
+/* ==================== max_fade_brightness ==================== */
+static ssize_t led_health_show(struct kobject *kobj,
+                                        struct kobj_attribute *attr,
+                                        char *buf)
+{
+    return sprintf(buf, "%u\n", led_health_val);
+}
+
+static ssize_t led_health_store(struct kobject *kobj,
+                                         struct kobj_attribute *attr,
+                                         const char *buf, size_t count)
+{
+    u32 val;
+    int ret;
+
+    ret = kstrtou32(buf, 10, &val);
+    if (ret < 0)
+        return ret;
+
+    led_health_val = val;
+    pr_info("batteryled: led_health_val %u\n", led_health_val);
+
+    return count;
+}
+
+static struct kobj_attribute led_health =
+    __ATTR(led_health, 0644, led_health_show, led_health_store);
+
+/* ==================== mode ==================== */
+static ssize_t led_charge_show(struct kobject *kobj, struct kobj_attribute *attr,
+                         char *buf)
+{
+    const char *mode_str;
+
+    return sprintf(buf, "%u\n", led_charge_val);
+}
+
+static ssize_t led_charge_store(struct kobject *kobj, struct kobj_attribute *attr,
+                          const char *buf, size_t count)
+{
+    u32 val;
+    int ret;
+
+    ret = kstrtou32(buf, 10, &val);
+    if (ret < 0)
+        return ret;
+
+    led_charge_val = val;
+    pr_info("batteryled: led_charge_val %u\n", led_charge_val);
+
+    return count;
+}
+
+static struct kobj_attribute led_charge =
+    __ATTR(led_charge, 0644, led_charge_show, led_charge_store);
+
+/* ==================== 属性组 ==================== */
+static struct attribute *batteryled_attrs[] = {
+    &led_charge.attr,
+    &led_health.attr,
+    NULL,
+};
+
+static struct attribute_group batteryled_attr_group = {
+    .attrs = batteryled_attrs,
+};
+
+int batteryled_init(void)
+{
+    int ret;
+
+        /* 创建 /sys/kernel/vfiec/batteryled */
+    batteryled_kobj = kobject_create_and_add("batteryled", vfiec_kobj);
+    if (!batteryled_kobj)
+    {
+        ret = -ENOMEM;
+        return ret;
+    }
+
+    /* 创建属性文件 */
+    ret = sysfs_create_group(batteryled_kobj, &batteryled_attr_group);
+    if (ret)
+    {
+        pr_err("Failed to create sysfs group: %d\n", ret);
+        goto free_batteryled_kobj;
+    }
+    return 0;
+
+free_batteryled_kobj:
+    kobject_put(batteryled_kobj);
+    return ret;
+}
+
+void batteryled_exit(void)
+{
+    sysfs_remove_group(batteryled_kobj, &batteryled_attr_group);
+    kobject_put(batteryled_kobj);
+}
+

batteryled.h

@@ -0,0 +1,7 @@
+#ifndef __BATTERYLED_H__
+#define __BATTERYLED_H__
+
+int batteryled_init(void);
+void batteryled_exit(void);
+
+#endif

main.c

@@ -25,6 +25,7 @@
 #include "writeprotect.h"
 #include "myname.h"
 #include "cash_drawers.h"
+#include "batteryled.h"
 
 struct kobject *vfiec_kobj = NULL;
 
@@ -38,6 +39,7 @@ static int __init all_driver_init(void)
         ret = -ENOMEM;
     }
 
+    batteryled_init();
     cashd_init();
     myname_init();
     writeprotect_init();
@@ -54,6 +56,7 @@ static int __init all_driver_init(void)
 
 static void __exit all_driver_exit(void)
 {
+    batteryled_exit();
     cashd_exit();
     myname_exit();
     writeprotect_exit();