#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cdev.h>
#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/device.h> 
#include <linux/platform_device.h>


#define CCM_CCGR1                               0x020C406C  //时钟控制寄存器
#define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO04        0x020E006C  //GPIO1_04复用功能选择寄存器
#define IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO04        0x020E02F8  //PAD属性设置寄存器
#define GPIO1_GDIR                              0x0209C004  //GPIO方向设置寄存器（输入或输出）
#define GPIO1_DR                                0x0209C000  //GPIO输出状态寄存器

#define CCM_CCGR3                               0x020C4074
#define GPIO4_GDIR                              0x020A8004
#define GPIO4_DR                                0x020A8000

#define IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO020       0x020E01E0
#define IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO020       0x020E046C

#define IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO019       0x020E01DC
#define IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO019       0x020E0468


static int led_cdev_release(struct inode *inode, struct file *filp)
{
    return 0;
}

static struct resource rled_resource[] = {
    [0] = DEFINE_RES_MEM(GPIO1_DR, 4),
    [1] = DEFINE_RES_MEM(GPIO1_GDIR, 4),
    [2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO04, 4),
    [3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
    [4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO04, 4),
};

unsigned int rled_hwinfo[2] = { 4, 26 };

static struct platform_device rled_pdev = {
    .name = "led_pdev",
    .id = 0,
    .num_resources = ARRAY_SIZE(rled_resource),
    .resource = rled_resource,
    .dev = {
        .release = led_cdev_release,
        .platform_data = rled_hwinfo,
        },

};

static struct resource gled_resource[] = {
    [0] = DEFINE_RES_MEM(GPIO4_DR, 4),
    [1] = DEFINE_RES_MEM(GPIO4_GDIR, 4),
    [2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO020, 4),
    [3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
    [4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO020, 4),
};

unsigned int gled_hwinfo[2] = { 20, 12 };


static struct platform_device gled_pdev = {
    .name = "led_pdev",
    .id = 1,
    .num_resources = ARRAY_SIZE(gled_resource),
    .resource = gled_resource,
    .dev = {
        .release = led_cdev_release,
        .platform_data = gled_hwinfo,
        },

};


static struct resource bled_resource[] = {
    [0] = DEFINE_RES_MEM(GPIO4_DR, 4),
    [1] = DEFINE_RES_MEM(GPIO4_GDIR, 4),
    [2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO019, 4),
    [3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
    [4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO019, 4),
};


unsigned int bled_hwinfo[2] = { 19, 12 };


static struct platform_device bled_pdev = {
    .name = "led_pdev",
    .id = 2,
    .num_resources = ARRAY_SIZE(bled_resource),
    .resource = bled_resource,
    .dev = {
        .release = led_cdev_release,
        .platform_data = bled_hwinfo,
        },

};




static __init int led_pdev_init(void)
{
    printk("pdev init\n");
    platform_device_register(&rled_pdev);
    platform_device_register(&gled_pdev);
    platform_device_register(&bled_pdev);
    return 0;

}
module_init(led_pdev_init);


static __exit void led_pdev_exit(void)
{
    printk("pdev exit\n");
    platform_device_unregister(&bled_pdev);
    platform_device_unregister(&gled_pdev);
    platform_device_unregister(&rled_pdev);
}
module_exit(led_pdev_exit);


MODULE_AUTHOR("liuchao");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("the example for platform driver");