138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/cdev.h>
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#include <linux/fs.h>
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#include <linux/wait.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#define CCM_CCGR1 0x020C406C //时钟控制寄存器
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#define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO04 0x020E006C //GPIO1_04复用功能选择寄存器
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#define IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO04 0x020E02F8 //PAD属性设置寄存器
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#define GPIO1_GDIR 0x0209C004 //GPIO方向设置寄存器（输入或输出）
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#define GPIO1_DR 0x0209C000 //GPIO输出状态寄存器
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#define CCM_CCGR3 0x020C4074
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#define GPIO4_GDIR 0x020A8004
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#define GPIO4_DR 0x020A8000
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#define IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO020 0x020E01E0
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#define IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO020 0x020E046C
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#define IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO019 0x020E01DC
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#define IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO019 0x020E0468
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static int led_cdev_release(struct inode *inode, struct file *filp)
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{
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return 0;
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}
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static struct resource rled_resource[] = {
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[0] = DEFINE_RES_MEM(GPIO1_DR, 4),
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[1] = DEFINE_RES_MEM(GPIO1_GDIR, 4),
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[2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO04, 4),
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[3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
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[4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO04, 4),
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};
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unsigned int rled_hwinfo[2] = { 4, 26 };
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static struct platform_device rled_pdev = {
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.name = "led_pdev",
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.id = 0,
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.num_resources = ARRAY_SIZE(rled_resource),
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.resource = rled_resource,
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.dev = {
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.release = led_cdev_release,
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.platform_data = rled_hwinfo,
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},
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};
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static struct resource gled_resource[] = {
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[0] = DEFINE_RES_MEM(GPIO4_DR, 4),
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[1] = DEFINE_RES_MEM(GPIO4_GDIR, 4),
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[2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO020, 4),
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[3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
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[4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO020, 4),
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};
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unsigned int gled_hwinfo[2] = { 20, 12 };
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static struct platform_device gled_pdev = {
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.name = "led_pdev",
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.id = 1,
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.num_resources = ARRAY_SIZE(gled_resource),
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.resource = gled_resource,
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.dev = {
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.release = led_cdev_release,
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.platform_data = gled_hwinfo,
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},
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};
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static struct resource bled_resource[] = {
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[0] = DEFINE_RES_MEM(GPIO4_DR, 4),
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[1] = DEFINE_RES_MEM(GPIO4_GDIR, 4),
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[2] = DEFINE_RES_MEM(IOMUXC_SW_MUX_CTL_PAD_GPIO4_IO019, 4),
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[3] = DEFINE_RES_MEM(CCM_CCGR1, 4),
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[4] = DEFINE_RES_MEM(IOMUXC_SW_PAD_CTL_PAD_GPIO4_IO019, 4),
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};
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unsigned int bled_hwinfo[2] = { 19, 12 };
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static struct platform_device bled_pdev = {
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.name = "led_pdev",
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.id = 2,
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.num_resources = ARRAY_SIZE(bled_resource),
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.resource = bled_resource,
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.dev = {
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.release = led_cdev_release,
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.platform_data = bled_hwinfo,
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},
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};
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static __init int led_pdev_init(void)
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{
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printk("pdev init\n");
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platform_device_register(&rled_pdev);
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platform_device_register(&gled_pdev);
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platform_device_register(&bled_pdev);
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return 0;
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}
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module_init(led_pdev_init);
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static __exit void led_pdev_exit(void)
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{
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printk("pdev exit\n");
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platform_device_unregister(&bled_pdev);
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platform_device_unregister(&gled_pdev);
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platform_device_unregister(&rled_pdev);
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}
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module_exit(led_pdev_exit);
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MODULE_AUTHOR("liuchao");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("the example for platform driver");
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