纯小白, 头铁直接上的荔枝派的板子, 确实是入门比较困难, 结合着b站的一些教程和社区的资料, 倒腾很久终于写出了能用的闪灯驱动
这里记录和分享下, 欢迎交流指点[社区都是大佬萌新瑟瑟发抖 ]

驱动程序如下

#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>     //file_operations register_chrdev_region
#include <linux/kdev_t.h> //MKDEV
#include <linux/cdev.h>   //cdev_init
#include <linux/uaccess.h>//copy_from_user
#include <linux/hrtimer.h>//硬件定时器
#include <linux/gpio.h>   //gpio

#define DEV_LEDFLASH_TYPE 'k'
#define DEV_LEDFLASH_GETVALUE  _IOR(DEV_LEDFLASH_TYPE, 0x32, int)
#define DEV_LEDFLASH_SETVALUE  _IOW(DEV_LEDFLASH_TYPE, 0x33, int)

#define LED_PIN_NUMBER  65  //PC1=32*2+1
#define LED_FLASH_INTERVAL  500  //1hz

static int major= 222;//主设备号
static int minor = 0; //子设备号
static dev_t devno;   //设备号
struct class *cls;    //设备类
struct device *class_dev = NULL;  //设备节点
static struct hrtimer flashTimer; //定时器
static int interval = LED_FLASH_INTERVAL;  //定时器中断间隔(ms)

/**
 * @description: 定时器回调函数，这里用来闪灯
 * @param {hrtimer} *timer
 * @return {*}
 */
static enum hrtimer_restart flashTimer_handler(struct hrtimer *timer){
  static int num= 0;
  if(interval!=0){
    __gpio_set_value(LED_PIN_NUMBER, num++%2);
    // 设置下一次中断间隔
    hrtimer_forward_now(&flashTimer, ms_to_ktime(interval));
    return HRTIMER_RESTART;
  }else{
    // 关闭led
    __gpio_set_value(LED_PIN_NUMBER, 0);
    // 关闭定时器
    return HRTIMER_NORESTART;
  }
}

/**
 * @description: 打开设备文件, 启用LED口和定时器
 * @param {inode} *inode
 * @param {file} *filep
 * @return {*}
 */
static int ledflash_open(struct inode *inode, struct file *filep){
  int result;

	printk("[DRV] ledflash_open()\n");
  
  /* GPIO初始化 */
  printk("[DRV] _____gpio_init____\n");
  // 获取LED_GPIO访问权
  result= gpio_request(LED_PIN_NUMBER, NULL);
  if(result< 0){
    printk(KERN_ERR "[DRV] gpio_request() failed:%d\n", result);
    gpio_free(LED_PIN_NUMBER);
    return -1;
  }
  // TODO:使用pinctrl还可以配置上下拉，没找到例子还没有测试
  // 设置为输出模式
  result= gpio_direction_output(LED_PIN_NUMBER, 1);
  if(result< 0){
    printk(KERN_ERR "[DRV] gpio_direction_output() failed:%d\n", result);
		gpio_free(LED_PIN_NUMBER);
    return -1;
  }

  /* 定时器初始化 */
  printk("[DRV] _____hrtimer_init____\n");
  // 配置定时器为基于开机时间时钟的相对模式 //模式定义见time.h 和hrtimer.h
  hrtimer_init(&flashTimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
  // 设置回调函数
  flashTimer.function = &flashTimer_handler;
  // 开启定时器
  hrtimer_start(&flashTimer, ms_to_ktime(LED_FLASH_INTERVAL), HRTIMER_MODE_REL);

	return 0; 
}
/**
 * @description: 关闭设备文件, 释放LED口和定时器
 * @param {inode} *inode
 * @param {file} *filep
 * @return {*}
 */
static int ledflash_release(struct inode *inode, struct file *filep){
  // 取消定时器
  hrtimer_cancel(&flashTimer);
  // 关闭led
  __gpio_set_value(LED_PIN_NUMBER, 0);
  // 释放gpio控制权
	gpio_free(LED_PIN_NUMBER);

  printk("[DRV] ledflash_release()\n");
	return 0; 
}
/**
 * @description: 设备操作函数接口
 * @param {file} *filep
 * @param {unsigned int} cmd
 * @param {unsigned long} arg
 * @return {*}
 */
long ledflash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg){
	long ret;
	void __user *argp= (void __user *)arg;
	int __user *p= argp; //参数
  int set_val= LED_FLASH_INTERVAL;

  // 检测参数合法
	if(_IOC_TYPE(cmd)!= DEV_LEDFLASH_TYPE){
		pr_err("[DRV] cmd %u,bad magic 0x%x/0x%x.\n",cmd,_IOC_TYPE(cmd), DEV_LEDFLASH_TYPE);
		return -ENOTTY;
	}
	if(_IOC_DIR(cmd)& _IOC_READ)
		ret= !access_ok((void __user*)arg, _IOC_SIZE(cmd));
	else if(_IOC_DIR(cmd)& _IOC_WRITE)
		ret= !access_ok((void __user*)arg, _IOC_SIZE(cmd));
	if(ret){
		pr_err("[DRV] bad access %ld.\n",ret);
		return -EFAULT;
	}

  // 根据不同操作函数指令指令
	switch(cmd){
		case DEV_LEDFLASH_GETVALUE:
			ret = put_user(interval, p);
			printk("[DRV] DEV_LEDFLASH_GETVALUE %d\n",interval);
			break;
		case DEV_LEDFLASH_SETVALUE:
			ret = get_user(set_val, p);
      // 设置为0将关闭定时器
      if(interval== 0 && set_val> 0)
        hrtimer_restart(&flashTimer);
      interval= set_val;
      printk("[DRV] DEV_LEDFLASH_SETVALUE %d\n",interval);
			break;
		default:
			return -EINVAL;
	}
	return ret;
}

/**
 * @description: 文件操作接口绑定
 */
static struct file_operations ledflash_ops = {
	.open = ledflash_open,
  .release= ledflash_release,
  // .read= ledflash_read,
  // .write= ledflash_write, 
  .unlocked_ioctl= ledflash_ioctl,
};
/**
 * @description: 初始化程序
 */
static int ledflash_init(void){
	int result;
	printk("[DRV] _____ledflashdrv_init____\n");

  /* 设备初始化 */
  // 注册cdev设备号, 绑定标准文件接口
  // 查看验证cat /proc/devices | grep ledflash
  result = register_chrdev(major, "ledflashCd", &ledflash_ops);
	if(result <0){
		printk(KERN_ERR "[DRV] register_chrdev fail\n");
		goto out_err_0;
	}
  // 拼接主次设备号
  devno = MKDEV(major, minor);
  // 创建设备类 
  // 查看验证 ls /sys/class/ | grep ledflash
  cls = class_create(THIS_MODULE, "ledflashCls");
	if (IS_ERR(cls)) {
		printk(KERN_ERR "[DRV] class_create() failed for cls\n");
		result = PTR_ERR(cls);
		goto out_err_1;
	}
  // 创建设备节点，绑定设备类和设备号
  // 查看验证 ls /dev | grep ledflash
  class_dev = device_create(cls, NULL, devno, NULL, "ledflashDev");
	if (IS_ERR(class_dev)) {
    printk(KERN_ERR "[DRV] device_create() failed for class_dev\n");
		result = PTR_ERR(class_dev);
		goto out_err_2;
	}
  printk("[DRV] _____ledflashdrv_init_successed____\n");
  
	return 0;
out_err_2:
	class_destroy(cls);
out_err_1:
	unregister_chrdev(major,"ledflash");
out_err_0:  
	return 	result;
}
/**
 * @description: 卸载驱动，依次释放资源
 */
static void ledflash_exit(void){
  device_destroy(cls, devno);
  class_destroy(cls);
  unregister_chrdev(major, "ledflashCd");

  printk("[DRV] _____ledflash_exit_____\n");
	return;
}

// 安装驱动时可以设定主设备号
// 设定参数 insmod led_flash.ko major=333
module_param(major,  int,  0644);
// 绑定驱动安装和卸载程序
module_init(ledflash_init);  //insmod
module_exit(ledflash_exit);  //rmmod
// 驱动信息
// 测试modinfo找不到驱动, depmod找不到指令
// 需要手动将ko模块放到/lib/modules/5.4.61目录下
MODULE_LICENSE("GPL");
MODULE_AUTHOR("G");

makefile如下, 完整编译内核用时太久了, 手动设置三个参数后即可单独编译上传, 调试方便很多

# 完整内核编译会定义KERNELRELEASE
ifneq ($(KERNELRELEASE),)
obj-m := led_flash.o

else
# 打印一下进到这边直接编译了
$(warning ____alone_compile____)
# 配置为riscv架构
export ARCH=riscv
# 配置编译器
export CROSS_COMPILE=/home/ubt/tina-d1-h/prebuilt/gcc/linux-x86/riscv/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702/bin/riscv64-unknown-linux-gnu-
# 配置内核源码位置
KDIR = /home/ubt/tina-d1-h/out/d1-h-nezha/compile_dir/target/linux-d1-h-nezha/linux-5.4.61
# 指定驱动程序源码位置(当前目录)
PWD = $(shell pwd)
# 将led_flash.o 编译成led_flash.ko, 而led_flash.o 则由make的自动推导功能编译led_flash.c 文件生成
obj-m += led_flash.o
all:
	make -C $(KDIR) M=$(PWD) modules 
clean:
	make -C $(KDIR) M=$(PWD) clean

endif

Kconfig

config LED_FLASH
  tristate "led_flash driver, gpio out put pulse by timer"
  help
    led_flash help msg.

以上文件放在驱动目录下单独一个文件夹内,注意驱动目录的makefile和Kconfig需要添加该文件夹索引信息
然后make kernel_menuconfig进入驱动项即可配置
我尝试了直接上传ko文件安装报错, 还是直接mp更新了板子, 之后就可以直接上传更新驱动模块了
驱动编写参考教程
编写一个内核驱动，点亮 LED

测试的应用程序

#include <stdio.h>  // printf
#include <unistd.h> // open file
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#define DEV_LEDFLASH_TYPE 'k'
#define DEV_LEDFLASH_GETVALUE  _IOR(DEV_LEDFLASH_TYPE, 0x32, int)
#define DEV_LEDFLASH_SETVALUE  _IOW(DEV_LEDFLASH_TYPE, 0x33, int)

int fd;
int interval= 500;

int main(void)
{
  // printf("Hell! O’ world, why won’t my code compile?\n\n");
  printf("[USER] led_flash_begin\n");

  fd= open("/dev/ledflashDev", O_RDWR);
  if(fd< 0){
		perror("[USER] open failed\n");
		return -1;
	}

  // 读取默认值
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
  }
  printf("[USER] default interval= %d\n", interval);
  sleep(2);

  // 关闭
  interval = 0;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  // 设置为2hz
	interval = 250;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  // 设置为5hz
  interval = 100;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  close(fd);
  printf("[USER] steper_end\n");
	
	return 0;
}

makefile

#设置编译链路径及工具
CTOOL := riscv64-unknown-linux-gnu-
CCL := /home/ubt/tina-d1-h/prebuilt/gcc/linux-x86/riscv/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702
CC := ${CCL}/bin/${CTOOL}gcc

# build led_flash executable when user executes “make”
led_flash: led_flash.o
	$(CC) $(LDFLAGS) led_flash.o -o led_flash

led_flash.o: led_flash.c
	$(CC) $(CFLAGS) -c led_flash.c

# remove object files and executable when user executes “make clean”
clean:
	rm *.o led_flash

全部编译好后使用adb上传,安装运行效果如下

root@TinaLinux:/mnt/exUDISK/app# insmod ../mod/led_flash.ko
[ 2654.707249] led_flash: loading out-of-tree module taints kernel.
[ 2654.714946] [DRV] _____ledflashdrv_init____
[ 2654.720524] [DRV] _____ledflashdrv_init_successed____
root@TinaLinux:/mnt/exUDISK/app# ./led_flash
[USER] led_flash_begin[ 2664.649231] [DRV] ledflash_open()

[ 2664.654850] [DRV] _____gpio_init____
[ 2664.659067] [DRV] _____hrtimer_init____
[ 2664.663458] [DRV] DEV_LEDFLASH_GETVALUE 500
[USER] default interval= 500
[ 2666.668404] [DRV] DEV_LEDFLASH_SETVALUE 0
[ 2666.672975] [DRV] DEV_LEDFLASH_GETVALUE 0
[USER] set interval= 0
[ 2668.677738] [DRV] DEV_LEDFLASH_SETVALUE 250
[ 2668.682480] [DRV] DEV_LEDFLASH_GETVALUE 250
[USER] set interval= 250
[ 2670.687414] [DRV] DEV_LEDFLASH_SETVALUE 100
[ 2670.692243] [DRV] DEV_LEDFLASH_GETVALUE 100
[USER] set interval= 100
[ 2672.697095] [DRV] ledflash_release()
[USER] steper_end

闪灯测试完毕,后面就可以开始正式的深入研究了

试了下不配置downloadfile也是可行的,初始化时可以根据大小自动格式化系统

formating /dev/by-name/UDISK to ext4
mke2fs 1.46.4 (18-Aug-2021)
[    4.827559] random: mkfs.ext4: uninitialized urandom read (16 bytes read)
[    4.835361] random: mkfs.ext4: uninitialized urandom read (16 bytes read)
Creating filesystem with 3516935 4k blocks and 879552 inodes
Filesystem UUID: 84f444b8-02d2-4035-b7b1-ec4f15a8f417
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): [    6.281300]
[    6.281300] insmod_device_driver
[    6.281300]
[    6.288462] sunxi_usb_udc 4100000.udc-controller: 4100000.udc-controller supply udc not found, using dummy regulator
[    6.321295] hdmi_hpd_sys_config_release
done
Writing superblocks and filesystem accounting information: done

formating /dev/by-name/rootfs_data to ext4
mke2fs 1.46.4 (18-Aug-2021)
[   17.598480] random: mkfs.ext4: uninitialized urandom read (16 bytes read)
[   17.606271] random: mkfs.ext4: uninitialized urandom read (16 bytes read)
Creating filesystem with 262144 4k blocks and 65536 inodes
Filesystem UUID: 56bbb4d6-0db1-47ec-a35c-f66492e4fdad
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376

Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

就是大小还不太对,我再研究下
总之还是感谢大佬帮助

@whycan 可以了!!!

root@TinaLinux:/# df -kh
Filesystem                Size      Used Available Use% Mounted on
/dev/root                16.3M     16.3M         0 100% /rom
devtmpfs                492.8M         0    492.8M   0% /dev
tmpfs                   498.9M     32.0K    498.9M   0% /tmp
/dev/by-name/rootfs_data
                        891.0K     49.0K    802.0K   6% /overlay
overlayfs:/overlay      891.0K     49.0K    802.0K   6% /
/dev/by-name/UDISK       13.1G     24.0K     13.1G   0% /mnt/UDISK
root@TinaLinux:/# mount
/dev/root on /rom type squashfs (ro,noatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=504672k,nr_inodes=126168,mode=755)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
/dev/by-name/rootfs_data on /overlay type ext4 (rw,relatime)
overlayfs:/overlay on / type overlay (rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600,ptmxmode=000)
debugfs on /sys/kernel/debug type debugfs (rw,noatime)
none on /sys/kernel/config type configfs (rw,relatime)
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
/dev/by-name/UDISK on /mnt/UDISK type ext4 (rw,relatime)

刚才终于搞明白了fstab和sys_oartition.fex的对应关系重新配置了一下就可以了,现在是这么设置的

config 'mount'
	option  target		'/overlay'
	option	device		'/dev/by-name/rootfs_data'
	option	options		'rw,async'
	option	enabled		'1'

config 'mount'
	option  target		'/mnt/UDISK'
	option	device		'/dev/by-name/UDISK'
	option	options		'rw,async'
	option	enabled		'1'

[partition]
    name         = rootfs_data
    size         = 2097152
    downloadfile = "/home/ubt/tina-d1-h/fex/2Gb.fex"
    user_type    = 0x8000

[partition]
    name = UDISK
    user_type = 0x8000

就是rootfs_data我设置的是2G,不知道为啥它变成891k了
这个2Gb.fex我是用这个rootfs_data.fex生成的

@whycan 就当商家骗人的话想要使用触摸屏是需要MIPI+I2C这样的配置是嘛, 然后还需要HDMI输出另一个屏的信息, 触摸屏这一块的驱动都需要根据具体硬件自己写吧, 感觉还是挺麻烦的

@whycanservice 我淘宝看到一个只用MIPI的触摸屏, 我看手册里也写MIPI的接口支持双向通讯, 之前没用过这种接口的所以不太明白

小白求教,想采用HDMI输出图像+MIPI做交互屏的解决方案,论坛里似乎没看到有用触摸屏的例子. 淘宝有找到MIPI接口的触摸屏想问问能用不? 有没有什么例程可以参考下呀.
有翻到这个帖子D1的双屏异显第一弹来啦！,但是似乎只有镜像文件,视频中也看不出来是否有使用触摸屏.

纯小白, 头铁直接上的荔枝派的板子, 确实是入门比较困难, 结合着b站的一些教程和社区的资料, 倒腾很久终于写出了能用的闪灯驱动
这里记录和分享下, 欢迎交流指点[社区都是大佬萌新瑟瑟发抖 ]

驱动程序如下

#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>     //file_operations register_chrdev_region
#include <linux/kdev_t.h> //MKDEV
#include <linux/cdev.h>   //cdev_init
#include <linux/uaccess.h>//copy_from_user
#include <linux/hrtimer.h>//硬件定时器
#include <linux/gpio.h>   //gpio

#define DEV_LEDFLASH_TYPE 'k'
#define DEV_LEDFLASH_GETVALUE  _IOR(DEV_LEDFLASH_TYPE, 0x32, int)
#define DEV_LEDFLASH_SETVALUE  _IOW(DEV_LEDFLASH_TYPE, 0x33, int)

#define LED_PIN_NUMBER  65  //PC1=32*2+1
#define LED_FLASH_INTERVAL  500  //1hz

static int major= 222;//主设备号
static int minor = 0; //子设备号
static dev_t devno;   //设备号
struct class *cls;    //设备类
struct device *class_dev = NULL;  //设备节点
static struct hrtimer flashTimer; //定时器
static int interval = LED_FLASH_INTERVAL;  //定时器中断间隔(ms)

/**
 * @description: 定时器回调函数，这里用来闪灯
 * @param {hrtimer} *timer
 * @return {*}
 */
static enum hrtimer_restart flashTimer_handler(struct hrtimer *timer){
  static int num= 0;
  if(interval!=0){
    __gpio_set_value(LED_PIN_NUMBER, num++%2);
    // 设置下一次中断间隔
    hrtimer_forward_now(&flashTimer, ms_to_ktime(interval));
    return HRTIMER_RESTART;
  }else{
    // 关闭led
    __gpio_set_value(LED_PIN_NUMBER, 0);
    // 关闭定时器
    return HRTIMER_NORESTART;
  }
}

/**
 * @description: 打开设备文件, 启用LED口和定时器
 * @param {inode} *inode
 * @param {file} *filep
 * @return {*}
 */
static int ledflash_open(struct inode *inode, struct file *filep){
  int result;

	printk("[DRV] ledflash_open()\n");
  
  /* GPIO初始化 */
  printk("[DRV] _____gpio_init____\n");
  // 获取LED_GPIO访问权
  result= gpio_request(LED_PIN_NUMBER, NULL);
  if(result< 0){
    printk(KERN_ERR "[DRV] gpio_request() failed:%d\n", result);
    gpio_free(LED_PIN_NUMBER);
    return -1;
  }
  // TODO:使用pinctrl还可以配置上下拉，没找到例子还没有测试
  // 设置为输出模式
  result= gpio_direction_output(LED_PIN_NUMBER, 1);
  if(result< 0){
    printk(KERN_ERR "[DRV] gpio_direction_output() failed:%d\n", result);
		gpio_free(LED_PIN_NUMBER);
    return -1;
  }

  /* 定时器初始化 */
  printk("[DRV] _____hrtimer_init____\n");
  // 配置定时器为基于开机时间时钟的相对模式 //模式定义见time.h 和hrtimer.h
  hrtimer_init(&flashTimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
  // 设置回调函数
  flashTimer.function = &flashTimer_handler;
  // 开启定时器
  hrtimer_start(&flashTimer, ms_to_ktime(LED_FLASH_INTERVAL), HRTIMER_MODE_REL);

	return 0; 
}
/**
 * @description: 关闭设备文件, 释放LED口和定时器
 * @param {inode} *inode
 * @param {file} *filep
 * @return {*}
 */
static int ledflash_release(struct inode *inode, struct file *filep){
  // 取消定时器
  hrtimer_cancel(&flashTimer);
  // 关闭led
  __gpio_set_value(LED_PIN_NUMBER, 0);
  // 释放gpio控制权
	gpio_free(LED_PIN_NUMBER);

  printk("[DRV] ledflash_release()\n");
	return 0; 
}
/**
 * @description: 设备操作函数接口
 * @param {file} *filep
 * @param {unsigned int} cmd
 * @param {unsigned long} arg
 * @return {*}
 */
long ledflash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg){
	long ret;
	void __user *argp= (void __user *)arg;
	int __user *p= argp; //参数
  int set_val= LED_FLASH_INTERVAL;

  // 检测参数合法
	if(_IOC_TYPE(cmd)!= DEV_LEDFLASH_TYPE){
		pr_err("[DRV] cmd %u,bad magic 0x%x/0x%x.\n",cmd,_IOC_TYPE(cmd), DEV_LEDFLASH_TYPE);
		return -ENOTTY;
	}
	if(_IOC_DIR(cmd)& _IOC_READ)
		ret= !access_ok((void __user*)arg, _IOC_SIZE(cmd));
	else if(_IOC_DIR(cmd)& _IOC_WRITE)
		ret= !access_ok((void __user*)arg, _IOC_SIZE(cmd));
	if(ret){
		pr_err("[DRV] bad access %ld.\n",ret);
		return -EFAULT;
	}

  // 根据不同操作函数指令指令
	switch(cmd){
		case DEV_LEDFLASH_GETVALUE:
			ret = put_user(interval, p);
			printk("[DRV] DEV_LEDFLASH_GETVALUE %d\n",interval);
			break;
		case DEV_LEDFLASH_SETVALUE:
			ret = get_user(set_val, p);
      // 设置为0将关闭定时器
      if(interval== 0 && set_val> 0)
        hrtimer_restart(&flashTimer);
      interval= set_val;
      printk("[DRV] DEV_LEDFLASH_SETVALUE %d\n",interval);
			break;
		default:
			return -EINVAL;
	}
	return ret;
}

/**
 * @description: 文件操作接口绑定
 */
static struct file_operations ledflash_ops = {
	.open = ledflash_open,
  .release= ledflash_release,
  // .read= ledflash_read,
  // .write= ledflash_write, 
  .unlocked_ioctl= ledflash_ioctl,
};
/**
 * @description: 初始化程序
 */
static int ledflash_init(void){
	int result;
	printk("[DRV] _____ledflashdrv_init____\n");

  /* 设备初始化 */
  // 注册cdev设备号, 绑定标准文件接口
  // 查看验证cat /proc/devices | grep ledflash
  result = register_chrdev(major, "ledflashCd", &ledflash_ops);
	if(result <0){
		printk(KERN_ERR "[DRV] register_chrdev fail\n");
		goto out_err_0;
	}
  // 拼接主次设备号
  devno = MKDEV(major, minor);
  // 创建设备类 
  // 查看验证 ls /sys/class/ | grep ledflash
  cls = class_create(THIS_MODULE, "ledflashCls");
	if (IS_ERR(cls)) {
		printk(KERN_ERR "[DRV] class_create() failed for cls\n");
		result = PTR_ERR(cls);
		goto out_err_1;
	}
  // 创建设备节点，绑定设备类和设备号
  // 查看验证 ls /dev | grep ledflash
  class_dev = device_create(cls, NULL, devno, NULL, "ledflashDev");
	if (IS_ERR(class_dev)) {
    printk(KERN_ERR "[DRV] device_create() failed for class_dev\n");
		result = PTR_ERR(class_dev);
		goto out_err_2;
	}
  printk("[DRV] _____ledflashdrv_init_successed____\n");
  
	return 0;
out_err_2:
	class_destroy(cls);
out_err_1:
	unregister_chrdev(major,"ledflash");
out_err_0:  
	return 	result;
}
/**
 * @description: 卸载驱动，依次释放资源
 */
static void ledflash_exit(void){
  device_destroy(cls, devno);
  class_destroy(cls);
  unregister_chrdev(major, "ledflashCd");

  printk("[DRV] _____ledflash_exit_____\n");
	return;
}

// 安装驱动时可以设定主设备号
// 设定参数 insmod led_flash.ko major=333
module_param(major,  int,  0644);
// 绑定驱动安装和卸载程序
module_init(ledflash_init);  //insmod
module_exit(ledflash_exit);  //rmmod
// 驱动信息
// 测试modinfo找不到驱动, depmod找不到指令
// 需要手动将ko模块放到/lib/modules/5.4.61目录下
MODULE_LICENSE("GPL");
MODULE_AUTHOR("G");

makefile如下, 完整编译内核用时太久了, 手动设置三个参数后即可单独编译上传, 调试方便很多

# 完整内核编译会定义KERNELRELEASE
ifneq ($(KERNELRELEASE),)
obj-m := led_flash.o

else
# 打印一下进到这边直接编译了
$(warning ____alone_compile____)
# 配置为riscv架构
export ARCH=riscv
# 配置编译器
export CROSS_COMPILE=/home/ubt/tina-d1-h/prebuilt/gcc/linux-x86/riscv/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702/bin/riscv64-unknown-linux-gnu-
# 配置内核源码位置
KDIR = /home/ubt/tina-d1-h/out/d1-h-nezha/compile_dir/target/linux-d1-h-nezha/linux-5.4.61
# 指定驱动程序源码位置(当前目录)
PWD = $(shell pwd)
# 将led_flash.o 编译成led_flash.ko, 而led_flash.o 则由make的自动推导功能编译led_flash.c 文件生成
obj-m += led_flash.o
all:
	make -C $(KDIR) M=$(PWD) modules 
clean:
	make -C $(KDIR) M=$(PWD) clean

endif

Kconfig

config LED_FLASH
  tristate "led_flash driver, gpio out put pulse by timer"
  help
    led_flash help msg.

以上文件放在驱动目录下单独一个文件夹内,注意驱动目录的makefile和Kconfig需要添加该文件夹索引信息
然后make kernel_menuconfig进入驱动项即可配置
我尝试了直接上传ko文件安装报错, 还是直接mp更新了板子, 之后就可以直接上传更新驱动模块了
驱动编写参考教程
编写一个内核驱动，点亮 LED

测试的应用程序

#include <stdio.h>  // printf
#include <unistd.h> // open file
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#define DEV_LEDFLASH_TYPE 'k'
#define DEV_LEDFLASH_GETVALUE  _IOR(DEV_LEDFLASH_TYPE, 0x32, int)
#define DEV_LEDFLASH_SETVALUE  _IOW(DEV_LEDFLASH_TYPE, 0x33, int)

int fd;
int interval= 500;

int main(void)
{
  // printf("Hell! O’ world, why won’t my code compile?\n\n");
  printf("[USER] led_flash_begin\n");

  fd= open("/dev/ledflashDev", O_RDWR);
  if(fd< 0){
		perror("[USER] open failed\n");
		return -1;
	}

  // 读取默认值
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
  }
  printf("[USER] default interval= %d\n", interval);
  sleep(2);

  // 关闭
  interval = 0;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  // 设置为2hz
	interval = 250;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  // 设置为5hz
  interval = 100;
	if(ioctl(fd, DEV_LEDFLASH_SETVALUE, &interval)< 0){
    perror("[USER] DEV_LEDFLASH_SETVALUE failed\n");
		return -1;
  }
  if(ioctl(fd, DEV_LEDFLASH_GETVALUE, &interval)< 0){
		perror("[USER] DEV_LEDFLASH_GETVALUE failed\n");
		return -1;
	}
	printf("[USER] set interval= %d\n", interval);
  sleep(2);

  close(fd);
  printf("[USER] steper_end\n");
	
	return 0;
}

makefile

#设置编译链路径及工具
CTOOL := riscv64-unknown-linux-gnu-
CCL := /home/ubt/tina-d1-h/prebuilt/gcc/linux-x86/riscv/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702
CC := ${CCL}/bin/${CTOOL}gcc

# build led_flash executable when user executes “make”
led_flash: led_flash.o
	$(CC) $(LDFLAGS) led_flash.o -o led_flash

led_flash.o: led_flash.c
	$(CC) $(CFLAGS) -c led_flash.c

# remove object files and executable when user executes “make clean”
clean:
	rm *.o led_flash

全部编译好后使用adb上传,安装运行效果如下

root@TinaLinux:/mnt/exUDISK/app# insmod ../mod/led_flash.ko
[ 2654.707249] led_flash: loading out-of-tree module taints kernel.
[ 2654.714946] [DRV] _____ledflashdrv_init____
[ 2654.720524] [DRV] _____ledflashdrv_init_successed____
root@TinaLinux:/mnt/exUDISK/app# ./led_flash
[USER] led_flash_begin[ 2664.649231] [DRV] ledflash_open()

[ 2664.654850] [DRV] _____gpio_init____
[ 2664.659067] [DRV] _____hrtimer_init____
[ 2664.663458] [DRV] DEV_LEDFLASH_GETVALUE 500
[USER] default interval= 500
[ 2666.668404] [DRV] DEV_LEDFLASH_SETVALUE 0
[ 2666.672975] [DRV] DEV_LEDFLASH_GETVALUE 0
[USER] set interval= 0
[ 2668.677738] [DRV] DEV_LEDFLASH_SETVALUE 250
[ 2668.682480] [DRV] DEV_LEDFLASH_GETVALUE 250
[USER] set interval= 250
[ 2670.687414] [DRV] DEV_LEDFLASH_SETVALUE 100
[ 2670.692243] [DRV] DEV_LEDFLASH_GETVALUE 100
[USER] set interval= 100
[ 2672.697095] [DRV] ledflash_release()
[USER] steper_end

闪灯测试完毕,后面就可以开始正式的深入研究了

@xiaowenge
系统配置/应用打包这两个

才发现之前翻了半天论坛和手册才搞明白的SDK基础操作V853的这个网页讲的很清楚,D1H的网页里都没写

还是尝试找了下头文件位置,参考linux内核目录介绍和搜索功能,添加了一些路径

# build pulse executable when user executes “make”
pulse: pulse.o
	$(CC) $(LDFLAGS) pulse.o -o pulse

ABS_PATH = /home/ubt/tina-d1-h/lichee/linux-5.4/

# linux/xxx路径	-I/home/ubt/tina-d1-h/lichee/linux-5.4/include/		
# uapi/xxx路径	-I/home/ubt/tina-d1-h/lichee/linux-5.4/						
# asm/xxx路径		-I/home/ubt/tina-d1-h/lichee/linux-5.4/arch/riscv/include
# asm/xxx路径2	-I/home/ubt/tina-d1-h/lichee/linux-5.4/arch/riscv/include/generated
# linux/xxx路径2-I/home/ubt/tina-d1-h/lichee/linux-5.4/include/uapi/
INC = -I$(ABS_PATH) -I$(ABS_PATH)include/	 -I$(ABS_PATH)arch/riscv/include/ -I$(ABS_PATH)/arch/riscv/include/generated/ -I$(ABS_PATH)include/uapi/ 

pulse.o: pulse.c
	$(CC) $(CFLAGS) $(INC) -c pulse.c

# remove object files and executable when user executes “make clean”
clean:
	rm *.o pulse

编译出现了大量错误

/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:68:1: warning: empty declaration [enabled by default]
 struct pcpu_group_info {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:75:1: warning: empty declaration [enabled by default]
 struct pcpu_alloc_info {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:87:1: warning: empty declaration [enabled by default]
 enum pcpu_fc {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:94:27: error: storage class specified for parameter ‘pcpu_fc_names’
 extern const char * const pcpu_fc_names[PCPU_FC_NR];
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:96:21: error: storage class specified for parameter ‘pcpu_chosen_fc’
 extern enum pcpu_fc pcpu_chosen_fc;
                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:98:18: error: storage class specified for parameter ‘pcpu_fc_alloc_fn_t’
 typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size,
                  ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:100:16: error: storage class specified for parameter ‘pcpu_fc_free_fn_t’
 typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:101:16: error: storage class specified for parameter ‘pcpu_fc_populate_pte_fn_t’
 typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:102:14: error: storage class specified for parameter ‘pcpu_fc_cpu_distance_fn_t’
 typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);
              ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/printk.h:6:0,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/kernel.h:15,
                 from pulse.c:14:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/init.h:50:27: error: expected declaration specifiers or ‘...’ before ‘.’ token
 #define __init  __section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:104:33: note: in expansion of macro ‘__init’
 extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
                                 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/init.h:50:27: error: expected declaration specifiers or ‘...’ before ‘.’ token
 #define __init  __section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:106:13: note: in expansion of macro ‘__init’
 extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/init.h:50:27: error: expected declaration specifiers or ‘...’ before ‘.’ token
 #define __init  __section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:108:13: note: in expansion of macro ‘__init’
 extern void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
             ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:19:0,
                 from pulse.c:16:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:126:23: error: storage class specified for parameter ‘__alloc_reserved_percpu’
 extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:127:13: error: storage class specified for parameter ‘__is_kernel_percpu_address’
 extern bool __is_kernel_percpu_address(unsigned long addr, unsigned long *can_addr);
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:128:13: error: storage class specified for parameter ‘is_kernel_percpu_address’
 extern bool is_kernel_percpu_address(unsigned long addr);
             ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/printk.h:6:0,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/kernel.h:15,
                 from pulse.c:14:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/init.h:50:27: error: expected declaration specifiers or ‘...’ before ‘.’ token
 #define __init  __section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:131:13: note: in expansion of macro ‘__init’
 extern void __init setup_per_cpu_areas(void);
             ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:19:0,
                 from pulse.c:16:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:134:23: error: storage class specified for parameter ‘__alloc_percpu_gfp’
 extern void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp);
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:135:23: error: storage class specified for parameter ‘__alloc_percpu’
 extern void __percpu *__alloc_percpu(size_t size, size_t align);
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:136:13: error: storage class specified for parameter ‘free_percpu’
 extern void free_percpu(void __percpu *__pdata);
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:137:20: error: storage class specified for parameter ‘per_cpu_ptr_to_phys’
 extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
                    ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:146:22: error: storage class specified for parameter ‘pcpu_nr_pages’
 extern unsigned long pcpu_nr_pages(void);
                      ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:21:0,
                 from pulse.c:16:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:11:2: error: expected specifier-qualifier-list before ‘ktime_t’
  ktime_t expires;
  ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:9:1: warning: empty declaration [enabled by default]
 struct timerqueue_node {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:14:1: warning: empty declaration [enabled by default]
 struct timerqueue_head {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:19:13: error: storage class specified for parameter ‘timerqueue_add’
 extern bool timerqueue_add(struct timerqueue_head *head,
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:21:13: error: storage class specified for parameter ‘timerqueue_del’
 extern bool timerqueue_del(struct timerqueue_head *head,
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:23:32: error: storage class specified for parameter ‘timerqueue_iterate_next’
 extern struct timerqueue_node *timerqueue_iterate_next(
                                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:35:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:42:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:47:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:52:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/timerqueue.h:57:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
In file included from pulse.c:16:0:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:24:1: warning: empty declaration [enabled by default]
 struct hrtimer_clock_base;
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:25:1: warning: empty declaration [enabled by default]
 struct hrtimer_cpu_base;
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:39:1: warning: empty declaration [enabled by default]
 enum hrtimer_mode {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:65:1: warning: empty declaration [enabled by default]
 enum hrtimer_restart {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:120:2: error: expected specifier-qualifier-list before ‘ktime_t’
  ktime_t    _softexpires;
  ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:118:1: warning: empty declaration [enabled by default]
 struct hrtimer {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:138:1: warning: empty declaration [enabled by default]
 struct hrtimer_sleeper {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:165:2: error: expected specifier-qualifier-list before ‘seqcount_t’
  seqcount_t  seq;
  ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:161:1: warning: empty declaration [enabled by default]
 struct hrtimer_clock_base {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:172:1: warning: empty declaration [enabled by default]
 enum  hrtimer_base_type {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:217:2: error: expected specifier-qualifier-list before ‘raw_spinlock_t’
  raw_spinlock_t   lock;
  ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:216:1: warning: empty declaration [enabled by default]
 struct hrtimer_cpu_base {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:242:63: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
                                                               ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:248:69: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta)
                                                                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:248:83: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta)
                                                                                   ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:254:72: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, u64 delta)
                                                                        ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:261:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:266:63: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time)
                                                               ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:273:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:278:23: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_get_expires’
 static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:283:23: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_get_softexpires’
 static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:289:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:293:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:298:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:302:23: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_expires_remaining’
 static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:307:23: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_cb_get_time’
 static inline ktime_t hrtimer_cb_get_time(struct hrtimer *timer)
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:313:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:331:48: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 static inline void clock_was_set_delayed(void) { }
                                                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:336:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘__hrtimer_expires_remaining_adjusted’
 __hrtimer_expires_remaining_adjusted(const struct hrtimer *timer, ktime_t now)
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:350:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_expires_remaining_adjusted’
 hrtimer_expires_remaining_adjusted(const struct hrtimer *timer)
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:356:13: error: storage class specified for parameter ‘clock_was_set’
 extern void clock_was_set(void);
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:360:48: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 static inline void timerfd_clock_was_set(void) { }
                                                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:362:13: error: storage class specified for parameter ‘hrtimers_resume’
 extern void hrtimers_resume(void);
             ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/asm-generic/percpu.h:7:0,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4//arch/riscv/include/generated/asm/percpu.h:1,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu.h:13,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:19,
                 from pulse.c:16:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:364:37: error: storage class specified for parameter ‘tick_cpu_device’
 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
                                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu-defs.h:101:44: note: in definition of macro ‘DECLARE_PER_CPU_SECTION’
  extern __PCPU_ATTRS(sec) __typeof__(type) name
                                            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:364:1: note: in expansion of macro ‘DECLARE_PER_CPU’
 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:364:37: error: section attribute not allowed for ‘tick_cpu_device’
 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
                                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/percpu-defs.h:101:44: note: in definition of macro ‘DECLARE_PER_CPU_SECTION’
  extern __PCPU_ATTRS(sec) __typeof__(type) name
                                            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:364:1: note: in expansion of macro ‘DECLARE_PER_CPU’
 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
 ^
In file included from pulse.c:16:0:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:370:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:378:13: error: storage class specified for parameter ‘hrtimer_init’
 extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock,
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:380:13: error: storage class specified for parameter ‘hrtimer_init_sleeper’
 extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id,
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:395:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:402:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:406:68: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { }
                                                                    ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:410:59: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 extern void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
                                                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:421:57: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 static inline void hrtimer_start(struct hrtimer *timer, ktime_t tim,
                                                         ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:427:12: error: storage class specified for parameter ‘hrtimer_cancel’
 extern int hrtimer_cancel(struct hrtimer *timer);
            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:428:12: error: storage class specified for parameter ‘hrtimer_try_to_cancel’
 extern int hrtimer_try_to_cancel(struct hrtimer *timer);
            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:432:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:445:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:450:16: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘__hrtimer_get_remaining’
 extern ktime_t __hrtimer_get_remaining(const struct hrtimer *timer, bool adjust);
                ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:452:23: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hrtimer_get_remaining’
 static inline ktime_t hrtimer_get_remaining(const struct hrtimer *timer)
                       ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:457:12: error: storage class specified for parameter ‘hrtimer_get_next_event’
 extern u64 hrtimer_get_next_event(void);
            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:458:12: error: storage class specified for parameter ‘hrtimer_next_event_without’
 extern u64 hrtimer_next_event_without(const struct hrtimer *exclude);
            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:460:13: error: storage class specified for parameter ‘hrtimer_active’
 extern bool hrtimer_active(const struct hrtimer *timer);
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:471:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:481:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:487:40: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval);
                                        ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:487:53: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval);
                                                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:506:11: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
           ktime_t interval)
           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:513:12: error: storage class specified for parameter ‘nanosleep_copyout’
 extern int nanosleep_copyout(struct restart_block *, struct timespec64 *);
            ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:514:13: error: storage class specified for parameter ‘hrtimer_nanosleep’
 extern long hrtimer_nanosleep(const struct timespec64 *rqtp,
             ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:518:37: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 extern int schedule_hrtimeout_range(ktime_t *expires, u64 delta,
                                     ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:520:43: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 extern int schedule_hrtimeout_range_clock(ktime_t *expires,
                                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:524:31: error: expected declaration specifiers or ‘...’ before ‘ktime_t’
 extern int schedule_hrtimeout(ktime_t *expires, const enum hrtimer_mode mode);
                               ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:527:13: error: storage class specified for parameter ‘hrtimer_run_queues’
 extern void hrtimer_run_queues(void);
             ^
In file included from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/printk.h:6:0,
                 from /home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/kernel.h:15,
                 from pulse.c:14:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/init.h:50:27: error: expected declaration specifiers or ‘...’ before ‘.’ token
 #define __init  __section(.init.text) __cold  __latent_entropy __noinitretpoline __nocfi
                           ^
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:530:13: note: in expansion of macro ‘__init’
 extern void __init hrtimers_init(void);
             ^
In file included from pulse.c:16:0:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/hrtimer.h:533:13: error: storage class specified for parameter ‘sysrq_timer_list_show’
 extern void sysrq_timer_list_show(void);
             ^
pulse.c:19:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
In file included from pulse.c:14:0:
/home/ubt/tina-d1-h/lichee/linux-5.4/include/linux/kernel.h:328:6: error: old-style parameter declarations in prototyped function definition
 void do_exit(long error_code) __noreturn;
      ^
pulse.c:22:1: error: expected ‘{’ at end of input
 }
 ^
make: *** [pulse.o] Error 1
[2]+  Done                    $T/tools/build/buildserver --path $T 2> /dev/null 1>&2

可以确定肯定不是这么搞的,我还是再去学习下怎么添加驱动程序看看

@yuzukitsuru 好的感谢回复,我以为可以不用写驱动来着

想参考下头文件路径该指定哪里
搜索了package下的文件,都没有调用timer的;
直接搜索整个SDK太大了,在out目录下找到很多,但这里似乎只是存放各种板型生成文件的地方没啥用
总之还是没解决

@yuzukitsuru 代码头文件是这样的

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/hrtimer.h>
#include <linux/jiffies.h>

makefile没有加-l指定路径

#设置编译链路径及工具
CTOOL := riscv64-unknown-linux-gnu-
CCL := /home/ubt/tina-d1-h/prebuilt/gcc/linux-x86/riscv/toolchain-thead-glibc/riscv64-glibc-gcc-thead_20200702
CC := ${CCL}/bin/${CTOOL}gcc

#设置编译规则
timer:timer.c
	${CC} -o timer timer.c

#清理规则
clean:
	rm timer

但是编译时没有报错找不到module.h或者kernel.h

prefix不太清楚我去找一下