WhyCan Forum(哇酷开发者社区)

100s芯片内置的硬件定时器，配置了相关寄存器后，一直不触发中断，是哪里的问题，各位大佬帮忙看看,下面是部分驱动代码：

static irqreturn_t timer_handler(int irq, void *dev_id)
{
    printk("%s %d %s\n",__FILE__,__LINE__,__FUNCTION__);
    writel(readl(TIMER_IRQ_ST_Register)|(1<<1), TIMER_IRQ_ST_Register);//清pending
    return IRQ_HANDLED;
}

static ssize_t hw_timer_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
{

    int val;
    copy_from_user(&val, buf, count); //    copy_to_user();

    writel(val, TIMER1_INTVAL_Rigster);//12000为定时1ms
   
    // printk("%x\n",readl(TIMER0_INTVAL_Rigster));
    // printk("%x\n",readl(TIMER0_CNTVAL_Rigster));
   
    /*24M,Single mode,2 precale*/
    writel(0x94, TIMER1_CTRL_Rister);
    writel(readl(TIMER1_CTRL_Rister)|(1<<1), TIMER1_CTRL_Rister);
   
    while((readl(TIMER1_CTRL_Rister)>>1)&1);
   
    writel(readl(TIMER1_CTRL_Rister)|(1<<0), TIMER1_CTRL_Rister);//使能定时器
}

static struct file_operations hw_timer_fops = {
    .owner  =   THIS_MODULE,    /* 这是一个宏，推向编译模块时自动创建的__this_module变量 */
    .open   =   hw_timer_open,     
    .write    =    hw_timer_write,      
    .read   =     hw_timer_read,
};

int major;
int init_timer_module(void)
{
    int ret;
    major = register_chrdev(0, "hw_timer", &hw_timer_fops);

    hwtimerdrv_cls = class_create(THIS_MODULE, "hw_timer");

    hwtimercls_device = device_create(hwtimerdrv_cls, NULL, MKDEV(major, 0), NULL, "timer0"); /* /dev/buttons */

    TIMER_IRQ_EN_Register = (volatile unsigned long *)ioremap(TIMER_BASE+TIMER_IRQ_EN_REG,4);   
   
    TIMER_IRQ_ST_Register = (volatile unsigned long *)ioremap(TIMER_BASE+TIMER_IRQ_ST_REG,4);
TIMER1_CTRL_Rister = (volatile unsigned long *)ioremap(TIMER_BASE+TIMER_CTL_REG(1),4);
    TIMER1_INTVAL_Rigster = (volatile unsigned long *)ioremap(TIMER_BASE+TIMER_INTVAL_REG(1),4);
    TIMER1_CNTVAL_Rigster = (volatile unsigned long *)ioremap(TIMER_BASE+TIMER_CNTVAL_REG(1),4);
   
    // writel(1200000, TIMER0_INTVAL_Rigster);//
    writel(readl(TIMER_IRQ_EN_Register)|(1<<1), TIMER_IRQ_EN_Register);//使能定时器1中断
    /*申请中断*/
if (request_irq(14, (irq_handler_t )timer_handler, 0,"sunxi_timer1", NULL))
    {
            printk("irq request failure\n");
            return -1;
    }
      return 0;
}