哇酷®开发者社区(WhyCan® Forum)

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;
}