imx6的PWM计数

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/******Pwm.h中****************/
struct pwm_device {
	struct list_head	node;
	struct platform_device *pdev;

	const char	*label;
	struct clk	*clk;

	int		clk_enabled;
	void __iomem	*mmio_base;

	unsigned int	use_count;
	unsigned int	pwm_id;
	int		pwmo_invert;

	int		irq;   /*新添加*/
	void (*enable_pwm_pad)(void);
	void (*disable_pwm_pad)(void);
};
/*添加以下中断要用的函数*/
int pwm_irq_enable(struct pwm_device *pwm); /*使能*/
int pwm_irq_disable(struct pwm_device *pwm);/*失能*/
int pwm_irq_clearflags(struct pwm_device *pwm); /*清除标志位*/
int pwm_irq_stop(struct pwm_device *pwm);/*停止中断*/
/******Pwm.c中****************/
static int __devinit mxc_pwm_probe(struct platform_device *pdev)
{
    /*此处省略n行代码*/
	pwm->irq = platform_get_irq(pdev, 0); /*获取中断号*/
	if (pwm->irq < 0) {
		ret = -EINVAL;
	}
}


///PWM interrupt config//
///config fifo interrupt/
int pwm_irq_enable(struct pwm_device *pwm)
{
	unsigned long reg;
	reg = readl(pwm->mmio_base + MX3_PWMMIR);
	reg |=MX3_PWM_ROV_IRQ_EN;
	writel(reg,pwm->mmio_base + MX3_PWMMIR);
}
EXPORT_SYMBOL(pwm_irq_enable);
/*添加以下函数与宏定义*/
#define MX3_PWMMIR               		0x08    /* PWM interrupt Register */
#define MX3_PWMFIFOIRQ_EN              (1 << 0)
#define MX3_PWM_ROV_IRQ_EN              (1 << 1)

#define MX3_PWMSR            			0x04   /* PWM statues Register */
#define MX3_PWM_ROV_EN              (1 << 4)

int pwm_irq_disable(struct pwm_device *pwm)
{
	/*unsigned long reg;
	reg = readl(pwm->mmio_base + MX3_PWMMIR);
	reg &=~ MX3_PWM_ROV_IRQ_EN;*/
	writel(0,pwm->mmio_base + MX3_PWMMIR);
}
EXPORT_SYMBOL(pwm_irq_disable);

int pwm_irq_clearflags(struct pwm_device *pwm)
{
	unsigned long reg;
	reg = readl(pwm->mmio_base + MX3_PWMSR);
	reg |= MX3_PWM_ROV_EN;
	writel(reg,pwm->mmio_base + MX3_PWMSR);
}
EXPORT_SYMBOL(pwm_irq_clearflags);

int pwm_irq_stop(struct pwm_device *pwm)
{
	writel(0,pwm->mmio_base + MX3_PWMCR);
}
EXPORT_SYMBOL(pwm_irq_stop);

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int pwm_irq(struct pwm_device *pwm)
{
	int d1;
	d1=pwm->irq;
	printk("d1=%d!rn",d1);
	return d1;
}
/*在某函数调用*/
	d1= pwm_irq(pwm_dev_2);
 	pwm_irq_enable(pwm_dev_2);
	ret = request_irq(d1,pwm1_isr,0,"PWM1",pwm_dev_2);