My Driver Code :
/*
* ISR for PWM Counter
*/
static irqreturn_t pwm_cnt_interrupt(int irq, void *data)
{
printk("==> %s\r\n", __func__);
//ecap_configure(globle_dev);
//ecap_intr_event(globle_dev);
return IRQ_HANDLED;
}
static int ecap_cnt_probe(struct platform_device *pdev)
{
printk("KARTHIK ==> %s\r\n", __func__);
struct device_node *np = pdev->dev.of_node;
int ret, ecapirq;
struct resource *r;
struct clk *clk;
struct ecap_device *pc;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
if (!pc)
return -ENOMEM;
clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(clk)) {
if (of_device_is_compatible(np, "ti,counter-ecap")) {
dev_warn(&pdev->dev, "Binding is obsolete.\n");
clk = devm_clk_get(pdev->dev.parent, "fck");
}
}
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
return PTR_ERR(clk);
}
pc->clk_rate = clk_get_rate(clk);
if (!pc->clk_rate) {
dev_err(&pdev->dev, "failed to get clock rate\n");
return -EINVAL;
}
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(pc->mmio_base))
return PTR_ERR(pc->mmio_base);
globle_dev = pc;
/* Get PWM IRQ number */
ecapirq = platform_get_irq(pdev, 0);
if (ecapirq < 0) {
printk(KERN_ERR "Could not get IRQ");
return -EINVAL;
}
printk(KERN_DEBUG "irq = %d\n", ecapirq);
oreore_dentry = debugfs_create_file("counter", 0666, NULL, &value, &fops);
if(request_irq(ecapirq, pwm_cnt_interrupt, IRQF_SHARED,
"counter", (void *)&counter)) {
printk(KERN_ERR "pwm counter: Can't allocate irq %d\n",
ecapirq);
return -EBUSY;
}
INIT_DELAYED_WORK(&pc->work, capture_polling);
mutex_init(&pc->counter);
platform_set_drvdata(pdev, pc);
printk("TP7 ==> %s\r\n", __func__);
return 0;
}
My Interrupt got registed in /proc/interrupts But, Its not get triggered.
Kernel Log:
#cat /proc/interrupts
190: 1 INTC 37 Level SGX ISR
191: 0 INTC 7 Level txsky button
192: 0 INTC 31 Level counter
194: 8 INTC 18 Level musb-hdrc.0
195: 8 INTC 19 Level musb-hdrc.1
I have connected UART with my pwm interrupt pin. I m sending data using uart port. my irq handler is not get called at that time.
Can anyone help me resolve this issue.
