mux: Failed to setup hwmod io irq -22

This is generated from inside omap_mux_late_init() function in <linux_dir>/arch/arm/mach-omap2/mux.c:

	ret = request_irq(omap_prcm_event_to_irq("io"),
		omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,
			"hwmod_io", omap_mux_late_init);

	if (ret)
		pr_warning("mux: Failed to setup hwmod io irq %d\n", ret);

You can print the IRQ number returned from omap_prcm_event_to_irq("io").

Error -22 is "Invalid argument". My suggestion to debug this issue is to put prints inside request_threaded_irq() function to see why the -EINVAL error is returned. Of course you should put the condition to only print these messages if the IRQ number is the same as what is returned from omap_prcm_event_to_irq("io").

Best regards,
Miroslav

Hello

thanks for reply

omap_prcm_event_to_irq returns -2   ; where can i find the request_threaded_irq function ?

Best regards

Trichet,

Please use a source code editor with an indexer for viewing/editing the kernel source code. It would be much easier for you to trace where a certain function resides.

The request_threaded_irq() function is inside <linux_dir>/kernel/irq/manage.c.

Best regards,
Miroslav