Subject: [BISECTED] 3.10-rc1 OMAP1 GPIO IRQ regression

From: [email-masked] (Tony Lindgren)
Date: Thu, 16 May 2013 11:09:34 -0700

* Aaro Koskinen <[email-masked]> [130513 13:58]:
> Hi,
> 
> I tested 3.10-rc1 on OMAP1 / Nokia 770, and Retu MFD probe is broken:
> 
> [    2.264221] retu-mfd 2-0001: Retu v3.2 found
> [    2.281951] retu-mfd 2-0001: Failed to allocate IRQs: -12
> [    2.300140] retu-mfd: probe of 2-0001 failed with error -12
> 
> The error is coming from regmap code. According to git bisect, it is
> caused by:
> 
> 	commit ede4d7a5b9835510fd1f724367f68d2fa4128453
> 	Author: Jon Hunter <[email-masked]>
> 	Date:   Fri Mar 1 11:22:47 2013 -0600
> 
> 	    gpio/omap: convert gpio irq domain to linear mapping
> 
> The commit does not anymore revert cleanly, and I haven't yet tried
> crafting a manual revert, so any fix proposals/ideas are welcome...

Hmm this might be a bit trickier to fix. Obviously the real solution
is to convert omap1 to SPARSE_IRQ like we did for omap2+.

For the -rc cycle, it might be possible to fix this by adding a
different irq_to_gpio() and gpio_to_irq() functions for omap1.

Regards,

Tony