RE: sdio irq hack for omap_hsmmc.c (was: Re: [PATCH] OMAP35xx:SDIO IRQ Support for OMAP35xx)

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It is hard to comment on what is happening here without a patch. Is it a
performance issue or that SDIO functionality failure with PM enabled?

The MMC controller supports wakeup capability on the dat1 line using a GPIO
for a SDIO interrupt. I guess that should help.

Regards,
Madhu

> -----Original Message-----
> From: John Rigby [mailto:jcrigby@xxxxxxxxx]
> Sent: Tuesday, January 26, 2010 11:05 AM
> To: Mike Rapoport
> Cc: Dirk Behme; Phaneendra Kumar Alapati; linux-omap@xxxxxxxxxxxxxxx;
> Madhusudhan Chikkature; linux-mmc@xxxxxxxxxxxxxxx; Adrian Hunter;
> Paasikivi Teemu.3 (EXT-Ixonos/Tampere)
> Subject: sdio irq hack for omap_hsmmc.c (was: Re: [PATCH] OMAP35xx:SDIO
> IRQ Support for OMAP35xx)
> 
> Attached is a hacked omap_hsmmc.c which works with libertas on my
> board (very similar to beagle).  This is not intended to be a solution
> but points in the direction of the problem.  I ripped out the
> CONFIG_PM code and turned off all the enable/disable stuff.  I also
> explicitly turn on the fclk at probe time.  I get about 11 Mbits/sec
> throughput with this.
> 
> Again this is a hack but it shows that the likely problem has
> something to do with the enable/disable code.  I appears that the
> controller is disabled (fclk turned off) and sdio irqs get dropped as
> a result.

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