linux-kernel - Re: [PATCH 1/3] at91_mci: Enable MMC_CAP_SDIO

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Message-Id: <1216547739.3200.5.camel@wirenth>
Date:	Sun, 20 Jul 2008 10:55:39 +0100
From:	ian <spyro@....com>
To:	Pierre Ossman <drzeus@...eus.cx>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	ARM Linux Mailing List 
	<linux-arm-kernel@...ts.arm.linux.org.uk>,
	Andrew Victor <linux@...im.org.za>
Subject: Re: [PATCH 1/3] at91_mci: Enable MMC_CAP_SDIO_IRQ only when it
	actually works

On Sat, 2008-07-19 at 01:01 +0200, Pierre Ossman wrote:
> > In your opinion, a printed warning that says to be sure to use only 
> > 4-bit mode SDIO cards on slot B... is not acceptable ?
> 
> It's not really up to the user. The SDIO spec does not mandate 4-bit
> support, so some cards will not have it.

That seems overly rigid.

its not linux violating the spec, its the SDIO controller in this case.

I see no harm in supporting what the hardware is actually capable of.

It wouldnt be the first bit of broken hardware supported by linux.

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