From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Timo Teras <timo.teras@solidboot.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] MMC: Select only one voltage bit in OCR response
Date: Mon, 16 Oct 2006 08:34:20 +0200 [thread overview]
Message-ID: <453327EC.1000402@drzeus.cx> (raw)
In-Reply-To: <20061009172350.GC1637@mail.solidboot.com>
Timo Teras wrote:
> I see. But if we do send an OCR with an unsupported bit set, the card will
> go to inactive state and is unusable. This problem is masked on controllers
> with only 3.3V support, but I'm working with a controller supporting several
> different voltages.
>
> For example, I have a card giving an OCR reply of 0x0ff80080. The current
> code will reply to this with 0x00000180 which is clearly incorrect.
>
> Maybe something like "ocr &= 3 << bit;" would be more approriate?
>
Russell? Comments? Do you still have the offending card?
--
-- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org
PulseAudio, core developer http://pulseaudio.org
rdesktop, core developer http://www.rdesktop.org
OLPC, developer http://www.laptop.org
next prev parent reply other threads:[~2006-10-16 6:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-09 15:00 [PATCH] MMC: Select only one voltage bit in OCR response Timo Teras
2006-10-09 16:53 ` Russell King
2006-10-09 17:23 ` Timo Teras
2006-10-16 6:34 ` Pierre Ossman [this message]
2006-10-22 9:25 ` Pierre Ossman
2006-10-31 10:05 ` Russell King
2006-10-31 15:24 ` Juha Yrjola
2006-11-02 18:37 ` Pierre Ossman
2006-10-10 13:23 ` [PATCH] MMC: Do not set unsupported bits " Timo Teras
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