linux-kernel - Re: [PATCH v3 1/2] mmc: mmci.c: Defer probe() in case of yet uninitialized GPIOs

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Message-ID: <CACRpkdaVciTXZ0XY5RvWzHPwh5iXQ7DVSD48K7prgmY0WdyF9g@mail.gmail.com>
Date:	Sun, 17 Jun 2012 20:01:21 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Roland Stigge <stigge@...com.de>
Cc:	cjb@...top.org, grant.likely@...retlab.ca, rob.herring@...xeda.com,
	rmk+kernel@....linux.org.uk, ulf.hansson@...ricsson.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	aletes.xgr@...il.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/2] mmc: mmci.c: Defer probe() in case of yet
 uninitialized GPIOs

On Sun, Jun 17, 2012 at 12:11 PM, Roland Stigge <stigge@...com.de> wrote:

> If the GPIOs used by the MMCI driver are not registered yet when the driver is
> probe()d, they can't be used. This happens if the mmci driver is probed before
> the respective GPIO controller (e.g. on the LPC32xx EA3250 board, the PCA9532
> GPIO controller would be initialized via DT after mmci). Therefore, we defer
> mmci in this case.
>
> Signed-off-by: Roland Stigge <stigge@...com.de>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Pls put this into Russell's patch tracker.

Yours,
Linus Walleij
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