linux-kernel - RE: [PATCH] leds-pca9532: Add gpio capability v3

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Date:	Tue, 1 Feb 2011 13:48:05 -0600
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Joachim Eastwood <manabian@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"riku.voipio@....fi" <riku.voipio@....fi>
CC:	"joachim.eastwood@...ron.com" <joachim.eastwood@...ron.com>,
	"w.sang@...gutronix.de" <w.sang@...gutronix.de>
Subject: RE: [PATCH] leds-pca9532: Add gpio capability v3

On Tuesday, February 01, 2011 12:41 PM, Joachim Eastwood wrote:
> Hello,
> 
> The patch below allows unused leds on pca9532 to be used as gpio. The
> board I am working on now has no less than 6 pca9532 chips. One chips
> is used for only leds, one has 14 leds and 2 gpio and the rest of the
> chips are gpio only.
> 
> There is also one board in mainline which could use this capabilty;
> arch/arm/mach-iop32x/n2100.c
>  232         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
>  233         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
> 
> This patch defines a new pin type, PCA9532_TYPE_GPIO, and registers a
> gpiochip if any pin has this type set. The gpio will registers all
> chip pins but will filter on gpio_request.
> 
> Changes in v3:
> * Fixed direction_output funtion, thanks to H Hartley Sweeten
> * direction_input now calles set_value as direction_output
> * Instructions in Kconfig
> 
> Tested on custom ARM board.
> 
> -------------------------------------------------------------------
>     [leds-pca9532] Add gpio capability
> 
>     Pins not used for leds can now be used as gpio by setting pin type as
>     PCA9532_TYPE_GPIO and defining a gpio_base in platform data.
> 
>     Signed-off-by: Joachim Eastwood <joachim.eastwood@...ron.com>
>     Reviewed-by: Wolfram Sang <w.sang@...gutronix.de>

Looks good.

Reviewed-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
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