linux-kernel - Re: [PATCH 3/3 v2] at91/atmel-mci: inclusion of sd/mmc driver in at91sam9g45 chip and board

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Date:	Tue, 03 Nov 2009 09:10:30 +1100
From:	Ben Nizette <bn@...sdigital.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	Andrew Victor <avictor.za@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	"\"\\\"Thiago A.\\\"" Corrêa" 
	<thiago.correa@...il.com>, kernel@...32linux.org,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 3/3 v2] at91/atmel-mci: inclusion of sd/mmc driver in
 at91sam9g45 chip and board

On Mon, 2009-11-02 at 18:11 +0100, Nicolas Ferre wrote:
> Ben Nizette :
> > 
> > static inline int gpio_is_valid(int number)
> > {
> > 	/* only some non-negative numbers are valid */
> > 	return ((unsigned)number) < ARCH_NR_GPIOS;
> > }
> 
> I understand that the better way to solve this issue is to:
> - keep the AT91 way of specifying not connected pins (= 0)
> - code the gpio_is_valid() function for at91 that tests this way of
> handling not connected gpio
> 


> I see that in arch/arm/mach-at91/include/mach/gpio.h
> we include the asm-generic/gpio.h file... must I implement the full set
> of gpiolib ?



> 
> Best regards,

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