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SubjectRe: [PATCH] Define a NO_GPIO macro to compare against and to use as an invalid GPIO
On Thu, 31 Jan 2008, Guennadi Liakhovetski wrote:

> As discussed on i2c mailing list with David Brownell, and number
> outside of the 0...MAX_INT range is invalid as a GPIO number.
> Define a macro, similar to NO_IRQ, to be used as a deliberate
> invalid GPIO, rather than defining a is_valid_gpio() macro.

David, I think, your ack is required on this one. Can we get it in,
please? My soc-camera patches are accepted by the v4l maintainer, and
without this one the series would be incomplete.

Thanks
Guennadi

> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
>
> ---
>
> As gpiolib doesn't seem to have an own mailing list, sending it directly
> to LKML.
>
> include/asm-generic/gpio.h | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
> index f29a502..806b86c 100644
> --- a/include/asm-generic/gpio.h
> +++ b/include/asm-generic/gpio.h
> @@ -16,6 +16,10 @@
> #define ARCH_NR_GPIOS 256
> #endif
>
> +#ifndef NO_GPIO
> +#define NO_GPIO ((unsigned int)-1)
> +#endif
> +
> struct seq_file;
>
> /**
> --
> 1.5.3.4
>

---
Guennadi Liakhovetski


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