linux-kernel - Re: [PATCH 2/2] gpiolib: introduce gpio_set

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Message-ID: <20111125141444.GA13747@legolas.emea.dhcp.ti.com>
Date:	Fri, 25 Nov 2011 16:14:46 +0200
From:	Felipe Balbi <balbi@...com>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	linux-kernel@...r.kernel.org,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH 2/2] gpiolib: introduce gpio_set_deglitch

Hi,

On Fri, Nov 25, 2011 at 03:08:40PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> this will allow to manage the Glitch Input Filter
> as present on AT91 as example
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> ---
>  drivers/gpio/gpiolib.c     |   44 ++++++++++++++++++++++++++++++++++++++++++++
>  include/asm-generic/gpio.h |    4 ++++
>  include/linux/gpio.h       |    5 +++++
>  3 files changed, 53 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index b7e5e75..d2b1833 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -1563,6 +1563,50 @@ fail:
>  }
>  EXPORT_SYMBOL_GPL(gpio_set_pullup);
>  
> +/**
> + * gpio_set_deglitch - sets @deglitch for a @gpio
> + * @gpio: the gpio to set deglitch
> + * @deglitch: deglitch level
> + */
> +int gpio_set_deglitch(unsigned gpio, unsigned deglitch)

sounds a lot like debounce, what's the difference ?

-- 
balbi

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