[PATCH 1/4] ARM: at91: gpio: implement request

[Nicolas Ferre]

On 07/15/2012 03:40 PM, Jean-Christophe PLAGNIOL-VILLARD :
> confire the pin as pio when requested
> 
> Cc: Nicolas Ferre <nicolas.ferre at atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre at atmel.com>

> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> ---
>  arch/arm/mach-at91/gpio.c |   14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
> index 325837a..994ed02 100644
> --- a/arch/arm/mach-at91/gpio.c
> +++ b/arch/arm/mach-at91/gpio.c
> @@ -44,6 +44,7 @@ struct at91_gpio_chip {
>  
>  #define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip, chip)
>  
> +static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset);
>  static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip);
>  static void at91_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val);
>  static int at91_gpiolib_get(struct gpio_chip *chip, unsigned offset);
> @@ -57,6 +58,7 @@ static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset);
>  	{								\
>  		.chip = {						\
>  			.label		  = name,			\
> +			.request	  = at91_gpiolib_request,	\
>  			.direction_input  = at91_gpiolib_direction_input, \
>  			.direction_output = at91_gpiolib_direction_output, \
>  			.get		  = at91_gpiolib_get,		\
> @@ -861,6 +863,18 @@ void __init at91_gpio_irq_setup(void)
>  }
>  
>  /* gpiolib support */
> +
> +
> +static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset)
> +{
> +	struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
> +	void __iomem *pio = at91_gpio->regbase;
> +	unsigned mask = 1 << offset;
> +
> +	__raw_writel(mask, pio + PIO_PER);
> +	return 0;
> +}
> +
>  static int at91_gpiolib_direction_input(struct gpio_chip *chip,
>  					unsigned offset)
>  {
> 


-- 
Nicolas Ferre