[U-Boot] [PATCH 2/3] omap3evm: Update ethernet reset sequence for Rev.G board

[Igor Grinberg]

Hi Sanjeev,

On 06/22/11 22:24, Sanjeev Premi wrote:
> From: Sriramakrishnan <srk at ti.com>
>
> The GPIO pin used for resetting the external LAN chip has
> changed for Rev.G board.
>
> Signed-off-by: Sriramakrishnan <srk at ti.com>
> Signed-off-by: Sanjeev Premi <premi at ti.com>
> ---
>  board/ti/evm/evm.c |   27 ++++++++++++++++++---------
>  1 files changed, 18 insertions(+), 9 deletions(-)
>
> diff --git a/board/ti/evm/evm.c b/board/ti/evm/evm.c
> index 8f9f141..57e5fa5 100644
> --- a/board/ti/evm/evm.c
> +++ b/board/ti/evm/evm.c
> @@ -181,17 +181,26 @@ static void setup_net_chip(void)
>   */
>  static void reset_net_chip(void)
>  {
> -	struct gpio *gpio3_base = (struct gpio *)OMAP34XX_GPIO3_BASE;
> -
> -	/* Make GPIO 64 as output pin */
> -	writel(readl(&gpio3_base->oe) & ~(GPIO0), &gpio3_base->oe);
> -
> -	/* Now send a pulse on the GPIO pin */
> -	writel(GPIO0, &gpio3_base->setdataout);
> +	struct gpio *gpio_base;
> +	u32 pin;
> +
> +	if (get_omap3_evm_rev() == OMAP3EVM_BOARD_GEN_1) {
> +		gpio_base = (struct gpio *)OMAP34XX_GPIO3_BASE;
> +		pin = GPIO0;	/* Output pin: GPIO Bank 3, pin 0 */
> +	} else {
> +		gpio_base = (struct gpio *)OMAP34XX_GPIO1_BASE;
> +		pin = GPIO7;	/* Output pin: GPIO Bank 0, pin 7 */
> +	}
> +
> +	/* Configure the pin as output */
> +	writel(readl(&gpio_base->oe) & ~(pin), &gpio_base->oe);
> +
> +	/* Send a pulse on the GPIO pin */
> +	writel(pin, &gpio_base->setdataout);
>  	udelay(1);
> -	writel(GPIO0, &gpio3_base->cleardataout);
> +	writel(pin, &gpio_base->cleardataout);
>  	udelay(1);
> -	writel(GPIO0, &gpio3_base->setdataout);
> +	writel(pin, &gpio_base->setdataout);

Why keep messing with the gpio registers?
Why not use gpio framework?
Though it is omap specific, but it will be much cleaner then the above.


-- 
Regards,
Igor.