On Thu, 24 May 2012 05:17:37 +0530, Thomas Abraham <thomas.abra...@linaro.org>
wrote:
> Pinctrl driver, when enabled, registers all the gpio pins and hence the
> registration of gpio pins by this driver can be skipped.
>
> Signed-off-by: Thomas Abraham <thomas.abra...@linaro.org>
Acked-by: Grant Likely <grant.lik...@secretlab.ca>
> ---
> drivers/gpio/gpio-samsung.c | 21 +++++++++++++++++++++
> 1 files changed, 21 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
> index 19d6fc0..34a9638 100644
> --- a/drivers/gpio/gpio-samsung.c
> +++ b/drivers/gpio/gpio-samsung.c
> @@ -2788,6 +2788,27 @@ static __init int samsung_gpiolib_init(void)
> #ifdef CONFIG_CPU_EXYNOS4210
> void __iomem *gpx_base;
>
> +#ifdef CONFIG_OF
> + /*
> + * This gpio driver includes support for device tree support and
> + * there are platforms using it. In order to maintain
> + * compatibility with those platforms, and to allow non-dt
> + * Exynos4210 platforms to use this gpiolib support, a check
> + * is added to find out if there is a active pin-controller
> + * driver support available. If it is available, this gpiolib
> + * support is ignored and the gpiolib support available in
> + * pin-controller driver is used. This is a temporary check and
> + * will go away when all of the Exynos4210 platforms have
> + * switched to using device tree and the pin-ctrl driver.
> + */
> + struct device_node *pctrl_np;
> + const char *pctrl_compat = "samsung,pinctrl-exynos4210";
> + pctrl_np = of_find_compatible_node(NULL, NULL, pctrl_compat);
> + if (pctrl_np)
> + if (of_device_is_available(pctrl_np))
> + return -ENODEV;
> +#endif
> +
> /* gpio part1 */
> gpio_base1 = ioremap(EXYNOS4_PA_GPIO1, SZ_4K);
> if (gpio_base1 == NULL) {
> --
> 1.6.6.rc2
>
--
Grant Likely, B.Sc, P.Eng.
Secret Lab Technologies, Ltd.
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