From: Thomas Abraham Date: Thu, 6 Sep 2012 21:07:19 +0000 (+0900) Subject: gpio: exynos4: skip gpiolib registration if pinctrl driver is used X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=d05866240cce588bedf544b0350bad9d279a64cf;p=~shefty%2Frdma-dev.git gpio: exynos4: skip gpiolib registration if pinctrl driver is used 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 Acked-by: Grant Likely Acked-by: Linus Walleij Signed-off-by: Kukjin Kim --- diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c index ba126cc0407..41ab7f66cdf 100644 --- a/drivers/gpio/gpio-samsung.c +++ b/drivers/gpio/gpio-samsung.c @@ -2734,6 +2734,27 @@ static __init void exynos4_gpiolib_init(void) int group = 0; void __iomem *gpx_base; +#ifdef CONFIG_PINCTRL_SAMSUNG + /* + * 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; +#endif + /* gpio part1 */ gpio_base1 = ioremap(EXYNOS4_PA_GPIO1, SZ_4K); if (gpio_base1 == NULL) {