summaryrefslogtreecommitdiff
path: root/drivers/gpio
diff options
context:
space:
mode:
authorThomas Abraham <thomas.abraham@linaro.org>2012-09-07 06:07:19 +0900
committerKukjin Kim <kgene.kim@samsung.com>2012-09-07 06:07:19 +0900
commitd05866240cce588bedf544b0350bad9d279a64cf (patch)
tree4019bf42912f40c4907b550e6ee7a7a5bc751108 /drivers/gpio
parent43b169db184184e1df8dea198d454a06602c5150 (diff)
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 <thomas.abraham@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-samsung.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index ba126cc04073..41ab7f66cdf9 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) {