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>
---
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
--
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