1 files changed, 26 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 4eb39cdf75ea..715b690e5009 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -980,6 +980,32 @@ static int __init exynos_init_irq_eint(void)
 {
         int irq;
 
+#ifdef CONFIG_PINCTRL_SAMSUNG
+        /*
+         * The Samsung pinctrl driver provides an integrated gpio/pinmux/pinconf
+         * functionality along with support for external gpio and wakeup
+         * interrupts. If the samsung pinctrl driver is enabled and includes
+         * the wakeup interrupt support, then the setting up external wakeup
+         * interrupts here can be skipped. This check here is temporary to
+         * allow exynos4 platforms that do not use Samsung pinctrl driver to
+         * co-exist with platforms that do. When all of the Samsung Exynos4
+         * platforms switch over to using the pinctrl driver, the wakeup
+         * interrupt support code here can be completely removed.
+         */
+        struct device_node *pctrl_np, *wkup_np;
+        const char *pctrl_compat = "samsung,pinctrl-exynos4210";
+        const char *wkup_compat = "samsung,exynos4210-wakeup-eint";
+
+        for_each_compatible_node(pctrl_np, NULL, pctrl_compat) {
+                if (of_device_is_available(pctrl_np)) {
+                        wkup_np = of_find_compatible_node(pctrl_np, NULL,
+                                                        wkup_compat);
+                        if (wkup_np)
+                                return -ENODEV;
+                }
+        }
+#endif
+
         if (soc_is_exynos5250())
                 exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
         else