ARM: mxs: add gpio support for device tree boot

It adds gpio support for device tree boot.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
index 182ea7529d28..8cac94b33020 100644
--- a/arch/arm/mach-mxs/mach-mxs.c
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -30,8 +30,20 @@ static int __init mxs_icoll_add_irq_domain(struct device_node *np,
         return 0;
 }
 
+static int __init mxs_gpio_add_irq_domain(struct device_node *np,
+                                struct device_node *interrupt_parent)
+{
+        static int gpio_irq_base = MXS_GPIO_IRQ_START;
+
+        irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
+        gpio_irq_base += 32;
+
+        return 0;
+}
+
 static const struct of_device_id mxs_irq_match[] __initconst = {
         { .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
+        { .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
         { /* sentinel */ }
 };