1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-orion5x/irq.c b/arch/arm/mach-orion5x/irq.c
new file mode 100644
index 0000000000..e17727e53c
--- /dev/null
+++ b/arch/arm/mach-orion5x/irq.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arch/arm/mach-orion5x/irq.c
+ *
+ * Core IRQ functions for Marvell Orion System On Chip
+ *
+ * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
+ */
+#include <linux/gpio.h>
+#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <plat/orion-gpio.h>
+#include <plat/irq.h>
+#include <asm/exception.h>
+#include "bridge-regs.h"
+#include "common.h"
+
+static int __initdata gpio0_irqs[4] = {
+	IRQ_ORION5X_GPIO_0_7,
+	IRQ_ORION5X_GPIO_8_15,
+	IRQ_ORION5X_GPIO_16_23,
+	IRQ_ORION5X_GPIO_24_31,
+};
+
+static asmlinkage void
+__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
+{
+	u32 stat;
+
+	stat = readl_relaxed(MAIN_IRQ_CAUSE);
+	stat &= readl_relaxed(MAIN_IRQ_MASK);
+	if (stat) {
+		unsigned int hwirq = 1 + __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+}
+
+void __init orion5x_init_irq(void)
+{
+	orion_irq_init(1, MAIN_IRQ_MASK);
+
+	set_handle_irq(orion5x_legacy_handle_irq);
+
+	/*
+	 * Initialize gpiolib for GPIOs 0-31.
+	 */
+	orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0,
+			IRQ_ORION5X_GPIO_START, gpio0_irqs);
+}