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-rw-r--r--arch/arm/mach-kirkwood/irq.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/irq.c b/arch/arm/mach-kirkwood/irq.c
index 2a97a2e4163c..2c47a8ad0e27 100644
--- a/arch/arm/mach-kirkwood/irq.c
+++ b/arch/arm/mach-kirkwood/irq.c
@@ -7,6 +7,7 @@
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
+#include <asm/exception.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/irq.h>
@@ -30,11 +31,47 @@ static int __initdata gpio1_irqs[4] = {
0,
};
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+/*
+ * Compiling with both non-DT and DT support enabled, will
+ * break asm irq handler used by non-DT boards. Therefore,
+ * we provide a C-style irq handler even for non-DT boards,
+ * if MULTI_IRQ_HANDLER is set.
+ */
+
+static void __iomem *kirkwood_irq_base = IRQ_VIRT_BASE;
+
+asmlinkage void
+__exception_irq_entry kirkwood_legacy_handle_irq(struct pt_regs *regs)
+{
+ u32 stat;
+
+ stat = readl_relaxed(kirkwood_irq_base + IRQ_CAUSE_LOW_OFF);
+ stat &= readl_relaxed(kirkwood_irq_base + IRQ_MASK_LOW_OFF);
+ if (stat) {
+ unsigned int hwirq = __fls(stat);
+ handle_IRQ(hwirq, regs);
+ return;
+ }
+ stat = readl_relaxed(kirkwood_irq_base + IRQ_CAUSE_HIGH_OFF);
+ stat &= readl_relaxed(kirkwood_irq_base + IRQ_MASK_HIGH_OFF);
+ if (stat) {
+ unsigned int hwirq = 32 + __fls(stat);
+ handle_IRQ(hwirq, regs);
+ return;
+ }
+}
+#endif
+
void __init kirkwood_init_irq(void)
{
orion_irq_init(0, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
orion_irq_init(32, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ set_handle_irq(kirkwood_legacy_handle_irq);
+#endif
+
/*
* Initialize gpiolib for GPIOs 0-49.
*/