x1000: Allow setting IRQ handlers dynamically

Avoids having to #define the names of GPIO pin interrupt handlers,
as they can now be set at runtime instead.

Change-Id: Ib5da1bdb475ff7b64280fe7cdd00adab63389152

1 files changed, 8 insertions, 1 deletions

diff --git a/firmware/target/mips/ingenic_x1000/system-x1000.c b/firmware/target/mips/ingenic_x1000/system-x1000.c
index c0b0dbc65e..779bb2055c 100644
--- a/firmware/target/mips/ingenic_x1000/system-x1000.c
+++ b/firmware/target/mips/ingenic_x1000/system-x1000.c
@@ -233,7 +233,7 @@ intr(OST);
 
 #undef intr
 
-static void(*const irqvector[])(void) = {
+static void(*irqvector[])(void) = {
     /* ICSR0: 0 - 31 */
     DMIC,   AIC,    UIRQ,   UIRQ,   UIRQ,   UIRQ,   UIRQ,   SFC,
     SSI0,   UIRQ,   PDMA,   PDMAD,  UIRQ,   UIRQ,   UIRQ,   UIRQ,
@@ -263,6 +263,13 @@ static void(*const irqvector[])(void) = {
     GPIOD00, GPIOD01, GPIOD02, GPIOD03, GPIOD04, GPIOD05,
 };
 
+irq_handler_t system_set_irq_handler(int irq, irq_handler_t handler)
+{
+    irq_handler_t old_handler = irqvector[irq];
+    irqvector[irq] = handler;
+    return old_handler;
+}
+
 void system_enable_irq(int irq)
 {
     if(IRQ_IS_GROUP0(irq)) {