ps2: add gpio for output IRQ and optionally use it in ps2_raise_irq() and ps2_lower_irq()

Define the gpio for the PS2 output IRQ in ps2_init() and add logic to optionally
use it in ps2_raise_irq() and ps2_lower_irq() if the gpio is connected. If the
gpio is not connected then call the legacy update_irq() function as before.

This allows the incremental conversion of devices from the legacy update_irq()
function to use gpios instead.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Helge Deller <deller@gmx.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220624134109.881989-35-mark.cave-ayland@ilande.co.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/hw/input/ps2.h b/include/hw/input/ps2.h
index 410ec66baf..5422aee9aa 100644
--- a/include/hw/input/ps2.h
+++ b/include/hw/input/ps2.h
@@ -50,11 +50,15 @@ typedef struct {
     int rptr, wptr, cwptr, count;
 } PS2Queue;
 
+/* Output IRQ */
+#define PS2_DEVICE_IRQ      0
+
 struct PS2State {
     SysBusDevice parent_obj;
 
     PS2Queue queue;
     int32_t write_cmd;
+    qemu_irq irq;
     void (*update_irq)(void *, int);
     void *update_arg;
 };