kbc: Add reset function

This function can be called after EC init to put the KBC into a known
working state.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/board/system76/common/include/board/kbc.h

@@ -10,6 +10,7 @@
 extern uint8_t kbc_leds;
 
 void kbc_init(void);
+void kbc_reset(void);
 bool kbc_scancode(uint16_t key, bool pressed);
 void kbc_event(struct Kbc *kbc);
 

src/board/system76/common/kbc.c

@@ -18,6 +18,11 @@ void kbc_init(void) {
     // Set IRQ mode to level-triggered
     *(KBC.irq) = 0;
 #endif
+
+    kbc_reset();
+}
+
+void kbc_reset(void) {
     // Set "key lock" to disabled
     *(KBC.status) = BIT(4);
 }

src/ec/ite/include/ec/kbc.h

@@ -8,8 +8,6 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-void kbc_init(void);
-
 struct Kbc {
     // Control register
     volatile uint8_t *control;