Implement support for using GPIO pins as interrupt pins.

ok kn@

2 files changed, 36 insertions, 2 deletions

diff --git a/sys/dev/ofw/ofw_gpio.c b/sys/dev/ofw/ofw_gpio.c
index f8f818e8fb1..929a87aea84 100644
--- a/sys/dev/ofw/ofw_gpio.c
+++ b/sys/dev/ofw/ofw_gpio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ofw_gpio.c,v 1.3 2019/08/26 09:22:27 kettenis Exp $	*/
+/*	$OpenBSD: ofw_gpio.c,v 1.4 2025/01/09 19:38:13 kettenis Exp $	*/
 /*
  * Copyright (c) 2016, 2019 Mark Kettenis
  *
@@ -19,6 +19,8 @@
 #include <sys/systm.h>
 #include <sys/malloc.h>
 
+#include <machine/fdt.h>
+
 #include <dev/ofw/openfirm.h>
 #include <dev/ofw/ofw_gpio.h>
 
@@ -141,3 +143,29 @@ gpio_controller_next_pin(uint32_t *cells)
 
 	return NULL;
 }
+
+void *
+gpio_controller_intr_establish(uint32_t *cells, int ipl, struct cpu_info *ci,
+    int (*func)(void *), void *arg, char *name)
+{
+	struct gpio_controller *gc;
+	uint32_t phandle = cells[0];
+
+	LIST_FOREACH(gc, &gpio_controllers, gc_list) {
+		if (gc->gc_phandle == phandle)
+			break;
+	}
+
+	if (gc && gc->gc_intr_establish) {
+		return gc->gc_intr_establish(gc->gc_cookie, &cells[1], ipl,
+		    ci, func, arg, name);
+	}
+
+	return NULL;
+}
+
+void
+gpio_controller_intr_disestablish(void *ih)
+{
+	fdt_intr_disestablish(ih);
+}
diff --git a/sys/dev/ofw/ofw_gpio.h b/sys/dev/ofw/ofw_gpio.h
index 95bcea95351..027dfc484d8 100644
--- a/sys/dev/ofw/ofw_gpio.h
+++ b/sys/dev/ofw/ofw_gpio.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ofw_gpio.h,v 1.5 2020/12/18 22:14:13 kettenis Exp $	*/
+/*	$OpenBSD: ofw_gpio.h,v 1.6 2025/01/09 19:38:13 kettenis Exp $	*/
 /*
  * Copyright (c) 2016 Mark Kettenis
  *
@@ -34,6 +34,8 @@ struct gpio_controller {
 	void	(*gc_config_pin)(void *, uint32_t *, int);
 	int	(*gc_get_pin)(void *, uint32_t *);
 	void	(*gc_set_pin)(void *, uint32_t *, int);
+	void	*(*gc_intr_establish)(void *, uint32_t *, int,
+		    struct cpu_info *, int (*)(void *), void *, char *);
 
 	LIST_ENTRY(gpio_controller) gc_list;
 	uint32_t gc_phandle;
@@ -56,4 +58,8 @@ int	gpio_controller_get_pin(uint32_t *);
 void	gpio_controller_set_pin(uint32_t *, int);
 uint32_t *gpio_controller_next_pin(uint32_t *);
 
+void	*gpio_controller_intr_establish(uint32_t *, int, struct cpu_info *,
+	    int (*)(void *), void *, char *);
+void	gpio_controller_intr_disestablish(void *);
+
 #endif /* _DEV_OFW_GPIO_H_ */