From 7b6fe30a0320e87a776312b7006f84c130a40a42 Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Wed, 27 Jul 2016 21:13:49 +0000
Subject: [PATCH] Add interface to facilitate iterating over gpios.

ok patrick@
---
 sys/dev/ofw/ofw_gpio.c | 15 ++++++++++++++-
 sys/dev/ofw/ofw_gpio.h |  3 ++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/sys/dev/ofw/ofw_gpio.c b/sys/dev/ofw/ofw_gpio.c
index 668210ae955..5f814ac7322 100644
--- a/sys/dev/ofw/ofw_gpio.c
+++ b/sys/dev/ofw/ofw_gpio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ofw_gpio.c,v 1.1 2016/07/11 14:49:41 kettenis Exp $	*/
+/*	$OpenBSD: ofw_gpio.c,v 1.2 2016/07/27 21:13:49 kettenis Exp $	*/
 /*
  * Copyright (c) 2016 Mark Kettenis
  *
@@ -82,3 +82,16 @@ gpio_controller_set_pin(uint32_t *cells, int val)
 	if (gc && gc->gc_set_pin)
 		gc->gc_set_pin(gc->gc_cookie, &cells[1], val);
 }
+
+uint32_t *
+gpio_controller_next_pin(uint32_t *cells)
+{
+	struct gpio_controller *gc;
+	uint32_t phandle = cells[0];
+
+	LIST_FOREACH(gc, &gpio_controllers, gc_list)
+		if (gc->gc_phandle == phandle)
+			return cells + gc->gc_cells + 1;
+
+	return NULL;
+}
diff --git a/sys/dev/ofw/ofw_gpio.h b/sys/dev/ofw/ofw_gpio.h
index 52f00b0f530..52b2fe08453 100644
--- a/sys/dev/ofw/ofw_gpio.h
+++ b/sys/dev/ofw/ofw_gpio.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ofw_gpio.h,v 1.1 2016/07/11 14:49:41 kettenis Exp $	*/
+/*	$OpenBSD: ofw_gpio.h,v 1.2 2016/07/27 21:13:49 kettenis Exp $	*/
 /*
  * Copyright (c) 2016 Mark Kettenis
  *
@@ -41,5 +41,6 @@ void	gpio_controller_config_pin(uint32_t *, int);
 
 int	gpio_controller_get_pin(uint32_t *);
 void	gpio_controller_set_pin(uint32_t *, int);
+uint32_t *gpio_controller_next_pin(uint32_t *);
 
 #endif /* _DEV_OFW_GPIO_H_ */
-- 
2.20.1