Add interface to facilitate iterating over gpios.

ok patrick@

diff --git a/sys/dev/ofw/ofw_gpio.c b/sys/dev/ofw/ofw_gpio.c
index 668210a..5f814ac 100644 (file)
--- 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 52f00b0..52b2fe0 100644 (file)
--- 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_ */