reset: Add of_reset_control_get

In some cases, you might need to deassert from reset an hardware block that
doesn't associated to a struct device (CPUs, timers, etc.).

Add a small helper to retrieve the reset controller from the device tree
without the need to pass a struct device.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/reset.h b/include/linux/reset.h
index 6082247feab1..a398025d1138 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_RESET_H_
 #define _LINUX_RESET_H_
 
+#include <linux/of.h>
+
 struct device;
 struct reset_control;
 
@@ -8,6 +10,8 @@ int reset_control_reset(struct reset_control *rstc);
 int reset_control_assert(struct reset_control *rstc);
 int reset_control_deassert(struct reset_control *rstc);
 
+struct reset_control *of_reset_control_get(struct device_node *node,
+					   const char *id);
 struct reset_control *reset_control_get(struct device *dev, const char *id);
 void reset_control_put(struct reset_control *rstc);
 struct reset_control *devm_reset_control_get(struct device *dev, const char *id);