openwrtv4/target/linux/lantiq/patches-3.14/0034-reset-Fix-compile-when-reset-RESET_CONTROLLER-is-not.patch

From b1b9fca8c317afc3f2b78bb54f877e8a830a819d Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 9 Aug 2013 18:47:27 +0200
Subject: [PATCH 34/36] reset: Fix compile when reset RESET_CONTROLLER is not
 selected

Drivers need to protect their reset api calls with #ifdef to avoid compile
errors.

This patch adds dummy wrappers in the same way that linux/of.h does it.

Cc: linux-kernel@vger.kernel.org
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Gabor Juhos <juhosg@openwrt.org>
---
 include/linux/reset-controller.h |   16 ++++++++++++++
 include/linux/reset.h            |   43 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)

--- a/include/linux/reset-controller.h
+++ b/include/linux/reset-controller.h
@@ -46,7 +46,23 @@ struct reset_controller_dev {
 	unsigned int nr_resets;
 };
 
+#if defined(CONFIG_RESET_CONTROLLER)
+
 int reset_controller_register(struct reset_controller_dev *rcdev);
 void reset_controller_unregister(struct reset_controller_dev *rcdev);
 
+#else
+
+static inline int reset_controller_register(struct reset_controller_dev *rcdev)
+{
+	return -ENOSYS;
+}
+
+void reset_controller_unregister(struct reset_controller_dev *rcdev)
+{
+
+}
+
+#endif
+
 #endif
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -1,9 +1,13 @@
 #ifndef _LINUX_RESET_H_
 #define _LINUX_RESET_H_
 
+#include <linux/err.h>
+
 struct device;
 struct reset_control;
 
+#if defined(CONFIG_RESET_CONTROLLER)
+
 int reset_control_reset(struct reset_control *rstc);
 int reset_control_assert(struct reset_control *rstc);
 int reset_control_deassert(struct reset_control *rstc);
@@ -14,4 +18,43 @@ struct reset_control *devm_reset_control
 
 int device_reset(struct device *dev);
 
+#else /* CONFIG_RESET_CONTROLLER */
+
+static inline int reset_control_reset(struct reset_control *rstc)
+{
+	return -ENOSYS;
+}
+
+static inline int reset_control_assert(struct reset_control *rstc)
+{
+	return -ENOSYS;
+}
+
+static inline int reset_control_deassert(struct reset_control *rstc)
+{
+	return -ENOSYS;
+}
+
+static inline struct reset_control *reset_control_get(struct device *dev, const char *id)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline void reset_control_put(struct reset_control *rstc)
+{
+
+}
+
+static inline struct reset_control *devm_reset_control_get(struct device *dev, const char *id)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline int device_reset(struct device *dev)
+{
+	return -ENOSYS;
+}
+
+#endif
+
 #endif