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authorPeter Chen <peter.chen@freescale.com>2013-10-22 16:46:25 +0800
committerLee Jones <lee.jones@linaro.org>2013-10-23 16:22:35 +0100
commitdf73de9b0d412915384396637bf67ef9208161e9 (patch)
tree249e2e7910ca68c4c7b0adcbdcbbcda835bedaca /include/linux/mfd/syscon.h
parentd460a6f3d67a8558fb58299518077888b7dbf5f3 (diff)
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mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON is not enabled
Some platforms may not define CONFIG_MFD_SYSCON (or haven't syscon), it can fix build error for these platforms. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include/linux/mfd/syscon.h')
-rw-r--r--include/linux/mfd/syscon.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
index b473577f36db..8789fa3c7fd9 100644
--- a/include/linux/mfd/syscon.h
+++ b/include/linux/mfd/syscon.h
@@ -17,10 +17,35 @@
struct device_node;
+#ifdef CONFIG_MFD_SYSCON
extern struct regmap *syscon_node_to_regmap(struct device_node *np);
extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
extern struct regmap *syscon_regmap_lookup_by_phandle(
struct device_node *np,
const char *property);
+#else
+static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct regmap *syscon_regmap_lookup_by_phandle(
+ struct device_node *np,
+ const char *property)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
+
#endif /* __LINUX_MFD_SYSCON_H__ */