Provide dummy functions for LCD register()/unregister() if
CONFIG_LCD_CLASS_DEVICE is not set.
This allows us to use the LCD class as an optional.
Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
---
include/linux/lcd.h | 37 ++++++++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/include/linux/lcd.h b/include/linux/lcd.h
index 504f624..39c41c7 100644
--- a/include/linux/lcd.h
+++ b/include/linux/lcd.h
@@ -110,14 +110,37 @@ static inline void lcd_set_power(struct lcd_device *ld, int power)
mutex_unlock(&ld->update_lock);
}
-extern struct lcd_device *lcd_device_register(const char *name,
- struct device *parent, void *devdata, struct lcd_ops *ops);
-extern struct lcd_device *devm_lcd_device_register(struct device *dev,
- const char *name, struct device *parent,
+#if defined(CONFIG_LCD_CLASS_DEVICE) || defined(CONFIG_LCD_CLASS_DEVICE_MODULE)
+struct lcd_device *lcd_device_register(const char *name, struct device *parent,
void *devdata, struct lcd_ops *ops);
-extern void lcd_device_unregister(struct lcd_device *ld);
-extern void devm_lcd_device_unregister(struct device *dev,
- struct lcd_device *ld);
+struct lcd_device *devm_lcd_device_register(struct device *dev,
+ const char *name, struct device *parent, void *devdata,
+ struct lcd_ops *ops);
+void lcd_device_unregister(struct lcd_device *ld);
+void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld);
+#else
+static inline struct lcd_device *lcd_device_register(const char *name,
+ struct device *parent, void *devdata, struct lcd_ops *ops)
+{
+ return NULL;
+}
+
+static inline struct lcd_device *devm_lcd_device_register(struct device *dev,
+ const char *name, struct device *parent, void *devdata,
+ struct lcd_ops *ops)
+{
+ return NULL;
+}
+
+static inline void lcd_device_unregister(struct lcd_device *ld)
+{
+}
+
+static inline void devm_lcd_device_unregister(struct device *dev,
+ struct lcd_device *ld)
+{
+}
+#endif
#define to_lcd_device(obj) container_of(obj, struct lcd_device, dev)
--
1.8.3.2
--
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