ARM: rockchip: rk3228: add grf definition

[firefly-linux-kernel-4.4.55.git] / include / linux / i2c.h

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index e988fa935b3c4ad22e5a6e47e8f4ccea0f0e1c3d..21891898ced0a9f3d90013aa44a9a30ae01d6311 100644 (file)
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -542,6 +542,26 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
 
 #endif /* I2C */
 
+#if IS_ENABLED(CONFIG_OF)
+/* must call put_device() when done with returned i2c_client device */
+extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
+
+/* must call put_device() when done with returned i2c_adapter device */
+extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
+
+#else
+
+static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
+{
+       return NULL;
+}
+
+static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
+{
+       return NULL;
+}
+#endif /* CONFIG_OF */
+
 #if IS_ENABLED(CONFIG_ACPI_I2C)
 extern void acpi_i2c_register_devices(struct i2c_adapter *adap);
 #else