@@ -66,4 +66,23 @@ void of_register_i2c_devices(struct i2c_adapter *adap,
}
EXPORT_SYMBOL(of_register_i2c_devices);
+static int of_dev_node_match(struct device *dev, void *data)
+{
+ return dev_archdata_get_node(&dev->archdata) == data;
+}
+
+/* must call put_device() when done with returned i2c_client device */
+struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
+{
+ struct device *dev;
+
+ dev = bus_find_device(&i2c_bus_type, NULL, node,
+ of_dev_node_match);
+ if (!dev)
+ return NULL;
+
+ return to_i2c_client(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_device_by_node);
+
MODULE_LICENSE("GPL");
@@ -17,4 +17,7 @@
void of_register_i2c_devices(struct i2c_adapter *adap,
struct device_node *adap_node);
+/* must call put_device() when done with returned i2c_client device */
+struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
+
#endif /* __LINUX_OF_I2C_H */
Add the of_find_i2c_device_by_node function. This allows you to follow a reference in the device tree to an i2c device node and then locate the linux device instantiated by the device tree. Example use, an i2s codec controlled by i2c. Anton - this version is based off from your patches Signed-off-by: Jon Smirl <jonsmirl@gmail.com> --- drivers/of/of_i2c.c | 19 +++++++++++++++++++ include/linux/of_i2c.h | 3 +++ 2 files changed, 22 insertions(+), 0 deletions(-)