Documentation: i2c: slave-interface: add note for driver development

[cascardo/linux.git] / Documentation / i2c / slave-interface

diff --git a/Documentation/i2c/slave-interface b/Documentation/i2c/slave-interface
index 80807ad..7e2a228 100644 (file)
--- a/Documentation/i2c/slave-interface
+++ b/Documentation/i2c/slave-interface
@@ -145,6 +145,11 @@ If you want to add slave support to the bus driver:
 
 * Catch the slave interrupts and send appropriate i2c_slave_events to the backend.
 
+Note that most hardware supports being master _and_ slave on the same bus. So,
+if you extend a bus driver, please make sure that the driver supports that as
+well. In almost all cases, slave support does not need to disable the master
+functionality.
+
 Check the i2c-rcar driver as an example.