[PATCH] gpio: Add a reference to CEC on GPIO

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

This adds a pointer to the CEC GPIO driver from the GPIO list of
examples of drivers on top of GPIO.

Cc: Hans Verkuil <hverkuil@xxxxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 Documentation/driver-api/gpio/drivers-on-gpio.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/driver-api/gpio/drivers-on-gpio.rst b/Documentation/driver-api/gpio/drivers-on-gpio.rst
index 7da0c1dd1f7a..f3a189320e11 100644
--- a/Documentation/driver-api/gpio/drivers-on-gpio.rst
+++ b/Documentation/driver-api/gpio/drivers-on-gpio.rst
@@ -85,6 +85,10 @@ hardware descriptions such as device tree or ACPI:
   any other serio bus to the system and makes it possible to connect drivers
   for e.g. keyboards and other PS/2 protocol based devices.
 
+- cec-gpio: drivers/media/platform/cec-gpio/ is used to interact with a CEC
+  Consumer Electronics Control bus using only GPIO. It is used to communicate
+  with devices on the HDMI bus.
+
 Apart from this there are special GPIO drivers in subsystems like MMC/SD to
 read card detect and write protect GPIO lines, and in the TTY serial subsystem
 to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The
-- 
2.14.3

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