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authorLinus Walleij <linus.walleij@linaro.org>2018-04-14 12:43:18 +0300
committerLinus Walleij <linus.walleij@linaro.org>2018-05-16 15:35:24 +0300
commitdf42a02d45106ca55a90b27dadb2c44f4f9cef88 (patch)
treebdf003126e2593e547c1d17257dede5d6f24f9f6 /Documentation/driver-api
parent12f92ccc5baeb99e2f1d3ea9ae2e35441a56a100 (diff)
downloadlinux-df42a02d45106ca55a90b27dadb2c44f4f9cef88.tar.xz
gpio: Add a reference to CEC on GPIO
This adds a pointer to the CEC GPIO driver from the GPIO list of examples of drivers on top of GPIO. Cc: linux-media@vger.kernel.org Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r--Documentation/driver-api/gpio/drivers-on-gpio.rst4
1 files changed, 4 insertions, 0 deletions
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