Re: [PATCH] devicetree: Add video bus switch
From: Rob Herring <robh@kernel.org>
Date: 2017-02-08 22:10:30
Also in:
linux-media, lkml
On Fri, Feb 03, 2017 at 01:35:08PM +0100, Pavel Machek wrote:
quoted hunk ↗ jump to hunk
N900 contains front and back camera, with a switch between the two. This adds support for the switch component, and it is now possible to select between front and back cameras during runtime. This adds documentation for the devicetree binding. Signed-off-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Ivaylo Dimitrov <redacted> Signed-off-by: Pavel Machek <redacted>diff --git a/Documentation/devicetree/bindings/media/video-bus-switch.txt b/Documentation/devicetree/bindings/media/video-bus-switch.txt new file mode 100644 index 0000000..1b9f8e0 --- /dev/null +++ b/Documentation/devicetree/bindings/media/video-bus-switch.txt@@ -0,0 +1,63 @@ +Video Bus Switch Binding +========================
I'd call it a mux rather than switch. BTW, there's a new mux-controller binding under review you might look at. It would only be needed here if the mux ctrl also controls other things.
+ +This is a binding for a gpio controlled switch for camera interfaces. Such a +device is used on some embedded devices to connect two cameras to the same +interface of a image signal processor. + +Required properties +=================== + +compatible : must contain "video-bus-switch"
video-bus-gpio-mux
+switch-gpios : GPIO specifier for the gpio, which can toggle the
mux-gpios to align with existing GPIO controlled muxes.
+ selected camera. The GPIO should be configured, so + that a disabled GPIO means, that the first port is + selected. + +Required Port nodes +=================== + +More documentation on these bindings is available in +video-interfaces.txt in the same directory. + +reg : The interface: + 0 - port for image signal processor + 1 - port for first camera sensor + 2 - port for second camera sensor
This could be used for display side as well. So describe these just as inputs and outputs. Rob