linux-kernel - Re: [PATCHv2 2/3] devicetree: Add new ANX7814 SlimPort transmitter binding.

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Date:	Thu, 10 Sep 2015 16:11:03 +0200
From:	Enric Balletbo Serra <eballetbo@...il.com>
To:	Rob Herring <robh@...nel.org>
Cc:	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	devel@...verdev.osuosl.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, airlied@...ux.ie,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Javier Martinez Canillas <javier@...hile0.org>,
	span@...logixsemi.com, Nathan Chung <nathan.chung@...iatek.com>
Subject: Re: [PATCHv2 2/3] devicetree: Add new ANX7814 SlimPort transmitter binding.

Hi Rob,

2015-09-09 2:40 GMT+02:00 Rob Herring <robh@...nel.org>:
> On 09/08/2015 02:25 AM, Enric Balletbo i Serra wrote:
>> The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
>> designed for portable devices.
>>
>> You can add support to your board with current binding.
>>
>> Example:
>>
>>       anx7814: anx7814@38 {
>>               compatible = "analogix,anx7814";
>>               reg = <0x38>;
>>               pd-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
>>               reset-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
>>       };
>>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> ---
>>  .../devicetree/bindings/video/anx7814.txt          | 22 ++++++++++++++++++++++
>>  1 file changed, 22 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/video/anx7814.txt
>>
>> diff --git a/Documentation/devicetree/bindings/video/anx7814.txt b/Documentation/devicetree/bindings/video/anx7814.txt
>> new file mode 100644
>> index 0000000..a8cc746
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/video/anx7814.txt
>> @@ -0,0 +1,22 @@
>> +Analogix ANX7814 SlimPort (Full-HD Transmitter)
>> +-----------------------------------------------
>> +
>> +The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
>> +designed for portable devices.
>> +
>> +Required properties:
>> +
>> + - compatible        : "analogix,anx7814"
>> + - reg               : I2C address of the device
>> + - pd-gpios  : Which GPIO to use for power down
>> + - reset-gpios       : Which GPIO to use for reset
>> +
>> +Example:
>> +
>> +     anx7814: anx7814@38 {
>> +             compatible = "analogix,anx7814";
>> +             reg = <0x38>;
>> +             pd-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
>> +             reset-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
>
> No ports needed for describing data connections?
>

IMHO I'm not sure if this is applicable here, in this case the bridge
is transparent so it's not required another device node. For example,
I've an evaluation board, whre I connect in one side an HDMI input
signal an in the other side a DP monitor, the driver only configures
the chip and waits for different events (cable plug, cable unplug, etc
..)

Cheers,
Enric

> Rob
>
>> +     };
>> +
>>
>
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