linux-kernel - Re: [PATCH v3 1/5] dt-bindings: media: adv7604: Add support for i2c_new_secondary

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Date:   Tue, 13 Feb 2018 13:14:43 +0000
From:   Kieran Bingham <kieran.bingham@...asonboard.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 1/5] dt-bindings: media: adv7604: Add support for
 i2c_new_secondary_device

Hi Laurent,

On 13/02/18 12:06, Laurent Pinchart wrote:
> Hi Kieran,
> 
> Thank you for the patch.

Thank you for your review,

> On Tuesday, 13 February 2018 00:07:49 EET Kieran Bingham wrote:
>> From: Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>
>>
>> The ADV7604 has thirteen 256-byte maps that can be accessed via the main
>> I²C ports. Each map has it own I²C address and acts as a standard slave
>> device on the I²C bus.
>>
>> Extend the device tree node bindings to be able to override the default
>> addresses so that address conflicts with other devices on the same bus
>> may be resolved at the board description level.
>>
>> Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>
>> [Kieran: Re-adapted for mainline]
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
>> Reviewed-by: Rob Herring <robh@...nel.org>
> 
> Nitpicking, I might not mention i2c_new_secondary_device in the subject, as 
> this is a DT bindings change. I don't mind too much though, as long as the 
> bindings themselves don't contain Linux-specific information, and they don't, 
> so
How about: ... adv7604: Extend bindings to allow specifying slave map addresses



> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Collected, thanks.

--
Kieran


> 
>> ---
>> Based upon the original posting :
>>   https://lkml.org/lkml/2014/10/22/469
>>
>> v2:
>>  - DT Binding update separated from code change
>>  - Minor reword to commit message to account for DT only change.
>>  - Collected Rob's RB tag.
>>
>> v3:
>>  - Split map register addresses into individual declarations.
>>
>>  .../devicetree/bindings/media/i2c/adv7604.txt          | 18
>> ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
>> b/Documentation/devicetree/bindings/media/i2c/adv7604.txt index
>> 9cbd92eb5d05..ebb5f070c05b 100644
>> --- a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
>> +++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
>> @@ -13,7 +13,11 @@ Required Properties:
>>      - "adi,adv7611" for the ADV7611
>>      - "adi,adv7612" for the ADV7612
>>
>> -  - reg: I2C slave address
>> +  - reg: I2C slave addresses
>> +    The ADV76xx has up to thirteen 256-byte maps that can be accessed via
>> the +    main I²C ports. Each map has it own I²C address and acts as a
>> standard +    slave device on the I²C bus. The main address is mandatory,
>> others are +    optional and revert to defaults if not specified.
>>
>>    - hpd-gpios: References to the GPIOs that control the HDMI hot-plug
>>      detection pins, one per HDMI input. The active flag indicates the GPIO
>> @@ -35,6 +39,11 @@ Optional Properties:
>>
>>    - reset-gpios: Reference to the GPIO connected to the device's reset pin.
>> - default-input: Select which input is selected after reset.
>> +  - reg-names : Names of maps with programmable addresses.
>> +		It can contain any map needing a non-default address.
>> +		Possible maps names are :
>> +		  "main", "avlink", "cec", "infoframe", "esdp", "dpp", "afe",
>> +		  "rep", "edid", "hdmi", "test", "cp", "vdp"
>>
>>  Optional Endpoint Properties:
>>
>> @@ -52,7 +61,12 @@ Example:
>>
>>  	hdmi_receiver@4c {
>>  		compatible = "adi,adv7611";
>> -		reg = <0x4c>;
>> +		/*
>> +		 * The edid page will be accessible @ 0x66 on the i2c bus. All
>> +		 * other maps will retain their default addresses.
>> +		 */
>> +		reg = <0x4c>, <0x66>;
>> +		reg-names "main", "edid";
>>
>>  		reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
>>  		hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;
> 
>