Re: [PATCH v3 1/5] dt-bindings: media: adv7604: Add support for i2c_new_secondary_device

Kieran Bingham
2018-02-13T13:14:51Z

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@vodalys.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@vodalys.com>
>> [Kieran: Re-adapted for mainline]
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> Reviewed-by: Rob Herring <robh@kernel.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@ideasonboard.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>;
>
>