linux-kernel - Re: [PATCH 1/2] slimbus: ngd: dt-bindings: Add slim ngd dt bindings

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Date:   Wed, 23 May 2018 18:17:23 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Rob Herring <robh@...nel.org>
Cc:     gregkh@...uxfoundation.org, kramasub@...eaurora.org,
        sdharia@...cinc.com, girishm@...cinc.com,
        linux-kernel@...r.kernel.org, mark.rutland@....com,
        bgoswami@...eaurora.org, devicetree@...r.kernel.org,
        broonie@...nel.org, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [PATCH 1/2] slimbus: ngd: dt-bindings: Add slim ngd dt bindings

Thanks Rob for review,

On 23/05/18 17:40, Rob Herring wrote:
> On Wed, May 16, 2018 at 05:51:17PM +0100, Srinivas Kandagatla wrote:
>> This patch adds bindings for Qualcomm SLIMBus NGD controller found in
>> all new SoCs starting from B family.
>> SLIMBus NGD controller is a light-weight driver responsible for
>> communicating with SLIMBus slaves directly over the bus using messaging
>> interface and communicating with master component residing on ADSP for
>> bandwidth and data-channel management
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> ---
>>   .../bindings/slimbus/slim-ngd-qcom-ctrl.txt        | 70 ++++++++++++++++++++++
>>   1 file changed, 70 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt
>>
>> diff --git a/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt b/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt
>> new file mode 100644
>> index 000000000000..c948fb098819
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/slimbus/slim-ngd-qcom-ctrl.txt
>> @@ -0,0 +1,70 @@
>> +Qualcomm SLIMBus Non Generic Device (NGD) Controller binding
>> +
>> +SLIMBus NGD controller is a light-weight driver responsible for communicating
>> +with SLIMBus slaves directly over the bus using messaging interface and
>> +communicating with master component residing on ADSP for bandwidth and
>> +data-channel management
>> +
>> +Please refer to slimbus/bus.txt for details of the common SLIMBus bindings.
>> +
>> +- compatible:
>> +	Usage: required
>> +	Value type: <stringlist>
>> +	Definition: must be "qcom,slim-ngd"
> 
> SoC specific compatible needed.

Yes, I will add that in v2.
> 
>> +
>> +- reg:
>> +	Usage: required
>> +	Value type: <prop-encoded-array>
>> +	Definition: must specify the base address and size of the controller
>> +		    register blocks.
> 
> blocks? Is there more than one? If so, how many?
Its just one. I will fix the text to reflect this.

> 
>> +
>> +- reg-names:
>> +	Usage: required
>> +	Value type: <stringlist>
>> +	Definition: must be "ctrl"
> 
> reg-names is pointless when there is only 1.
> 
>> +
>> +- qcom,ngd-id
>> +	Usage: required
>> +	Value type: <u32>
>> +	Definition: ngd instance id in the controller
> 
> Why do you need this?
I have removed this totally in my next version, which I will be posting 
soon.

Thanks,
srini