linux-kernel - Re: [PATCH v2 1/6] dt-bindings: reset: Add PDC Global binding for SDM845 SoCs

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Message-ID: <c675b609fcd0d243e4db2e6637c70902@codeaurora.org>
Date:   Tue, 28 Aug 2018 11:38:26 +0530
From:   sibis@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     bjorn.andersson@...aro.org, p.zabel@...gutronix.de,
        robh+dt@...nel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        ohad@...ery.com, mark.rutland@....com, sricharan@...eaurora.org,
        akdwived@...eaurora.org, linux-arm-msm@...r.kernel.org,
        tsoni@...eaurora.org
Subject: Re: [PATCH v2 1/6] dt-bindings: reset: Add PDC Global binding for
 SDM845 SoCs

Hi Matthias,
Thanks for the review

On 2018-08-28 06:08, Matthias Kaehlcke wrote:
> Hi Sibi,
> 
> On Fri, Aug 24, 2018 at 06:48:55PM +0530, Sibi Sankar wrote:
>> Add PDC Global(Power Domain Controller) binding for SDM845 SoCs.
> 
> nit: missing blank before the opening parenthesis.
> 

Will fix it

>> 
>> Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
>> ---
>>  .../bindings/reset/qcom,pdc-global.txt        | 52 
>> +++++++++++++++++++
>>  include/dt-bindings/reset/qcom,sdm845-pdc.h   | 20 +++++++
>>  2 files changed, 72 insertions(+)
>>  create mode 100644 
>> Documentation/devicetree/bindings/reset/qcom,pdc-global.txt
>>  create mode 100644 include/dt-bindings/reset/qcom,sdm845-pdc.h
>> 
>> diff --git 
>> a/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt 
>> b/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt
>> new file mode 100644
>> index 000000000000..69f9edca9503
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt
>> @@ -0,0 +1,52 @@
>> +PDC Global
>> +======================================
>> +
>> +This binding describes a reset-controller found on PDC-Global(Power 
>> Domain
>> +Controller) block for Qualcomm Technologies Inc SDM845 SoCs.
> 
> Are there other PDC reset controllers that aren't 'global'? Otherwise
> I'd suggest to use 'pdc-reset' instead of 'pdc-global', which is more
> specific and in line with the name of the driver added by this series.
> Or something like 'pdc-reset-global/main' if there are other
> controllers?
> 

These are the only reset lines found in the pdc-global register space. 
But as
explained by Bjorn, wouldn't it be better to leave it as such since 
pdc-global
best describes the hardware without being limited by the current 
functionality
it is being used for?

>> +Required properties:
>> +- compatible:
>> +	Usage: required
>> +	Value type: <string>
>> +	Definition: must be:
>> +		    "qcom,sdm845-pdc-global"
>> +
>> +- reg:
>> +	Usage: required
>> +	Value type: <prop-encoded-array>
>> +	Definition: must specify the base address and size of the register
>> +	            space.
>> +
>> +- #reset-cells:
>> +	Usage: required
>> +	Value type: <uint>
>> +	Definition: must be 1; cell entry represents the reset index.
>> +
>> +Example:
>> +
>> +pdc_reset: reset-controller@...0000 {
>> +	compatible = "qcom,sdm845-pdc-global";
>> +	reg = <0xb2e0000 0x20000>;
>> +	#reset-cells = <1>;
>> +};
>> +
>> +PDC reset clients
>> +======================================
>> +
>> +Device nodes that need access to reset lines should
>> +specify them as a reset phandle in their corresponding node as
>> +specified in reset.txt.
>> +
>> +For list of all valid reset indicies see
> 
> s/indicies/indices/ (or s/indicies/lines/ ?)
> 
> Cheers
> 
> Matthias