linux-kernel - Re: [RFCv2 1/3] docs: dts: Added documentation for Xilinx Zynq Reset Controller bindings.

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Date:	Tue, 28 Jul 2015 10:25:08 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>,
	Moritz Fischer <moritz.fischer@...us.com>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<michal.simek@...inx.com>, <soren.brinkmann@...inx.com>,
	<linux@....linux.org.uk>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [RFCv2 1/3] docs: dts: Added documentation for Xilinx Zynq Reset
 Controller bindings.

On 07/28/2015 10:05 AM, Philipp Zabel wrote:
> Am Freitag, den 24.07.2015, 17:21 -0700 schrieb Moritz Fischer:
>> Signed-off-by: Moritz Fischer <moritz.fischer@...us.com>
>> ---
>>  Documentation/devicetree/bindings/reset/zynq-reset-pl.txt | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/reset/zynq-reset-pl.txt
>>
>> diff --git a/Documentation/devicetree/bindings/reset/zynq-reset-pl.txt b/Documentation/devicetree/bindings/reset/zynq-reset-pl.txt
>> new file mode 100644
>> index 0000000..ac4499e
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/reset/zynq-reset-pl.txt
>> @@ -0,0 +1,13 @@
>> +Xilinx Zynq PL Reset Manager
>> +
>> +Required properties:
>> +- compatible: "xlnx,zynq-reset-pl"
>> +- syscon <&slcr>;
>> +- #reset-cells: 1
>> +
>> +Example:
>> +	rstc: rstc@240 {
>> +		#reset-cells = <1>;
>> +		compatible = "xlnx,zynq-reset-pl";
>> +		syscon = <&slcr>;
> 
> Why the syscon phandle if rstc always is the child of slcr? Why not just
> request the syscon for the rstc's parent node.

We are using this description for pincntrl which was properly reviewed
that's why I expect Moritz just use the same style.
But yes also referencing parent should work.

TBH I don't have strong preference but having unified style is something
what I would prefer.

Also I see that using parent is used by others and it looks like that
having something like syscon_regmap_lookup_parent will be worth to have.

Thanks,
Michal


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