linux-kernel - Re: [PATCH linux-next v6 01/13] dt-bindings: Add a document of PECI subsystem

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Message-ID: <ba9f5c8a-17a7-f450-5f13-b1e9e5529f15@linux.intel.com>
Date:   Tue, 3 Jul 2018 09:58:11 -0700
From:   Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org,
        Andrew Jeffery <andrew@...id.au>, Joel Stanley <joel@....id.au>
Subject: Re: [PATCH linux-next v6 01/13] dt-bindings: Add a document of PECI
 subsystem

Hi Rob,

Thanks for the review. Please see my inline answer.

On 7/3/2018 9:47 AM, Rob Herring wrote:
> On Thu, Jun 21, 2018 at 12:39:47PM -0700, Jae Hyun Yoo wrote:
>> This commit adds a document of generic PECI bus, adapter and client
>> driver.
>>
>> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
>> Reviewed-by: Haiyue Wang <haiyue.wang@...ux.intel.com>
>> Reviewed-by: James Feist <james.feist@...ux.intel.com>
>> Reviewed-by: Vernon Mauery <vernon.mauery@...ux.intel.com>
>> Cc: Andrew Jeffery <andrew@...id.au>
>> Cc: Joel Stanley <joel@....id.au>
>> ---
>>   .../devicetree/bindings/peci/peci.txt         | 60 +++++++++++++++++++
>>   1 file changed, 60 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/peci/peci.txt
>>
>> diff --git a/Documentation/devicetree/bindings/peci/peci.txt b/Documentation/devicetree/bindings/peci/peci.txt
>> new file mode 100644
>> index 000000000000..5583aa80b78a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/peci/peci.txt
>> @@ -0,0 +1,60 @@
>> +Generic device tree configuration for PECI buses
>> +================================================
>> +
>> +Required properties:
>> +- compatible     : Should be "simple-bus".
>> +- #address-cells : Should be present if the device has sub-nodes.
>> +- #size-cells    : Should be present if the device has sub-nodes.
>> +- ranges         : Should contain PECI controller registers ranges.
>> +
>> +Example:
>> +	peci: peci@...00000 {
>> +		compatible = "simple-bus";
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges = <0x0 0x10000000 0x1000>;
>> +	};
> 
> I don't think you need this section. It's just the parent of the
> controller, right?
> 

Right. I'll drop this section out.

Thanks a lot,

Jae

>> +
>> +Generic device tree configuration for PECI adapters
>> +===================================================
>> +
>> +Required properties:
>> +- #address-cells : Should be <1>. Read more about client addresses below.
>> +- #size-cells    : Should be <0>. Read more about client addresses below.
>> +
>> +The cells properties above define that an address of CPU clients of a PECI bus
>> +are described by a single value.
>> +
>> +Example:
>> +	peci0: peci-bus@0 {
>> +		compatible = "vendor,soc-peci";
>> +		reg = <0x0 0x1000>;
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +	};
>> +
>> +Generic device tree configuration for PECI clients
>> +==================================================
>> +
>> +Required properties:
>> +- compatible : Should contain name of PECI client.
>> +- reg        : Should contain address of a client CPU. Address range of CPU
>> +	       clients starts from 0x30 based on PECI specification.
>> +
>> +Example:
>> +	peci-bus@0 {
>> +		compatible = "vendor,soc-peci";
>> +		reg = <0x0 0x1000>;
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +
>> +		peci-client@30 {
>> +			compatible = "vendor,peci-client";
>> +			reg = <0x30>;
>> +		};
>> +
>> +		peci-client@31 {
>> +			compatible = "vendor,peci-client";
>> +			reg = <0x31>;
>> +		};
>> +	};
>> -- 
>> 2.17.1
>>