linux-kernel - Re: [PATCH v2 3/3] arm64: dts: intel: add device tree for n6000

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Date:   Thu, 5 May 2022 08:42:42 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     matthew.gerlach@...ux.intel.com
Cc:     dinguyen@...nel.org, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH v2 3/3] arm64: dts: intel: add device tree for n6000

On 04/05/2022 23:22, matthew.gerlach@...ux.intel.com wrote:
> 
> 
> On Wed, 4 May 2022, Krzysztof Kozlowski wrote:
> 
>> On 03/05/2022 21:45, matthew.gerlach@...ux.intel.com wrote:
>>> From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
>>>
>>> Add a device tree for the n6000 instantiation of Agilex
>>> Hard Processor System (HPS).
>>>
>>> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
>>
>>> +
>>> +	soc {
>>> +		agilex_hps_bridges: bus@...00000 {
>>> +			compatible = "simple-bus";
>>> +			reg = <0x80000000 0x60000000>,
>>> +				<0xf9000000 0x00100000>;
>>> +			reg-names = "axi_h2f", "axi_h2f_lw";
>>> +			#address-cells = <0x2>;
>>> +			#size-cells = <0x1>;
>>> +			ranges = <0x00000000 0x00000000 0xf9000000 0x00001000>;
>>> +
>>> +			hps_cp_eng@0 {
>>
>> No underscores in node names.  dtc W=1 should complain about it.
> 
> I will remove the underscores in the name.  I didn't see a complaint when 
> I compiled it with "make W=1" in the kernel tree.
> 
>> The node name should be generic, matching class of a device. What is
>> this exactly?
> 
> The component is a specialized IP block instantiated in the FPGA directly 
> connected to the HPS.  In one sense the IP block is a simple DMA 
> controller, but it also has some registers for hand shaking between the 
> HPS and a host processor connected to the FPGA via PCIe.  Should I call 
> the node, dma@0?

Then maybe the closest is dma-controller.


Best regards,
Krzysztof