linux-kernel - Re: [PATCH] dt-bindings: mfd: syscon: Add ti,am62p-cpsw-mac-efuse compatible

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Date: Wed, 3 Apr 2024 08:27:06 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Siddharth Vadapalli <s-vadapalli@...com>
Cc: lee@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, srk@...com
Subject: Re: [PATCH] dt-bindings: mfd: syscon: Add ti,am62p-cpsw-mac-efuse
 compatible

On 03/04/2024 07:35, Siddharth Vadapalli wrote:
> On Tue, Apr 02, 2024 at 08:06:27PM +0200, Krzysztof Kozlowski wrote:
>> On 02/04/2024 14:30, Siddharth Vadapalli wrote:
>>> On Tue, Apr 02, 2024 at 02:08:32PM +0200, Krzysztof Kozlowski wrote:
>>>> On 02/04/2024 12:57, Siddharth Vadapalli wrote:
>>>>> The CTRLMMR_MAC_IDx registers within the CTRL_MMR space of TI's AM62p SoC
>>>>> contain the MAC Address programmed in the eFuse. Add compatible for
>>>>> allowing the CPSW driver to obtain a regmap for the CTRLMMR_MAC_IDx
>>>>> registers within the System Controller device-tree node. The default MAC
>>>>> Address for the interface corresponding to the first MAC port will be set
>>>>> to the value programmed in the eFuse.
>>>>>
>>>>> Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
>>>>> ---
>>>>>
>>>>> This patch is based on linux-next tagged next-20240402.
>>>>
>>>> Where is the DTS using it?
>>>
>>> The current implementation in the device-tree for older TI K3 SoCs is as
>>> follows:
>>>
>>> 	cpsw_port1: port@1 {
>>> 		reg = <1>;
>>> 		ti,mac-only;
>>> 		label = "port1";
>>> 		phys = <&phy_gmii_sel 1>;
>>> 		mac-address = [00 00 00 00 00 00];
>>> 		ti,syscon-efuse = <&wkup_conf 0x200>;
>>> 	};
>>>
>>> The "ti,syscon-efuse" property passes the reference to the System
>>> Controller node as well as the offset to the CTRLMMR_MAC_IDx registers
>>> within the CTRL_MMR space.
>>
>> Please reference upstream DTS or lore link to patch under review.
> 
> An example of the existing implementation in the device-tree for AM64x
> is:
> https://github.com/torvalds/linux/blob/d4e8c8ad5d14ad51ed8813442d81c43019fd669d/arch/arm64/boot/dts/ti/k3-am64-main.dtsi#L697
> It uses:
> 	ti,syscon-efuse = <&main_conf 0x200>;
> 
> and "main_conf" node is defined at:
> https://github.com/torvalds/linux/blob/d4e8c8ad5d14ad51ed8813442d81c43019fd669d/arch/arm64/boot/dts/ti/k3-am64-main.dtsi#L40

It is quite different than your bindings, so your bindings are incorrect.

Please fix them and send when your DTS is ready.


Best regards,
Krzysztof