linux-kernel - Re: [PATCH v2 2/4] arm64: dts: ti: k3-am654-base-board: add ICSSG2 Ethernet support

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Message-ID: <8db10b88-5b06-af84-cb0a-9fbaa29cf78c@ti.com>
Date:   Mon, 25 Sep 2023 13:51:52 +0530
From:   MD Danish Anwar <danishanwar@...com>
To:     Andrew Davis <afd@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Nishanth Menon <nm@...com>
CC:     Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Tero Kristo <kristo@...nel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        <r-gunasekaran@...com>
Subject: Re: [PATCH v2 2/4] arm64: dts: ti: k3-am654-base-board: add ICSSG2
 Ethernet support

Hi Andrew,

On 22/09/23 09:52, MD Danish Anwar wrote:
> On 21/09/23 22:57, Andrew Davis wrote:
>> On 9/21/23 1:09 AM, MD Danish Anwar wrote:
>>> ICSSG2 provides dual Gigabit Ethernet support.
>>>
>>> For support SR2.0 ICSSG Ethernet firmware:
>>> - provide different firmware blobs and use TX_PRU.
>>> - IEP0 is used as PTP Hardware Clock and can only be used for one port.
>>> - TX timestamp notification comes via INTC interrupt.
>>>
>>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>>> ---
>>>   arch/arm64/boot/dts/ti/Makefile               |   4 +-
>>>   ...se-board.dts => k3-am654-common-board.dts} |   0
>>>   arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso   | 145 ++++++++++++++++++
>>>   3 files changed, 148 insertions(+), 1 deletion(-)
>>>   rename arch/arm64/boot/dts/ti/{k3-am654-base-board.dts =>
>>> k3-am654-common-board.dts} (100%)
>>>   create mode 100644 arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/Makefile
>>> b/arch/arm64/boot/dts/ti/Makefile
>>> index e7b8e2e7f083..85c91f5e832e 100644
>>> --- a/arch/arm64/boot/dts/ti/Makefile
>>> +++ b/arch/arm64/boot/dts/ti/Makefile
>>> @@ -42,12 +42,14 @@ dtb-$(CONFIG_ARCH_K3) +=
>>> k3-am642-tqma64xxl-mbax4xxl-sdcard.dtb
>>>   dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl-wlan.dtb
>>>     # Boards with AM65x SoC
>>> -k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb
>>> k3-am654-base-board-rocktech-rk101-panel.dtbo
>>> +k3-am654-gp-evm-dtbs := k3-am654-common-board.dtb
>>> k3-am654-base-board-rocktech-rk101-panel.dtbo
>>
>> Should the k3-am654-gp-evm.dtb not also have this icssg2 support? Does
>> it work
>> to keep this line like before or is there some conflict having both
>> enabled?
>>
> 
> I have not tested this dtb (k3-am654-gp-evm.dtb). So just to be on the
> safe side I kept gp-evm.dtb as it was. Ideally gp-evm.dtb should have
> icssg2 support as well. But I haven't tested the combination of
> base-board + icssg dtbo + rockteck dtbo. That is why I kept gp-evm dtb
> as it was. Anyways, for ICSSG2's use case only k3-am654-base-board.dtb
> is used so I think it's ok to leave k3-am654-gp-evm.dtb to as it was.
> 
>> Andrew
>>

I tested AM654x-GP EVM with k3-am654-gp-evm.dtb with both the
combination below (having k3-am654-base-board-dtbs :=
k3-am654-common-board.dtb k3-am654-icssg2.dtbo), ICSSG worked fine in
both the scenarios and I didn't see any issue. I don't have a rocktech
panel with me so couldn't test that. But as far as ICSSG is concerned it
works fine with the both the combinations. Please let me know which one
should I use. Should I keep gp-evm as it is (use dtb without the icssg2
overlay) or should I add icssg2 overlay in gp-evm.dtb as well.


1. k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb
k3-am654-base-board-rocktech-rk101-panel.dtbo


2. k3-am654-gp-evm-dtbs := k3-am654-common-board.dtb
k3-am654-base-board-rocktech-rk101-panel.dtbo

-- 
Thanks and Regards,
Danish