linux-kernel - Re: [PATCH v1] arm64: defconfig: Enable i.MX95 configs for booting and Ethernet

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Message-ID: <5d042f21-274e-4b69-849a-3342d77942eb@mailbox.org>
Date: Thu, 23 Oct 2025 17:27:55 +0200
From: Marek Vasut <marek.vasut@...lbox.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Alexander Stein <alexander.stein@...tq-group.com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Shawn Guo <shawnguo@...nel.org>, Fabio Estevam <festevam@...il.com>,
 Marek Vasut <marex@...x.de>, Peng Fan <peng.fan@....com>,
 linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
 João Paulo Gonçalves <joao.goncalves@...adex.com>,
 João Paulo Gonçalves <jpaulo.silvagoncalves@...il.com>
Subject: Re: [PATCH v1] arm64: defconfig: Enable i.MX95 configs for booting
 and Ethernet

On 10/23/25 5:22 PM, Krzysztof Kozlowski wrote:
> On 23/10/2025 16:03, Alexander Stein wrote:
>> Hi,
>>
>> Am Donnerstag, 23. Oktober 2025, 14:19:15 CEST schrieb João Paulo Gonçalves:
>>> From: João Paulo Gonçalves <joao.goncalves@...adex.com>
>>>
>>> Enable the necessary missing configs for the i.MX95 to boot and also
>>> have Ethernet working:
>>>
>>> * CONFIG_NXP_ENETC4 for the network controller driver
>>> * CONFIG_NXP_NETC_BLK_CTRL for the NETC hardware domain controller
>>> * CONFIG_PINCTRL_IMX_SCMI for the pinctrl driver
>>> * CONFIG_CLK_IMX95_BLK_CTL for the shared hardware domain controller
>>>
>>> Signed-off-by: João Paulo Gonçalves <joao.goncalves@...adex.com>
>>> ---
>>>   arch/arm64/configs/defconfig | 4 ++++
>>>   1 file changed, 4 insertions(+)
>>>
>>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>>> index e3a2d37bd10423b028f59dc40d6e8ee1c610d6b8..787d3ae3f5afeac486a905e0943e7b0e1dcee3a9 100644
>>> --- a/arch/arm64/configs/defconfig
>>> +++ b/arch/arm64/configs/defconfig
>>> @@ -354,8 +354,10 @@ CONFIG_FSL_FMAN=y
>>>   CONFIG_FSL_DPAA_ETH=y
>>>   CONFIG_FSL_DPAA2_ETH=y
>>>   CONFIG_FSL_ENETC=y
>>> +CONFIG_NXP_ENETC4=m
>>>   CONFIG_FSL_ENETC_VF=y
>>>   CONFIG_FSL_ENETC_QOS=y
>>> +CONFIG_NXP_NETC_BLK_CTRL=m
>>
>> Are you sure this should be module? Shouldn't NFS boot be supported by
>> default? I might be wring here though.
> 
> 
> NFS root is supported already with this being module. Yes, it must be a
> module, cannot be built in.
It seems I am using it as built-in on MX95 Verdin (patch is posted on 
the ML), and yes, I do boot from NFS root without any initrd/initramfs. 
It has to be built-in for that use case to work.