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

[Marek Vasut]

On 10/23/25 5:32 PM, Krzysztof Kozlowski wrote:
> On 23/10/2025 17:27, Marek Vasut wrote:
> > 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@xxxxxxxxxxx>
> > > > >
> > > > > 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@xxxxxxxxxxx>
> > > > > ---
> > > > >    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.
>
>
> Every arm64 platform is supposed to use initramfs and we already use all
> over the place.

Shouldn't the platform also be at least bootable with the defconfig ? If 
yes, then initramfs is a mandatory requirement for a NFS root boot (not 
a ... supposed to ... optional one), which does not seem to be the case 
until now.

I would argue the ethernet MAC support should be built-in to achieve 
maximum utility with the defconfig.