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

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

[João Paulo Gonçalves]

From: João Paulo Gonçalves <joao.goncalves@toradex.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@toradex.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
 CONFIG_HIX5HD2_GMAC=y
 CONFIG_HNS_DSAF=y
 CONFIG_HNS_ENET=y
@@ -615,6 +617,7 @@ CONFIG_PINCTRL_IMX8DXL=y
 CONFIG_PINCTRL_IMX8ULP=y
 CONFIG_PINCTRL_IMX91=y
 CONFIG_PINCTRL_IMX93=y
+CONFIG_PINCTRL_IMX_SCMI=y
 CONFIG_PINCTRL_MSM=y
 CONFIG_PINCTRL_IPQ5018=y
 CONFIG_PINCTRL_IPQ5332=y
@@ -1349,6 +1352,7 @@ CONFIG_CLK_IMX8MQ=y
 CONFIG_CLK_IMX8QXP=y
 CONFIG_CLK_IMX8ULP=y
 CONFIG_CLK_IMX93=y
+CONFIG_CLK_IMX95_BLK_CTL=y
 CONFIG_TI_SCI_CLK=y
 CONFIG_COMMON_CLK_MT8192_AUDSYS=y
 CONFIG_COMMON_CLK_MT8192_CAMSYS=y

---
base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
change-id: 20251023-upstream-imx95-smarc-defconfig-8972db535918

Best regards,
-- 
João Paulo Gonçalves <joao.goncalves@toradex.com>

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

[Krzysztof Kozlowski]

On 23/10/2025 14:19, João Paulo Gonçalves wrote:
> From: João Paulo Gonçalves <joao.goncalves@toradex.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


These do not carry any IMX95 compatibles, so I have doubts you described
the issue correctly. You claim that SoC needs them, not the board.

> * CONFIG_PINCTRL_IMX_SCMI for the pinctrl driver> * CONFIG_CLK_IMX95_BLK_CTL for the shared hardware domain controller


BTW standard comment applies - explain which upstream boards have all these.

Best regards,
Krzysztof

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

[Alexander Stein]

Hi,

Am Donnerstag, 23. Oktober 2025, 14:19:15 CEST schrieb João Paulo Gonçalves:
> From: João Paulo Gonçalves <joao.goncalves@toradex.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@toradex.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.

Best regards
Alexander

>  CONFIG_HIX5HD2_GMAC=y
>  CONFIG_HNS_DSAF=y
>  CONFIG_HNS_ENET=y
> @@ -615,6 +617,7 @@ CONFIG_PINCTRL_IMX8DXL=y
>  CONFIG_PINCTRL_IMX8ULP=y
>  CONFIG_PINCTRL_IMX91=y
>  CONFIG_PINCTRL_IMX93=y
> +CONFIG_PINCTRL_IMX_SCMI=y
>  CONFIG_PINCTRL_MSM=y
>  CONFIG_PINCTRL_IPQ5018=y
>  CONFIG_PINCTRL_IPQ5332=y
> @@ -1349,6 +1352,7 @@ CONFIG_CLK_IMX8MQ=y
>  CONFIG_CLK_IMX8QXP=y
>  CONFIG_CLK_IMX8ULP=y
>  CONFIG_CLK_IMX93=y
> +CONFIG_CLK_IMX95_BLK_CTL=y
>  CONFIG_TI_SCI_CLK=y
>  CONFIG_COMMON_CLK_MT8192_AUDSYS=y
>  CONFIG_COMMON_CLK_MT8192_CAMSYS=y
> 
> ---
> base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
> change-id: 20251023-upstream-imx95-smarc-defconfig-8972db535918
> 
> Best regards,
> 


-- 
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
http://www.tq-group.com/

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

[Krzysztof Kozlowski]

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@toradex.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@toradex.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.

Best regards,
Krzysztof

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

[Marek Vasut]

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@toradex.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@toradex.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.

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

[Krzysztof Kozlowski]

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@toradex.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@toradex.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.


Every arm64 platform is supposed to use initramfs and we already use all
over the place. Actually, even on arm32, so that use case is not
something defconfig is supposed to support. Your own product config of
course can.

Best regards,
Krzysztof

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@toradex.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@toradex.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.
> 
> 
> 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.

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

[Krzysztof Kozlowski]

On 23/10/2025 17:53, Marek Vasut wrote:
> 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@toradex.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@toradex.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.
>>
>>
>> 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.

It always was a requirement, nothing new here.

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

No, you missed my earlier point - all decent platforms already use
initramfs since it is really not complicated.


Best regards,
Krzysztof

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

[João Paulo Gonçalves]

Hi Krzysztof, 

On Thu, Oct 23, 2025 at 02:22:40PM +0200, Krzysztof Kozlowski wrote:
> On 23/10/2025 14:19, João Paulo Gonçalves wrote:
> > From: João Paulo Gonçalves <joao.goncalves@toradex.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
> 
> 
> These do not carry any IMX95 compatibles, so I have doubts you described
> the issue correctly. You claim that SoC needs them, not the board.
> 
> > * CONFIG_PINCTRL_IMX_SCMI for the pinctrl driver> * CONFIG_CLK_IMX95_BLK_CTL for the shared hardware domain controller
> 
> 
> BTW standard comment applies - explain which upstream boards have all these.

There are already some boards that need these configs, for example, the
NXP i.MX95 19x19 EVK. For booting, the only one needed is
CONFIG_PINCTRL_IMX_SCMI for the scmi_iomuxc pinctrl driver. Regarding
the other configs, they enable Ethernet and PCIe for now. All configs
are on imx95.dtsi.

I will prepare a v2 rephrasing the commit message.

Best Regards,
João Paulo Gonçalves

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

[Marek Vasut]

On 10/23/25 6:01 PM, Krzysztof Kozlowski wrote:
> On 23/10/2025 17:53, Marek Vasut wrote:
>> 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@toradex.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@toradex.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.
>>>
>>>
>>> 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.
> 
> It always was a requirement, nothing new here.

Is this requirement documented anywhere then ?

>> I would argue the ethernet MAC support should be built-in to achieve
>> maximum utility with the defconfig.
> 
> No, you missed my earlier point - all decent platforms already use
> initramfs since it is really not complicated.

Is my understanding correct, that the in-kernel defconfig is not meant 
for practical use and is meant mainly for build-testing/build-coverage ?

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

[Krzysztof Kozlowski]

On 23/10/2025 22:05, Marek Vasut wrote:
> On 10/23/25 6:01 PM, Krzysztof Kozlowski wrote:
>> On 23/10/2025 17:53, Marek Vasut wrote:
>>> 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@toradex.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@toradex.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.
>>>>
>>>>
>>>> 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.
>>
>> It always was a requirement, nothing new here.
> 
> Is this requirement documented anywhere then ?


Dunno, just dozen of emails.

> 
>>> I would argue the ethernet MAC support should be built-in to achieve
>>> maximum utility with the defconfig.
>>
>> No, you missed my earlier point - all decent platforms already use
>> initramfs since it is really not complicated.
> 
> Is my understanding correct, that the in-kernel defconfig is not meant 
> for practical use and is meant mainly for build-testing/build-coverage ?


It is 100% practical use - we all test our boards on defconfig. It is
not build testing, but actual runtime usage and testing. And as
mentioned many times - being able to only toggle KASAN for defconfig and
still fit in boot partition size is pretty useful.


Best regards,
Krzysztof