Re: [PATCH 6/6] arm64: defconfig: make Tegra238 and Tegra264 Pinctrl a loadable module

[Jon Hunter <jonathanh@nvidia.com>]

On 10/04/2026 07:37, Krzysztof Kozlowski wrote:
> On 09/04/2026 15:13, pshete@nvidia.com wrote:
>> From: Prathamesh Shete <pshete@nvidia.com>
>>
>> Building the Pinctrl driver into the kernel image increases its size.
> 
> That's obvious.
> 
>> These drivers are not required during early boot, build them as a loadable
>> module instead to reduce the kernel image size.
> 
> So you replace built-in into module?
>>
>> Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
>> ---
>>   arch/arm64/configs/defconfig | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>> index dd1ac01ee29b..f525670d3b84 100644
>> --- a/arch/arm64/configs/defconfig
>> +++ b/arch/arm64/configs/defconfig
>> @@ -711,6 +711,8 @@ CONFIG_PINCTRL_SC8280XP_LPASS_LPI=m
>>   CONFIG_PINCTRL_SM8550_LPASS_LPI=m
>>   CONFIG_PINCTRL_SM8650_LPASS_LPI=m
>>   CONFIG_PINCTRL_SOPHGO_SG2000=y
>> +CONFIG_PINCTRL_TEGRA238=m
>> +CONFIG_PINCTRL_TEGRA264=m
> 
> No, you just added as module. Why do we want them in upstream defconfig?
> 
> Standard question, already asked Nvidia more than once.

Yes :-)

Prathamesh, what we need to do is ...

1. Add a patch to populate the pinctrl DT nodes for Tegra264 device.
2. In this patch, only enable pinctrl for Tegra264 because we are
    lacking an upstream board for Tegra238 for that moment. In the commit
    message we should add a comment to indicate with Tegra264 platform is
    using this.

We can still merge the DT binding-doc changes and driver for Tegra238, 
but no point to enable in the defconfig yet.

Jon

-- 
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