[Linux-stm32] [PATCH v3 2/3] dt-bindings: arm: stm32: allow TAMP nvram child node for syscon

[Krzysztof Kozlowski]

On 04/11/2026 14:43, Patrice CHOTARD wrote:
> 
> 
> On 10/17/26 19:52, Krzysztof Kozlowski wrote:
>> On Fri, Oct 16, 2026 at 05:26:04PM +0200, Patrice Chotard wrote:
>>> The STM32 TAMP node (compatible "st,stm32-tamp", "syscon", "simple-mfd")
>>> exposes its backup registers through an nvram child node described by
>>> nvmem/st,stm32-tamp-nvram.yaml. That requires the TAMP node to carry
>>> "#address-cells", "#size-cells", "ranges" and an "nvram at ..." child.
>>>
>>> st,stm32-syscon.yaml uses "additionalProperties: false" and only allowed
>>> reg/clocks/#clock-cells, so wiring the nvram provider into the DTSI made
>>> "make dtbs_check" fail on every STM32MP TAMP node:
>>>
>>>   tamp at 5c00a000 (st,stm32-tamp): '#address-cells', '#size-cells',
>>>   'nvram at 5c00a100', 'ranges' do not match any of the regexes:
>>>   '^pinctrl-[0-9]+$'
>>
>> There are no children of tamp at 5c00a000 in
>> arch/arm/boot/dts/st/stm32mp151.dtsi. How is it possible to reproduce
>> this warning?
>>
>> Are you using some other patches bugs as a reason of change in bindings?
> 
> Hi Krzysztof
> 
> yes, in this patch [1] arch/arm/boot/dts/st/stm32mp151.dtsi is updated
> that's why bindings need this change.

You cannot use future code as a bug being fixed.


Best regards,
Krzysztof