Re: [PATCH v5 2/5] dt-bindings: clock: Add AST2500/AST2600 HACE reset definition

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On 29/06/2022 09:59, Neal Liu wrote:
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>> Sent: Wednesday, June 29, 2022 1:58 PM
>> To: Neal Liu <neal_liu@xxxxxxxxxxxxxx>; Corentin Labbe
>> <clabbe.montjoie@xxxxxxxxx>; Christophe JAILLET
>> <christophe.jaillet@xxxxxxxxxx>; Randy Dunlap <rdunlap@xxxxxxxxxxxxx>;
>> Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>; David S . Miller
>> <davem@xxxxxxxxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; Krzysztof
>> Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>; Joel Stanley <joel@xxxxxxxxx>;
>> Andrew Jeffery <andrew@xxxxxxxx>; Dhananjay Phadke
>> <dhphadke@xxxxxxxxxxxxx>; Johnny Huang
>> <johnny_huang@xxxxxxxxxxxxxx>
>> Cc: linux-aspeed@xxxxxxxxxxxxxxxx; linux-crypto@xxxxxxxxxxxxxxx;
>> devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
>> linux-kernel@xxxxxxxxxxxxxxx; BMC-SW <BMC-SW@xxxxxxxxxxxxxx>
>> Subject: Re: [PATCH v5 2/5] dt-bindings: clock: Add AST2500/AST2600 HACE
>> reset definition
>>
>> On 29/06/2022 05:20, Neal Liu wrote:
>>> Add HACE reset bit definition for AST2500/AST2600.
>>>
>>> Signed-off-by: Neal Liu <neal_liu@xxxxxxxxxxxxxx>
>>> Signed-off-by: Johnny Huang <johnny_huang@xxxxxxxxxxxxxx>
>>> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>>> ---
>>>  include/dt-bindings/clock/aspeed-clock.h  | 3 ++-
>>> include/dt-bindings/clock/ast2600-clock.h | 1 +
>>>  2 files changed, 3 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/include/dt-bindings/clock/aspeed-clock.h
>>> b/include/dt-bindings/clock/aspeed-clock.h
>>> index 9ff4f6e4558c..6e040f7c3426 100644
>>> --- a/include/dt-bindings/clock/aspeed-clock.h
>>> +++ b/include/dt-bindings/clock/aspeed-clock.h
>>> @@ -46,11 +46,12 @@
>>>  #define ASPEED_RESET_MCTP		1
>>>  #define ASPEED_RESET_ADC		2
>>>  #define ASPEED_RESET_JTAG_MASTER	3
>>> -#define ASPEED_RESET_MIC		4
>>> +#define ASPEED_RESET_HACE		4
>>
>> I did not ack such change. This is a significant change from previous version,
>> invalidating my previous ack.
>>
>> This breaks the ABI, so NAK without proper explanation why ABI break is
>> accepted.
> 
> I changed the original define (MIC) into different value (see below diff), and add a new define for HACE.
> How does that break the ABI? I'll be appreciated if you can explain it more details.
> And sorry for not remove ack with new change.

Yes, this breaks ABI. Previously the ASPEED_RESET_MIC define had value
of 4, now it has value of something else.

Best regards,
Krzysztof



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