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[RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size

Arseniy Krasnov posted 2 patches 2 years, 7 months ago
There is a newer version of this series
[RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Arseniy Krasnov 2 years, 7 months ago 
Meson NAND supports both 512B and 1024B ECC step size, so replace
'const' for only 1024B step size with enum for both sizes.

Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
---
 Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
index 3bec8af91bbb..81ca8828731a 100644
--- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
+++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
@@ -49,7 +49,8 @@ patternProperties:
         const: hw
 
       nand-ecc-step-size:
-        const: 1024
+        enum: [512, 1024]
+        default: 1024
 
       nand-ecc-strength:
         enum: [8, 16, 24, 30, 40, 50, 60]
@@ -93,6 +94,7 @@ examples:
       nand@0 {
         reg = <0>;
         nand-rb = <0>;
+        nand-ecc-step-size = <1024>;
       };
     };
 
-- 
2.35.0
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Miquel Raynal 2 years, 7 months ago 
Hi Arseniy,

AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300:

> Meson NAND supports both 512B and 1024B ECC step size, so replace
> 'const' for only 1024B step size with enum for both sizes.
> 
> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> ---
>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> index 3bec8af91bbb..81ca8828731a 100644
> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> @@ -49,7 +49,8 @@ patternProperties:
>          const: hw
>  
>        nand-ecc-step-size:
> -        const: 1024
> +        enum: [512, 1024]
> +        default: 1024

I was actually wrong in my previous review, there is no strong default
here as the existing binding (and code) try to use the closest
parameters required by the NAND chip: we pick the "optimal"
configuration. So if you don't provide any value here, we expect
the strength and step size advertized by the chip to be used. This is a
common default in the raw NAND subsystem.

Please drop the default line, re-integrate the missing R-by tag from
Rob and in a separate patch please mark nand-ecc-step-size and
nand-ecc-strength mandatory if the other is provide. IOW, we expect
either both, or none of them, but not a single one.

>  
>        nand-ecc-strength:
>          enum: [8, 16, 24, 30, 40, 50, 60]
> @@ -93,6 +94,7 @@ examples:
>        nand@0 {
>          reg = <0>;
>          nand-rb = <0>;
> +        nand-ecc-step-size = <1024>;

So in the end this line is wrong and once you get the description right
as I mentioned it above, this will fail to pass
`make DT_SCHEMA_FILES=Documentation/devicetree/bindings/mtd/ dt_binidng_check`
Please drop it from the example, don't add the second property here,
it's best to show a clean example where people stop tampering for no
reason with the optimal values.

>        };
>      };
>  


Thanks,
Miquèl
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Arseniy Krasnov 2 years, 7 months ago 

On 05.07.2023 10:37, Miquel Raynal wrote:
> Hi Arseniy,
> 
> AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300:
> 
>> Meson NAND supports both 512B and 1024B ECC step size, so replace
>> 'const' for only 1024B step size with enum for both sizes.
>>
>> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>> ---
>>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>> index 3bec8af91bbb..81ca8828731a 100644
>> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>> @@ -49,7 +49,8 @@ patternProperties:
>>          const: hw
>>  
>>        nand-ecc-step-size:
>> -        const: 1024
>> +        enum: [512, 1024]
>> +        default: 1024
> 
> I was actually wrong in my previous review, there is no strong default
> here as the existing binding (and code) try to use the closest
> parameters required by the NAND chip: we pick the "optimal"
> configuration. So if you don't provide any value here, we expect
> the strength and step size advertized by the chip to be used. This is a
> common default in the raw NAND subsystem.
> 
> Please drop the default line, re-integrate the missing R-by tag from
> Rob and in a separate patch please mark nand-ecc-step-size and
> nand-ecc-strength mandatory if the other is provide. IOW, we expect
> either both, or none of them, but not a single one.

I see, no problem! "mandatory" means update description of both fields like:

    description:                                                        
      Mandatory if nand-ecc-step-size is set.

etc.

?

> 
>>  
>>        nand-ecc-strength:
>>          enum: [8, 16, 24, 30, 40, 50, 60]
>> @@ -93,6 +94,7 @@ examples:
>>        nand@0 {
>>          reg = <0>;
>>          nand-rb = <0>;
>> +        nand-ecc-step-size = <1024>;
> 
> So in the end this line is wrong and once you get the description right
> as I mentioned it above, this will fail to pass
> `make DT_SCHEMA_FILES=Documentation/devicetree/bindings/mtd/ dt_binidng_check`
> Please drop it from the example, don't add the second property here,
> it's best to show a clean example where people stop tampering for no
> reason with the optimal values.

Ok!

Thanks, Arseniy

> 
>>        };
>>      };
>>  
> 
> 
> Thanks,
> Miquèl
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Miquel Raynal 2 years, 7 months ago 
Hi Arseniy,

avkrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 11:03:30 +0300:

> On 05.07.2023 10:37, Miquel Raynal wrote:
> > Hi Arseniy,
> > 
> > AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300:
> >   
> >> Meson NAND supports both 512B and 1024B ECC step size, so replace
> >> 'const' for only 1024B step size with enum for both sizes.
> >>
> >> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> >> ---
> >>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
> >>  1 file changed, 3 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >> index 3bec8af91bbb..81ca8828731a 100644
> >> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >> @@ -49,7 +49,8 @@ patternProperties:
> >>          const: hw
> >>  
> >>        nand-ecc-step-size:
> >> -        const: 1024
> >> +        enum: [512, 1024]
> >> +        default: 1024  
> > 
> > I was actually wrong in my previous review, there is no strong default
> > here as the existing binding (and code) try to use the closest
> > parameters required by the NAND chip: we pick the "optimal"
> > configuration. So if you don't provide any value here, we expect
> > the strength and step size advertized by the chip to be used. This is a
> > common default in the raw NAND subsystem.
> > 
> > Please drop the default line, re-integrate the missing R-by tag from
> > Rob and in a separate patch please mark nand-ecc-step-size and
> > nand-ecc-strength mandatory if the other is provide. IOW, we expect
> > either both, or none of them, but not a single one.  
> 
> I see, no problem! "mandatory" means update description of both fields like:
> 
>     description:                                                        
>       Mandatory if nand-ecc-step-size is set.

Nope :-)

Something along:

allOf:
  - if:
    <nand-chip>:
      properties:
        contains:
          - nand-ecc-step-size
    then:
      required:
        <nand-chip>:
          properties:
            - nand-ecc-strength

And same with the opposite logic.

> 
> etc.
> 
> ?
> 
> >   
> >>  
> >>        nand-ecc-strength:
> >>          enum: [8, 16, 24, 30, 40, 50, 60]
> >> @@ -93,6 +94,7 @@ examples:
> >>        nand@0 {
> >>          reg = <0>;
> >>          nand-rb = <0>;
> >> +        nand-ecc-step-size = <1024>;  
> > 
> > So in the end this line is wrong and once you get the description right
> > as I mentioned it above, this will fail to pass
> > `make DT_SCHEMA_FILES=Documentation/devicetree/bindings/mtd/ dt_binidng_check`
> > Please drop it from the example, don't add the second property here,
> > it's best to show a clean example where people stop tampering for no
> > reason with the optimal values.  
> 
> Ok!
> 
> Thanks, Arseniy
> 
> >   
> >>        };
> >>      };
> >>    
> > 
> > 
> > Thanks,
> > Miquèl  


Thanks,
Miquèl
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Arseniy Krasnov 2 years, 7 months ago 

On 05.07.2023 11:22, Miquel Raynal wrote:
> Hi Arseniy,
> 
> avkrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 11:03:30 +0300:
> 
>> On 05.07.2023 10:37, Miquel Raynal wrote:
>>> Hi Arseniy,
>>>
>>> AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300:
>>>   
>>>> Meson NAND supports both 512B and 1024B ECC step size, so replace
>>>> 'const' for only 1024B step size with enum for both sizes.
>>>>
>>>> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>>>> ---
>>>>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
>>>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>>>> index 3bec8af91bbb..81ca8828731a 100644
>>>> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>>>> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
>>>> @@ -49,7 +49,8 @@ patternProperties:
>>>>          const: hw
>>>>  
>>>>        nand-ecc-step-size:
>>>> -        const: 1024
>>>> +        enum: [512, 1024]
>>>> +        default: 1024  
>>>
>>> I was actually wrong in my previous review, there is no strong default
>>> here as the existing binding (and code) try to use the closest
>>> parameters required by the NAND chip: we pick the "optimal"
>>> configuration. So if you don't provide any value here, we expect
>>> the strength and step size advertized by the chip to be used. This is a
>>> common default in the raw NAND subsystem.
>>>
>>> Please drop the default line, re-integrate the missing R-by tag from
>>> Rob and in a separate patch please mark nand-ecc-step-size and
>>> nand-ecc-strength mandatory if the other is provide. IOW, we expect
>>> either both, or none of them, but not a single one.  
>>
>> I see, no problem! "mandatory" means update description of both fields like:
>>
>>     description:                                                        
>>       Mandatory if nand-ecc-step-size is set.
> 
> Nope :-)
> 
> Something along:
> 
> allOf:
>   - if:
>     <nand-chip>:
>       properties:
>         contains:
>           - nand-ecc-step-size
>     then:
>       required:
>         <nand-chip>:
>           properties:
>             - nand-ecc-strength
> 
> And same with the opposite logic.

I see, thanks! And this should be for all nand chips, not only Amlogic? I mean in
nand-chip.yaml? 

I'll include it as third patch in this patchset.

Thanks, Arseniy

> 
>>
>> etc.
>>
>> ?
>>
>>>   
>>>>  
>>>>        nand-ecc-strength:
>>>>          enum: [8, 16, 24, 30, 40, 50, 60]
>>>> @@ -93,6 +94,7 @@ examples:
>>>>        nand@0 {
>>>>          reg = <0>;
>>>>          nand-rb = <0>;
>>>> +        nand-ecc-step-size = <1024>;  
>>>
>>> So in the end this line is wrong and once you get the description right
>>> as I mentioned it above, this will fail to pass
>>> `make DT_SCHEMA_FILES=Documentation/devicetree/bindings/mtd/ dt_binidng_check`
>>> Please drop it from the example, don't add the second property here,
>>> it's best to show a clean example where people stop tampering for no
>>> reason with the optimal values.  
>>
>> Ok!
>>
>> Thanks, Arseniy
>>
>>>   
>>>>        };
>>>>      };
>>>>    
>>>
>>>
>>> Thanks,
>>> Miquèl  
> 
> 
> Thanks,
> Miquèl
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Miquel Raynal 2 years, 7 months ago 
Hi Arseniy,

avkrasnov@sberdevices.ru wrote on Thu, 6 Jul 2023 08:57:00 +0300:

> On 05.07.2023 11:22, Miquel Raynal wrote:
> > Hi Arseniy,
> > 
> > avkrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 11:03:30 +0300:
> >   
> >> On 05.07.2023 10:37, Miquel Raynal wrote:  
> >>> Hi Arseniy,
> >>>
> >>> AVKrasnov@sberdevices.ru wrote on Wed, 5 Jul 2023 09:54:33 +0300:
> >>>     
> >>>> Meson NAND supports both 512B and 1024B ECC step size, so replace
> >>>> 'const' for only 1024B step size with enum for both sizes.
> >>>>
> >>>> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> >>>> ---
> >>>>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
> >>>>  1 file changed, 3 insertions(+), 1 deletion(-)
> >>>>
> >>>> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >>>> index 3bec8af91bbb..81ca8828731a 100644
> >>>> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >>>> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> >>>> @@ -49,7 +49,8 @@ patternProperties:
> >>>>          const: hw
> >>>>  
> >>>>        nand-ecc-step-size:
> >>>> -        const: 1024
> >>>> +        enum: [512, 1024]
> >>>> +        default: 1024    
> >>>
> >>> I was actually wrong in my previous review, there is no strong default
> >>> here as the existing binding (and code) try to use the closest
> >>> parameters required by the NAND chip: we pick the "optimal"
> >>> configuration. So if you don't provide any value here, we expect
> >>> the strength and step size advertized by the chip to be used. This is a
> >>> common default in the raw NAND subsystem.
> >>>
> >>> Please drop the default line, re-integrate the missing R-by tag from
> >>> Rob and in a separate patch please mark nand-ecc-step-size and
> >>> nand-ecc-strength mandatory if the other is provide. IOW, we expect
> >>> either both, or none of them, but not a single one.    
> >>
> >> I see, no problem! "mandatory" means update description of both fields like:
> >>
> >>     description:                                                        
> >>       Mandatory if nand-ecc-step-size is set.  
> > 
> > Nope :-)
> > 
> > Something along:
> > 
> > allOf:
> >   - if:
> >     <nand-chip>:
> >       properties:
> >         contains:
> >           - nand-ecc-step-size
> >     then:
> >       required:
> >         <nand-chip>:
> >           properties:
> >             - nand-ecc-strength
> > 
> > And same with the opposite logic.  
> 
> I see, thanks! And this should be for all nand chips, not only Amlogic? I mean in
> nand-chip.yaml? 

Some drivers can directly manage the user requests in terms of either
step size *or* strength, so I would keep this into the Amlogic file for
now.

> I'll include it as third patch in this patchset.
> 
> Thanks, Arseniy

Thanks,
Miquèl
Re: [RFC PATCH v2 1/2] dt-bindings: nand: meson: support for 512B ECC step size
Posted by Rob Herring 2 years, 7 months ago 
On Wed, 05 Jul 2023 09:54:33 +0300, Arseniy Krasnov wrote:
> Meson NAND supports both 512B and 1024B ECC step size, so replace
> 'const' for only 1024B step size with enum for both sizes.
> 
> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> ---
>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 


Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.

If a tag was not added on purpose, please state why and what changed.

Missing tags:

Acked-by: Rob Herring <robh@kernel.org>

Patchew 2.1-devel-b67e4c2

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