[PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Krzysztof Kozlowski]

Convert Marvell MVEBU SDRAM controller bindings to DT schema format
using json-schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
 .../mvebu-sdram-controller.txt                | 21 -------------
 2 files changed, 31 insertions(+), 21 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
 delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt

diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
new file mode 100644
index 000000000000..14a6bc8f421f
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell MVEBU SDRAM controller
+
+maintainers:
+  - Jan Luebbe <jlu@pengutronix.de>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+properties:
+  compatible:
+    const: marvell,armada-xp-sdram-controller
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    memory-controller@1400 {
+        compatible = "marvell,armada-xp-sdram-controller";
+        reg = <0x1400 0x500>;
+    };
diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
deleted file mode 100644
index 89657d1d4cd4..000000000000
--- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-Device Tree bindings for MVEBU SDRAM controllers
-
-The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
-differs from one SoC variant to another, but they also share a number
-of commonalities.
-
-For now, this Device Tree binding documentation only documents the
-Armada XP SDRAM controller.
-
-Required properties:
-
- - compatible: for Armada XP, "marvell,armada-xp-sdram-controller"
- - reg: a resource specifier for the register space, which should
-   include all SDRAM controller registers as per the datasheet.
-
-Example:
-
-sdramc@1400 {
-	compatible = "marvell,armada-xp-sdram-controller";
-	reg = <0x1400 0x500>;
-};
-- 
2.30.2

[PATCH 2/2] MAINTAINERS: EDAC/armada_xp: include dt-bindings

[Krzysztof Kozlowski]

Include dt-bindings for Marvell Armada XP SDRAM and L2 cache ECC in the
EDAC-ARMADA entry.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index be8e4af8ed64..ec75414db0ce 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6574,6 +6574,7 @@ EDAC-ARMADA
 M:	Jan Luebbe <jlu@pengutronix.de>
 L:	linux-edac@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
 F:	drivers/edac/armada_xp_*
 
 EDAC-AST2500
-- 
2.30.2

Re: [PATCH 2/2] MAINTAINERS: EDAC/armada_xp: include dt-bindings

[Jan Lübbe]

On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
> Include dt-bindings for Marvell Armada XP SDRAM and L2 cache ECC in the
> EDAC-ARMADA entry.

The L2 cache binding is already described in
Documentation/devicetree/bindings/arm/l2c2x0.yaml, so this is only for the
SDRAM.

Jan

> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  MAINTAINERS | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index be8e4af8ed64..ec75414db0ce 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -6574,6 +6574,7 @@ EDAC-ARMADA
>  M:	Jan Luebbe <jlu@pengutronix.de>
>  L:	linux-edac@vger.kernel.org
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>  F:	drivers/edac/armada_xp_*
>  
>  EDAC-AST2500

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 2/2] MAINTAINERS: EDAC/armada_xp: include dt-bindings

[Rob Herring]

On Tue, Aug 17, 2021 at 12:50:22PM +0200, Jan Lübbe wrote:
> On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
> > Include dt-bindings for Marvell Armada XP SDRAM and L2 cache ECC in the
> > EDAC-ARMADA entry.
> 
> The L2 cache binding is already described in
> Documentation/devicetree/bindings/arm/l2c2x0.yaml, so this is only for the
> SDRAM.

Fixed up and applied.

Rob

Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Jan Lübbe]

On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
> Convert Marvell MVEBU SDRAM controller bindings to DT schema format
> using json-schema.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
>  .../mvebu-sdram-controller.txt                | 21 -------------
>  2 files changed, 31 insertions(+), 21 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> new file mode 100644
> index 000000000000..14a6bc8f421f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> @@ -0,0 +1,31 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell MVEBU SDRAM controller
> +
> +maintainers:
> +  - Jan Luebbe <jlu@pengutronix.de>
> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> +
> +properties:
> +  compatible:
> +    const: marvell,armada-xp-sdram-controller
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    memory-controller@1400 {
> +        compatible = "marvell,armada-xp-sdram-controller";
> +        reg = <0x1400 0x500>;
> +    };
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> deleted file mode 100644
> index 89657d1d4cd4..000000000000
> --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> +++ /dev/null
> @@ -1,21 +0,0 @@
> -Device Tree bindings for MVEBU SDRAM controllers
> -
> -The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
> -differs from one SoC variant to another, but they also share a number
> -of commonalities.
> -
> -For now, this Device Tree binding documentation only documents the
> -Armada XP SDRAM controller.

Please keep the description, otherwise it would be confusing why the binding is
named marvell,mvebu-sdram-controller.yaml although it (currenly) only applies to
the Armada XP.

Jan

> -
> -Required properties:
> -
> - - compatible: for Armada XP, "marvell,armada-xp-sdram-controller"
> - - reg: a resource specifier for the register space, which should
> -   include all SDRAM controller registers as per the datasheet.
> -
> -Example:
> -
> -sdramc@1400 {
> -	compatible = "marvell,armada-xp-sdram-controller";
> -	reg = <0x1400 0x500>;
> -};

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Krzysztof Kozlowski]

On 17/08/2021 12:46, Jan Lübbe wrote:
> On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
>> Convert Marvell MVEBU SDRAM controller bindings to DT schema format
>> using json-schema.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> ---
>>  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
>>  .../mvebu-sdram-controller.txt                | 21 -------------
>>  2 files changed, 31 insertions(+), 21 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>>
>> diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>> new file mode 100644
>> index 000000000000..14a6bc8f421f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>> @@ -0,0 +1,31 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Marvell MVEBU SDRAM controller
>> +
>> +maintainers:
>> +  - Jan Luebbe <jlu@pengutronix.de>
>> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: marvell,armada-xp-sdram-controller
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    memory-controller@1400 {
>> +        compatible = "marvell,armada-xp-sdram-controller";
>> +        reg = <0x1400 0x500>;
>> +    };
>> diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>> deleted file mode 100644
>> index 89657d1d4cd4..000000000000
>> --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>> +++ /dev/null
>> @@ -1,21 +0,0 @@
>> -Device Tree bindings for MVEBU SDRAM controllers
>> -
>> -The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
>> -differs from one SoC variant to another, but they also share a number
>> -of commonalities.
>> -
>> -For now, this Device Tree binding documentation only documents the
>> -Armada XP SDRAM controller.
> 
> Please keep the description, otherwise it would be confusing why the binding is
> named marvell,mvebu-sdram-controller.yaml although it (currenly) only applies to
> the Armada XP.
> 

The description does not explain why it only documents Armada XP, so it
just duplicates what is in "compatible" part of bindings. How is the
confusion removed by saying "we document currently only Armada XP"? What
changes?

The entire description (with first paragraph) might make it a derivative
work, so I would need Ack or SoB from author to relicense it (Cc: Thomas
Petazzoni).


Best regards,
Krzysztof

Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Jan Lübbe]

On Tue, 2021-08-17 at 12:52 +0200, Krzysztof Kozlowski wrote:
> On 17/08/2021 12:46, Jan Lübbe wrote:
> > On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
> > > Convert Marvell MVEBU SDRAM controller bindings to DT schema format
> > > using json-schema.
> > > 
> > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> > > ---
> > >  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
> > >  .../mvebu-sdram-controller.txt                | 21 -------------
> > >  2 files changed, 31 insertions(+), 21 deletions(-)
> > >  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > >  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > 
> > > diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > > new file mode 100644
> > > index 000000000000..14a6bc8f421f
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > > @@ -0,0 +1,31 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Marvell MVEBU SDRAM controller
> > > +
> > > +maintainers:
> > > +  - Jan Luebbe <jlu@pengutronix.de>
> > > +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: marvell,armada-xp-sdram-controller
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +    memory-controller@1400 {
> > > +        compatible = "marvell,armada-xp-sdram-controller";
> > > +        reg = <0x1400 0x500>;
> > > +    };
> > > diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > deleted file mode 100644
> > > index 89657d1d4cd4..000000000000
> > > --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > +++ /dev/null
> > > @@ -1,21 +0,0 @@
> > > -Device Tree bindings for MVEBU SDRAM controllers
> > > -
> > > -The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
> > > -differs from one SoC variant to another, but they also share a number
> > > -of commonalities.
> > > -
> > > -For now, this Device Tree binding documentation only documents the
> > > -Armada XP SDRAM controller.
> > 
> > Please keep the description, otherwise it would be confusing why the binding is
> > named marvell,mvebu-sdram-controller.yaml although it (currenly) only applies to
> > the Armada XP.
> > 
> 
> The description does not explain why it only documents Armada XP, so it
> just duplicates what is in "compatible" part of bindings. How is the
> confusion removed by saying "we document currently only Armada XP"? What
> changes?

Then perhaps the binding should be named marvell,armada-xp-sdram-
controller.yaml? It find it unlikely that support for the other SoC's
controllers will be added, given their age.

Jan

> The entire description (with first paragraph) might make it a derivative
> work, so I would need Ack or SoB from author to relicense it (Cc: Thomas
> Petazzoni).
> 
> 
> Best regards,
> Krzysztof
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Krzysztof Kozlowski]

On 17/08/2021 12:58, Jan Lübbe wrote:
> On Tue, 2021-08-17 at 12:52 +0200, Krzysztof Kozlowski wrote:
>> On 17/08/2021 12:46, Jan Lübbe wrote:
>>> On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
>>>> Convert Marvell MVEBU SDRAM controller bindings to DT schema format
>>>> using json-schema.
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>>>> ---
>>>>  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
>>>>  .../mvebu-sdram-controller.txt                | 21 -------------
>>>>  2 files changed, 31 insertions(+), 21 deletions(-)
>>>>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>>>>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>>>> new file mode 100644
>>>> index 000000000000..14a6bc8f421f
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>>>> @@ -0,0 +1,31 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Marvell MVEBU SDRAM controller
>>>> +
>>>> +maintainers:
>>>> +  - Jan Luebbe <jlu@pengutronix.de>
>>>> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    const: marvell,armada-xp-sdram-controller
>>>> +
>>>> +  reg:
>>>> +    maxItems: 1
>>>> +
>>>> +required:
>>>> +  - compatible
>>>> +  - reg
>>>> +
>>>> +additionalProperties: false
>>>> +
>>>> +examples:
>>>> +  - |
>>>> +    memory-controller@1400 {
>>>> +        compatible = "marvell,armada-xp-sdram-controller";
>>>> +        reg = <0x1400 0x500>;
>>>> +    };
>>>> diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>>>> deleted file mode 100644
>>>> index 89657d1d4cd4..000000000000
>>>> --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
>>>> +++ /dev/null
>>>> @@ -1,21 +0,0 @@
>>>> -Device Tree bindings for MVEBU SDRAM controllers
>>>> -
>>>> -The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
>>>> -differs from one SoC variant to another, but they also share a number
>>>> -of commonalities.
>>>> -
>>>> -For now, this Device Tree binding documentation only documents the
>>>> -Armada XP SDRAM controller.
>>>
>>> Please keep the description, otherwise it would be confusing why the binding is
>>> named marvell,mvebu-sdram-controller.yaml although it (currenly) only applies to
>>> the Armada XP.
>>>
>>
>> The description does not explain why it only documents Armada XP, so it
>> just duplicates what is in "compatible" part of bindings. How is the
>> confusion removed by saying "we document currently only Armada XP"? What
>> changes?
> 
> Then perhaps the binding should be named marvell,armada-xp-sdram-
> controller.yaml? It find it unlikely that support for the other SoC's
> controllers will be added, given their age.

Sure, could be like this but there is no confusion here and no need to
fix anything. It is understandable and common to name bindings file as
general (e.g. for group of devices) even though only limited amount of
devices are currently documented/described. It's almost everywhere like
this, when the bindings are not complete. I don't see where is the
confusion.

Look at: arm/marvell/armada-cpu-reset.txt which mentions several SoCs
while only three compatibles are documented.
arm/marvell/armada-cpu-reset.txt has generic name and describes only one
reset controller (370) while being used on multiple SoC (370, 375, 38x,
39x). I could go like this all over the bindings...


Best regards,
Krzysztof

Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Jan Lübbe]

On Tue, 2021-08-17 at 13:06 +0200, Krzysztof Kozlowski wrote:
> On 17/08/2021 12:58, Jan Lübbe wrote:
> > On Tue, 2021-08-17 at 12:52 +0200, Krzysztof Kozlowski wrote:
> > > On 17/08/2021 12:46, Jan Lübbe wrote:
> > > > On Tue, 2021-08-17 at 11:38 +0200, Krzysztof Kozlowski wrote:
> > > > > Convert Marvell MVEBU SDRAM controller bindings to DT schema format
> > > > > using json-schema.
> > > > > 
> > > > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> > > > > ---
> > > > >  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
> > > > >  .../mvebu-sdram-controller.txt                | 21 -------------
> > > > >  2 files changed, 31 insertions(+), 21 deletions(-)
> > > > >  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > > > >  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > > > 
> > > > > diff --git a/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > > > > new file mode 100644
> > > > > index 000000000000..14a6bc8f421f
> > > > > --- /dev/null
> > > > > +++ b/Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
> > > > > @@ -0,0 +1,31 @@
> > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > > +%YAML 1.2
> > > > > +---
> > > > > +$id: http://devicetree.org/schemas/memory-controllers/marvell,mvebu-sdram-controller.yaml#
> > > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > > +
> > > > > +title: Marvell MVEBU SDRAM controller
> > > > > +
> > > > > +maintainers:
> > > > > +  - Jan Luebbe <jlu@pengutronix.de>
> > > > > +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> > > > > +
> > > > > +properties:
> > > > > +  compatible:
> > > > > +    const: marvell,armada-xp-sdram-controller
> > > > > +
> > > > > +  reg:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +required:
> > > > > +  - compatible
> > > > > +  - reg
> > > > > +
> > > > > +additionalProperties: false
> > > > > +
> > > > > +examples:
> > > > > +  - |
> > > > > +    memory-controller@1400 {
> > > > > +        compatible = "marvell,armada-xp-sdram-controller";
> > > > > +        reg = <0x1400 0x500>;
> > > > > +    };
> > > > > diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > > > deleted file mode 100644
> > > > > index 89657d1d4cd4..000000000000
> > > > > --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> > > > > +++ /dev/null
> > > > > @@ -1,21 +0,0 @@
> > > > > -Device Tree bindings for MVEBU SDRAM controllers
> > > > > -
> > > > > -The Marvell EBU SoCs all have a SDRAM controller. The SDRAM controller
> > > > > -differs from one SoC variant to another, but they also share a number
> > > > > -of commonalities.
> > > > > -
> > > > > -For now, this Device Tree binding documentation only documents the
> > > > > -Armada XP SDRAM controller.
> > > > 
> > > > Please keep the description, otherwise it would be confusing why the binding is
> > > > named marvell,mvebu-sdram-controller.yaml although it (currenly) only applies to
> > > > the Armada XP.
> > > > 
> > > 
> > > The description does not explain why it only documents Armada XP, so it
> > > just duplicates what is in "compatible" part of bindings. How is the
> > > confusion removed by saying "we document currently only Armada XP"? What
> > > changes?
> > 
> > Then perhaps the binding should be named marvell,armada-xp-sdram-
> > controller.yaml? It find it unlikely that support for the other SoC's
> > controllers will be added, given their age.
> 
> Sure, could be like this but there is no confusion here and no need to
> fix anything. It is understandable and common to name bindings file as
> general (e.g. for group of devices) even though only limited amount of
> devices are currently documented/described. It's almost everywhere like
> this, when the bindings are not complete. I don't see where is the
> confusion.
> 
> Look at: arm/marvell/armada-cpu-reset.txt which mentions several SoCs
> while only three compatibles are documented.
> arm/marvell/armada-cpu-reset.txt has generic name and describes only one
> reset controller (370) while being used on multiple SoC (370, 375, 38x,
> 39x). I could go like this all over the bindings...

OK, you convinced me. Thanks for the explanation.

Jan
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Re: [PATCH 1/2] dt-bindings: memory: convert Marvell MVEBU SDRAM controller to dtschema

[Rob Herring]

On Tue, 17 Aug 2021 11:38:06 +0200, Krzysztof Kozlowski wrote:
> Convert Marvell MVEBU SDRAM controller bindings to DT schema format
> using json-schema.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  .../marvell,mvebu-sdram-controller.yaml       | 31 +++++++++++++++++++
>  .../mvebu-sdram-controller.txt                | 21 -------------
>  2 files changed, 31 insertions(+), 21 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
>  delete mode 100644 Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt
> 

Applied, thanks!