RE: [PATCH v3 5/8] dt-bindings: memory: lpddr3: deprecate manufacturer ID

["Alim Akhtar" <alim.akhtar@samsung.com>]

Hi Krzysztof

>-----Original Message-----
>From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@canonical.com]
>Sent: Sunday, February 6, 2022 7:28 PM
>To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>; Rob Herring
><robh+dt@kernel.org>; Lukasz Luba <lukasz.luba@arm.com>; Alim Akhtar
><alim.akhtar@samsung.com>; Dmitry Osipenko <digetx@gmail.com>; linux-
>kernel@vger.kernel.org; devicetree@vger.kernel.org; linux-
>pm@vger.kernel.org; linux-samsung-soc@vger.kernel.org; linux-arm-
>kernel@lists.infradead.org
>Subject: [PATCH v3 5/8] dt-bindings: memory: lpddr3: deprecate
>manufacturer ID
>
>The memory manufacturer should be described in vendor part of compatible,
>so there is no need to duplicate it in a separate property.
>Similarly is done in LPDDR2 bindings.
>
>Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>---
> .../bindings/memory-controllers/ddr/jedec,lpddr3.yaml         | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
>diff --git a/Documentation/devicetree/bindings/memory-
>controllers/ddr/jedec,lpddr3.yaml
>b/Documentation/devicetree/bindings/memory-
>controllers/ddr/jedec,lpddr3.yaml
>index d6787b5190ee..3bcba15098ea 100644
>--- a/Documentation/devicetree/bindings/memory-
>controllers/ddr/jedec,lpddr3.yaml
>+++ b/Documentation/devicetree/bindings/memory-
>controllers/ddr/jedec,lpd
>+++ dr3.yaml
>@@ -40,7 +40,9 @@ properties:
>   manufacturer-id:
>     $ref: /schemas/types.yaml#/definitions/uint32
>     description: |
>-      Manufacturer ID value read from Mode Register 5.
>+      Manufacturer ID value read from Mode Register 5.  The property is
>+      deprecated, manufacturer should be derived from the compatible.
>+    deprecated: true
>

Shouldn't it be the other way? As DT describes hardware and MR5 does contain
the Manufacturer ID, 
so getting Manufacturer ID from MR5 makes aligned to hardware description.


>   revision-id:
>     $ref: /schemas/types.yaml#/definitions/uint32-array
>--
>2.32.0