[PATCH v2 3/5] dt-bindings: memory: additional compatible strings for Broadcom DPFE
Krzysztof Kozlowski
krzysztof.kozlowski at linaro.org
Tue Jan 23 13:27:14 PST 2024
On 19/01/2024 22:52, Markus Mayer wrote:
> Add versioned compatible strings for Broadcom DPFE. These take the form
> brcm,dpfe-cpu-v<N> where <N> is a number from 1 to 4.
>
> The chip-specific strings have been kept for compatibility purposes
> (hardware is in the field). For new chips, the properly versioned
> compatible string should be used.
>
> Signed-off-by: Markus Mayer <mmayer at broadcom.com>
> ---
> .../memory-controllers/brcm,dpfe-cpu.yaml | 21 ++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.yaml b/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.yaml
> index 3f00bc2fd3ec..42c8160d95d1 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.yaml
> @@ -10,9 +10,28 @@ maintainers:
> - Krzysztof Kozlowski <krzk at kernel.org>
> - Markus Mayer <mmayer at broadcom.com>
>
> +description: |
> +
Drop blank line.
> + The DCPU (DDR PHY Front End CPU) interfaces directly with the DDR PHY
> + chip on Broadcom STB SoCs. An API exists for other agents to retrieve
> + or set certain DDR PHY chip parameters by JEDEC.
> +
> + Different, incompatible versions of this API have been created over
> + time. The API has changed for the some chips as development progressed
> + and features were added or changed.
> +
> + We rely on the boot firmware (which already knows the API version
> + required) to populate Device Tree with the corresponding compatible
> + string.
> +
> properties:
> compatible:
> items:
> + - enum:
> + - brcm,dpfe-cpu-v1
> + - brcm,dpfe-cpu-v2
> + - brcm,dpfe-cpu-v3
> + - brcm,dpfe-cpu-v4
I don't see my comment resolved - except more unusual order of
compatibles - and nothing in commit msg explains my previous concerns.
I think my final comment was pretty clear yet ignored completely. There
was no follow up:
https://lore.kernel.org/all/3fff866f-fbe8-4d23-87f3-275380adf3d4@linaro.org/
so with ignored comments: NAK
Best regards,
Krzysztof
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