linux-kernel - Re: [PATCH v3 2/2] dt-bindings: remoteproc: qcom: Add SC7280 MSS bindings

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Message-ID: <436e497f-b43c-4543-62d4-e7aea3d37ac7@linaro.org>
Date:   Wed, 11 May 2022 20:10:54 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sibi Sankar <quic_sibis@...cinc.com>, bjorn.andersson@...aro.org,
        robh+dt@...nel.org, Sireesh Kodali <sireeshkodali1@...il.com>
Cc:     ohad@...ery.com, agross@...nel.org, mathieu.poirier@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, mka@...omium.org,
        krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH v3 2/2] dt-bindings: remoteproc: qcom: Add SC7280 MSS
 bindings

On 11/05/2022 10:19, Sibi Sankar wrote:
> Add MSS PIL loading bindings for SC7280 SoCs.

Why not converting existing bindings? The compatible is already there,
so you duplicated its binding.

> 
> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
> ---
> 
> v3:
>  * Re-ordered clock list, fixed pdc_sync typo [Rob/Matthias]
> 
>  .../bindings/remoteproc/qcom,sc7280-mss-pil.yaml   | 261 +++++++++++++++++++++
>  1 file changed, 261 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
> new file mode 100644
> index 000000000000..2f95bfd7b3eb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
> @@ -0,0 +1,261 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/qcom,sc7280-mss-pil.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm SC7280 MSS Peripheral Image Loader
> +
> +maintainers:
> +  - Sibi Sankar <quic_sibis@...cinc.com>
> +
> +description:
> +  This document defines the binding for a component that loads and boots firmware
> +  on the Qualcomm Technology Inc. SC7280 Modem Hexagon Core.

s/This document defines the binding for//
Instead describe the hardware.


Anyway, similar patch was already sent:
https://lore.kernel.org/all/20220511161602.117772-7-sireeshkodali1@gmail.com/
Except its several issues, it is much more complete and specific.

> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,sc7280-mss-pil
> +
> +  reg:
> +    items:
> +      - description: MSS QDSP6 registers
> +      - description: RMB registers
> +
> +  reg-names:
> +    items:
> +      - const: qdsp6
> +      - const: rmb
> +
> +  iommus:
> +    items:
> +      - description: MSA Stream 1
> +      - description: MSA Stream 2
> +
> +  interconnects:
> +    items:
> +      - description: Path leading to system memory
> +
> +  interrupts:
> +    items:
> +      - description: Watchdog interrupt
> +      - description: Fatal interrupt
> +      - description: Ready interrupt
> +      - description: Handover interrupt
> +      - description: Stop acknowledge interrupt
> +      - description: Shutdown acknowledge interrupt
> +
> +  interrupt-names:
> +    items:
> +      - const: wdog
> +      - const: fatal
> +      - const: ready
> +      - const: handover
> +      - const: stop-ack
> +      - const: shutdown-ack
> +
> +  clocks:
> +    items:
> +      - description: GCC MSS IFACE clock
> +      - description: GCC MSS OFFLINE clock
> +      - description: GCC MSS SNOC_AXI clock
> +      - description: RPMH PKA clock
> +      - description: RPMH XO clock
> +
> +  clock-names:
> +    items:
> +      - const: iface
> +      - const: offline
> +      - const: snoc_axi
> +      - const: pka
> +      - const: xo
> +
> +  power-domains:
> +    items:
> +      - description: CX power domain
> +      - description: MSS power domain
> +
> +  power-domain-names:
> +    items:
> +      - const: cx
> +      - const: mss
> +
> +  resets:
> +    items:
> +      - description: AOSS restart
> +      - description: PDC reset
> +
> +  reset-names:
> +    items:
> +      - const: mss_restart
> +      - const: pdc_reset
> +
> +  memory-region:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array

This should be defined by core schema and ref should not be needed.

> +    description: Phandle reference to the reserved-memory for the MBA region followed
> +                 by the modem region.

maxItems

> +
> +  firmware-name:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    description:
> +      The name of the firmware which should be loaded for this remote
> +      processor.
> +
> +  qcom,halt-regs:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Phandle reference to a syscon representing TCSR followed by the
> +      four offsets within syscon for q6, modem, nc and vq6 halt registers.
> +
> +  qcom,ext-regs:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Two phandle references to syscons representing TCSR_REG and TCSR register
> +      space followed by the two offsets within the syscon to force_clk_en/rscc_disable
> +      and axim1_clk_off/crypto_clk_off registers respectively.
> +
> +  qcom,qaccept-regs:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Phandle reference to a syscon representing TCSR followed by the
> +      three offsets within syscon for mdm, cx and axi qaccept registers.
> +
> +  qcom,qmp:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: Reference to the AOSS side-channel message RAM.
> +
> +  qcom,smem-states:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: States used by the AP to signal the Hexagon core
> +    items:
> +      - description: Stop the modem
> +
> +  qcom,smem-state-names:
> +    $ref: /schemas/types.yaml#/definitions/string

For some reason you decided to make the same mistakes as the
https://lore.kernel.org/all/20220511161602.117772-7-sireeshkodali1@gmail.com/

even though all other bindings with this property looks correct.

Please, re-use existing bindings, do not reinvent things in incorrect way.

I'll stop the review, you need to align first.

What is weird, your v2 was before Sireesh's patch, and you both made the
same mistakes which do not exist in current bindings.

All comments from his set apply here. It seems that his patchset came
after yours and copied stuff from your bindings, so yours would be FIFO,
if you made proper binding conversion.

Best regards,
Krzysztof