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Date: Thu, 23 Jun 2022 18:01:03 -0700
From: Guru Das Srinagesh <quic_gurus@...cinc.com>
To: Robert Marko <robimarko@...il.com>
CC: <agross@...nel.org>, <bjorn.andersson@...aro.org>,
<robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
<linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: firmware: qcom-scm: convert to dtschema
On Thu, Jun 23, 2022 at 08:25:42PM +0200, Robert Marko wrote:
> Convert bindings for Qualcomm SCM to dtschema.
>
> SoC compatibles that were used, but not documented were added.
>
> Signed-off-by: Robert Marko <robimarko@...il.com>
> ---
> .../devicetree/bindings/firmware/qcom,scm.txt | 57 --------
> .../bindings/firmware/qcom,scm.yaml | 124 ++++++++++++++++++
> 2 files changed, 124 insertions(+), 57 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/firmware/qcom,scm.txt
> create mode 100644 Documentation/devicetree/bindings/firmware/qcom,scm.yaml
>
> diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.txt b/Documentation/devicetree/bindings/firmware/qcom,scm.txt
> deleted file mode 100644
> index 0f4e5ab26477..000000000000
> --- a/Documentation/devicetree/bindings/firmware/qcom,scm.txt
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -QCOM Secure Channel Manager (SCM)
> -
> -Qualcomm processors include an interface to communicate to the secure firmware.
> -This interface allows for clients to request different types of actions. These
> -can include CPU power up/down, HDCP requests, loading of firmware, and other
> -assorted actions.
> -
> -Required properties:
> -- compatible: must contain one of the following:
> - * "qcom,scm-apq8064"
> - * "qcom,scm-apq8084"
> - * "qcom,scm-ipq4019"
> - * "qcom,scm-ipq806x"
> - * "qcom,scm-ipq8074"
> - * "qcom,scm-mdm9607"
> - * "qcom,scm-msm8226"
> - * "qcom,scm-msm8660"
> - * "qcom,scm-msm8916"
> - * "qcom,scm-msm8953"
> - * "qcom,scm-msm8960"
> - * "qcom,scm-msm8974"
> - * "qcom,scm-msm8976"
> - * "qcom,scm-msm8994"
> - * "qcom,scm-msm8996"
> - * "qcom,scm-msm8998"
> - * "qcom,scm-sc7180"
> - * "qcom,scm-sc7280"
> - * "qcom,scm-sdm845"
> - * "qcom,scm-sdx55"
> - * "qcom,scm-sm6350"
> - * "qcom,scm-sm8150"
> - * "qcom,scm-sm8250"
> - * "qcom,scm-sm8350"
> - * "qcom,scm-sm8450"
> - and:
> - * "qcom,scm"
> -- clocks: Specifies clocks needed by the SCM interface, if any:
> - * core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660" and
> - "qcom,scm-msm8960"
> - * core, iface and bus clocks required for "qcom,scm-apq8084",
> - "qcom,scm-msm8916", "qcom,scm-msm8953", "qcom,scm-msm8974" and "qcom,scm-msm8976"
> -- clock-names: Must contain "core" for the core clock, "iface" for the interface
> - clock and "bus" for the bus clock per the requirements of the compatible.
> -- qcom,dload-mode: phandle to the TCSR hardware block and offset of the
> - download mode control register (optional)
> -
> -Example for MSM8916:
> -
> - firmware {
> - scm {
> - compatible = "qcom,msm8916", "qcom,scm";
> - clocks = <&gcc GCC_CRYPTO_CLK> ,
> - <&gcc GCC_CRYPTO_AXI_CLK>,
> - <&gcc GCC_CRYPTO_AHB_CLK>;
> - clock-names = "core", "bus", "iface";
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
> new file mode 100644
> index 000000000000..7dd7beb39846
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
> @@ -0,0 +1,124 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/firmware/qcom,scm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: QCOM Secure Channel Manager (SCM) bindings
> +
> +maintainers:
> + - Robert Marko <robimarko@...il.com>
I'd like to volunteer my name as well, if that's okay:
Guru Das Srinagesh <quic_gurus@...cinc.com>
> +
> +description: |
...
> +
> + '#reset-cells':
> + const: 1
This isn't part of the original file - could you please explain why this is
being added?
> +
> + qcom,dload-mode:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> + description:
> + Phandle to the TCSR hardware block and offset of the download mode control register
> +
> +required:
> + - compatible
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + enum:
> + - qcom,scm-apq8064
> + - qcom,scm-msm8660
> + - qcom,scm-msm8960
> + then:
> + properties:
> + clocks:
> + items:
> + - description: SCM core clock
> + clock-names:
> + items:
> + - const: core
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + enum:
> + - qcom,scm-apq8084
> + - qcom,scm-mdm9607
> + - qcom,scm-msm8916
> + - qcom,scm-msm8953
> + - qcom,scm-msm8974
> + - qcom,scm-msm8976
> + then:
> + properties:
> + clocks:
> + items:
> + - description: SCM core clock
> + - description: SCM bus clock
> + - description: SCM interface clock
> + clock-names:
> + items:
> + - const: core
> + - const: bus
> + - const: iface
Thanks, I had this YAML conversion patch done locally, but couldn't figure out
how to represent the above logic in YAML. Thank you for this patch.
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/qcom,gcc-msm8916.h>
> + firmware {
> + scm {
> + compatible = "qcom,scm-msm8916", "qcom,scm";
> +
> + clocks = <&gcc GCC_CRYPTO_CLK>,
> + <&gcc GCC_CRYPTO_AXI_CLK>,
> + <&gcc GCC_CRYPTO_AHB_CLK>;
> + clock-names = "core", "bus", "iface";
> + qcom,dload-mode = <&tcsr 0x6100>;
> + };
> + };
> --
> 2.36.1
>
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