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Message-ID: <20210701190313.GA2736150@robh.at.kernel.org>
Date: Thu, 1 Jul 2021 13:03:13 -0600
From: Rob Herring <robh@...nel.org>
To: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Andy Gross <agross@...nel.org>, Sibi S <sibis@...eaurora.org>,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] dt-bindings: soc: qcom: aoss: Convert to YAML
On Fri, Jun 25, 2021 at 04:40:17PM -0700, Bjorn Andersson wrote:
> Convert to YAML in order to allow validation.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>
> I'm aware that this conflicts with Sibi's removal of '#power-domain-cells', but
> that's a trivial change regardless of which of the two patches gets in first.
>
> .../bindings/soc/qcom/qcom,aoss-qmp.txt | 90 --------------
> .../bindings/soc/qcom/qcom,aoss-qmp.yaml | 115 ++++++++++++++++++
> 2 files changed, 115 insertions(+), 90 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
> create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.yaml
>
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
> deleted file mode 100644
> index 3747032311a4..000000000000
> --- a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
> +++ /dev/null
> @@ -1,90 +0,0 @@
> -Qualcomm Always-On Subsystem side channel binding
> -
> -This binding describes the hardware component responsible for side channel
> -requests to the always-on subsystem (AOSS), used for certain power management
> -requests that is not handled by the standard RPMh interface. Each client in the
> -SoC has it's own block of message RAM and IRQ for communication with the AOSS.
> -The protocol used to communicate in the message RAM is known as Qualcomm
> -Messaging Protocol (QMP)
> -
> -The AOSS side channel exposes control over a set of resources, used to control
> -a set of debug related clocks and to affect the low power state of resources
> -related to the secondary subsystems. These resources are exposed as a set of
> -power-domains.
> -
> -- compatible:
> - Usage: required
> - Value type: <string>
> - Definition: must be one of:
> - "qcom,sc7180-aoss-qmp"
> - "qcom,sc7280-aoss-qmp"
> - "qcom,sc8180x-aoss-qmp"
> - "qcom,sdm845-aoss-qmp"
> - "qcom,sm8150-aoss-qmp"
> - "qcom,sm8250-aoss-qmp"
> - "qcom,sm8350-aoss-qmp"
> - and:
> - "qcom,aoss-qmp"
> -
> -- reg:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: the base address and size of the message RAM for this
> - client's communication with the AOSS
> -
> -- interrupts:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: should specify the AOSS message IRQ for this client
> -
> -- mboxes:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: reference to the mailbox representing the outgoing doorbell
> - in APCS for this client, as described in mailbox/mailbox.txt
> -
> -- #clock-cells:
> - Usage: optional
> - Value type: <u32>
> - Definition: must be 0
> - The single clock represents the QDSS clock.
> -
> -- #power-domain-cells:
> - Usage: optional
> - Value type: <u32>
> - Definition: must be 1
> - The provided power-domains are:
> - CDSP state (0), LPASS state (1), modem state (2), SLPI
> - state (3), SPSS state (4) and Venus state (5).
> -
> -= SUBNODES
> -The AOSS side channel also provides the controls for three cooling devices,
> -these are expressed as subnodes of the QMP node. The name of the node is used
> -to identify the resource and must therefor be "cx", "mx" or "ebi".
> -
> -- #cooling-cells:
> - Usage: optional
> - Value type: <u32>
> - Definition: must be 2
> -
> -= EXAMPLE
> -
> -The following example represents the AOSS side-channel message RAM and the
> -mechanism exposing the power-domains, as found in SDM845.
> -
> - aoss_qmp: qmp@...0000 {
> - compatible = "qcom,sdm845-aoss-qmp", "qcom,aoss-qmp";
> - reg = <0x0c300000 0x100000>;
> - interrupts = <GIC_SPI 389 IRQ_TYPE_EDGE_RISING>;
> - mboxes = <&apss_shared 0>;
> -
> - #power-domain-cells = <1>;
> -
> - cx_cdev: cx {
> - #cooling-cells = <2>;
> - };
> -
> - mx_cdev: mx {
> - #cooling-cells = <2>;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.yaml
> new file mode 100644
> index 000000000000..1b9de8e49356
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.yaml
> @@ -0,0 +1,115 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/qcom/qcom,aoss-qmp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Always-On Subsystem side channel binding
> +
> +maintainers:
> + - Bjorn Andersson <bjorn.andersson@...aro.org>
> +
> +description:
> + This binding describes the hardware component responsible for side channel
> + requests to the always-on subsystem (AOSS), used for certain power management
> + requests that is not handled by the standard RPMh interface. Each client in the
> + SoC has it's own block of message RAM and IRQ for communication with the AOSS.
> + The protocol used to communicate in the message RAM is known as Qualcomm
> + Messaging Protocol (QMP)
> +
> + The AOSS side channel exposes control over a set of resources, used to control
> + a set of debug related clocks and to affect the low power state of resources
> + related to the secondary subsystems. These resources are exposed as a set of
> + power-domains.
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - "qcom,sc7180-aoss-qmp"
> + - "qcom,sc7280-aoss-qmp"
> + - "qcom,sc8180x-aoss-qmp"
> + - "qcom,sdm845-aoss-qmp"
> + - "qcom,sm8150-aoss-qmp"
> + - "qcom,sm8250-aoss-qmp"
> + - "qcom,sm8350-aoss-qmp"
> + - const: "qcom,aoss-qmp"
Don't need quotes. With that and the indentation fixed:
Reviewed-by: Rob Herring <robh@...nel.org>
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