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Date: Wed, 7 Oct 2020 10:53:52 -0500
From: Rob Herring <robh@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: rjw@...ysocki.net, viresh.kumar@...aro.org,
linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, bjorn.andersson@...aro.org,
linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: cpufreq: cpufreq-qcom-hw: Convert to YAML
bindings
On Tue, Oct 06, 2020 at 03:20:47PM +0530, Manivannan Sadhasivam wrote:
> Convert Qualcomm cpufreq devicetree binding to YAML.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
> .../bindings/cpufreq/cpufreq-qcom-hw.txt | 172 --------------
> .../bindings/cpufreq/cpufreq-qcom-hw.yaml | 212 ++++++++++++++++++
> 2 files changed, 212 insertions(+), 172 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> new file mode 100644
> index 000000000000..a11c69a29b5d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> @@ -0,0 +1,212 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Technologies, Inc. CPUFREQ
> +
> +maintainers:
> + - Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> +
> +description: |
> +
> + CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
> + SoCs to manage frequency in hardware. It is capable of controlling frequency
> + for multiple clusters.
> +
> +properties:
> + compatible:
> + oneOf:
> + - description: v1 of CPUFREQ HW
> + items:
> + - const: qcom,cpufreq-hw
> +
> + - description: v2 of CPUFREQ HW (EPSS)
> + items:
> + - enum:
> + - qcom,sm8250-cpufreq-epss
> + - const: qcom,cpufreq-epss
> +
> + reg:
> + minItems: 2
> + maxItems: 3
> + items:
> + - description: Frequency domain 0 register region
> + - description: Frequency domain 1 register region
> + - description: Frequency domain 2 register region
> +
> + reg-names:
> + minItems: 2
> + maxItems: 3
> + items:
> + - const: freq-domain0
> + - const: freq-domain1
> + - const: freq-domain2
> +
> + clocks:
> + items:
> + - description: XO Clock
> + - description: GPLL0 Clock
> +
> + clock-names:
> + items:
> + - const: xo
> + - const: alternate
> +
> + '#freq-domain-cells':
> + const: 1
> +
> + qcom,freq-domain:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> + maxItems: 1
> + description:
> + Devices supporting freq-domain must set their "qcom,freq-domain"
> + property with phandle to a cpufreq_hw followed by the Domain ID(0/1)
> + in the CPU DT node.
This doesn't belong here as it goes in cpu nodes. You're going to need
to define a QCom cpu schema that defines this.
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - clocks
> + - clock-names
> + - '#freq-domain-cells'
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> + #include <dt-bindings/clock/qcom,rpmh.h>
> +
> + // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster
> + // switch DCVS state together.
> + cpus {
> + #address-cells = <2>;
> + #size-cells = <0>;
> +
> + CPU0: cpu@0 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x0>;
> + enable-method = "psci";
> + next-level-cache = <&L2_0>;
> + qcom,freq-domain = <&cpufreq_hw 0>;
> + L2_0: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + L3_0: l3-cache {
> + compatible = "cache";
> + };
> + };
> + };
> +
> + CPU1: cpu@100 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x100>;
> + enable-method = "psci";
> + next-level-cache = <&L2_100>;
> + qcom,freq-domain = <&cpufreq_hw 0>;
> + L2_100: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU2: cpu@200 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x200>;
> + enable-method = "psci";
> + next-level-cache = <&L2_200>;
> + qcom,freq-domain = <&cpufreq_hw 0>;
> + L2_200: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU3: cpu@300 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x300>;
> + enable-method = "psci";
> + next-level-cache = <&L2_300>;
> + qcom,freq-domain = <&cpufreq_hw 0>;
> + L2_300: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU4: cpu@400 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x400>;
> + enable-method = "psci";
> + next-level-cache = <&L2_400>;
> + qcom,freq-domain = <&cpufreq_hw 1>;
> + L2_400: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU5: cpu@500 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x500>;
> + enable-method = "psci";
> + next-level-cache = <&L2_500>;
> + qcom,freq-domain = <&cpufreq_hw 1>;
> + L2_500: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU6: cpu@600 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x600>;
> + enable-method = "psci";
> + next-level-cache = <&L2_600>;
> + qcom,freq-domain = <&cpufreq_hw 1>;
> + L2_600: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> +
> + CPU7: cpu@700 {
> + device_type = "cpu";
> + compatible = "qcom,kryo385";
> + reg = <0x0 0x700>;
> + enable-method = "psci";
> + next-level-cache = <&L2_700>;
> + qcom,freq-domain = <&cpufreq_hw 1>;
> + L2_700: l2-cache {
> + compatible = "cache";
> + next-level-cache = <&L3_0>;
> + };
> + };
> + };
> +
> + soc {
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + cpufreq@...43000 {
> + compatible = "qcom,cpufreq-hw";
> + reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
> + reg-names = "freq-domain0", "freq-domain1";
> +
> + clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
> + clock-names = "xo", "alternate";
> +
> + #freq-domain-cells = <1>;
> + };
> + };
> +...
> --
> 2.17.1
>
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