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Message-ID: <YUfa9jF+F3ght1lN@builder.lan>
Date: Sun, 19 Sep 2021 19:51:02 -0500
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...ainline.org>
Cc: agross@...nel.org, robh+dt@...nel.org, lgirdwood@...il.com,
broonie@...nel.org, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
phone-devel@...r.kernel.org, konrad.dybcio@...ainline.org,
marijn.suijten@...ainline.org, jami.kettunen@...ainline.org,
paul.bouchara@...ainline.org, martin.botka@...ainline.org,
~postmarketos/upstreaming@...ts.sr.ht, jeffrey.l.hugo@...il.com,
robh@...nel.org
Subject: Re: [PATCH v7 2/6] dt-bindings: avs: cpr: Convert binding to YAML
schema
On Wed 01 Sep 10:57 CDT 2021, AngeloGioacchino Del Regno wrote:
> Convert the qcom,cpr.txt document to YAML schema and place it in the
> appropriate directory, since this driver was moved from power/avs
> to soc/qcom, but forgets to move the documentation.
>
> Fixes: a7305e684fcf ("PM: AVS: qcom-cpr: Move the driver to the qcom specific drivers")
I don't see it to be a requirement that the DT binding structure follows
the Linux implementation structure, so I think it's appropriate to keep
it in power/avs and I don't think it deserves a fixes.
I would like to merge this series, could you please address Rob's
concerns on the binding?
PS. If you did the YAML-ification as the last step I would have merged
the other 5 patches...
Thanks,
Bjorn
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
> ---
> .../bindings/power/avs/qcom,cpr.txt | 131 +-------------
> .../bindings/soc/qcom/qcom,cpr.yaml | 167 ++++++++++++++++++
> MAINTAINERS | 2 +-
> 3 files changed, 169 insertions(+), 131 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,cpr.yaml
>
> diff --git a/Documentation/devicetree/bindings/power/avs/qcom,cpr.txt b/Documentation/devicetree/bindings/power/avs/qcom,cpr.txt
> index ab0d5ebbad4e..2ada8cd08949 100644
> --- a/Documentation/devicetree/bindings/power/avs/qcom,cpr.txt
> +++ b/Documentation/devicetree/bindings/power/avs/qcom,cpr.txt
> @@ -1,130 +1 @@
> -QCOM CPR (Core Power Reduction)
> -
> -CPR (Core Power Reduction) is a technology to reduce core power on a CPU
> -or other device. Each OPP of a device corresponds to a "corner" that has
> -a range of valid voltages for a particular frequency. While the device is
> -running at a particular frequency, CPR monitors dynamic factors such as
> -temperature, etc. and suggests adjustments to the voltage to save power
> -and meet silicon characteristic requirements.
> -
> -- compatible:
> - Usage: required
> - Value type: <string>
> - Definition: should be "qcom,qcs404-cpr", "qcom,cpr" for qcs404
> -
> -- reg:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: base address and size of the rbcpr register region
> -
> -- interrupts:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: should specify the CPR interrupt
> -
> -- clocks:
> - Usage: required
> - Value type: <prop-encoded-array>
> - Definition: phandle to the reference clock
> -
> -- clock-names:
> - Usage: required
> - Value type: <stringlist>
> - Definition: must be "ref"
> -
> -- vdd-apc-supply:
> - Usage: required
> - Value type: <phandle>
> - Definition: phandle to the vdd-apc-supply regulator
> -
> -- #power-domain-cells:
> - Usage: required
> - Value type: <u32>
> - Definition: should be 0
> -
> -- operating-points-v2:
> - Usage: required
> - Value type: <phandle>
> - Definition: A phandle to the OPP table containing the
> - performance states supported by the CPR
> - power domain
> -
> -- acc-syscon:
> - Usage: optional
> - Value type: <phandle>
> - Definition: phandle to syscon for writing ACC settings
> -
> -- nvmem-cells:
> - Usage: required
> - Value type: <phandle>
> - Definition: phandle to nvmem cells containing the data
> - that makes up a fuse corner, for each fuse corner.
> - As well as the CPR fuse revision.
> -
> -- nvmem-cell-names:
> - Usage: required
> - Value type: <stringlist>
> - Definition: should be "cpr_quotient_offset1", "cpr_quotient_offset2",
> - "cpr_quotient_offset3", "cpr_init_voltage1",
> - "cpr_init_voltage2", "cpr_init_voltage3", "cpr_quotient1",
> - "cpr_quotient2", "cpr_quotient3", "cpr_ring_osc1",
> - "cpr_ring_osc2", "cpr_ring_osc3", "cpr_fuse_revision"
> - for qcs404.
> -
> -Example:
> -
> - cpr_opp_table: cpr-opp-table {
> - compatible = "operating-points-v2-qcom-level";
> -
> - cpr_opp1: opp1 {
> - opp-level = <1>;
> - qcom,opp-fuse-level = <1>;
> - };
> - cpr_opp2: opp2 {
> - opp-level = <2>;
> - qcom,opp-fuse-level = <2>;
> - };
> - cpr_opp3: opp3 {
> - opp-level = <3>;
> - qcom,opp-fuse-level = <3>;
> - };
> - };
> -
> - power-controller@...8000 {
> - compatible = "qcom,qcs404-cpr", "qcom,cpr";
> - reg = <0x0b018000 0x1000>;
> - interrupts = <0 15 IRQ_TYPE_EDGE_RISING>;
> - clocks = <&xo_board>;
> - clock-names = "ref";
> - vdd-apc-supply = <&pms405_s3>;
> - #power-domain-cells = <0>;
> - operating-points-v2 = <&cpr_opp_table>;
> - acc-syscon = <&tcsr>;
> -
> - nvmem-cells = <&cpr_efuse_quot_offset1>,
> - <&cpr_efuse_quot_offset2>,
> - <&cpr_efuse_quot_offset3>,
> - <&cpr_efuse_init_voltage1>,
> - <&cpr_efuse_init_voltage2>,
> - <&cpr_efuse_init_voltage3>,
> - <&cpr_efuse_quot1>,
> - <&cpr_efuse_quot2>,
> - <&cpr_efuse_quot3>,
> - <&cpr_efuse_ring1>,
> - <&cpr_efuse_ring2>,
> - <&cpr_efuse_ring3>,
> - <&cpr_efuse_revision>;
> - nvmem-cell-names = "cpr_quotient_offset1",
> - "cpr_quotient_offset2",
> - "cpr_quotient_offset3",
> - "cpr_init_voltage1",
> - "cpr_init_voltage2",
> - "cpr_init_voltage3",
> - "cpr_quotient1",
> - "cpr_quotient2",
> - "cpr_quotient3",
> - "cpr_ring_osc1",
> - "cpr_ring_osc2",
> - "cpr_ring_osc3",
> - "cpr_fuse_revision";
> - };
> +This file has been moved to ../../soc/qcom/qcom,cpr.yaml
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,cpr.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,cpr.yaml
> new file mode 100644
> index 000000000000..20f65427c762
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,cpr.yaml
> @@ -0,0 +1,167 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/soc/qcom/qcom,cpr.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm Core Power Reduction (CPR)
> +
> +description: |
> + CPR (Core Power Reduction) is a technology to reduce core power on a CPU
> + or other device. Each OPP of a device corresponds to a "corner" that has
> + a range of valid voltages for a particular frequency. While the device is
> + running at a particular frequency, CPR monitors dynamic factors such as
> + temperature, etc. and suggests adjustments to the voltage to save power
> + and meet silicon characteristic requirements.
> +
> +maintainers:
> + - Niklas Cassel <nks@...wful.org>
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - qcom,qcs404-cpr
> + - const: qcom,cpr
> +
> + reg:
> + description: Base address and size of the RBCPR register region
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: ref
> +
> + clocks:
> + items:
> + - description: CPR reference clock
> +
> + vdd-apc-supply:
> + description: Autonomous Phase Control (APC) power supply
> +
> + '#power-domain-cells':
> + const: 0
> +
> + acc-syscon:
> + description: phandle to syscon for writing ACC settings
> +
> + nvmem-cells:
> + minItems: 9
> + maxItems: 32
> + description: Cells containing the fuse corners and revision data
> +
> + nvmem-cell-names:
> + minItems: 9
> + maxItems: 32
> +
> + operating-points-v2: true
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clock-names
> + - clocks
> + - vdd-apc-supply
> + - "#power-domain-cells"
> + - nvmem-cells
> + - nvmem-cell-names
> + - operating-points-v2
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu@100 {
> + compatible = "arm,cortex-a53";
> + device_type = "cpu";
> + reg = <0x100>;
> + operating-points-v2 = <&cpu_opp_table>;
> + power-domains = <&cpr>;
> + power-domain-names = "cpr";
> + };
> + };
> +
> + cpu_opp_table: opp-table-cpu {
> + compatible = "operating-points-v2-kryo-cpu";
> + opp-shared;
> +
> + opp-1094400000 {
> + opp-hz = /bits/ 64 <1094400000>;
> + required-opps = <&cpr_opp1>;
> + };
> + opp-1248000000 {
> + opp-hz = /bits/ 64 <1248000000>;
> + required-opps = <&cpr_opp2>;
> + };
> + opp-1401600000 {
> + opp-hz = /bits/ 64 <1401600000>;
> + required-opps = <&cpr_opp3>;
> + };
> + };
> +
> + cpr_opp_table: opp-table-cpr {
> + compatible = "operating-points-v2-qcom-level";
> +
> + cpr_opp1: opp1 {
> + opp-level = <1>;
> + qcom,opp-fuse-level = <1>;
> + };
> + cpr_opp2: opp2 {
> + opp-level = <2>;
> + qcom,opp-fuse-level = <2>;
> + };
> + cpr_opp3: opp3 {
> + opp-level = <3>;
> + qcom,opp-fuse-level = <3>;
> + };
> + };
> +
> + power-controller@...8000 {
> + compatible = "qcom,qcs404-cpr", "qcom,cpr";
> + reg = <0x0b018000 0x1000>;
> + interrupts = <0 15 IRQ_TYPE_EDGE_RISING>;
> + clocks = <&xo_board>;
> + clock-names = "ref";
> + vdd-apc-supply = <&pms405_s3>;
> + #power-domain-cells = <0>;
> + operating-points-v2 = <&cpr_opp_table>;
> + acc-syscon = <&tcsr>;
> +
> + nvmem-cells = <&cpr_efuse_quot_offset1>,
> + <&cpr_efuse_quot_offset2>,
> + <&cpr_efuse_quot_offset3>,
> + <&cpr_efuse_init_voltage1>,
> + <&cpr_efuse_init_voltage2>,
> + <&cpr_efuse_init_voltage3>,
> + <&cpr_efuse_quot1>,
> + <&cpr_efuse_quot2>,
> + <&cpr_efuse_quot3>,
> + <&cpr_efuse_ring1>,
> + <&cpr_efuse_ring2>,
> + <&cpr_efuse_ring3>,
> + <&cpr_efuse_revision>;
> + nvmem-cell-names = "cpr0_quotient_offset1",
> + "cpr0_quotient_offset2",
> + "cpr0_quotient_offset3",
> + "cpr0_init_voltage1",
> + "cpr0_init_voltage2",
> + "cpr0_init_voltage3",
> + "cpr0_quotient1",
> + "cpr0_quotient2",
> + "cpr0_quotient3",
> + "cpr0_ring_osc1",
> + "cpr0_ring_osc2",
> + "cpr0_ring_osc3",
> + "cpr_fuse_revision";
> + };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index f58dad1a1922..90f1db301fae 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15490,7 +15490,7 @@ M: Niklas Cassel <nks@...wful.org>
> L: linux-pm@...r.kernel.org
> L: linux-arm-msm@...r.kernel.org
> S: Maintained
> -F: Documentation/devicetree/bindings/power/avs/qcom,cpr.txt
> +F: Documentation/devicetree/bindings/soc/qcom/qcom,cpr.yaml
> F: drivers/soc/qcom/cpr.c
>
> QUALCOMM CPUFREQ DRIVER MSM8996/APQ8096
> --
> 2.32.0
>
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