Re: [PATCH v1 3/7] dt-bindings: devfreq: tegra30-actmon: Convert to schema

[Thierry Reding]

On Tue, May 11, 2021 at 12:10:04AM +0300, Dmitry Osipenko wrote:
> Convert NVIDIA Tegra ACTMON binding to schema.
> 
> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
> ---
>  .../arm/tegra/nvidia,tegra30-actmon.txt       |  57 ---------
>  .../devfreq/nvidia,tegra30-actmon.yaml        | 121 ++++++++++++++++++
>  2 files changed, 121 insertions(+), 57 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-actmon.txt
>  create mode 100644 Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
> 
> diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-actmon.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-actmon.txt
> deleted file mode 100644
> index 897eedfa2bc8..000000000000
> --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-actmon.txt
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -NVIDIA Tegra Activity Monitor
> -
> -The activity monitor block collects statistics about the behaviour of other
> -components in the system. This information can be used to derive the rate at
> -which the external memory needs to be clocked in order to serve all requests
> -from the monitored clients.
> -
> -Required properties:
> -- compatible: should be "nvidia,tegra<chip>-actmon"
> -- reg: offset and length of the register set for the device
> -- interrupts: standard interrupt property
> -- clocks: Must contain a phandle and clock specifier pair for each entry in
> -clock-names. See ../../clock/clock-bindings.txt for details.
> -- clock-names: Must include the following entries:
> -  - actmon
> -  - emc
> -- resets: Must contain an entry for each entry in reset-names. See
> -../../reset/reset.txt for details.
> -- reset-names: Must include the following entries:
> -  - actmon
> -- operating-points-v2: See ../bindings/opp/opp.txt for details.
> -- interconnects: Should contain entries for memory clients sitting on
> -                 MC->EMC memory interconnect path.
> -- interconnect-names: Should include name of the interconnect path for each
> -                      interconnect entry. Consult TRM documentation for
> -                      information about available memory clients, see MEMORY
> -                      CONTROLLER section.
> -
> -For each opp entry in 'operating-points-v2' table:
> -- opp-supported-hw: bitfield indicating SoC speedo ID mask
> -- opp-peak-kBps: peak bandwidth of the memory channel
> -
> -Example:
> -	dfs_opp_table: opp-table {
> -		compatible = "operating-points-v2";
> -
> -		opp@12750000 {
> -			opp-hz = /bits/ 64 <12750000>;
> -			opp-supported-hw = <0x000F>;
> -			opp-peak-kBps = <51000>;
> -		};
> -		...
> -	};
> -
> -	actmon@6000c800 {
> -		compatible = "nvidia,tegra124-actmon";
> -		reg = <0x0 0x6000c800 0x0 0x400>;
> -		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&tegra_car TEGRA124_CLK_ACTMON>,
> -			 <&tegra_car TEGRA124_CLK_EMC>;
> -		clock-names = "actmon", "emc";
> -		resets = <&tegra_car 119>;
> -		reset-names = "actmon";
> -		operating-points-v2 = <&dfs_opp_table>;
> -		interconnects = <&mc TEGRA124_MC_MPCORER &emc>;
> -		interconnect-names = "cpu";
> -	};
> diff --git a/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml b/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
> new file mode 100644
> index 000000000000..2a940d5d7ab4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/devfreq/nvidia,tegra30-actmon.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NVIDIA Tegra30 Activity Monitor
> +
> +maintainers:
> +  - Dmitry Osipenko <digetx@xxxxxxxxx>
> +  - Jon Hunter <jonathanh@xxxxxxxxxx>
> +  - Thierry Reding <thierry.reding@xxxxxxxxx>
> +
> +description: |
> +  The activity monitor block collects statistics about the behaviour of other
> +  components in the system. This information can be used to derive the rate at
> +  which the external memory needs to be clocked in order to serve all requests
> +  from the monitored clients.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nvidia,tegra30-actmon
> +      - nvidia,tegra114-actmon
> +      - nvidia,tegra124-actmon
> +      - nvidia,tegra210-actmon
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 2
> +
> +  clock-names:
> +    items:
> +      - const: actmon
> +      - const: emc
> +
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    items:
> +      - const: actmon
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interconnects:
> +    minItems: 1
> +    maxItems: 12
> +
> +  interconnect-names:
> +    minItems: 1
> +    maxItems: 12
> +    description:
> +      Should include name of the interconnect path for each interconnect
> +      entry. Consult TRM documentation for information about available
> +      memory clients, see ACTIVITY MONITOR section.

This used to be "see MEMORY CONTROLLER section", so I looked at the TRM
to see if this was perhaps a fix for an earlier typo, but looking at the
TRM (v3) I can't find a section named "ACTIVITY MONITOR".

Should this be changed back to "MEMORY CONTROLLER"?

Thierry

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