From: Ulrich Hecht <uli@fpond.eu>
To: Simon Horman <horms+renesas@verge.net.au>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Magnus Damm <magnus.damm@gmail.com>,
Yoshihiro Kaneko <ykaneko0929@gmail.com>,
devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: bus: simple-pm-bus: convert bindings to json-schema
Date: Tue, 17 Sep 2019 12:43:27 +0200 (CEST) [thread overview]
Message-ID: <2123403900.237308.1568717007831@webmail.strato.com> (raw)
In-Reply-To: <20190916153357.3880-2-horms+renesas@verge.net.au>
> On September 16, 2019 at 5:33 PM Simon Horman <horms+renesas@verge.net.au> wrote:
>
>
> Convert Simple Power-Managed Bus bindings documentation to json-schema.
>
> As a side effect of this change only simple-pm-bus is used in example. A
> follow-up patch will provide an example for the separately documented
> Renesas Bus State Controller (BSC) that uses "renesas,bsc-sh73a0" and
> "renesas,bsc" compat strings.
>
> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> ---
> * Tested using:
> # ARCH=arm64 make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
> # ARCH=arm make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
> ---
> .../devicetree/bindings/bus/simple-pm-bus.txt | 44 --------------
> .../devicetree/bindings/bus/simple-pm-bus.yaml | 68 ++++++++++++++++++++++
> 2 files changed, 68 insertions(+), 44 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/bus/simple-pm-bus.txt
> create mode 100644 Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
>
> diff --git a/Documentation/devicetree/bindings/bus/simple-pm-bus.txt b/Documentation/devicetree/bindings/bus/simple-pm-bus.txt
> deleted file mode 100644
> index 6f15037131ed..000000000000
> --- a/Documentation/devicetree/bindings/bus/simple-pm-bus.txt
> +++ /dev/null
> @@ -1,44 +0,0 @@
> -Simple Power-Managed Bus
> -========================
> -
> -A Simple Power-Managed Bus is a transparent bus that doesn't need a real
> -driver, as it's typically initialized by the boot loader.
> -
> -However, its bus controller is part of a PM domain, or under the control of a
> -functional clock. Hence, the bus controller's PM domain and/or clock must be
> -enabled for child devices connected to the bus (either on-SoC or externally)
> -to function.
> -
> -While "simple-pm-bus" follows the "simple-bus" set of properties, as specified
> -in the Devicetree Specification, it is not an extension of "simple-bus".
> -
> -
> -Required properties:
> - - compatible: Must contain at least "simple-pm-bus".
> - Must not contain "simple-bus".
> - It's recommended to let this be preceded by one or more
> - vendor-specific compatible values.
> - - #address-cells, #size-cells, ranges: Must describe the mapping between
> - parent address and child address spaces.
> -
> -Optional platform-specific properties for clock or PM domain control (at least
> -one of them is required):
> - - clocks: Must contain a reference to the functional clock(s),
> - - power-domains: Must contain a reference to the PM domain.
> -Please refer to the binding documentation for the clock and/or PM domain
> -providers for more details.
> -
> -
> -Example:
> -
> - bsc: bus@fec10000 {
> - compatible = "renesas,bsc-sh73a0", "renesas,bsc",
> - "simple-pm-bus";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - ranges = <0 0 0x20000000>;
> - reg = <0xfec10000 0x400>;
> - interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
> - clocks = <&zb_clk>;
> - power-domains = <&pd_a4s>;
> - };
> diff --git a/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
> new file mode 100644
> index 000000000000..72a3644974e3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/simple-pm-bus.yaml
> @@ -0,0 +1,68 @@
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/simple-pm-bus.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Simple Power-Managed Bus
> +
> +maintainers:
> + - Geert Uytterhoeven <geert+renesas@glider.be>
> +
> +description: |
> + A Simple Power-Managed Bus is a transparent bus that doesn't need a real
> + driver, as it's typically initialized by the boot loader.
> +
> + However, its bus controller is part of a PM domain, or under the control
> + of a functional clock. Hence, the bus controller's PM domain and/or
> + clock must be enabled for child devices connected to the bus (either
> + on-SoC or externally) to function.
> +
> + While "simple-pm-bus" follows the "simple-bus" set of properties, as
> + specified in the Devicetree Specification, it is not an extension of
> + "simple-bus".
> +
> +
> +properties:
> + compatible:
> + items:
> + - const: simple-pm-bus
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 1
> +
> + ranges:
> + # Mapping between parent address and child address spaces.
> + maxItems: 1
> +
> + clocks:
> + # Functional clocks
> + # Required if power-domains is absent, optional otherwise
> + minItems: 1
> +
> + power-domains:
> + # Required if clocks is absent, optional otherwise
> + minItems: 1
> +
> +required:
> + - compatible
> + - '#address-cells'
> + - '#size-cells'
> + - ranges
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + bsc: bus@fec10000 {
> + compatible = "simple-pm-bus";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0 0 0x20000000>;
> + reg = <0xfec10000 0x400>;
> + interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&zb_clk>;
> + power-domains = <&pd_a4s>;
> + };
> --
> 2.11.0
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
CU
Uli
>
next prev parent reply other threads:[~2019-09-17 10:49 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 15:33 [PATCH 0/2] dt-bindings: bus: simple-pm-bus, renesas-bsc: convert bindings to json-schema Simon Horman
2019-09-16 15:33 ` [PATCH 1/2] dt-bindings: bus: simple-pm-bus: " Simon Horman
2019-09-17 10:43 ` Ulrich Hecht [this message]
2019-09-17 11:29 ` Simon Horman
2019-09-17 12:48 ` Rob Herring
2019-09-19 14:59 ` Simon Horman
2019-09-17 12:12 ` Rob Herring
2019-09-17 12:44 ` Geert Uytterhoeven
2019-09-19 15:10 ` Simon Horman
2019-09-19 19:33 ` Rob Herring
2019-09-23 11:53 ` Simon Horman
2019-09-23 12:40 ` Rob Herring
2019-09-24 9:22 ` Simon Horman
2019-09-16 15:33 ` [PATCH 2/2] dt-bindings: bus: renesas-bsc: " Simon Horman
2019-09-17 10:43 ` Ulrich Hecht
2019-09-17 11:08 ` Simon Horman
2019-09-17 12:41 ` Rob Herring
2019-09-17 11:09 ` Simon Horman
2019-09-17 11:12 ` Simon Horman
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