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Message-ID: <20210210222657.GA2911555@robh.at.kernel.org>
Date: Wed, 10 Feb 2021 16:26:57 -0600
From: Rob Herring <robh@...nel.org>
To: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc: f.fainelli@...il.com, linux-kernel@...r.kernel.org,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
bcm-kernel-feedback-list@...adcom.com,
linux-rpi-kernel@...ts.infradead.org, phil@...pberrypi.com,
wahrenst@....net, linux-arm-kernel@...ts.infradead.org,
mripard@...nel.org, eric@...olt.net, devicetree@...r.kernel.org
Subject: Re: [RFC/PATCH v2 01/16] dt-bindings: soc: bcm: bcm2835-pm: Convert
bindings to DT schema
On Tue, Feb 09, 2021 at 01:58:57PM +0100, Nicolas Saenz Julienne wrote:
> This converts the brcm,bcm2835-pm bindings from text to proper schema.
>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> ---
> .../bindings/soc/bcm/brcm,bcm2835-pm.txt | 46 -----------
> .../bindings/soc/bcm/brcm,bcm2835-pm.yaml | 79 +++++++++++++++++++
> 2 files changed, 79 insertions(+), 46 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt
> create mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.yaml
>
> diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt
> deleted file mode 100644
> index 72ff033565e5..000000000000
> --- a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.txt
> +++ /dev/null
> @@ -1,46 +0,0 @@
> -BCM2835 PM (Power domains, watchdog)
> -
> -The PM block controls power domains and some reset lines, and includes
> -a watchdog timer. This binding supersedes the brcm,bcm2835-pm-wdt
> -binding which covered some of PM's register range and functionality.
> -
> -Required properties:
> -
> -- compatible: Should be "brcm,bcm2835-pm"
> -- reg: Specifies base physical address and size of the two
> - register ranges ("PM" and "ASYNC_BRIDGE" in that
> - order)
> -- clocks: a) v3d: The V3D clock from CPRMAN
> - b) peri_image: The PERI_IMAGE clock from CPRMAN
> - c) h264: The H264 clock from CPRMAN
> - d) isp: The ISP clock from CPRMAN
> -- #reset-cells: Should be 1. This property follows the reset controller
> - bindings[1].
> -- #power-domain-cells: Should be 1. This property follows the power domain
> - bindings[2].
> -
> -Optional properties:
> -
> -- timeout-sec: Contains the watchdog timeout in seconds
> -- system-power-controller: Whether the watchdog is controlling the
> - system power. This node follows the power controller bindings[3].
> -
> -[1] Documentation/devicetree/bindings/reset/reset.txt
> -[2] Documentation/devicetree/bindings/power/power-domain.yaml
> -[3] Documentation/devicetree/bindings/power/power-controller.txt
> -
> -Example:
> -
> -pm {
> - compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt";
> - #power-domain-cells = <1>;
> - #reset-cells = <1>;
> - reg = <0x7e100000 0x114>,
> - <0x7e00a000 0x24>;
> - clocks = <&clocks BCM2835_CLOCK_V3D>,
> - <&clocks BCM2835_CLOCK_PERI_IMAGE>,
> - <&clocks BCM2835_CLOCK_H264>,
> - <&clocks BCM2835_CLOCK_ISP>;
> - clock-names = "v3d", "peri_image", "h264", "isp";
> - system-power-controller;
> -};
> diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.yaml b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.yaml
> new file mode 100644
> index 000000000000..8bc65e5f62a7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm2835-pm.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/soc/bcm/brcm,bcm2835-pm.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: BCM2835 PM (Power domains, watchdog)
> +
> +description: |
> + The PM block controls power domains and some reset lines, and includes a
> + watchdog timer.
> +
> +maintainers:
> + - Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> +
> +allOf:
> + - $ref: ../../watchdog/watchdog.yaml#
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - brcm,bcm2835-pm
> + - const: brcm,bcm2835-pm-wdt
Odd...
> +
> + reg:
> + minItems: 1
> + maxItems: 2
> + description: Specifies base physical address and size of the two register
> + ranges, "PM" and "ASYNC_BRIDGE" in that order.
The number, what they are and order are captured with:
items:
- description: PM registers
- description: ASYNC_BRIDGE registers
'Specifies base physical address and size' is every 'reg'.
> +
> + "#power-domain-cells":
> + const: 1
> +
> + "#reset-cells":
> + const: 1
> +
> + clocks:
> + minItems: 4
> + maxItems: 4
> +
> + clock-names:
> + items:
> + - const: v3d
> + - const: peri_image
> + - const: h264
> + - const: isp
> +
> + system-power-controller:
> + type: boolean
> +
> + timeout-sec: true
> +
> +required:
> + - compatible
> + - reg
> + - "#power-domain-cells"
> + - "#reset-cells"
> + - clocks
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/bcm2835.h>
> +
> + watchdog@...00000 {
> + compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt";
> + #power-domain-cells = <1>;
> + #reset-cells = <1>;
> + reg = <0x7e100000 0x114>,
> + <0x7e00a000 0x24>;
> + clocks = <&clocks BCM2835_CLOCK_V3D>,
> + <&clocks BCM2835_CLOCK_PERI_IMAGE>,
> + <&clocks BCM2835_CLOCK_H264>,
> + <&clocks BCM2835_CLOCK_ISP>;
> + clock-names = "v3d", "peri_image", "h264", "isp";
> + system-power-controller;
> + };
> --
> 2.30.0
>
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