linux-kernel - Re: [PATCH 1/1] dt-bindings: soc: fsl: Convert rcpm to yaml format

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Message-ID: <20240730194332.GA2029820-robh@kernel.org>
Date: Tue, 30 Jul 2024 13:43:32 -0600
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	"open list:REAL TIME CLOCK (RTC) SUBSYSTEM" <linux-rtc@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:FREESCALE SOC DRIVERS" <linuxppc-dev@...ts.ozlabs.org>,
	"moderated list:FREESCALE SOC DRIVERS" <linux-arm-kernel@...ts.infradead.org>,
	imx@...ts.linux.dev
Subject: Re: [PATCH 1/1] dt-bindings: soc: fsl: Convert rcpm to yaml format

On Mon, Jul 29, 2024 at 03:11:42PM -0400, Frank Li wrote:
> Convert dt-binding rcpm from txt to yaml format.
> Add fsl,ls1028a-rcpm compatible string.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  .../bindings/rtc/fsl,ls-ftm-alarm.yaml        |  2 +-
>  .../devicetree/bindings/soc/fsl/fsl,rcpm.yaml | 91 +++++++++++++++++++
>  .../devicetree/bindings/soc/fsl/rcpm.txt      | 69 --------------
>  3 files changed, 92 insertions(+), 70 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/soc/fsl/fsl,rcpm.yaml
>  delete mode 100644 Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> 
> diff --git a/Documentation/devicetree/bindings/rtc/fsl,ls-ftm-alarm.yaml b/Documentation/devicetree/bindings/rtc/fsl,ls-ftm-alarm.yaml
> index 388102ae30cd8..3ec111f2fdc40 100644
> --- a/Documentation/devicetree/bindings/rtc/fsl,ls-ftm-alarm.yaml
> +++ b/Documentation/devicetree/bindings/rtc/fsl,ls-ftm-alarm.yaml
> @@ -42,7 +42,7 @@ properties:
>          minItems: 1
>      description:
>        phandle to rcpm node, Please refer
> -      Documentation/devicetree/bindings/soc/fsl/rcpm.txt
> +      Documentation/devicetree/bindings/soc/fsl/fsl,rcpm.yaml
>  
>    big-endian:
>      $ref: /schemas/types.yaml#/definitions/flag
> diff --git a/Documentation/devicetree/bindings/soc/fsl/fsl,rcpm.yaml b/Documentation/devicetree/bindings/soc/fsl/fsl,rcpm.yaml
> new file mode 100644
> index 0000000000000..6c6cda7f2b220
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/fsl/fsl,rcpm.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/fsl/fsl,rcpm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Run Control and Power Management
> +
> +description:
> +  The RCPM performs all device-level tasks associated with device run control
> +  and power management.
> +
> +maintainers:
> +  - Frank Li <Frank.Li@....com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - fsl,ls1012a-rcpm
> +          - fsl,ls1021a-rcpm
> +          - fsl,ls1028a-rcpm
> +          - fsl,ls1043a-rcpm
> +          - fsl,ls1045a-rcpm
> +          - fsl,p2041-rcpm
> +          - fsl,p5020-rcpm
> +          - fsl,t4240-rcpm
> +      - enum:
> +          - fsl,qoriq-rcpm-1.0
> +          - fsl,qoriq-rcpm-2.0
> +          - fsl,qoriq-rcpm-2.1
> +          - fsl,qoriq-rcpm-2.1+

You can't just allow any combination.

> +    minItems: 1
> +    description: |
> +      All references to "1.0" and "2.0" refer to the QorIQ chassis version to
> +      which the chip complies.
> +      Chassis Version         Example Chips
> +      ---------------         -------------------------------
> +      1.0                     p4080, p5020, p5040, p2041, p3041
> +      2.0                     t4240, b4860, b4420
> +      2.1                     t1040,
> +      2.1+                    ls1021a, ls1012a, ls1043a, ls1046a

The compatible lists above needs to match this.

> +
> +  reg:
> +    maxItems: 1
> +
> +  "#fsl,rcpm-wakeup-cells":
> +    description: |
> +      The number of IPPDEXPCR register cells in the
> +      fsl,rcpm-wakeup property.
> +
> +      Freescale RCPM Wakeup Source Device Tree Bindings
> +
> +      Required fsl,rcpm-wakeup property should be added to a device node if
> +      the device can be used as a wakeup source.
> +
> +      fsl,rcpm-wakeup: Consists of a phandle to the rcpm node and the IPPDEXPCR
> +      register cells. The number of IPPDEXPCR register cells is defined in
> +      "#fsl,rcpm-wakeup-cells" in the rcpm node. The first register cell is
> +      the bit mask that should be set in IPPDEXPCR0, and the second register
> +      cell is for IPPDEXPCR1, and so on.
> +
> +      Note: IPPDEXPCR(IP Powerdown Exception Control Register) provides a
> +      mechanism for keeping certain blocks awake during STANDBY and MEM, in
> +      order to use them as wake-up sources.
> +
> +  little-endian:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      RCPM register block is Little Endian. Without it RCPM
> +      will be Big Endian (default case).
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    rcpm: global-utilities@...00 {
> +          compatible = "fsl,t4240-rcpm", "fsl,qoriq-rcpm-2.0";
> +          reg = <0xe2000 0x1000>;
> +          #fsl,rcpm-wakeup-cells = <2>;
> +    };
> +
> +    serial@...0000 {
> +         compatible = "fsl,ls1021a-lpuart";
> +         reg = <0x2950000 0x1000>;
> +         interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
> +         clocks = <&sysclk>;
> +         clock-names = "ipg";
> +         fsl,rcpm-wakeup = <&rcpm 0x0 0x40000000>;
> +    };