Re: [PATCH v4 1/5] dt-bindings: Convert ahci-platform DT bindings to yaml

From: Rob Herring
Date: Wed Mar 02 2022 - 13:15:40 EST

On Tue, Mar 01, 2022 at 04:24:17PM +0100, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
>
> Create a yaml file for dtbs_check from the old txt binding.
>
> Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
> ---
> v4:
> - fix min vs. max
> - fix indention of examples
> - move up sata-common.yaml
> - reorder compatible
> - add descriptions/maxitems
> - fix compatible-structure
> - fix typo in example achi vs. ahci
> - add clock-names and reg-names
> - fix ns2 errors in separate patch
> v3:
> - add conversion to sata-series
> - fix some errors in dt_binding_check and dtbs_check
> - move to unevaluated properties = false
>
> ---
>
> imho all errors should be fixed in the dts not in the yaml...
>
> errors about the subitem requirement that was defined in txt but not fixed some marvell dts
>
> some dts for Marvell SoC bring error
> 'phys' is a required property
> 'target-supply' is a required property
>
> problem is in arch/arm64/boot/dts/marvell/armada-cp11x.dtsi:331
> here the sata-port@0 is defined, but not overridden with phy/target-supply in any following dts
> ---
> .../devicetree/bindings/ata/ahci-platform.txt | 79 ---------
> .../bindings/ata/ahci-platform.yaml | 162 ++++++++++++++++++
> 2 files changed, 162 insertions(+), 79 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/ata/ahci-platform.txt
> create mode 100644 Documentation/devicetree/bindings/ata/ahci-platform.yaml
>
> diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
> deleted file mode 100644
> index 77091a277642..000000000000
> --- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
> +++ /dev/null
> @@ -1,79 +0,0 @@
> -* AHCI SATA Controller
> -
> -SATA nodes are defined to describe on-chip Serial ATA controllers.
> -Each SATA controller should have its own node.
> -
> -It is possible, but not required, to represent each port as a sub-node.
> -It allows to enable each port independently when dealing with multiple
> -PHYs.
> -
> -Required properties:
> -- compatible : compatible string, one of:
> - - "brcm,iproc-ahci"
> - - "hisilicon,hisi-ahci"
> - - "cavium,octeon-7130-ahci"
> - - "ibm,476gtr-ahci"
> - - "marvell,armada-380-ahci"
> - - "marvell,armada-3700-ahci"
> - - "snps,dwc-ahci"
> - - "snps,spear-ahci"
> - - "generic-ahci"
> -- interrupts : <interrupt mapping for SATA IRQ>
> -- reg : <registers mapping>
> -
> -Please note that when using "generic-ahci" you must also specify a SoC specific
> -compatible:
> - compatible = "manufacturer,soc-model-ahci", "generic-ahci";
> -
> -Optional properties:
> -- dma-coherent : Present if dma operations are coherent
> -- clocks : a list of phandle + clock specifier pairs
> -- resets : a list of phandle + reset specifier pairs
> -- target-supply : regulator for SATA target power
> -- phy-supply : regulator for PHY power
> -- phys : reference to the SATA PHY node
> -- phy-names : must be "sata-phy"
> -- ahci-supply : regulator for AHCI controller
> -- ports-implemented : Mask that indicates which ports that the HBA supports
> - are available for software to use. Useful if PORTS_IMPL
> - is not programmed by the BIOS, which is true with
> - some embedded SOC's.
> -
> -Required properties when using sub-nodes:
> -- #address-cells : number of cells to encode an address
> -- #size-cells : number of cells representing the size of an address
> -
> -Sub-nodes required properties:
> -- reg : the port number
> -And at least one of the following properties:
> -- phys : reference to the SATA PHY node
> -- target-supply : regulator for SATA target power
> -
> -Examples:
> - sata@ffe08000 {
> - compatible = "snps,spear-ahci";
> - reg = <0xffe08000 0x1000>;
> - interrupts = <115>;
> - };
> -
> -With sub-nodes:
> - sata@f7e90000 {
> - compatible = "marvell,berlin2q-achi", "generic-ahci";
> - reg = <0xe90000 0x1000>;
> - interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> - clocks = <&chip CLKID_SATA>;
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - sata0: sata-port@0 {
> - reg = <0>;
> - phys = <&sata_phy 0>;
> - target-supply = <&reg_sata0>;
> - };
> -
> - sata1: sata-port@1 {
> - reg = <1>;
> - phys = <&sata_phy 1>;
> - target-supply = <&reg_sata1>;;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.yaml b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
> new file mode 100644
> index 000000000000..cf67ddfc6afb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
> @@ -0,0 +1,162 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ata/ahci-platform.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AHCI SATA Controller

blank line.

> +description:
> + SATA nodes are defined to describe on-chip Serial ATA controllers.
> + Each SATA controller should have its own node.
> +
> + It is possible, but not required, to represent each port as a sub-node.
> + It allows to enable each port independently when dealing with multiple
> + PHYs.

You need a '|' after 'description' if you want to maintain the
paragraphs.

> +
> +maintainers:
> + - Hans de Goede <hdegoede@xxxxxxxxxx>
> + - Jens Axboe <axboe@xxxxxxxxx>
> +
> +allOf:
> +- $ref: "sata-common.yaml#"
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - brcm,iproc-ahci
> + - marvell,armada-8k-ahci
> + - marvell,berlin2q-ahci
> + - const: generic-ahci
> + - enum:
> + - brcm,iproc-ahci
> + - cavium,octeon-7130-ahci
> + - hisilicon,hisi-ahci
> + - ibm,476gtr-ahci
> + - marvell,armada-3700-ahci
> + - marvell,armada-380-ahci
> + - snps,dwc-ahci
> + - snps,spear-ahci

Install yamllint and run 'make dt_binding_check'. It's going to
complain about the indentation.

> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + description:
> + Clock IDs array as required by the controller.
> + minItems: 1
> + maxItems: 3
> +
> + interrupts:
> + description:
> + specifies the interrupt number for the controller.
> + maxItems: 1
> +
> + ahci-supply:
> + description:
> + regulator for AHCI controller
> +
> + clock-names:

Group with 'clocks'

> + description:
> + Names of clocks corresponding to IDs in the clock property.
> + minItems: 1
> + maxItems: 3
> +
> + dma-coherent:
> + true
> +
> + phy-supply:
> + description:
> + regulator for PHY power
> +
> + phys:
> + description:
> + List of all PHYs on this controller
> + maxItems: 1
> +
> + phy-names:
> + description:
> + Name specifier for the PHYs
> + maxItems: 1
> +
> + ports-implemented:
> + $ref: '/schemas/types.yaml#/definitions/uint32'
> + description:
> + Mask that indicates which ports that the HBA supports
> + are available for software to use. Useful if PORTS_IMPL
> + is not programmed by the BIOS, which is true with
> + some embedded SoCs.
> + maxItems: 1

A uint32 is only ever 1 item. Drop.

IIRC, isn't the max here 0xff? Add constraints.

> +
> + reg-names:
> + maxItems: 1

Group with 'reg'.

> +
> + resets:
> + maxItems: 1
> +
> + target-supply:
> + description:
> + regulator for SATA target power
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> +
> +patternProperties:
> + "^sata-port@[0-9a-f]+$":
> + type: object

additionalProperties: false

> + description:
> + Subnode with configuration of the Ports.
> +
> + properties:
> + reg:
> + maxItems: 1
> +
> + phys:
> + minItems: 1
> +
> + target-supply:
> + description:
> + regulator for SATA target power
> +
> + required:
> + - reg
> +
> + anyOf:
> + - required: [ phys ]
> + - required: [ target-supply ]
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + sata@ffe08000 {
> + compatible = "snps,spear-ahci";
> + reg = <0xffe08000 0x1000>;
> + interrupts = <115>;
> + };
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/clock/berlin2q.h>
> + sata@f7e90000 {
> + compatible = "marvell,berlin2q-ahci", "generic-ahci";
> + reg = <0xe90000 0x1000>;
> + interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&chip CLKID_SATA>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + sata0: sata-port@0 {
> + reg = <0>;
> + phys = <&sata_phy 0>;
> + target-supply = <&reg_sata0>;
> + };
> +
> + sata1: sata-port@1 {
> + reg = <1>;
> + phys = <&sata_phy 1>;
> + target-supply = <&reg_sata1>;
> + };
> + };
> --
> 2.25.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel