On Wed, Feb 26, 2020 at 06:08:54PM +0000, Andre Przywara wrote:
> Convert the Calxeda Highbank SATA controller binding to DT schema format
> using json-schema.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> Cc: Jens Axboe <axboe@kernel.dk>
> ---
>  .../devicetree/bindings/ata/sata_highbank.txt | 44 ---------
>  .../bindings/ata/sata_highbank.yaml           | 96 +++++++++++++++++++
>  2 files changed, 96 insertions(+), 44 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/ata/sata_highbank.txt
>  create mode 100644 Documentation/devicetree/bindings/ata/sata_highbank.yaml
>
> diff --git a/Documentation/devicetree/bindings/ata/sata_highbank.txt b/Documentation/devicetree/bindings/ata/sata_highbank.txt
> deleted file mode 100644
> index aa83407cb7a4..000000000000
> --- a/Documentation/devicetree/bindings/ata/sata_highbank.txt
> +++ /dev/null
> @@ -1,44 +0,0 @@
> -* Calxeda AHCI SATA Controller
> -
> -SATA nodes are defined to describe on-chip Serial ATA controllers.
> -The Calxeda SATA controller mostly conforms to the AHCI interface
> -with some special extensions to add functionality.
> -Each SATA controller should have its own node.
> -
> -Required properties:
> -- compatible        : compatible list, contains "calxeda,hb-ahci"
> -- interrupts        : <interrupt mapping for SATA IRQ>
> -- reg               : <registers mapping>
> -
> -Optional properties:
> -- dma-coherent      : Present if dma operations are coherent
> -- calxeda,port-phys : phandle-combophy and lane assignment, which maps each
> -			SATA port to a combophy and a lane within that
> -			combophy
> -- calxeda,sgpio-gpio: phandle-gpio bank, bit offset, and default on or off,
> -			which indicates that the driver supports SGPIO
> -			indicator lights using the indicated GPIOs
> -- calxeda,led-order : a u32 array that map port numbers to offsets within the
> -			SGPIO bitstream.
> -- calxeda,tx-atten  : a u32 array that contains TX attenuation override
> -			codes, one per port. The upper 3 bytes are always
> -			0 and thus ignored.
> -- calxeda,pre-clocks : a u32 that indicates the number of additional clock
> -			cycles to transmit before sending an SGPIO pattern
> -- calxeda,post-clocks: a u32 that indicates the number of additional clock
> -			cycles to transmit after sending an SGPIO pattern
> -
> -Example:
> -        sata@ffe08000 {
> -		compatible = "calxeda,hb-ahci";
> -		reg = <0xffe08000 0x1000>;
> -		interrupts = <115>;
> -		dma-coherent;
> -		calxeda,port-phys = <&combophy5 0 &combophy0 0 &combophy0 1
> -					&combophy0 2 &combophy0 3>;
> -		calxeda,sgpio-gpio =<&gpioh 5 1 &gpioh 6 1 &gpioh 7 1>;
> -		calxeda,led-order = <4 0 1 2 3>;
> -		calxeda,tx-atten = <0xff 22 0xff 0xff 23>;
> -		calxeda,pre-clocks = <10>;
> -		calxeda,post-clocks = <0>;
> -        };
> diff --git a/Documentation/devicetree/bindings/ata/sata_highbank.yaml b/Documentation/devicetree/bindings/ata/sata_highbank.yaml
> new file mode 100644
> index 000000000000..392a3efc9833
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ata/sata_highbank.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ata/sata_highbank.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Calxeda AHCI SATA Controller
> +
> +description: |
> +  The Calxeda SATA controller mostly conforms to the AHCI interface
> +  with some special extensions to add functionality, to map GPIOs for
> +  activity LEDs and for mapping the ComboPHYs.
> +
> +maintainers:
> +  - Andre Przywara <andre.przywara@arm.com>
> +
> +properties:
> +  compatible:
> +    const: calxeda,hb-ahci
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  dma-coherent: true
> +
> +  calxeda,pre-clocks:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: |
> +      Indicates the number of additional clock cycles to transmit before
> +      sending an SGPIO pattern.
> +
> +  calxeda,post-clocks:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: |
> +      Indicates the number of additional clock cycles to transmit after
> +      sending an SGPIO pattern.
> +
> +  calxeda,led-order:
> +    description: Maps port numbers to offsets within the SGPIO bitstream.
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32-array
> +      - minItems: 1
> +        maxItems: 8
> +
> +  calxeda,port-phys:
> +    description: |
> +      phandle-combophy and lane assignment, which maps each SATA port to a
> +      combophy and a lane within that combophy
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/phandle-array
> +      - minItems: 1
> +        maxItems: 8
> +
> +  calxeda,tx-atten:
> +    description: |
> +      Contains TX attenuation override codes, one per port.
> +      The upper 24 bits of each entry are always 0 and thus ignored.
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32-array
> +      - minItems: 1
> +        maxItems: 8
> +
> +  calxeda,sgpio-gpio:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: |
> +      phandle-gpio bank, bit offset, and default on or off, which indicates
> +      that the driver supports SGPIO indicator lights using the indicated
> +      GPIOs.

Ditto, this is being checked already:
https://github.com/devicetree-org/dt-schema/blob/master/schemas/gpio/gpio.yaml#L37