[18/21] dt-bindings: serial: adi,uart4: add adi,uart4 driver documentation

From: Arturs Artamonovs <arturs.artamonovs@analog.com>

Add serial driver bindings.

Signed-off-by: Arturs Artamonovs <Arturs.Artamonovs@analog.com>
Signed-off-by: Utsav Agarwal <Utsav.Agarwal@analog.com>
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
---
 .../devicetree/bindings/serial/adi,uart.yaml       | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)

On Thu, 12 Sep 2024 19:25:03 +0100, Arturs Artamonovs wrote:
> Add serial driver bindings.
> 
> Signed-off-by: Arturs Artamonovs <Arturs.Artamonovs@analog.com>
> Signed-off-by: Utsav Agarwal <Utsav.Agarwal@analog.com>
> Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
> Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
> Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
> Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
> ---
>  .../devicetree/bindings/serial/adi,uart.yaml       | 85 ++++++++++++++++++++++
>  1 file changed, 85 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/serial/adi,uart.yaml: $id: Cannot determine base path from $id, relative path/filename doesn't match actual path or filename
 	 $id: http://devicetree.org/schemas/serial/adi,uart4.yaml
 	file: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/serial/adi,uart.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20240912-test-v1-18-458fa57c8ccf@analog.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

On Thu, Sep 12, 2024 at 07:25:03PM +0100, Arturs Artamonovs wrote:
> Add serial driver bindings.

Don''t need 'documentation' in the the subject. That's redundant with 
'dt-bindings'.


> 
> Signed-off-by: Arturs Artamonovs <Arturs.Artamonovs@analog.com>

Your S-o-b goes last since you are sending the patch.

> Signed-off-by: Utsav Agarwal <Utsav.Agarwal@analog.com>

Not clear what Utsav's role was. Needs Co-developed-by?

> Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
> Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
> Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
> Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
> ---
>  .../devicetree/bindings/serial/adi,uart.yaml       | 85 ++++++++++++++++++++++
>  1 file changed, 85 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/serial/adi,uart.yaml b/Documentation/devicetree/bindings/serial/adi,uart.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..de58059efa7e21acaa5b7f4984ffadca18f7f53a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/adi,uart.yaml
> @@ -0,0 +1,85 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/adi,uart4.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices UART Driver for SC5XX-family processors

Bindings aren't a driver.

> +
> +maintainers:
> +  - Arturs Artamonovs <arturs.artamonovs@analog.com>
> +  - Utsav Agarwal <Utsav.Agarwal@analog.com>
> +
> +description: |

Don't need '|'.

> +  Analog Devices UART Driver for SC59X-family processors
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,uart

Only 1 UART implementation for all of Analog Devices ever.

compatibles should be specific to SoC.

> +
> +  reg:
> +    maxItems: 1
> +
> +  dmas:
> +    maxItems: 2
> +    minItems: 2
> +    description: TX and RX DMA cluster numbers
> +
> +  dma-names:
> +    maxItems: 2
> +    minItems: 2
> +    description: DMA channel names (tx and rx)

Names need to be constraints, not freeform text. Plenty of examples to 
look at...

> +
> +  clocks:
> +    maxItems: 1
> +    description: Clock being used for UART

That's obvious. Drop description or say something unique to this device.

> +
> +  clock-names:
> +    maxItems: 1
> +    description: Clock name (sclk0)
> +
> +  interrupt-names:
> +    minItems: 3
> +    maxItems: 3
> +    description: Interrupt names (tx + rx + status)
> +
> +  interrupts:
> +    minItems: 3
> +    maxItems: 3
> +    description: GIC interrupt numbers
> +
> +  adi,use-edbo:
> +    type: boolean
> +    description: Enable divide by one in divisor

Versus divide by ???

> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupt-names
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/adi-sc5xx-clock.h>
> +
> +    uart0: uart@31003000 {

serial@...

Drop unused labels.

> +      compatible = "adi,uart";
> +      reg = <0x31003000 0x40>;
> +      clocks = <&clk ADSP_SC598_CLK_CGU0_SCLK0>;
> +      clock-names = "sclk0";
> +      interrupt-parent = <&gic>;
> +      interrupt-names = "tx", "rx", "status";
> +      interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
> +      adi,use-edbo;
> +      status = "disabled";

Examples should be enabled. Drop.

> +    };
> +
> 
> -- 
> 2.25.1
>