Re: [PATCH v2 2/2] dt-bindings: serial: Convert slave-device bindings to json-schema

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On 06/03/2020 10:00, Geert Uytterhoeven wrote:
> Convert the serial slave-device Device Tree binding documentation to
> json-schema, and incorporate it into the generic serial bindings.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Reviewed-by: Matthias Brugger <mbrugger@xxxxxxxx>

> ---
> v2:
>   - Update references to slave-device.txt,
>   - Allow any child node names,
>   - Typo s/connnected/connected/.
> ---
>  .../devicetree/bindings/gnss/gnss.txt         |  2 +-
>  .../bindings/net/broadcom-bluetooth.txt       |  2 +-
>  .../bindings/net/mediatek-bluetooth.txt       |  2 +-
>  .../devicetree/bindings/net/qca,qca7000.txt   |  2 +-
>  .../bindings/net/qualcomm-bluetooth.txt       |  2 +-
>  .../devicetree/bindings/net/ti-bluetooth.txt  |  3 +-
>  .../devicetree/bindings/serial/serial.yaml    | 56 +++++++++++++++++++
>  .../bindings/serial/slave-device.txt          | 45 ---------------
>  MAINTAINERS                                   |  2 +-
>  9 files changed, 63 insertions(+), 53 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/serial/slave-device.txt
> 
> diff --git a/Documentation/devicetree/bindings/gnss/gnss.txt b/Documentation/devicetree/bindings/gnss/gnss.txt
> index f547bd4549fe4655..d6dc9c0d82499dd5 100644
> --- a/Documentation/devicetree/bindings/gnss/gnss.txt
> +++ b/Documentation/devicetree/bindings/gnss/gnss.txt
> @@ -8,7 +8,7 @@ bus (e.g. UART, I2C or SPI).
>  
>  Please refer to the following documents for generic properties:
>  
> -	Documentation/devicetree/bindings/serial/slave-device.txt
> +	Documentation/devicetree/bindings/serial/serial.yaml
>  	Documentation/devicetree/bindings/spi/spi-bus.txt
>  
>  Required properties:
> diff --git a/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt b/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
> index dd258674633ca84e..a7d57ba5f2ac39bd 100644
> --- a/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
> +++ b/Documentation/devicetree/bindings/net/broadcom-bluetooth.txt
> @@ -20,7 +20,7 @@ Required properties:
>  
>  Optional properties:
>  
> - - max-speed: see Documentation/devicetree/bindings/serial/slave-device.txt
> + - max-speed: see Documentation/devicetree/bindings/serial/serial.yaml
>   - shutdown-gpios: GPIO specifier, used to enable the BT module
>   - device-wakeup-gpios: GPIO specifier, used to wakeup the controller
>   - host-wakeup-gpios: GPIO specifier, used to wakeup the host processor.
> diff --git a/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt b/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
> index 112011c51d5e3c1e..219bcbd0d34478ba 100644
> --- a/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
> +++ b/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
> @@ -42,7 +42,7 @@ child node of the serial node with UART.
>  
>  Please refer to the following documents for generic properties:
>  
> -	Documentation/devicetree/bindings/serial/slave-device.txt
> +	Documentation/devicetree/bindings/serial/serial.yaml
>  
>  Required properties:
>  
> diff --git a/Documentation/devicetree/bindings/net/qca,qca7000.txt b/Documentation/devicetree/bindings/net/qca,qca7000.txt
> index 21c36e5249936c4c..8f5ae0b84eec2646 100644
> --- a/Documentation/devicetree/bindings/net/qca,qca7000.txt
> +++ b/Documentation/devicetree/bindings/net/qca,qca7000.txt
> @@ -68,7 +68,7 @@ Required properties:
>  Optional properties:
>  - local-mac-address : see ./ethernet.txt
>  - current-speed     : current baud rate of QCA7000 which defaults to 115200
> -		      if absent, see also ../serial/slave-device.txt
> +		      if absent, see also ../serial/serial.yaml
>  
>  UART Example:
>  
> diff --git a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> index beca6466d59a9d7d..d2202791c1d4c0c5 100644
> --- a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> +++ b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
> @@ -29,7 +29,7 @@ Required properties for compatible string qcom,wcn399x-bt:
>  
>  Optional properties for compatible string qcom,wcn399x-bt:
>  
> - - max-speed: see Documentation/devicetree/bindings/serial/slave-device.txt
> + - max-speed: see Documentation/devicetree/bindings/serial/serial.yaml
>   - firmware-name: specify the name of nvm firmware to load
>   - clocks: clock provided to the controller
>  
> diff --git a/Documentation/devicetree/bindings/net/ti-bluetooth.txt b/Documentation/devicetree/bindings/net/ti-bluetooth.txt
> index 6d03ff8c7068135e..f48c17b38f5851de 100644
> --- a/Documentation/devicetree/bindings/net/ti-bluetooth.txt
> +++ b/Documentation/devicetree/bindings/net/ti-bluetooth.txt
> @@ -15,8 +15,7 @@ standard BT HCI protocol with additional channels for the other functions.
>  TI WiLink devices also have a separate WiFi interface as described in
>  wireless/ti,wlcore.txt.
>  
> -This bindings follows the UART slave device binding in
> -../serial/slave-device.txt.
> +This bindings follows the UART slave device binding in ../serial/serial.yaml.
>  
>  Required properties:
>   - compatible: should be one of the following:
> diff --git a/Documentation/devicetree/bindings/serial/serial.yaml b/Documentation/devicetree/bindings/serial/serial.yaml
> index ca2ae755b560141c..dd97ecd1a7fe8ddd 100644
> --- a/Documentation/devicetree/bindings/serial/serial.yaml
> +++ b/Documentation/devicetree/bindings/serial/serial.yaml
> @@ -7,6 +7,7 @@ $schema: "http://devicetree.org/meta-schemas/core.yaml#";
>  title: Serial Interface Generic DT Bindings
>  
>  maintainers:
> +  - Rob Herring <robh@xxxxxxxxxx>
>    - Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>  
>  description:
> @@ -69,3 +70,58 @@ then:
>    properties:
>      cts-gpios: false
>      rts-gpios: false
> +
> +patternProperties:
> +  ".*":
> +    if:
> +      type: object
> +    then:
> +      description:
> +        Serial attached devices shall be a child node of the host UART device
> +        the slave device is attached to. It is expected that the attached
> +        device is the only child node of the UART device. The slave device node
> +        name shall reflect the generic type of device for the node.
> +
> +      properties:
> +        compatible:
> +          description:
> +            Compatible of the device connected to the serial port.
> +
> +        max-speed:
> +          $ref: /schemas/types.yaml#/definitions/uint32
> +          description:
> +            The maximum baud rate the device operates at.
> +            This should only be present if the maximum is less than the slave
> +            device can support.  For example, a particular board has some
> +            signal quality issue or the host processor can't support higher
> +            baud rates.
> +
> +        current-speed:
> +          $ref: /schemas/types.yaml#/definitions/uint32
> +          description: |
> +            The current baud rate the device operates at.
> +            This should only be present in case a driver has no chance to know
> +            the baud rate of the slave device.
> +            Examples:
> +              * device supports auto-baud
> +              * the rate is setup by a bootloader and there is no way to reset
> +                the device
> +              * device baud rate is configured by its firmware but there is no
> +                way to request the actual settings
> +
> +      required:
> +        - compatible
> +
> +examples:
> +  - |
> +    serial@1234 {
> +            compatible = "ns16550a";
> +            reg = <0x1234 0x20>;
> +            interrupts = <1>;
> +
> +            bluetooth {
> +                    compatible = "brcm,bcm43341-bt";
> +                    interrupt-parent = <&gpio>;
> +                    interrupts = <10>;
> +            };
> +    };
> diff --git a/Documentation/devicetree/bindings/serial/slave-device.txt b/Documentation/devicetree/bindings/serial/slave-device.txt
> deleted file mode 100644
> index 40110e0196209fde..0000000000000000
> --- a/Documentation/devicetree/bindings/serial/slave-device.txt
> +++ /dev/null
> @@ -1,45 +0,0 @@
> -Serial Slave Device DT binding
> -
> -This documents the binding structure and common properties for serial
> -attached devices. Common examples include Bluetooth, WiFi, NFC and GPS
> -devices.
> -
> -Serial attached devices shall be a child node of the host UART device the
> -slave device is attached to. It is expected that the attached device is
> -the only child node of the UART device. The slave device node name shall
> -reflect the generic type of device for the node.
> -
> -Required Properties:
> -
> -- compatible 	: A string reflecting the vendor and specific device the node
> -		  represents.
> -
> -Optional Properties:
> -
> -- max-speed	: The maximum baud rate the device operates at. This should
> -		  only be present if the maximum is less than the slave device
> -		  can support. For example, a particular board has some signal
> -		  quality issue or the host processor can't support higher
> -		  baud rates.
> -- current-speed	: The current baud rate the device operates at. This should
> -		  only be present in case a driver has no chance to know
> -		  the baud rate of the slave device.
> -		  Examples:
> -		    * device supports auto-baud
> -		    * the rate is setup by a bootloader and there is no
> -		      way to reset the device
> -		    * device baud rate is configured by its firmware but
> -		      there is no way to request the actual settings
> -
> -Example:
> -
> -serial@1234 {
> -	compatible = "ns16550a";
> -	interrupts = <1>;
> -
> -	bluetooth {
> -		compatible = "brcm,bcm43341-bt";
> -		interrupt-parent = <&gpio>;
> -		interrupts = <10>;
> -	};
> -};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 59c14ee9a917a794..5f5d074c7b3927a5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15034,7 +15034,7 @@ SERIAL DEVICE BUS
>  M:	Rob Herring <robh@xxxxxxxxxx>
>  L:	linux-serial@xxxxxxxxxxxxxxx
>  S:	Maintained
> -F:	Documentation/devicetree/bindings/serial/slave-device.txt
> +F:	Documentation/devicetree/bindings/serial/serial.yaml
>  F:	drivers/tty/serdev/
>  F:	include/linux/serdev.h
>  
> 



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