On Thu, Aug 18, 2022 at 08:36:37PM +0530, Srinivas Neeli wrote:
> Convert Xilinx watchdog bindings to DT schema format using json-schema
>
> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
> Signed-off-by: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> Changes in V2:
> - Updated file name with compatible.
> - Added subsystem name in subject prefix.
> - Address minior comments.
> ---
> .../bindings/watchdog/of-xilinx-wdt.txt | 26 -------
> .../watchdog/xlnx,xps-timebase-wdt.yaml | 68 +++++++++++++++++++
> 2 files changed, 68 insertions(+), 26 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
> create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
>
> diff --git a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
> deleted file mode 100644
> index c6ae9c9d5e3e..000000000000
> --- a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
> +++ /dev/null
> @@ -1,26 +0,0 @@
> -Xilinx AXI/PLB soft-core watchdog Device Tree Bindings
> ----------------------------------------------------------
> -
> -Required properties:
> -- compatible : Should be "xlnx,xps-timebase-wdt-1.00.a" or
> - "xlnx,xps-timebase-wdt-1.01.a".
> -- reg : Physical base address and size
> -
> -Optional properties:
> -- clocks : Input clock specifier. Refer to common clock
> - bindings.
> -- clock-frequency : Frequency of clock in Hz
> -- xlnx,wdt-enable-once : 0 - Watchdog can be restarted
> - 1 - Watchdog can be enabled just once
> -- xlnx,wdt-interval : Watchdog timeout interval in 2^<val> clock cycles,
> - <val> is integer from 8 to 31.
> -
> -Example:
> -axi-timebase-wdt@40100000 {
> - clock-frequency = <50000000>;
> - compatible = "xlnx,xps-timebase-wdt-1.00.a";
> - clocks = <&clkc 15>;
> - reg = <0x40100000 0x10000>;
> - xlnx,wdt-enable-once = <0x0>;
> - xlnx,wdt-interval = <0x1b>;
> -} ;
> diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
> new file mode 100644
> index 000000000000..493a1c954707
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/xlnx,xps-timebase-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx AXI/PLB softcore and window Watchdog Timer
> +
> +maintainers:
> + - Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
> + - Srinivas Neeli <srinivas.neeli@xxxxxxxxxx>
> +
> +description:
> + The Timebase watchdog timer(WDT) is a free-running 32 bit counter.
> + WDT uses a dual-expiration architecture. After one expiration of
> + the timeout interval, an interrupt is generated and the WDT state
> + bit is set to one in the status register. If the state bit is not
> + cleared (by writing a one to the state bit) before the next
> + expiration of the timeout interval, a WDT reset is generated.
> +
> +allOf:
> + - $ref: watchdog.yaml#
> +
> +properties:
> + compatible:
> + enum:
> + - xlnx,xps-timebase-wdt-1.01.a
> + - xlnx,xps-timebase-wdt-1.00.a
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-frequency:
> + description: Frequency of clock in Hz
> +
> + xlnx,wdt-interval:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Watchdog timeout interval
> + minimum: 8
> + maximum: 32
> +
> + xlnx,wdt-enable-once:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum: [0, 1]
> + description: If watchdog is configured as enable once,
> + then the watchdog cannot be disabled after
> + it has been enabled.
> +
> +required:
> + - compatible
> + - reg
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + watchdog@40100000 {
> + compatible = "xlnx,xps-timebase-wdt-1.00.a";
> + reg = <0x40100000 0x1000>;
> + clock-frequency = <50000000>;
> + clocks = <&clkc 15>;
> + xlnx,wdt-enable-once = <0x0>;
> + xlnx,wdt-interval = <0x1b>;
> + };
> +...
