[PATCH v2 4/5] dt-bindings: arm: atmel,at91rm9200-st: convert to DT schema

[Akhila YS]

On 24-02-2026 23:18, Conor Dooley wrote:
> On Tue, Feb 24, 2026 at 02:46:49PM +0000, Akhila YS wrote:
>> Convert System Timer binding to YAML format.
>>
>> Signed-off-by: Akhila YS <akhilayalmati at gmail.com>
>> ---
>>  .../bindings/arm/atmel,at91rm9200-st.yaml          | 65 ++++++++++++++++++++++
>>  1 file changed, 65 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/atmel,at91rm9200-st.yaml b/Documentation/devicetree/bindings/arm/atmel,at91rm9200-st.yaml
>> new file mode 100644
>> index 000000000000..ff485b37cba8
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/atmel,at91rm9200-st.yaml
>> @@ -0,0 +1,65 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/arm/atmel,at91rm9200-st.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Atmel System Timer
>> +
>> +maintainers:
>> +  - Nicolas Ferre <nicolas.ferre at microchip.com>
>> +  - Claudiu Beznea <claudiu at tuxon.dev>
>> +
>> +description:
>> +  The System Timer (ST) module in AT91RM9200 provides periodic tick and
>> +  alarm capabilities. It is exposed as a simple multi-function device
>> +  (simple-mfd + syscon) because it shares its register space and interrupt
>> +  with other System Controller blocks.
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - const: atmel,at91rm9200-st
>> +      - const: syscon
>> +      - const: simple-mfd
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  watchdog:
>> +    type: object
>> +    description: Watchdog timer subnode.
>> +    properties:
>> +      compatible:
>> +        const: atmel,at91rm9200-wdt
>> +    required:
>> +      - compatible
> This should just be a ref to the binding providing the watchdog.
>
> I am guessing you didn't test this against all bindings, only against
> /this/ binding and therefore missed the fact that it doesn't comply with
> the binding for the watchdog itself.


Ok, i will take watchdog properties as a ref from different yaml.

>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>> +  - clocks
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/irq.h>
>> +    timer at fffffd00 {
>> +        compatible = "atmel,at91rm9200-st", "syscon", "simple-mfd";
>> +        reg = <0xfffffd00 0x100>;
>> +        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
>> +        clocks = <&slow_xtal>;
>> +
>> +        watchdog {
>> +                compatible = "atmel,at91rm9200-wdt";
>> +        };
>> +    };
>> +...
>>
>> -- 
>> 2.43.0
>>
-- 
Best Regards,
Akhila.