Cadence TTC can act as PWM device, it will be supported through separate PWM framework based driver. Decision to configure specific TTC device as PWM or clocksource/clockevent would be done based on presence of "#pwm-cells" property. Also, interrupt property is not required for TTC PWM driver. Update bindings to support TTC PWM configuration. Signed-off-by: Mubin Sayyed <mubin.sayyed@xxxxxxx> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- Changes for v3: Add Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> tag Remove bindings from subject 1/3 and 3/3 are dropped as of now (WIP). Changes for v2: Update subject Modify #pwm-cells to constant 3 Update example to use generic name link for v2: https://lore.kernel.org/linux-arm-kernel/20231114124748.581850-2-mubin.sayyed@xxxxxxx/T/ --- .../devicetree/bindings/timer/cdns,ttc.yaml | 22 ++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml index dbba780c9b02..da342464d32e 100644 --- a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml +++ b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml @@ -32,12 +32,23 @@ properties: description: | Bit width of the timer, necessary if not 16. + "#pwm-cells": + const: 3 + required: - compatible - reg - - interrupts - clocks +allOf: + - if: + not: + required: + - "#pwm-cells" + then: + required: + - interrupts + additionalProperties: false examples: @@ -50,3 +61,12 @@ examples: clocks = <&cpu_clk 3>; timer-width = <32>; }; + + - | + pwm: pwm@f8002000 { + compatible = "cdns,ttc"; + reg = <0xf8002000 0x1000>; + clocks = <&cpu_clk 3>; + timer-width = <32>; + #pwm-cells = <3>; + }; -- 2.25.1
