Cadence TTC can act as PWM device, it is 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.
Updated bindings to support TTC PWM configuration.
Signed-off-by: Mubin Sayyed <mubin.sayyed@xxxxxxx>
---
.../devicetree/bindings/timer/cdns,ttc.yaml | 25 ++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
index 7d821fd480f6..2855e92e02e3 100644
--- a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
+++ b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
@@ -32,12 +32,26 @@ properties:
description: |
Bit width of the timer, necessary if not 16.
+ "#pwm-cells":
+ description: |
+ Required to configure TTC as PWM device, supported cells are 0 to 3.
+ minimum: 0
+ maximum: 3
+
required:
- compatible
- reg
- - interrupts
- clocks
+allOf:
+ - if:
+ not:
+ required:
+ - "#pwm-cells"
+ then:
+ required:
+ - interrupts
+
additionalProperties: false
examples:
@@ -50,3 +64,12 @@ examples:
clocks = <&cpu_clk 3>;
timer-width = <32>;
};
+
+ - |
+ ttc1: ttc1@f8002000 {
+ compatible = "cdns,ttc";
+ reg = <0xF8002000 0x1000>;
+ clocks = <&cpu_clk 3>;
+ timer-width = <32>;
+ #pwm-cells = <3>;
+ };
--
2.25.1
