[PATCH v9 1/3] dt-bindings: pwm: dwc: Document optional resets property

[dongxuyang]

From: Xuyang Dong <dongxuyang@xxxxxxxxxxxxxxxxxx>

The DesignWare PWM IP has two active-low reset inputs: presetn resets
the register interface logic in the pclk (bus) domain, and
timer_N_resetn resets the counter/timer logic in the timer_N_clk
domain. The existing snps,dw-apb-timers-pwm2 binding does not
describe either of these lines.

Add the resets property and describe the function of each reset to
support future use of resets.

Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: Xuyang Dong <dongxuyang@xxxxxxxxxxxxxxxxxx>
---
 .../devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml b/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
index 7523a89a1773..213fdaef25d9 100644
--- a/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
+++ b/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
@@ -43,6 +43,11 @@ properties:
       - const: bus
       - const: timer
 
+  resets:
+    items:
+      - description: Interface bus (presetn) reset
+      - description: PWM timer logic (timer_N_resetn) reset
+
   snps,pwm-number:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: The number of PWM channels configured for this instance
-- 
2.34.1