[PATCH v2 1/8] dt-bindings: pwm: samsung: Do not require interrupts on Exynos SoCs

[Krzysztof Kozlowski]

The bindings required interrupts for all SoCs but actually only the PWM
timer clocksource (for S3C/S5P SoCs) was using them.  This PWM timer
clocksource driver is not used on Exynos SoCs thus the interrupts can be
marked as optional.

Reported-by: Alim Akhtar <alim.akhtar at samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk at kernel.org>

---

Changes since v1:
1. New patch
---
 .../devicetree/bindings/pwm/pwm-samsung.yaml  | 23 +++++++++++++++----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-samsung.yaml b/Documentation/devicetree/bindings/pwm/pwm-samsung.yaml
index fc799b0577d4..188679cb8b8c 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-samsung.yaml
+++ b/Documentation/devicetree/bindings/pwm/pwm-samsung.yaml
@@ -18,9 +18,6 @@ description: |+
 
   Be aware that the clocksource driver supports only uniprocessor systems.
 
-allOf:
-  - $ref: pwm.yaml#
-
 properties:
   compatible:
     enum:
@@ -63,7 +60,8 @@ properties:
 
   interrupts:
     description:
-      One interrupt per timer, starting at timer 0.
+      One interrupt per timer, starting at timer 0. Necessary only for SoCs which
+      use PWM clocksource.
     minItems: 1
     maxItems: 5
 
@@ -88,12 +86,27 @@ required:
   - clocks
   - clock-names
   - compatible
-  - interrupts
   - "#pwm-cells"
   - reg
 
 additionalProperties: false
 
+allOf:
+  - $ref: pwm.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,s3c2410-pwm
+              - samsung,s3c6400-pwm
+              - samsung,s5p6440-pwm
+              - samsung,s5pc100-pwm
+    then:
+      required:
+        - interrupts
+
 examples:
   - |
     pwm at 7f006000 {
-- 
2.17.1