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

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Date:   Thu,  2 Jul 2020 17:51:42 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: [PATCH v2 1/8] dt-bindings: pwm: samsung: Do not require interrupts on Exynos SoCs

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@...sung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.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@...06000 {
-- 
2.17.1