[PATCH v2 1/2] dt-bindings: iio: adc: exynos-adc: require second interrupt with touch screen

[Krzysztof Kozlowski]

The ADC in S3C/S5P/Exynos SoCs can be used also for handling touch
screen.  In such case the second interrupt is required.  This second
interrupt can be anyway provided, even without touch screens.  This
fixes dtbs_check warnings like:

  arch/arm/boot/dts/s5pv210-aquila.dt.yaml: adc at e1700000: interrupts: [[23], [24]] is too long

Signed-off-by: Krzysztof Kozlowski <krzk at kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron at huwei.com>

---

Changes since v1:
1. Fix if:has-touchscreen, as pointed by Rob.
2. Add Ack.
---
 .../bindings/iio/adc/samsung,exynos-adc.yaml       | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml
index cc3c8ea6a894..17a08be3fe85 100644
--- a/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml
@@ -41,7 +41,10 @@ properties:
     maxItems: 2
 
   interrupts:
-    maxItems: 1
+    description:
+      ADC interrupt followed by optional touchscreen interrupt.
+    minItems: 1
+    maxItems: 2
 
   "#io-channel-cells":
     const: 1
@@ -107,6 +110,15 @@ allOf:
           items:
             - const: adc
 
+  - if:
+      required:
+        - has-touchscreen
+    then:
+      properties:
+        interrupts:
+          minItems: 2
+          maxItems: 2
+
 examples:
   - |
     adc: adc at 12d10000 {
-- 
2.17.1