dts: bindings: serial: nrfx_uarte: Add pin-retention property

nordic-krch · nordic-krch · commit 409bd99fe9b1 · 2024-11-12T12:51:06.000+01:00
Add property to nrfx_uarte which indicates that pins must
be retained for the given instance when it is disabled.

Add that property to uart120 instances as those always
require that since pins are routed through CTRLSEL. For
other instances there are exceptions when CTRLSEL is used
(see the specification).

Signed-off-by: Krzysztof Chruściński &lt;krzysztof.chruscinski@nordicsemi.no&gt;
diff --git a/dts/bindings/serial/nordic,nrf-uarte.yaml b/dts/bindings/serial/nordic,nrf-uarte.yaml
@@ -14,3 +14,9 @@ properties:
     type: boolean
     description: |
       UARTE has RX frame timeout HW feature.
+  pin-retention:
+    type: boolean
+    description: |
+      UARTE pin states must be retained when peripheral is disabled.
+      It is required when CTRLSEL is used to route UARTE pins. It is always the
+      case for fast peripheral and in special cases for slow peripherals.
diff --git a/dts/common/nordic/nrf54h20.dtsi b/dts/common/nordic/nrf54h20.dtsi
@@ -669,6 +669,7 @@
 				power-domains = <&gpd NRF_GPD_FAST_ACTIVE1>;
 				endtx-stoptx-supported;
 				frame-timeout-supported;
+				pin-retention;
 			};
 
 			spi121: spi@8e7000 {
diff --git a/dts/common/nordic/nrf9280.dtsi b/dts/common/nordic/nrf9280.dtsi
@@ -508,6 +508,7 @@
 				interrupts = <230 NRF_DEFAULT_IRQ_PRIORITY>;
 				endtx-stoptx-supported;
 				frame-timeout-supported;
+				pin-retention;
 			};
 
 			spi121: spi@8e7000 {
