[nrf fromlist] tests: boards: nrf: qdec: Fix test for multiple instances

- Fixed pin configuration for nRF54L15 (QDECs can use only port 1)
- Changed the way the test handles testing multiple instances
  to make it possible to output quadrature signal to one QDEC
  instance at a time.

Upstream PR #: 93927

Signed-off-by: Michał Bainczyk <[email protected]>

Author: mib1-nordic

tests/boards/nrf/qdec/boards/bl54l15_dvk_nrf54l15_common.dtsi

@@ -5,12 +5,6 @@
  */
 
 / {
-	aliases {
-		qdec0 = &qdec20;
-		qenca = &phase_a;
-		qencb = &phase_b;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
 
@@ -22,6 +16,14 @@
 			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec20>;
+			qenc-emul-gpios = <&phase_a &phase_b>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/boards/bl54l15u_dvk_nrf54l15_common.dtsi

@@ -5,12 +5,6 @@
  */
 
 / {
-	aliases {
-		qdec0 = &qdec20;
-		qenca = &phase_a;
-		qencb = &phase_b;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
 
@@ -22,6 +16,14 @@
 			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec20>;
+			qenc-emul-gpios = <&phase_a &phase_b>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/boards/nrf52840dk_nrf52840.overlay

@@ -22,6 +22,13 @@
 		};
 	};
 
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec0>;
+			qenc-emul-gpios = <&phase_a &phase_b>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -4,12 +4,6 @@
  */
 
 / {
-	aliases {
-		qdec0 = &qdec1;
-		qenca = &phase_a;
-		qencb = &phase_b;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
 		phase_a: phase_a {
@@ -21,6 +15,14 @@
 			gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec1>;
+			qenc-emul-gpios = <&phase_a &phase_b>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -11,21 +11,12 @@
  */
 
 / {
-	aliases {
-		qdec0 = &qdec130;
-		qdec1 = &qdec131;
-		qenca = &phase_a;
-		qencb = &phase_b;
-		qenca1 = &phase_a1;
-		qencb1 = &phase_b1;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
-		phase_a: phase_a {
+		phase_a0: phase_a0 {
 			gpios = <&gpio2 9 GPIO_ACTIVE_HIGH>;
 		};
-		phase_b: phase_b {
+		phase_b0: phase_b0 {
 			gpios = <&gpio2 11 GPIO_ACTIVE_HIGH>;
 		};
 		phase_a1: phase_a1 {
@@ -35,6 +26,18 @@
 			gpios = <&gpio7 1 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec130>;
+			qenc-emul-gpios = <&phase_a0 &phase_b0>;
+		};
+		loopback1 {
+			qdec = <&qdec131>;
+			qenc-emul-gpios = <&phase_a1 &phase_b1>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/boards/nrf54l15dk_nrf54l15_common.dtsi

@@ -4,35 +4,38 @@
  */
 
 /* Required loopbacks
- * P1.8 <-> P1.9
- * P1.10 >-> P1.11
- * P2.8 <-> P2.9
- * P2.10 <-> P1.14
+ * P1.8  <-> P1.9
+ * P1.10 <-> P1.11
+ * P1.12 <-> P1.13
+ * P1.14 <-> P2.10
  */
 
 / {
-	aliases {
-		qdec0 = &qdec20;
-		qdec1 = &qdec21;
-		qenca = &phase_a;
-		qencb = &phase_b;
-		qenca1 = &phase_a1;
-		qencb1 = &phase_b1;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
-		phase_a: phase_a {
+		phase_a0: phase_a0 {
 			gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
 		};
-		phase_b: phase_b {
+		phase_b0: phase_b0 {
 			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
 		};
 		phase_a1: phase_a1 {
-			gpios = <&gpio2 9 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
 		};
 		phase_b1: phase_b1 {
-			gpios = <&gpio1 14 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio2 10 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec20>;
+			qenc-emul-gpios = <&phase_a0 &phase_b0>;
+		};
+		loopback1 {
+			qdec = <&qdec21>;
+			qenc-emul-gpios = <&phase_a1 &phase_b1>;
 		};
 	};
 };
@@ -55,15 +58,15 @@
 
 	qdec_21_pinctrl: qdec_21_pinctrl {
 		group1 {
-			psels = <NRF_PSEL(QDEC_A, 2, 8)>,
-				<NRF_PSEL(QDEC_B, 2, 10)>;
+			psels = <NRF_PSEL(QDEC_A, 1, 12)>,
+				<NRF_PSEL(QDEC_B, 1, 14)>;
 		};
 	};
 
 	qdec_21_sleep_pinctrl: qdec_21_sleep_pinctrl {
 		group1 {
-			psels = <NRF_PSEL(QDEC_A, 2, 8)>,
-				<NRF_PSEL(QDEC_B, 2, 10)>;
+			psels = <NRF_PSEL(QDEC_A, 1, 12)>,
+				<NRF_PSEL(QDEC_B, 1, 14)>;
 			low-power-enable;
 		};
 	};

tests/boards/nrf/qdec/boards/nrf54lm20dk_nrf54lm20_common.dtsi

@@ -11,12 +11,6 @@
  */
 
 / {
-	aliases {
-		qdec0 = &qdec20;
-		qenca = &phase_a;
-		qencb = &phase_b;
-	};
-
 	encoder-emulate {
 		compatible = "gpio-leds";
 		phase_a: phase_a {
@@ -26,6 +20,14 @@
 			gpios = <&gpio1 23 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	qdec_loopbacks: loopbacks {
+		compatible = "test-qdec-loopbacks";
+		loopback0 {
+			qdec = <&qdec20>;
+			qenc-emul-gpios = <&phase_a &phase_b>;
+		};
+	};
 };
 
 &pinctrl {

tests/boards/nrf/qdec/dts/bindings/test-qdec-loopback.yaml

@@ -0,0 +1,20 @@
+description: |
+  Binding describing loopbacks required to run tests/boards/nrf/qdec test in Zephyr.
+
+compatible: "test-qdec-loopbacks"
+
+child-binding:
+  description: |
+    Binding describing a single loopback pair consisting of a QDEC device and two "gpio-leds" pins
+    working as a quadrature encoder for the test.
+  properties:
+    qdec:
+      type: phandle
+      required: true
+      description: Node of the QDEC device used to capture quadrature signal in the loopback.
+    qenc-emul-gpios:
+      type: phandles
+      required: true
+      description: |
+        Children nodes of "gpio-leds" compatible used to generate quadrature signal. The first
+        phandles outputs phase A signal, the second one outputs phase B signal.