tests: zephyr: drivers: comparators: Add support for nRF7120

Add all support required for nRF7120 to compile tests successfully,
can't be tested with FPGA.

Signed-off-by: Robert Robinson <[email protected]>

Author: rob-robinson-14

tests/zephyr/boards/nrf/comp/boards/nrf7120pdk_nrf7120_cpuapp.conf

@@ -0,0 +1,4 @@
+CONFIG_TEST_COMP_SE_PSEL_AIN_INDEX=0
+CONFIG_TEST_COMP_SE_EXTREFSEL_AIN_INDEX=5
+CONFIG_TEST_COMP_DIFF_PSEL_AIN_INDEX=1
+CONFIG_TEST_COMP_DIFF_EXTREFSEL_AIN_INDEX=0

tests/zephyr/boards/nrf/comp/boards/nrf7120pdk_nrf7120_cpuapp.overlay

@@ -0,0 +1,33 @@
+/* Two loopbacks are used
+ * Each loopback is between analog input and GPIO.
+ * first-gpios (P0.02) -> AIN1 (P0.01)
+ * second-gpios (P0.03, AIN3) -> (P0.00, AIN0)
+ * AIN5 (P0.05) -> VDD
+ */
+
+/ {
+	aliases {
+		test-comp = ∁
+	};
+
+	zephyr,user {
+		first-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>; // Link to CONFIG_TEST_COMP_DIFF_PSEL_AIN_INDEX - Needs to loop to P0.01
+		second-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>; // Loopback to CONFIG_TEST_COMP_SE_PSEL_AIN_INDEX
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&comp {
+	status = "okay";
+	psel = "AIN4";
+	refsel = "AREF";
+	extrefsel= "AIN3";
+	sp-mode = "LOW";
+	th-up = <36>;
+	th-down = <30>;
+	isource = "DISABLED";
+	enable-hyst;
+};

tests/zephyr/boards/nrf/comp/testcase.yaml

@@ -10,5 +10,7 @@ tests:
     platform_allow:
       - nrf54lv10dk/nrf54lv10a/cpuapp
       - [email protected]/nrf54lv10a/cpuapp
+      - nrf7120pdk/nrf7120/cpuapp
     integration_platforms:
       - nrf54lv10dk/nrf54lv10a/cpuapp
+      - nrf7120pdk/nrf7120/cpuapp

tests/zephyr/drivers/comparator/gpio_loopback/boards/nrf7120pdk_nrf7120_cpuapp.overlay

@@ -0,0 +1,19 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+/*
+ * P0.03 looped back to P0.00
+ */
+
+/ {
+	aliases {
+		test-comp = &comp;
+	};
+
+	zephyr,user {
+		test-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};

tests/zephyr/drivers/comparator/gpio_loopback/snippets/nrf_comp/boards/nrf7120pdk_nrf7120_cpuapp.overlay

@@ -0,0 +1,11 @@
+
+&comp {
+	main-mode = "SE";
+	psel = "AIN0"; /* P0.00 */
+	refsel = "INT_1V2";
+	sp-mode = "HIGH";
+	th-up = <63>;
+	th-down = <59>;
+	isource = "DISABLED";
+	status = "okay";
+};

tests/zephyr/drivers/comparator/gpio_loopback/snippets/nrf_comp/snippet.yml

@@ -4,3 +4,6 @@ boards:
   nrf54lv10dk/nrf54lv10a/cpuapp:
     append:
       EXTRA_DTC_OVERLAY_FILE: boards/nrf54lv10dk_nrf54lv10a_cpuapp.overlay
+  nrf7120pdk/nrf7120/cpuapp:
+    append:
+      EXTRA_DTC_OVERLAY_FILE: boards/nrf7120pdk_nrf7120_cpuapp.overlay

tests/zephyr/drivers/comparator/gpio_loopback/snippets/nrf_lpcomp/boards/nrf7120pdk_nrf7120_cpuapp.overlay

@@ -0,0 +1,7 @@
+
+&comp {
+	compatible = "nordic,nrf-lpcomp";
+	psel = "AIN0"; /* P0.00 */
+	refsel = "VDD_4_8";
+	status = "okay";
+};

tests/zephyr/drivers/comparator/gpio_loopback/snippets/nrf_lpcomp/snippet.yml

@@ -4,3 +4,6 @@ boards:
   nrf54lv10dk/nrf54lv10a/cpuapp:
     append:
       EXTRA_DTC_OVERLAY_FILE: boards/nrf54lv10dk_nrf54lv10a_cpuapp.overlay
+  nrf7120pdk/nrf7120/cpuapp:
+    append:
+      EXTRA_DTC_OVERLAY_FILE: boards/nrf7120pdk_nrf7120_cpuapp.overlay

tests/zephyr/drivers/comparator/gpio_loopback/testcase.yaml

@@ -8,8 +8,10 @@ common:
   platform_allow:
     - nrf54lv10dk/nrf54lv10a/cpuapp
     - [email protected]/nrf54lv10a/cpuapp
+    - nrf7120pdk/nrf7120/cpuapp
   integration_platforms:
     - nrf54lv10dk/nrf54lv10a/cpuapp
+    - nrf7120pdk/nrf7120/cpuapp
 tests:
   nrf.extended.drivers.comparator.gpio_loopback.nrf_comp:
     extra_args: