tests: drivers: uart: mix_fifo_poll: Add UARTE120 to nrf54h20dk test

Add configuration for UARTE120 fast instance. Use multi-instance capability
of the test to run same test on UARTE120 and slow UARTE peripheral.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54h20dk_nrf54h20_common.dtsi

@@ -19,6 +19,27 @@
 			low-power-enable;
 		};
 	};
+	uart120_default_alt: uart120_default_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 7, 7)>,
+				<NRF_PSEL(UART_RTS, 7, 5)>;
+		};
+		group2 {
+			psels = <NRF_PSEL(UART_RX, 7, 4)>,
+				<NRF_PSEL(UART_CTS, 7, 6)>;
+			bias-pull-up;
+		};
+	};
+
+	uart120_sleep_alt: uart120_sleep_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 7, 7)>,
+				<NRF_PSEL(UART_RX, 7, 4)>,
+				<NRF_PSEL(UART_RTS, 7, 5)>,
+				<NRF_PSEL(UART_CTS, 7, 6)>;
+			low-power-enable;
+		};
+	};
 };
 
 dut: &uart137 {
@@ -30,7 +51,15 @@ dut: &uart137 {
 	hw-flow-control;
 };
 
-/* Use timer137 as only this one can generate interrupts on cpusys. */
+dut2: &uart120 {
+	status = "okay";
+	pinctrl-0 = <&uart120_default_alt>;
+	pinctrl-1 = <&uart120_sleep_alt>;
+	pinctrl-names = "default", "sleep";
+	current-speed = <115200>;
+	hw-flow-control;
+};
+
 counter_dev: &timer137 {
 	status = "okay";
 };

tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -6,6 +6,14 @@
 	memory-regions = <&cpuapp_dma_region>;
 };
 
+&dma_fast_region {
+	status = "okay";
+};
+
+&dut2 {
+	memory-regions = <&dma_fast_region>;
+};
+
 &grtc {
 	interrupts = <109 2>;
 };

tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54h20dk_nrf54h20_cpuppr.overlay

@@ -9,3 +9,8 @@
 &dut {
 	interrupts = <470 (NRF_DEFAULT_IRQ_PRIORITY + 1)>;
 };
+
+/* PPR cannot use that instance. */
+&uart120 {
+	status = "disabled"
+};

tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54h20dk_nrf54h20_cpurad.overlay

@@ -6,6 +6,14 @@
 	memory-regions = <&cpurad_dma_region>;
 };
 
+&dma_fast_region {
+	status = "okay";
+};
+
+&dut2 {
+	memory-regions = <&dma_fast_region>;
+};
+
 &grtc {
 	interrupts = <109 2>;
 };

tests/drivers/uart/uart_mix_fifo_poll/src/main.c

@@ -52,6 +52,12 @@ static struct dut_data duts[] = {
 		.dev = DEVICE_DT_GET(UART_NODE),
 		.name = DT_NODE_FULL_NAME(UART_NODE),
 	},
+#if DT_NODE_EXISTS(DT_NODELABEL(dut2))
+	{
+		.dev = DEVICE_DT_GET(DT_NODELABEL(dut2)),
+		.name = DT_NODE_FULL_NAME(DT_NODELABEL(dut2)),
+	},
+#endif
 };
 
 #define BUF_SIZE 16