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djiatsaf-stcfriedt
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tests: drivers: uart: elementary: stm32: add support for hw flow control
- Configure and attach DMA for each USART node. - Enable hardware flow control capability. - Add RTS/CTS pin name signals. Note: Some platform series are missing due to conflicts with other pins used by different test drivers (RTS pin should be connected to the CTS pin.) Signed-off-by: Fabrice DJIATSA <[email protected]>
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‎tests/drivers/uart/uart_elementary/boards/b_u585i_iot02a.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart3 {
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pinctrl-0 = <&usart3_tx_pd8 &usart3_rx_pd9 &usart3_rts_pd2 &usart3_cts_pb13>;
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dmas = <&gpdma1 0 29 STM32_DMA_PERIPH_TX>,
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<&gpdma1 1 28 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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hw-flow-control;
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};

‎tests/drivers/uart/uart_elementary/boards/nucleo_f091rc.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart3 {
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pinctrl-0 = <&usart3_tx_pc10 &usart3_rx_pc11 &usart3_rts_pb14 &usart3_cts_pb13>;
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pinctrl-names = "default";
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dmas = <&dma1 2 (STM32_DMA_PERIPH_TX | STM32_DMA_PRIORITY_HIGH)>,
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<&dma1 1 (STM32_DMA_PERIPH_RX | STM32_DMA_PRIORITY_HIGH)>;
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dma-names = "tx", "rx";
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hw-flow-control;
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status = "okay";
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};

‎tests/drivers/uart/uart_elementary/boards/nucleo_g071rb.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart1 {
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pinctrl-0 = <&usart1_tx_pb6 &usart1_rx_pb7 &usart1_rts_pa12 &usart1_cts_pa11>;
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dmas = <&dmamux1 3 51 STM32_DMA_PERIPH_TX>,
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<&dmamux1 4 50 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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hw-flow-control;
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};
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&dma1 {
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status = "okay";
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};
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&dmamux1 {
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status = "okay";
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};
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&usb {
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status = "disabled"
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};

‎tests/drivers/uart/uart_elementary/boards/nucleo_g474re.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart1 {
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pinctrl-0 = <&usart1_tx_pc4 &usart1_rx_pc5 &usart1_rts_pa12 &usart1_cts_pa11>;
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dmas = <&dmamux1 2 25 STM32_DMA_PERIPH_TX>,
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<&dmamux1 1 24 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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hw-flow-control;
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};
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&dma1 {
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status = "okay";
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};
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&dmamux1 {
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status = "okay";
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};

‎tests/drivers/uart/uart_elementary/boards/nucleo_h753zi.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart2 {
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dmas = <&dmamux1 2 44 STM32_DMA_PERIPH_TX>,
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<&dmamux1 3 43 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pd6>;
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pinctrl-names = "default";
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current-speed = <115200>;
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hw-flow-control;
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status = "okay";
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};
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&dma1 {
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status = "okay";
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};
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&dma2 {
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status = "okay";
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};
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&dmamux1 {
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status = "okay";
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};

‎tests/drivers/uart/uart_elementary/boards/nucleo_l152re.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart3 {
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pinctrl-0 = <&usart3_tx_pc10 &usart3_rx_pc11 &usart3_rts_pb14 &usart3_cts_pb13>;
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pinctrl-names = "default";
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dmas = <&dma1 2 (STM32_DMA_PERIPH_TX | STM32_DMA_PRIORITY_HIGH)>,
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<&dma1 3 (STM32_DMA_PERIPH_RX | STM32_DMA_PRIORITY_HIGH)>;
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dma-names = "tx", "rx";
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hw-flow-control;
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status = "okay";
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};
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&dma1 {
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status = "okay";
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};

‎tests/drivers/uart/uart_elementary/boards/stm32n6570_dk_stm32n657xx_sb.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart2 {
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pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pf6 &usart2_rts_pg14 &usart2_cts_pg5>;
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dmas = <&gpdma1 0 110 STM32_DMA_PERIPH_TX>,
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<&gpdma1 1 109 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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hw-flow-control;
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};
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&gpdma1 {
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status = "okay";
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};

‎tests/drivers/uart/uart_elementary/boards/stm32u083c_dk.overlay‎

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/*
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* Copyright (c) 2025 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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dut: &usart3 {
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pinctrl-0 = <&usart3_tx_pc4 &usart3_rx_pc5 &usart3_rts_pb14 &usart3_cts_pb13>;
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dmas = <&dmamux1 5 74 STM32_DMA_PERIPH_TX>,
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<&dmamux1 4 73 STM32_DMA_PERIPH_RX>;
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dma-names = "tx", "rx";
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hw-flow-control;
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};
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&dma1 {
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status = "okay";
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};
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&dma2 {
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status = "okay";
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};
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&dmamux1 {
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status = "okay";
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};

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