| /* |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Copyright (c) 2021 Argentum Systems Ltd. |
| */ |
| |
| &dmac { |
| status = "okay"; |
| }; |
| |
| &sercom0 { |
| /* configure DMA channels for async operation */ |
| dmas = <&dmac 0 0x01>, <&dmac 1 0x02>; |
| dma-names = "rx", "tx"; |
| }; |
| |
| &pinctrl { |
| sercom2_default: sercom2_default { |
| group1 { |
| pinmux = <PA8D_SERCOM2_PAD0>; |
| }; |
| }; |
| }; |
| dut: &sercom2 { |
| status = "okay"; |
| compatible = "atmel,sam0-uart"; |
| current-speed = <115200>; |
| |
| /* internally loop-back Tx and Rx on PAD0 */ |
| rxpo = <0>; |
| txpo = <0>; |
| |
| /* configure DMA channels for async operation */ |
| dmas = <&dmac 0 0x05>, <&dmac 1 0x06>; |
| dma-names = "rx", "tx"; |
| |
| /* PAD0 must be configured to allow working loop-back */ |
| pinctrl-0 = <&sercom2_default>; |
| pinctrl-names = "default"; |
| }; |
