| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| &pinctrl { |
| sercom3_loopback: sercom3_loopback { |
| group1 { |
| pinmux = <PA16D_SERCOM3_PAD0>; |
| }; |
| }; |
| }; |
| |
| &dmac { |
| status = "okay"; |
| }; |
| |
| &sercom0 { |
| /* Configure DMA channels for async operation */ |
| dmas = <&dmac 0 1>, <&dmac 1 2>; |
| dma-names = "rx", "tx"; |
| }; |
| |
| &sercom3 { |
| status = "okay"; |
| compatible = "atmel,sam0-uart"; |
| current-speed = <115200>; |
| |
| /* Internally loop-back TX and RX on PAD0 */ |
| rxpo = <0>; |
| txpo = <0>; |
| |
| /* PAD0 must be configured to allow working loop-back */ |
| pinctrl-0 = <&sercom3_loopback>; |
| pinctrl-names = "default"; |
| |
| /* Configure DMA channels for async operation */ |
| dmas = <&dmac 10 7>, <&dmac 11 8>; |
| dma-names = "rx", "tx"; |
| }; |
