| /* |
| * Copyright (c) 2020 Stephanos Ioannidis <root@stephanos.io> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| &sercom4 { |
| /* Internally connect MOSI to MISO for loop-back operation */ |
| dipo = <3>; |
| dopo = <2>; |
| /* Assign a CS pin */ |
| cs-gpios = <&portb 28 GPIO_ACTIVE_LOW>; |
| /* Configure DMA */ |
| dmas = <&dmac 0 12>, <&dmac 1 13>; |
| dma-names = "rx", "tx"; |
| slow@0 { |
| compatible = "test-spi-loopback-slow"; |
| reg = <0>; |
| spi-max-frequency = <500000>; |
| }; |
| fast@0 { |
| compatible = "test-spi-loopback-fast"; |
| reg = <0>; |
| spi-max-frequency = <16000000>; |
| }; |
| }; |
