CONFIG_SPI_LOOPBACK_DRV_NAME="SERCOM1"
CONFIG_SPI_LOOPBACK_MODE_LOOP=y
CONFIG_SPI_LOOPBACK_CS_GPIO=y
CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_DRV_NAME="PORTA"
CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_PIN=7