问Zephyr RTOS中QSPI芯片选针控制与配置问题

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#include <drivers/gpio.h>
#include <drivers/spi.h>

struct spi_cs_control spi_cs = {
    /* PA4 as CS pin */
    .gpio_dev = DEVICE_DT_GET(DT_NODELABEL(gpioa)),
    .gpio_pin = 4,
    .gpio_dt_flags = GPIO_ACTIVE_LOW,
    /* delay in microseconds to wait before starting the transmission and before releasing the CS line */
    .delay = 10,
};

#define SPI_CS (&spi_cs)

struct spi_config spi_cfg = {
    .frequency = 350000,
    .operation = SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | SPI_WORD_SET(8) | SPI_LINES_QUAD | SPI_LOCK_ON,
    .cs = SPI_CS,
};

void spi_init()
{
    spi = device_get_binding("SPI_1");
    ....
}