drivers/wifi/nrfwifi: Add buffer for discard bytes (c5fa9af2) · Commits · Wenxi XU / zephyr

Some spi drivers do not allow the send buffer and receive buffer to be empty at the same time, if this happens it will cause the spi to be unable to communicate with the nrf7002, so add the receive buffer for the discard byte in the spim_xfer_rx. Fix #80686 Signed-off-by:

Hongquan Li <hongquan.prog@gmail.com>

drivers/wifi/nrfwifi/src/qspi/src/spi_if.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -58,6 +58,7 @@ static int spim_xfer_rx(unsigned int addr, void *data, unsigned int len, unsigne
		addr & 0xFF,
		0 /* dummy byte */
		};
		uint8_t discard[sizeof(hdr) + 2 * 4];

		const struct spi_buf tx_buf[] = {
		{.buf = hdr, .len = sizeof(hdr) },
		@@ -67,12 +68,17 @@ static int spim_xfer_rx(unsigned int addr, void *data, unsigned int len, unsigne
		const struct spi_buf_set tx = { .buffers = tx_buf, .count = 2 };

		const struct spi_buf rx_buf[] = {
		{.buf = NULL, .len = sizeof(hdr) + discard_bytes},
		{.buf = discard, .len = sizeof(hdr) + discard_bytes},
		{.buf = data, .len = len },
		};

		const struct spi_buf_set rx = { .buffers = rx_buf, .count = 2 };

		if (rx_buf[0].len > sizeof(discard)) {
		LOG_ERR("Discard bytes too large, please adjust buf size");
		return -EINVAL;
		}

		return spi_transceive_dt(&spi_spec, &tx, &rx);
		}

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