From: Yunhui Cui yunhui.cui@nxp.com
A-009282: QuadSPI: QuadSPI data pre-fetch can result in incorrect data Affects: QuadSPI Description: With AHB buffer prefetch enabled, the QuadSPI may return incorrect data on the AHB interface. The buffer pre-fetch is enabled if the fetch size as configured either in the LUT or in the BUFxCR register is greater than 8 bytes. Impact: Only 64 bit read allowed. Workaround: Keep the read data size to 64 bits (8 Bytes), which disables the prefetch on the AHB buffer, and prevents this issue from occurring.
Signed-off-by: Yunhui Cui yunhui.cui@nxp.com --- drivers/spi/fsl_qspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c index 75cbab2..e0a002d 100644 --- a/drivers/spi/fsl_qspi.c +++ b/drivers/spi/fsl_qspi.c @@ -444,7 +444,7 @@ static void qspi_init_ahb_read(struct fsl_qspi_priv *priv) qspi_write32(priv->flags, ®s->buf1cr, QSPI_BUFXCR_INVALID_MSTRID); qspi_write32(priv->flags, ®s->buf2cr, QSPI_BUFXCR_INVALID_MSTRID); qspi_write32(priv->flags, ®s->buf3cr, QSPI_BUF3CR_ALLMST_MASK | - (0x80 << QSPI_BUF3CR_ADATSZ_SHIFT)); + (0x1 << QSPI_BUF3CR_ADATSZ_SHIFT));
/* We only use the buffer3 */ qspi_write32(priv->flags, ®s->buf0ind, 0);