On Mon, Feb 24, 2020 at 4:52 PM Kuldeep Singh kuldeep.singh@nxp.com wrote:
Board gets reset when performing burst read/write operations. On the other hand, no such behaviour is observed on small size operations.
In Linux, readl_poll_timeout API already add delay of 1us which is skipped in U-boot. Since, NXP Flexspi U-boot driver is a ported version of Linux driver and U-boot poll_timeout API lacks delay functionality, add 1us delay so as to make controller ready for other transactions.
Signed-off-by: Kuldeep Singh kuldeep.singh@nxp.com
drivers/spi/nxp_fspi.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/spi/nxp_fspi.c b/drivers/spi/nxp_fspi.c index 0e6c7be..9703642 100644 --- a/drivers/spi/nxp_fspi.c +++ b/drivers/spi/nxp_fspi.c @@ -756,6 +756,7 @@ static int nxp_fspi_exec_op(struct spi_slave *slave, err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0, FSPI_STS0_ARB_IDLE, 1, POLL_TOUT, true); WARN_ON(err);
udelay(1);
Can you add relevant comments here, why is it for udelay(1) ?