On Mon, Feb 24, 2020 at 4:52 PM Kuldeep Singh <kuldeep.si...@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.si...@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) ?
