Re: [PATCH] [PATCH v1] spi: cadence: Add usleep_range() for cdns_spi_fill_tx_fifo()
On Mon, Apr 16, 2018 at 02:46:40PM +0800, sxauwsk wrote: > In case of xspi work in busy condition, may send bytes failed. > once something wrong, spi controller did't work any more > > My test found this situation appear in both of read/write process. > so when TX FIFO is full, add one byte delay before send data; This looks sensible but doesn't seem to apply against current code, please check and resend. > /* When xspi in busy condition, bytes may send failed, > - * caused communication failure so add one byte delay > + * then spi control did't work thoroughly, add one byte delay >*/ > - usleep_range(10, 20); > + if (cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET) & > + CDNS_SPI_IXR_TXFULL_MASK) > + usleep_range(10, 20); It looks like this may have been sent based on a previous version of your patch, not against the driver as it is now. signature.asc Description: PGP signature
Re: [PATCH] [PATCH v1] spi: cadence: Add usleep_range() for cdns_spi_fill_tx_fifo()
On Mon, Apr 16, 2018 at 02:46:40PM +0800, sxauwsk wrote: > In case of xspi work in busy condition, may send bytes failed. > once something wrong, spi controller did't work any more > > My test found this situation appear in both of read/write process. > so when TX FIFO is full, add one byte delay before send data; This looks sensible but doesn't seem to apply against current code, please check and resend. > /* When xspi in busy condition, bytes may send failed, > - * caused communication failure so add one byte delay > + * then spi control did't work thoroughly, add one byte delay >*/ > - usleep_range(10, 20); > + if (cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET) & > + CDNS_SPI_IXR_TXFULL_MASK) > + usleep_range(10, 20); It looks like this may have been sent based on a previous version of your patch, not against the driver as it is now. signature.asc Description: PGP signature
[PATCH] [PATCH v1] spi: cadence: Add usleep_range() for cdns_spi_fill_tx_fifo()
In case of xspi work in busy condition, may send bytes failed. once something wrong, spi controller did't work any more My test found this situation appear in both of read/write process. so when TX FIFO is full, add one byte delay before send data; Signed-off-by: sxauwskSigned-off-by: guojian Signed-off-by: wangshikai --- drivers/spi/spi-cadence.c |6 -- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c index 66ae055..9694042 100644 --- a/drivers/spi/spi-cadence.c +++ b/drivers/spi/spi-cadence.c @@ -315,9 +315,11 @@ static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi) (xspi->tx_bytes > 0)) { /* When xspi in busy condition, bytes may send failed, -* caused communication failure so add one byte delay +* then spi control did't work thoroughly, add one byte delay */ - usleep_range(10, 20); + if (cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET) & + CDNS_SPI_IXR_TXFULL_MASK) + usleep_range(10, 20); if (xspi->txbuf) cdns_spi_write(xspi, CDNS_SPI_TXD, *xspi->txbuf++); -- 1.7.9.5
[PATCH] [PATCH v1] spi: cadence: Add usleep_range() for cdns_spi_fill_tx_fifo()
In case of xspi work in busy condition, may send bytes failed. once something wrong, spi controller did't work any more My test found this situation appear in both of read/write process. so when TX FIFO is full, add one byte delay before send data; Signed-off-by: sxauwsk Signed-off-by: guojian Signed-off-by: wangshikai --- drivers/spi/spi-cadence.c |6 -- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c index 66ae055..9694042 100644 --- a/drivers/spi/spi-cadence.c +++ b/drivers/spi/spi-cadence.c @@ -315,9 +315,11 @@ static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi) (xspi->tx_bytes > 0)) { /* When xspi in busy condition, bytes may send failed, -* caused communication failure so add one byte delay +* then spi control did't work thoroughly, add one byte delay */ - usleep_range(10, 20); + if (cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET) & + CDNS_SPI_IXR_TXFULL_MASK) + usleep_range(10, 20); if (xspi->txbuf) cdns_spi_write(xspi, CDNS_SPI_TXD, *xspi->txbuf++); -- 1.7.9.5