| Message ID | 1422029330-10971-17-git-send-email-ricardo.ribalda@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Jan 23, 2015 at 05:08:48PM +0100, Ricardo Ribalda Delgado wrote: > If the core had some data on the buffer, the size detection could show > up a smaller size than real, affecting performance. This should've been part of your earlier patch.
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 704613c..8c25c59 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -295,6 +295,13 @@ static int xilinx_spi_find_buffer_size(struct xilinx_spi *xspi) u8 sr; int n_words = 0; + /* + * Before the buffer_size detection we reset the core + * to make sure we start with a clean state. + */ + xspi->write_fn(XIPIF_V123B_RESET_MASK, + xspi->regs + XIPIF_V123B_RESETR_OFFSET); + /* Fill the Tx FIFO with as many words as possible */ do { xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET);
If the core had some data on the buffer, the size detection could show up a smaller size than real, affecting performance. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> --- drivers/spi/spi-xilinx.c | 7 +++++++ 1 file changed, 7 insertions(+)