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.riba...@gmail.com>
---
drivers/spi/spi-xilinx.c | 7 +++++++
1 file changed, 7 insertions(+)
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);
--
2.1.4
--
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