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Diffstat (limited to 'drivers/spi/atmel_spi.c')
-rw-r--r--drivers/spi/atmel_spi.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index ff10808183a3..b09d33678dd8 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -490,9 +490,14 @@ static int atmel_spi_setup(struct spi_device *spi)
if (!(spi->mode & SPI_CPHA))
csr |= SPI_BIT(NCPHA);
- /* TODO: DLYBS and DLYBCT */
- csr |= SPI_BF(DLYBS, 10);
- csr |= SPI_BF(DLYBCT, 10);
+ /* DLYBS is mostly irrelevant since we manage chipselect using GPIOs.
+ *
+ * DLYBCT would add delays between words, slowing down transfers.
+ * It could potentially be useful to cope with DMA bottlenecks, but
+ * in those cases it's probably best to just use a lower bitrate.
+ */
+ csr |= SPI_BF(DLYBS, 0);
+ csr |= SPI_BF(DLYBCT, 0);
/* chipselect must have been muxed as GPIO (e.g. in board setup) */
npcs_pin = (unsigned int)spi->controller_data;