diff options
Diffstat (limited to 'drivers/spi/spi-mem.c')
| -rw-r--r-- | drivers/spi/spi-mem.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 8e8995fc537..b7eca583595 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -181,8 +181,12 @@ bool spi_mem_dtr_supports_op(struct spi_slave *slave, if (op->dummy.nbytes && op->dummy.buswidth == 8 && op->dummy.nbytes % 2) return false; - if (op->data.dir != SPI_MEM_NO_DATA && - op->dummy.buswidth == 8 && op->data.nbytes % 2) + /* + * Transactions of odd length do not make sense for 8D-8D-8D mode + * because a byte is transferred in just half a cycle. + */ + if (op->data.dir != SPI_MEM_NO_DATA && op->data.dir != SPI_MEM_DATA_IN && + op->data.buswidth == 8 && op->data.nbytes % 2) return false; return spi_mem_check_buswidth(slave, op); |