diff options
Diffstat (limited to 'drivers/spi/spi-mem.c')
| -rw-r--r-- | drivers/spi/spi-mem.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 37f4443ce9a0..86e6597bc3dc 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -173,11 +173,20 @@ EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); bool spi_mem_default_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) - return false; + struct spi_controller *ctlr = mem->spi->controller; + bool op_is_dtr = + op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr; - if (op->cmd.nbytes != 1) - return false; + if (op_is_dtr) { + if (!spi_mem_controller_is_capable(ctlr, dtr)) + return false; + + if (op->cmd.nbytes != 2) + return false; + } else { + if (op->cmd.nbytes != 1) + return false; + } return spi_mem_check_buswidth(mem, op); } |