spi: pl022: use DMA by default when probing from DT

In the past we controlled the selection of DMA for a certain
host by a boolean switch in the platform data. Currently
there is no way to enable DMA on a PL022 probed from the
device tree. Let's default to trying to obtain DMA channels
in the DT case, and then we can always fail (and thus fall
back to PIO mode).

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 371cc66f1a0e9d4abfce97b8ee5fe3466cb28ad3..3b246543282f50a21a04397458097135c52693a3 100644 (file)
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -2083,6 +2083,7 @@ pl022_platform_data_dt_get(struct device *dev)
        }
 
        pd->bus_id = -1;
+       pd->enable_dma = 1;
        of_property_read_u32(np, "num-cs", &tmp);
        pd->num_chipselect = tmp;
        of_property_read_u32(np, "pl022,autosuspend-delay",