spi: spi-fsl-qspi: Ensure width is respected in spi-mem operations

[ Upstream commit b0177aca7aea7e8917d4e463334b51facb293d02 ]

Make use of a core helper to ensure the desired width is respected
when calling spi-mem operators.

Otherwise only the SPI controller will be matched with the flash chip,
which might lead to wrong widths. Also consider the width specified by
the user in the device tree.

Fixes: 84d043185dbe ("spi: Add a driver for the Freescale/NXP QuadSPI controller")
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20200114154613.8195-1-michael@walle.cc
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c
index 63c9f7e..43078ba 100644 (file)
--- a/drivers/spi/spi-fsl-qspi.c
+++ b/drivers/spi/spi-fsl-qspi.c
@@ -398,7 +398,7 @@ static bool fsl_qspi_supports_op(struct spi_mem *mem,
            op->data.nbytes > q->devtype_data->txfifo)
                return false;
 
-       return true;
+       return spi_mem_default_supports_op(mem, op);
 }
 
 static void fsl_qspi_prepare_lut(struct fsl_qspi *q,