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path: root/drivers/spi/spi-xilinx.c
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Diffstat (limited to 'drivers/spi/spi-xilinx.c')
-rw-r--r--drivers/spi/spi-xilinx.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index fb56fcfdf65e..09a942852593 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -233,6 +233,21 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
return 0;
}
+static int xilinx_spi_setup(struct spi_device *spi)
+{
+ /* always return 0, we can not check the number of bits.
+ * There are cases when SPI setup is called before any driver is
+ * there, in that case the SPI core defaults to 8 bits, which we
+ * do not support in some cases. But if we return an error, the
+ * SPI device would not be registered and no driver can get hold of it
+ * When the driver is there, it will call SPI setup again with the
+ * correct number of bits per transfer.
+ * If a driver setups with the wrong bit number, it will fail when
+ * it tries to do a transfer
+ */
+ return 0;
+}
+
static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi)
{
u8 sr;
@@ -360,6 +375,7 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
xspi->bitbang.chipselect = xilinx_spi_chipselect;
xspi->bitbang.setup_transfer = xilinx_spi_setup_transfer;
xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs;
+ xspi->bitbang.master->setup = xilinx_spi_setup;
init_completion(&xspi->done);
if (!request_mem_region(mem->start, resource_size(mem),