spi: dw-mid: change magic numbers to the constants

Instead of using magic numbers in the code we create a bit map definition of
the DMACR register and use it.

There is no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index ecae30f..7bdf937 100644 (file)
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -124,9 +124,9 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
                dw_writew(dws, DW_SPI_DMARDLR, 0xf);
                dw_writew(dws, DW_SPI_DMATDLR, 0x10);
                if (dws->tx_dma)
-                       dma_ctrl |= 0x2;
+                       dma_ctrl |= SPI_DMA_TDMAE;
                if (dws->rx_dma)
-                       dma_ctrl |= 0x1;
+                       dma_ctrl |= SPI_DMA_RDMAE;
                dw_writew(dws, DW_SPI_DMACR, dma_ctrl);
                spi_enable_chip(dws, 1);
        }

diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 089fc4b..83a103a 100644 (file)
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -74,6 +74,10 @@
 #define SPI_INT_RXFI                   (1 << 4)
 #define SPI_INT_MSTI                   (1 << 5)
 
+/* Bit fields in DMACR */
+#define SPI_DMA_RDMAE                  (1 << 0)
+#define SPI_DMA_TDMAE                  (1 << 1)
+
 /* TX RX interrupt level threshold, max can be 256 */
 #define SPI_INT_THRESHOLD              32