serial: mxs: remove the MXS_AUART_DMA_CONFIG

The MXS_AUART_DMA_CONFIG is originally used to check if the DT node
is configured with the DMA property.

But now, the MXS_AUART_DMA_CONFIG is set unconditionally in the
serial_mxs_probe_dt(), so the check in the mxs_auart_settermios() is
not necessary anymore. This patch removes this macro.

Signed-off-by: Huang Shijie <[email protected]>
Acked-by: Shawn Guo <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index eac7b585bc0c6fc144952334782dc3bba7805c25..10e9d70b5c4066fced345848f592dc11582c1cfb 100644 (file)
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -133,7 +133,6 @@ enum mxs_auart_type {
 struct mxs_auart_port {
        struct uart_port port;
 
-#define MXS_AUART_DMA_CONFIG   0x1
 #define MXS_AUART_DMA_ENABLED  0x2
 #define MXS_AUART_DMA_TX_SYNC  2  /* bit 2 */
 #define MXS_AUART_DMA_RX_READY 3  /* bit 3 */
@@ -640,7 +639,7 @@ static void mxs_auart_settermios(struct uart_port *u,
                 * we can only implement the DMA support for auart
                 * in mx28.
                 */
-               if (is_imx28_auart(s) && (s->flags & MXS_AUART_DMA_CONFIG)
+               if (is_imx28_auart(s)
                                && test_bit(MXS_AUART_RTSCTS, &s->flags)) {
                        if (!mxs_auart_dma_init(s))
                                /* enable DMA tranfer */
@@ -1009,8 +1008,6 @@ static int serial_mxs_probe_dt(struct mxs_auart_port *s,
        }
        s->port.line = ret;
 
-       s->flags |= MXS_AUART_DMA_CONFIG;
-
        if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
                set_bit(MXS_AUART_RTSCTS, &s->flags);