serial: imx: Rename register fields to match newer reference manuals

Only the reference manual for the i.MX1 (I have MC9328MX1RM/D Rev 5 from
2004) uses TDMAEN and RDMAEN for these. All reference manuals for the
newer chips use TXDMAEN and RXDMAEN. Update to the newer name with the
assumption that most imx users don't use an imx1 any more.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -71,12 +71,12 @@
 #define UCR1_IDEN	(1<<12) /* Idle condition interrupt */
 #define UCR1_ICD_REG(x) (((x) & 3) << 10) /* idle condition detect */
 #define UCR1_RRDYEN	(1<<9)	/* Recv ready interrupt enable */
-#define UCR1_RDMAEN	(1<<8)	/* Recv ready DMA enable */
+#define UCR1_RXDMAEN	(1<<8)	/* Recv ready DMA enable */
 #define UCR1_IREN	(1<<7)	/* Infrared interface enable */
 #define UCR1_TXMPTYEN	(1<<6)	/* Transimitter empty interrupt enable */
 #define UCR1_RTSDEN	(1<<5)	/* RTS delta interrupt enable */
 #define UCR1_SNDBRK	(1<<4)	/* Send break */
-#define UCR1_TDMAEN	(1<<3)	/* Transmitter ready DMA enable */
+#define UCR1_TXDMAEN	(1<<3)	/* Transmitter ready DMA enable */
 #define IMX1_UCR1_UARTCLKEN (1<<2) /* UART clock enabled, i.mx1 only */
 #define UCR1_ATDMAEN    (1<<2)  /* Aging DMA Timer Enable */
 #define UCR1_DOZE	(1<<1)	/* Doze */
@@ -441,7 +441,7 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
 		temp = readl(sport->port.membase + UCR1);
 		temp &= ~UCR1_TXMPTYEN;
 		if (sport->dma_is_txing) {
-			temp |= UCR1_TDMAEN;
+			temp |= UCR1_TXDMAEN;
 			writel(temp, sport->port.membase + UCR1);
 		} else {
 			writel(temp, sport->port.membase + UCR1);
@@ -481,7 +481,7 @@ static void dma_tx_callback(void *data)
 	dma_unmap_sg(sport->port.dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE);
 
 	temp = readl(sport->port.membase + UCR1);
-	temp &= ~UCR1_TDMAEN;
+	temp &= ~UCR1_TXDMAEN;
 	writel(temp, sport->port.membase + UCR1);
 
 	/* update the stat */
@@ -547,7 +547,7 @@ static void imx_dma_tx(struct imx_port *sport)
 			uart_circ_chars_pending(xmit));
 
 	temp = readl(sport->port.membase + UCR1);
-	temp |= UCR1_TDMAEN;
+	temp |= UCR1_TXDMAEN;
 	writel(temp, sport->port.membase + UCR1);
 
 	/* fire it */
@@ -591,7 +591,7 @@ static void imx_start_tx(struct uart_port *port)
 			/* We have X-char to send, so enable TX IRQ and
 			 * disable TX DMA to let TX interrupt to send X-char */
 			temp = readl(sport->port.membase + UCR1);
-			temp &= ~UCR1_TDMAEN;
+			temp &= ~UCR1_TXDMAEN;
 			temp |= UCR1_TXMPTYEN;
 			writel(temp, sport->port.membase + UCR1);
 			return;
@@ -1177,7 +1177,7 @@ static void imx_enable_dma(struct imx_port *sport)
 
 	/* set UCR1 */
 	temp = readl(sport->port.membase + UCR1);
-	temp |= UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN;
+	temp |= UCR1_RXDMAEN | UCR1_TXDMAEN | UCR1_ATDMAEN;
 	writel(temp, sport->port.membase + UCR1);
 
 	imx_setup_ufcr(sport, TXTL_DMA, RXTL_DMA);
@@ -1191,7 +1191,7 @@ static void imx_disable_dma(struct imx_port *sport)
 
 	/* clear UCR1 */
 	temp = readl(sport->port.membase + UCR1);
-	temp &= ~(UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN);
+	temp &= ~(UCR1_RXDMAEN | UCR1_TXDMAEN | UCR1_ATDMAEN);
 	writel(temp, sport->port.membase + UCR1);
 
 	/* clear UCR2 */
@@ -1380,7 +1380,7 @@ static void imx_flush_buffer(struct uart_port *port)
 		dma_unmap_sg(sport->port.dev, sgl, sport->dma_tx_nents,
 			     DMA_TO_DEVICE);
 		temp = readl(sport->port.membase + UCR1);
-		temp &= ~UCR1_TDMAEN;
+		temp &= ~UCR1_TXDMAEN;
 		writel(temp, sport->port.membase + UCR1);
 		sport->dma_is_txing = 0;
 	}