serial: lpuart: Prepare the driver for DM conversion

Create internal routines which take lpuart's register base as
a parameter, in preparation for driver model conversion.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>

drivers/serial/serial_lpuart.c

@@ -50,22 +50,19 @@ DECLARE_GLOBAL_DATA_PTR;
 struct lpuart_fsl *base = (struct lpuart_fsl *)LPUART_BASE;
 
 #ifndef CONFIG_LPUART_32B_REG
-static void lpuart_serial_setbrg(void)
+static void _lpuart_serial_setbrg(struct lpuart_fsl *base, int baudrate)
 {
 	u32 clk = mxc_get_clock(MXC_UART_CLK);
 	u16 sbr;
 
-	if (!gd->baudrate)
+	sbr = (u16)(clk / (16 * baudrate));
-		gd->baudrate = CONFIG_BAUDRATE;
-
-	sbr = (u16)(clk / (16 * gd->baudrate));
 
 	/* place adjustment later - n/32 BRFA */
 	__raw_writeb(sbr >> 8, &base->ubdh);
 	__raw_writeb(sbr & 0xff, &base->ubdl);
 }
 
-static int lpuart_serial_getc(void)
+static int _lpuart_serial_getc(struct lpuart_fsl *base)
 {
 	while (!(__raw_readb(&base->us1) & (US1_RDRF | US1_OR)))
 		WATCHDOG_RESET();
@@ -75,10 +72,10 @@ static int lpuart_serial_getc(void)
 	return __raw_readb(&base->ud);
 }
 
-static void lpuart_serial_putc(const char c)
+static void _lpuart_serial_putc(struct lpuart_fsl *base, const char c)
 {
 	if (c == '\n')
-		lpuart_serial_putc('\r');
+		_lpuart_serial_putc(base, '\r');
 
 	while (!(__raw_readb(&base->us1) & US1_TDRE))
 		WATCHDOG_RESET();
@@ -87,7 +84,7 @@ static void lpuart_serial_putc(const char c)
 }
 
 /* Test whether a character is in the RX buffer */
-static int lpuart_serial_tstc(void)
+static int _lpuart_serial_tstc(struct lpuart_fsl *base)
 {
 	if (__raw_readb(&base->urcfifo) == 0)
 		return 0;
@@ -99,7 +96,7 @@ static int lpuart_serial_tstc(void)
  * Initialise the serial port with the given baudrate. The settings
  * are always 8 data bits, no parity, 1 stop bit, no start bits.
  */
-static int lpuart_serial_init(void)
+static int _lpuart_serial_init(struct lpuart_fsl *base)
 {
 	u8 ctrl;
 
@@ -118,13 +115,38 @@ static int lpuart_serial_init(void)
 	__raw_writeb(CFIFO_TXFLUSH | CFIFO_RXFLUSH, &base->ucfifo);
 
 	/* provide data bits, parity, stop bit, etc */
-	lpuart_serial_setbrg();
+	_lpuart_serial_setbrg(base, gd->baudrate);
 
 	__raw_writeb(UC2_RE | UC2_TE, &base->uc2);
 
 	return 0;
 }
 
+static void lpuart_serial_setbrg(void)
+{
+	_lpuart_serial_setbrg(base, gd->baudrate);
+}
+
+static int lpuart_serial_getc(void)
+{
+	return _lpuart_serial_getc(base);
+}
+
+static void lpuart_serial_putc(const char c)
+{
+	_lpuart_serial_putc(base, c);
+}
+
+static int lpuart_serial_tstc(void)
+{
+	return _lpuart_serial_tstc(base);
+}
+
+static int lpuart_serial_init(void)
+{
+	return _lpuart_serial_init(base);
+}
+
 static struct serial_device lpuart_serial_drv = {
 	.name = "lpuart_serial",
 	.start = lpuart_serial_init,
@@ -136,21 +158,18 @@ static struct serial_device lpuart_serial_drv = {
 	.tstc = lpuart_serial_tstc,
 };
 #else
-static void lpuart32_serial_setbrg(void)
+static void _lpuart32_serial_setbrg(struct lpuart_fsl *base, int baudrate)
 {
 	u32 clk = CONFIG_SYS_CLK_FREQ;
 	u32 sbr;
 
-	if (!gd->baudrate)
+	sbr = (clk / (16 * baudrate));
-		gd->baudrate = CONFIG_BAUDRATE;
-
-	sbr = (clk / (16 * gd->baudrate));
 
 	/* place adjustment later - n/32 BRFA */
 	out_be32(&base->baud, sbr);
 }
 
-static int lpuart32_serial_getc(void)
+static int _lpuart32_serial_getc(struct lpuart_fsl *base)
 {
 	u32 stat;
 
@@ -162,10 +181,10 @@ static int lpuart32_serial_getc(void)
 	return in_be32(&base->data) & 0x3ff;
 }
 
-static void lpuart32_serial_putc(const char c)
+static void _lpuart32_serial_putc(struct lpuart_fsl *base, const char c)
 {
 	if (c == '\n')
-		lpuart32_serial_putc('\r');
+		_lpuart32_serial_putc(base, '\r');
 
 	while (!(in_be32(&base->stat) & STAT_TDRE))
 		WATCHDOG_RESET();
@@ -174,7 +193,7 @@ static void lpuart32_serial_putc(const char c)
 }
 
 /* Test whether a character is in the RX buffer */
-static int lpuart32_serial_tstc(void)
+static int _lpuart32_serial_tstc(struct lpuart_fsl *base)
 {
 	if ((in_be32(&base->water) >> 24) == 0)
 		return 0;
@@ -186,7 +205,7 @@ static int lpuart32_serial_tstc(void)
  * Initialise the serial port with the given baudrate. The settings
  * are always 8 data bits, no parity, 1 stop bit, no start bits.
  */
-static int lpuart32_serial_init(void)
+static int _lpuart32_serial_init(struct lpuart_fsl *base)
 {
 	u8 ctrl;
 
@@ -201,13 +220,38 @@ static int lpuart32_serial_init(void)
 	out_be32(&base->match, 0);
 
 	/* provide data bits, parity, stop bit, etc */
-	lpuart32_serial_setbrg();
+	_lpuart32_serial_setbrg(base, gd->baudrate);
 
 	out_be32(&base->ctrl, CTRL_RE | CTRL_TE);
 
 	return 0;
 }
 
+static void lpuart32_serial_setbrg(void)
+{
+	_lpuart32_serial_setbrg(base, gd->baudrate);
+}
+
+static int lpuart32_serial_getc(void)
+{
+	return _lpuart32_serial_getc(base);
+}
+
+static void lpuart32_serial_putc(const char c)
+{
+	_lpuart32_serial_putc(base, c);
+}
+
+static int lpuart32_serial_tstc(void)
+{
+	return _lpuart32_serial_tstc(base);
+}
+
+static int lpuart32_serial_init(void)
+{
+	return _lpuart32_serial_init(base);
+}
+
 static struct serial_device lpuart32_serial_drv = {
 	.name = "lpuart32_serial",
 	.start = lpuart32_serial_init,