X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fserial%2Fatmel_serial.c;h=3320bcd92c0a3b54de5b3da4c52a9c1683bb84eb;hb=f7e4217b007d1f73e7e3cf10ba4fea4a608c603f;hp=df45a7ac773f8fd5b7409b64bc4b764480dbe0fa;hpb=902b236c087bf021c94cc21a2b09d928c4156c2b;p=powerpc.git

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index df45a7ac77..3320bcd92c 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -33,12 +33,13 @@
 #include <linux/sysrq.h>
 #include <linux/tty_flip.h>
 #include <linux/platform_device.h>
+#include <linux/atmel_pdc.h>
 
 #include <asm/io.h>
 
 #include <asm/mach/serial_at91.h>
 #include <asm/arch/board.h>
-#include <asm/arch/at91_pdc.h>
+
 #ifdef CONFIG_ARM
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
@@ -483,11 +484,16 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios * termios,
 	unsigned long flags;
 	unsigned int mode, imr, quot, baud;
 
+	/* Get current mode register */
+	mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL | ATMEL_US_NBSTOP | ATMEL_US_PAR);
+
 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
 	quot = uart_get_divisor(port, baud);
 
-	/* Get current mode register */
-	mode = UART_GET_MR(port) & ~(ATMEL_US_CHRL | ATMEL_US_NBSTOP | ATMEL_US_PAR);
+	if (quot > 65535) {		/* BRGR is 16-bit, so switch to slower clock */
+		quot /= 8;
+		mode |= ATMEL_US_USCLKS_MCK_DIV8;
+	}
 
 	/* byte size */
 	switch (termios->c_cflag & CSIZE) {