---

yaml --- r: 175328 b: refs/heads/master c: c934878 h: refs/heads/master v: v3
git-mirror · Dec 11, 2009 · 8531d43 · 8531d43
1 parent bbb2016
commit 8531d43
Show file tree

Hide file tree

Showing 2 changed files with 12 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4c0ebb8057bc335d345c8e205a3e6fd1320be21e
+refs/heads/master: c934878cc09fdd4a06ffa554c5149b11d972456f
diff --git a/trunk/drivers/serial/pxa.c b/trunk/drivers/serial/pxa.c
@@ -438,6 +438,7 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
 	unsigned char cval, fcr = 0;
 	unsigned long flags;
 	unsigned int baud, quot;
+	unsigned int dll;
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
@@ -534,10 +535,18 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
 	else
 		up->mcr &= ~UART_MCR_AFE;
 
-	serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
+	serial_out(up, UART_LCR, cval | UART_LCR_DLAB);	/* set DLAB */
 	serial_out(up, UART_DLL, quot & 0xff);		/* LS of divisor */
+
+	/*
+	 * work around Errata #75 according to Intel(R) PXA27x Processor Family
+	 * Specification Update (Nov 2005)
+	 */
+	dll = serial_in(up, UART_DLL);
+	WARN_ON(dll != (quot & 0xff));
+
 	serial_out(up, UART_DLM, quot >> 8);		/* MS of divisor */
-	serial_out(up, UART_LCR, cval);		/* reset DLAB */
+	serial_out(up, UART_LCR, cval);			/* reset DLAB */
 	up->lcr = cval;					/* Save LCR */
 	serial_pxa_set_mctrl(&up->port, up->port.mctrl);
 	serial_out(up, UART_FCR, fcr);