ARM: 6158/2: PL011 baudrate extension for ST-Ericssons derivative
Implementation of the ST-Ericsson baudrate extension in the PL011
block. In this modified variant it is possible to change the
sampling factor from 16 to 8, and thanks to this we can get higher
baudrates while still using the same peripheral clock.
Also replace the simple division to determine the baud divisor
with DIV_ROUND_CLOSEST() rather than a simple integer division.
Cc: Alessandro Rubini <rubini@unipv.it>
Cc: Jerzy Kasenberg <jerzy.kasenberg@tieto.com>
Signed-off-by: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h
index 93c96a6..e1b634b 100644
--- a/include/linux/amba/serial.h
+++ b/include/linux/amba/serial.h
@@ -86,6 +86,7 @@
#define UART010_CR_TIE 0x0020
#define UART010_CR_RIE 0x0010
#define UART010_CR_MSIE 0x0008
+#define ST_UART011_CR_OVSFACT 0x0008 /* Oversampling factor */
#define UART01x_CR_IIRLP 0x0004 /* SIR low power mode */
#define UART01x_CR_SIREN 0x0002 /* SIR enable */
#define UART01x_CR_UARTEN 0x0001 /* UART enable */