From: rajanikanth.hv@stericsson.com (Rajanikanth H V)
To: linux-arm-kernel@lists.infradead.org
Subject: tty/serial: Need clarification on Support for 4+M Baudrate
Date: Wed, 11 Jan 2012 17:49:01 +0530 [thread overview]
Message-ID: <20120111121901.GA4034@bnru05> (raw)
Ref:
kernel version 3.0.8
Platform: ARM Based SOC, UART:amba pl011
I have a requirement to interface UART with an external microcontroller
using baud rate above 4Mbps, hence following is my approach to apply
the changes. Can any one review/provide me appropriate approach.
diff --git a/arch/arm/include/asm/termbits.h b/arch/arm/include/asm/termbits.h
index 704135d..556f5fb 100644
--- a/arch/arm/include/asm/termbits.h
+++ b/arch/arm/include/asm/termbits.h
@@ -155,6 +155,8 @@ struct ktermios {
#define B3000000 0010015
#define B3500000 0010016
#define B4000000 0010017
+#define B4050000 0010020
+#define B4800000 0010021
#define CIBAUD 002003600000 /* input baud rate */
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 53f2442..59c0682 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -203,7 +203,7 @@ static const speed_t baud_table[] = {
76800, 153600, 307200, 614400, 921600
#else
500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
- 2500000, 3000000, 3500000, 4000000
+ 2500000, 3000000, 3500000, 4000000, 4050000, 4800000
#endif
};
@@ -213,7 +213,7 @@ static const tcflag_t baud_bits[] = {
B1200, B1800, B2400, B4800, B9600, B19200, B38400,
B57600, B115200, B230400, B460800, B500000, B576000,
B921600, B1000000, B1152000, B1500000, B2000000, B2500000,
- B3000000, B3500000, B4000000
+ B3000000, B3500000, B4000000, B4050000, B4800000
};
#else
static const tcflag_t baud_bits[] = {
diff --git a/include/asm-generic/termbits.h b/include/asm-generic/termbits.h
index 232b478..f71e72f 100644
--- a/include/asm-generic/termbits.h
+++ b/include/asm-generic/termbits.h
@@ -156,6 +156,8 @@ struct ktermios {
#define B3000000 0010015
#define B3500000 0010016
#define B4000000 0010017
+#define B4050000 0010020
+#define B4800000 0010021
#define CIBAUD 002003600000 /* input baud rate */
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
next reply other threads:[~2012-01-11 12:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-11 12:19 Rajanikanth H V [this message]
2012-01-11 12:30 ` tty/serial: Need clarification on Support for 4+M Baudrate Alan Cox
2012-01-12 9:49 ` Rajanikanth H V
2012-01-12 11:49 ` Alan Cox
2012-01-12 14:20 ` Rajanikanth H V
2012-01-12 14:39 ` Alan Cox
2012-01-13 14:36 ` Rajanikanth H V
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