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linux/drivers/serial
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Haavard Skinnemoen 4d5e392c33 [PATCH] atmel_serial: Fix roundoff error in atmel_console_get_options 
The atmel_console_get_options() function initializes the baud,
parity and bits settings from the actual hardware setup, in
case it has been initialized by a e.g. boot loader.

The baud rate, however, is not necessarily exactly equal to one of
the standard baud rates (115200, etc.) This means that the baud rate
calculated by this function may be slightly higher or slightly lower
than one of the standard baud rates.

If the baud rate is slightly lower than the target, this causes
problems when uart_set_option() tries to match the detected baud rate
against the standard baud rate, as it will always select a baud rate
that is lower or equal to the target rate. For example if the
detected baud rate is slightly lower than 115200, usart_set_options()
will select 57600.

This patch fixes the problem by subtracting 1 from the value in BRGR
when calculating the baud rate. The detected baud rate will thus
always be higher than the nearest standard baud rate, and
uart_set_options() will end up doing the right thing.

Tested on ATSTK1000 and AT91RM9200-EK boards. Both are broken without
this patch.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04 10:25:06 -07:00
..
cpm_uart Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
jsm [PATCH] irq-flags: serial: Use the new IRQF_ constants 2006-07-02 13:58:53 -07:00
8250_accent.c [SERIAL] Use an enum for serial8250 platform device IDs 2005-09-08 16:04:41 +01:00
8250_acorn.c [PATCH] ioremap balanced with iounmap for drivers/serial/8250_acorn,c 2006-10-01 00:39:32 -07:00
8250_au1x00.c [SERIAL] AMD Alchemy UART: claim memory range 2006-04-30 11:15:58 +01:00
8250_boca.c [SERIAL] Use an enum for serial8250 platform device IDs 2005-09-08 16:04:41 +01:00
8250_early.c [SERIAL] kernel console should send CRLF not LFCR 2006-03-20 20:00:09 +00:00
8250_fourport.c [SERIAL] Use an enum for serial8250 platform device IDs 2005-09-08 16:04:41 +01:00
8250_gsc.c [PARISC] Clean up asm-parisc/serial.h 2006-10-04 06:47:03 -06:00
8250_hp300.c [PATCH] hp300: fix driver_register() return handling, remove dio_module_init() 2006-03-25 08:22:53 -08:00
8250_hub6.c [SERIAL] Use an enum for serial8250 platform device IDs 2005-09-08 16:04:41 +01:00
8250_mca.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
8250_pci.c [SERIAL] CONFIG_PM=n slim: drivers/serial/8250_pci.c 2006-10-01 17:07:08 +01:00
8250_pnp.c [SERIAL] add PNP IDs for FPI based touchscreens 2006-10-01 21:27:15 +01:00
8250.c Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial 2006-10-03 09:13:29 -07:00
8250.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
21285.c fix file specification in comments 2006-10-03 23:01:26 +02:00
68328serial.c [PATCH] const struct tty_operations 2006-10-02 07:57:14 -07:00
68328serial.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
68360serial.c [PATCH] const struct tty_operations 2006-10-02 07:57:14 -07:00
amba-pl010.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
amba-pl011.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
atmel_serial.c [PATCH] atmel_serial: Fix roundoff error in atmel_console_get_options 2006-10-04 10:25:06 -07:00
atmel_serial.h [PATCH] at91_serial -> atmel_serial: Internal names 2006-10-04 10:25:05 -07:00
clps711x.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
crisv10.c [PATCH] const struct tty_operations 2006-10-02 07:57:14 -07:00
crisv10.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
dz.c [SERIAL] dz: Fix compilation error 2006-07-09 21:11:09 +01:00
dz.h
icom.c [PATCH] irq-flags: serial: Use the new IRQF_ constants 2006-07-02 13:58:53 -07:00
icom.h [PATCH] serial/icom: Remove custom msescs_to_jiffies() macro 2005-06-25 16:25:01 -07:00
imx.c [PATCH] irq-flags: serial: Use the new IRQF_ constants 2006-07-02 13:58:53 -07:00
ioc3_serial.c [PATCH] Altix: ioc3 serial support 2006-01-14 18:25:20 -08:00
ioc4_serial.c [PATCH] ioremap balanced with iounmap for drivers/serial/ioc4_serial.c 2006-10-01 00:39:32 -07:00
ip22zilog.c [PATCH] ioremap balanced with iounmap for drivers/serial/ip22zilog.c 2006-10-01 00:39:32 -07:00
ip22zilog.h
Kconfig [PATCH] atmel_serial: Support AVR32 2006-10-04 10:25:06 -07:00
m32r_sio_reg.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
m32r_sio.c [SERIAL] Remove m32r_sio dependency on asm/serial.h 2006-10-01 17:06:03 +01:00
m32r_sio.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
Makefile [PATCH] at91_serial -> atmel_serial: Kconfig symbols 2006-10-04 10:25:05 -07:00
mcfserial.c [PATCH] const struct tty_operations 2006-10-02 07:57:14 -07:00
mcfserial.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
mpc52xx_uart.c [PATCH] ioremap balanced with iounmap for drivers/serial/mpc52xx_uart.c 2006-10-01 00:39:32 -07:00
mpsc.c [PATCH] ioremap balanced with iounmap for drivers/serial/mpsc.c 2006-10-01 00:39:32 -07:00
mux.c [PATCH] ioremap balanced with iounmap for drivers/serial/mux.c 2006-10-01 00:39:32 -07:00
netx-serial.c Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
pmac_zilog.c [POWERPC] powermac: Constify & voidify get_property() 2006-07-31 15:55:05 +10:00
pmac_zilog.h
pxa.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
s3c2410.c [ARM] 3793/1: S3C2412: fix wrong serial info struct 2006-09-18 13:30:17 +01:00
sa1100.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
serial_core.c Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial 2006-10-03 09:13:29 -07:00
serial_cs.c [SERIAL] Fix resume handling bug 2006-10-01 17:14:07 +01:00
serial_lh7a40x.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
serial_txx9.c [SERIAL] suspend/resume handlers don't have level arg anymore 2006-10-01 17:06:54 +01:00
sh-sci.c Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
sh-sci.h Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
sn_console.c [PATCH] irq-flags: serial: Use the new IRQF_ constants 2006-07-02 13:58:53 -07:00
suncore.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
suncore.h
sunhv.c [SERIAL] sunhv: Convert to of_driver layer. 2006-06-30 14:13:38 -07:00
sunsab.c [SERIAL] sunsab: Fix E250 console with RSC. 2006-08-23 15:50:57 -07:00
sunsab.h
sunsu.c [PATCH] ioremap balanced with iounmap for drivers/serial/sunsu.c 2006-10-01 00:39:32 -07:00
sunzilog.c [SERIAL] sunzilog: Mark sunzilog_init_hw as __devinit. 2006-09-29 16:12:43 -07:00
sunzilog.h
v850e_uart.c [PATCH] irq-flags: serial: Use the new IRQF_ constants 2006-07-02 13:58:53 -07:00
vr41xx_siu.c [MIPS] vr41xx: Move IRQ numbers to asm-mips/vr41xx/irq.h 2006-07-13 21:26:19 +01:00