Remy Bohmer 1ecc26bd27 atmel_serial: split the interrupt handler ... Split up the interrupt handler of the serial port into a interrupt top-half and a tasklet. The goal is to get the interrupt top-half as short as possible to minimize latencies on interrupts. But the old code also does some calls in the interrupt handler that are not allowed on preempt-RT in IRQF_NODELAY context. This handler is executed in this context because of the interrupt sharing with the timer interrupt. The timer interrupt on Preempt-RT runs in IRQF_NODELAY context. The tasklet takes care of handling control status changes, pushing incoming characters to the tty layer, handling break and other errors. It also handles pushing TX data into the data register. Reading the complete receive queue is still done in the top-half because we never want to miss any incoming character. [hskinnemoen@atmel.com: misc cleanups and simplifications] Signed-off-by: Remy Bohmer <linux@bohmer.net> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Andrew Victor <linux@maxim.org.za> Tested-by: Marc Pignat <marc.pignat@hevs.ch> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-08 09:22:37 -08:00
..
cpm_uart	Remove pointless casts from void pointers	2008-02-06 10:41:01 -08:00
jsm	jsm: Remove further unneeded crud	2007-10-17 08:42:52 -07:00
8250_accent.c
8250_acorn.c
8250_au1x00.c
8250_boca.c
8250_early.c	8250_early: coding style	2008-02-08 09:22:25 -08:00
8250_exar_st16c554.c
8250_fourport.c
8250_gsc.c	8250_gsc: coding style	2008-02-08 09:22:25 -08:00
8250_hp300.c	8250_hp300: coding style	2008-02-08 09:22:25 -08:00
8250_hub6.c	8250_hub6: codding style	2008-02-08 09:22:25 -08:00
8250_mca.c
8250_pci.c	8250_pci: coding style	2008-02-08 09:22:25 -08:00
8250_pnp.c	serial: Coding style	2008-02-05 09:44:10 -08:00
8250.c	8250: enable rate reporting via termios	2008-02-08 09:22:25 -08:00
8250.h
21285.c	[ARM] 21285 serial: fix build error	2008-02-04 13:14:06 +00:00
68328serial.c	Char: char/serial, remove SERIAL_TYPE_NORMAL redefines	2008-02-07 08:42:33 -08:00
68328serial.h
68360serial.c	68360serial: remove broken optimisation	2007-07-16 09:05:51 -07:00
amba-pl010.c
amba-pl011.c	amba-pl011, rename BIT macro	2007-10-19 11:53:42 -07:00
atmel_serial.c	atmel_serial: split the interrupt handler	2008-02-08 09:22:37 -08:00
bfin_5xx.c	[Blackfin] arch: set_bfin_dma_config shouldnt set SYNC or RESTART by default - add argument or option	2008-01-22 15:29:18 +08:00
clps711x.c
crisv10.c	Char: char/serial, remove SERIAL_TYPE_NORMAL redefines	2008-02-07 08:42:33 -08:00
crisv10.h	CRISv10 serial driver rewrite	2007-11-14 18:45:46 -08:00
dz.c	dz.c: Resource management	2008-02-07 08:42:24 -08:00
dz.h	dz: clean up and improve the setup of termios settings	2008-02-07 08:42:24 -08:00
icom.c	kobject: convert icom to use kref, not kobject	2008-01-24 20:40:09 -08:00
icom.h	Coding style fix drivers/serial/icom.h	2008-02-03 14:47:38 +02:00
imx.c	Remove pointless casts from void pointers	2008-02-06 10:41:01 -08:00
ioc3_serial.c
ioc4_serial.c
ip22zilog.c	IP22ZILOG: fix lockup and sysrq	2007-11-29 09:24:53 -08:00
ip22zilog.h
Kconfig	Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc	2008-02-07 09:02:26 -08:00
m32r_sio_reg.h
m32r_sio.c	m32r: serial: remove M32R_SIO_SHARE_IRQS	2007-10-16 09:43:04 -07:00
m32r_sio.h	m32r: serial: remove M32R_SIO_SHARE_IRQS	2007-10-16 09:43:04 -07:00
Makefile	SC26XX: New serial driver for SC2681 uarts	2008-02-06 10:41:06 -08:00
mcf.c	m68knommu: use ARRAY_SIZE in ColdFire serial driver	2008-02-05 09:44:21 -08:00
mcfserial.c
mcfserial.h
mpc52xx_uart.c	[POWERPC] mpc52xx: fix compile error introduce when rebasing patch	2008-02-06 22:29:25 -07:00
mpsc.c	serial: MPSC: set baudrate when BRG divider is set.	2008-02-05 09:44:10 -08:00
mux.c	drivers/serial/: Spelling fixes	2008-02-03 17:29:25 +02:00
netx-serial.c
of_serial.c
pmac_zilog.c	[POWERPC] Optionally use new device number for pmac_zilog	2007-09-22 14:49:21 +10:00
pmac_zilog.h
pnx8xxx_uart.c
pxa.c	[ARM] 4662/1: Fix PXA serial driver compilation if SERIAL_PXA_CONSOLE is disabled	2007-11-26 14:39:12 +00:00
s3c2410.c	drivers/serial/s3c2410.c: remove dead config symbols	2008-02-05 09:44:09 -08:00
sa1100.c
sb1250-duart.c	BCM1480 serial build fix	2007-09-11 17:21:19 -07:00
sc26xx.c	SC26XX: New serial driver for SC2681 uarts	2008-02-06 10:41:06 -08:00
serial_core.c	serial_core: bring mostly into line with coding style	2008-02-08 09:22:25 -08:00
serial_cs.c	pcmcia: replace kio_addr_t with unsigned int everywhere	2008-02-05 09:44:08 -08:00
serial_ks8695.c
serial_lh7a40x.c
serial_txx9.c	serial: fix serial_txx9 console initialization	2007-10-30 08:06:55 -07:00
sh-sci.c	sh: Add support for SH7763 CPU subtype.	2008-01-28 13:19:02 +09:00
sh-sci.h	sh: Add support for SH7763 CPU subtype.	2008-01-28 13:19:02 +09:00
sn_console.c	sn_console section mismatch warning	2007-07-16 09:05:53 -07:00
suncore.c	[SERIAL]: Fix section mismatches in Sun serial console drivers.	2007-12-29 01:19:49 -08:00
suncore.h	[SERIAL] sparc: Infrastructure to fix section mismatch bugs.	2007-12-12 07:36:34 -08:00
sunhv.c	[SERIAL] sparc: Infrastructure to fix section mismatch bugs.	2007-12-12 07:36:34 -08:00
sunsab.c	[SERIAL] sparc: Infrastructure to fix section mismatch bugs.	2007-12-12 07:36:34 -08:00
sunsab.h
sunsu.c	[SERIAL] sparc: Infrastructure to fix section mismatch bugs.	2007-12-12 07:36:34 -08:00
sunzilog.c	[SERIAL] sparc: Infrastructure to fix section mismatch bugs.	2007-12-12 07:36:34 -08:00
sunzilog.h
uartlite.c	Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc	2008-02-07 09:02:26 -08:00
ucc_uart.c	[POWERPC] qe-uart: add support for Freescale QUICCEngine UART	2008-01-23 19:34:12 -06:00
v850e_uart.c
vr41xx_siu.c	serial: fix vr41xx_siu serial console support	2007-07-31 15:39:41 -07:00
zs.c	zs: move to the serial subsystem	2007-07-18 08:38:22 -07:00
zs.h	zs: move to the serial subsystem	2007-07-18 08:38:22 -07:00