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def90f4239
linux/drivers/tty/serial
History
Shreshtha Kumar Sahu def90f4239 amba pl011: workaround for uart registers lockup 
This workaround aims to break the deadlock situation
which raises during continuous transfer of data for long
duration over uart with hardware flow control. It is
observed that CTS interrupt cannot be cleared in uart
interrupt register (ICR). Hence further transfer over
uart gets blocked.

It is seen that during such deadlock condition ICR
don't get cleared even on multiple write. This leads
pass_counter to decrease and finally reach zero. This
can be taken as trigger point to run this UART_BT_WA.

Workaround backups the register configuration, does soft
reset of UART using BIT-0 of PRCC_K_SOFTRST_SET/CLEAR
registers and restores the registers.

This patch also provides support for uart init and exit
function calls if present.

Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-08 15:09:23 -07:00
..
cpm_uart tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
jsm Fix common misspellings 2011-03-31 11:26:23 -03:00
8250_accent.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_acorn.c
8250_boca.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_early.c
8250_exar_st16c554.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_fourport.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_gsc.c
8250_hp300.c
8250_hub6.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_mca.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250_pci.c 8250_pci Add EEH support to the 8250 driver for IBM/Digi PCIe 2-port Adapter 2011-06-07 09:42:05 -07:00
8250_pnp.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
8250.c tty/serial: Fix XSCALE serial ports, e.g. ce4100 2011-07-01 15:35:46 -07:00
8250.h tty/serial: Add explicit PORT_TEGRA type 2011-05-19 16:51:01 -07:00
21285.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
68328serial.c arch, mm: filter disallowed nodes from arch specific show_mem functions 2011-05-25 08:39:03 -07:00
68328serial.h
68360serial.c Merge 2.6.38-rc6 into tty-next 2011-02-24 11:36:31 -08:00
altera_jtaguart.c Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-03-16 17:28:10 -07:00
altera_uart.c serial: altera_uart: Scan for a free port if platform device id is -1 2011-04-19 16:31:19 -07:00
amba-pl010.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
amba-pl011.c amba pl011: workaround for uart registers lockup 2011-07-08 15:09:23 -07:00
apbuart.c sparc32,leon: Fixed APBUART frequency detection 2011-03-30 04:28:54 -07:00
apbuart.h
atmel_serial.c atmel_serial: keep the platform_device unchanged 2011-05-25 23:04:33 +08:00
bcm63xx_uart.c
bfin_5xx.c serial: bfin_5xx: fix off-by-one with resource size 2011-07-01 15:35:46 -07:00
bfin_sport_uart.c treewide: cleanup continuations and remove logging message whitespace 2011-04-26 10:24:37 +02:00
bfin_sport_uart.h
clps711x.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
crisv10.c tty: now phase out the ioctl file pointer for good 2011-02-17 11:59:56 -08:00
crisv10.h
dz.c
dz.h
icom.c Fix common misspellings 2011-03-31 11:26:23 -03:00
icom.h
ifx6x60.c Serial: ifx6x60c: Remove duplicate includes of linux/tty.h 2011-04-19 16:33:37 -07:00
ifx6x60.h serial: ifx6x60: minor cleanup 2011-02-17 11:16:15 -08:00
imx.c Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-05-23 12:23:20 -07:00
ioc3_serial.c
ioc4_serial.c
ip22zilog.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ip22zilog.h
Kconfig SERIAL: SC26xx: Fix link error. 2011-07-01 15:38:03 -07:00
kgdboc.c kgdboc,kgdbts: strlen() doesn't count the terminator 2011-03-25 16:37:30 -05:00
lantiq.c SERIAL: Lantiq: Add driver for MIPS Lantiq SOCs. 2011-05-19 09:55:43 +01:00
m32r_sio_reg.h
m32r_sio.c m32r: fix spin_lock_irqsave() misuse 2011-05-26 17:12:33 -07:00
m32r_sio.h
Makefile Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-05-23 12:23:20 -07:00
max3100.c workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable' 2011-02-16 17:48:59 +01:00
max3107-aava.c
max3107.c workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable' 2011-02-16 17:48:59 +01:00
max3107.h Fix common misspellings 2011-03-31 11:26:23 -03:00
mcf.c
mfd.c treewide: cleanup continuations and remove logging message whitespace 2011-04-26 10:24:37 +02:00
mpc52xx_uart.c dt/serial: Eliminate users of of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
mpsc.c
mrst_max3110.c serial: mrst_max3110: initialize waitqueue earlier 2011-07-01 15:36:42 -07:00
mrst_max3110.h Fix common misspellings 2011-03-31 11:26:23 -03:00
msm_serial_hs.c Fix common misspellings 2011-03-31 11:26:23 -03:00
msm_serial.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
msm_serial.h tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
msm_smd_tty.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
mux.c
mxs-auart.c Freescale STMP37XX/STMP378X Application UART driver: remove duplicate linux/device.h include 2011-02-15 18:35:42 +01:00
netx-serial.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
nwpserial.c
of_serial.c drivercore: revert addition of of_match to struct device 2011-05-18 12:32:23 -06:00
omap-serial.c Fix common misspellings 2011-03-31 11:26:23 -03:00
pch_uart.c pch_uart: add missing comment about OKI ML7223 2011-07-08 15:09:22 -07:00
pmac_zilog.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
pmac_zilog.h
pnx8xxx_uart.c
pxa.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c24a0.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c2400.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c2410.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c2412.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c2440.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s3c6400.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
s5pv210.c tty: s5pv210: Add delay loop on fifo reset function for UART 2011-07-01 15:36:20 -07:00
sa1100.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
samsung.c tty: serial: samsung.c remove legacy PM code. 2011-07-01 15:38:03 -07:00
samsung.h tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
sb1250-duart.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
sc26xx.c
serial_core.c TTY: serial_core, remove superfluous set_task_state 2011-04-25 14:19:12 -07:00
serial_cs.c pcmcia: Convert pcmcia_device_id declarations to const 2011-05-06 07:46:22 +02:00
serial_ks8695.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
serial_txx9.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
sh-sci.c Merge branch 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2011-05-23 21:24:07 -07:00
sh-sci.h sh: sh-sci: sh7377 and sh73a0 build fixes 2011-05-23 12:41:37 +09:00
sn_console.c Fix common misspellings 2011-03-31 11:26:23 -03:00
suncore.c
suncore.h
sunhv.c dt/serial: Eliminate users of of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
sunsab.c dt/serial: Eliminate users of of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
sunsab.h
sunsu.c dt/serial: Eliminate users of of_platform_{,un}register_driver 2011-02-28 13:22:46 -07:00
sunzilog.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sunzilog.h
timbuart.c
timbuart.h
uartlite.c dt: uartlite: merge platform and of_platform driver bindings 2011-02-28 13:22:43 -07:00
ucc_uart.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-03-18 06:31:43 -07:00
vr41xx_siu.c
vt8500_serial.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
xilinx_uartps.c tty/serial: add support for Xilinx PS UART 2011-05-03 10:26:39 -07:00
zs.c
zs.h