linux/drivers/tty
Tony Lindgren 6a00decce3 serial: 8250_omap: Handle optional overrun-throttle-ms property
[ Upstream commit 1fe0e1fa32 ]

Handle optional overrun-throttle-ms property as done for 8250_fsl in commit
6d7f677a2a ("serial: 8250: Rate limit serial port rx interrupts during
input overruns"). This can be used to rate limit the UART interrupts on
noisy lines that end up producing messages like the following:

ttyS ttyS2: 4 input overrun(s)

At least on droid4, the multiplexed USB and UART port is left to UART mode
by the bootloader for a debug console, and if a USB charger is connected
on boot, we get noise on the UART until the PMIC related drivers for PHY
and charger are loaded.

With this patch and overrun-throttle-ms = <500> we avoid the extra rx
interrupts.

Cc: Carl Philipp Klemm <philipp@uvos.xyz>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210727103533.51547-2-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-18 13:40:25 +02:00
..
hvc hvsi: don't panic on tty_register_driver failure 2021-09-18 13:40:22 +02:00
ipwireless
serdev
serial serial: 8250_omap: Handle optional overrun-throttle-ms property 2021-09-18 13:40:25 +02:00
vt vt_kdsetmode: extend console locking 2021-09-03 10:09:28 +02:00
amiserial.c tty: amiserial: fix TIOCSSERIAL permission check 2021-05-14 09:49:55 +02:00
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c tty: moxa: fix TIOCSSERIAL permission check 2021-05-14 09:49:56 +02:00
moxa.h
mxser.c
mxser.h
n_gsm.c tty: n_gsm: check error while registering tty devices 2021-05-11 14:47:21 +02:00
n_hdlc.c
n_null.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: teach the n_tty ICANON case about the new "cookie continuations" too 2021-03-07 12:34:16 +01:00
nozomi.c tty: nozomi: Fix the error handling path of 'nozomi_card_init()' 2021-07-14 16:56:39 +02:00
pty.c
rocket_int.h
rocket.c
rocket.h
synclink_gt.c
synclink.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_baudrate.c
tty_buffer.c
tty_io.c tty: Fix data race between tiocsti() and flush_to_ldisc() 2021-09-15 09:50:47 +02:00
tty_ioctl.c tty: fix return value for unsupported termiox ioctls 2021-05-14 09:50:19 +02:00
tty_jobctrl.c
tty_ldisc.c
tty_ldsem.c
tty_mutex.c
tty_port.c
ttynull.c
vcc.c