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b7639b0b15
android_kernel_samsung_sm8650/drivers/tty
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Joshua Scott b7639b0b15 serial: 8250_dw: Limit dw8250_tx_wait_empty quirk to armada-38x devices 
The previous implementation has had a detrimental effect on devices using
high bitrates (bluetooth), as the fifo being non-empty for a single check
would result in a 10 µs delay.

Limit the change to devices with the new "marvell,armada-38x-uart"
compatible string. Also update the code to allow the first 1000 retries
to not perform a delay.

The maximum duration of retries has been increased to cover a worst-case
seen on the Armada 385 SoC. "dmesg ; resize", will fill the buffer with
text to output before doing a resize. At 9600 baud this took up to 13 ms
to flush all characters and avoid some getting lost.

Signed-off-by: Joshua Scott <joshua.scott@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-23 10:11:13 +02:00
..
hvc TTY/Serial driver patches for 4.17-rc1 2018-04-04 18:43:49 -07:00
ipwireless treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
serdev serdev: Fix typo in serdev_device_alloc 2018-03-14 15:02:45 +01:00
serial serial: 8250_dw: Limit dw8250_tx_wait_empty quirk to armada-38x devices 2018-04-23 10:11:13 +02:00
vt TTY/Serial driver patches for 4.17-rc1 2018-04-04 18:43:49 -07:00
amiserial.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
cyclades.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
ehv_bytechan.c tty: ehv_bytechan: fix spelling mistake 2017-11-08 14:27:10 +01:00
goldfish.c tty: goldfish: Enable 'earlycon' only if built-in 2017-12-15 20:27:44 +01:00
isicom.c tty/isicom: Fix a possible sleep-in-atomic bug in WaitTillCardIsFree 2017-12-15 20:24:14 +01:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-09 09:04:10 -07:00
Makefile tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers 2018-03-26 15:57:24 +02:00
mips_ejtag_fdc.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
moxa.c tty: moxa: Add support for CMSPAR 2017-11-28 15:32:33 +01:00
moxa.h tty: moxa: Add support for CMSPAR 2017-11-28 15:32:33 +01:00
mxser.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
mxser.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
n_gsm.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_hdlc.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_null.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_r3964.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_tracerouter.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tracesink.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tracesink.h tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tty.c tty: make n_tty_read() always abort if hangup is in progress 2018-02-28 13:21:10 +01:00
nozomi.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
pty.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rocket_int.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rocket.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
rocket.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
synclink_gt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
synclink.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
synclinkmp.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
sysrq.c fs: add ksys_sync() helper; remove in-kernel calls to sys_sync() 2018-04-02 20:16:05 +02:00
tty_audit.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
tty_baudrate.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_buffer.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_io.c tty: make n_tty_read() always abort if hangup is in progress 2018-02-28 13:21:10 +01:00
tty_ioctl.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_jobctrl.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_ldisc.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
tty_ldsem.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
tty_mutex.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tty_port.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
vcc.c tty: vcc: Convert timers to use timer_setup() 2017-11-04 12:01:54 +01:00