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0aa821d846
android_kernel_samsung_sm8650/drivers/tty
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Stefan Agner 0aa821d846 serial: imx: fix cached UCR2 read on software reset 
To reset the UART the SRST needs be cleared (low active). According
to the documentation the bit will remain active for 4 module clocks
until it is cleared (set to 1).

Hence the real register need to be read in case the cached register
indicates that the SRST bit is zero.

This bug lead to wrong baudrate because the baud rate register got
restored before reset completed in imx_flush_buffer.

Fixes: 3a0ab62f43 ("serial: imx: implement shadow registers for UCRx and UFCR")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-23 09:53:36 +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: imx: fix cached UCR2 read on software reset 2018-04-23 09:53:36 +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 tty: n_gsm: Fix DLCI handling for ADM mode if debug & 2 is not set 2018-04-22 17:34:40 +02:00
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