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linux/drivers/tty/serial
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Rickard x Andersson 4f2debd9c6 tty: serial: imx: Fix broken RS485 
commit 672448ccf9b6a676f96f9352cbf91f4d35f4084a upstream.

When about to transmit the function imx_uart_start_tx is called and in
some RS485 configurations this function will call imx_uart_stop_rx. The
problem is that imx_uart_stop_rx will enable loopback in order to
release the RS485 bus, but when loopback is enabled transmitted data
will just be looped to RX.

This patch fixes the above problem by not enabling loopback when about
to transmit.

This driver now works well when used for RS485 half duplex master
configurations.

Fixes: 79d0224f6bf2 ("tty: serial: imx: Handle RS485 DE signal active high")
Cc: stable <stable@kernel.org>
Signed-off-by: Rickard x Andersson <rickaran@axis.com>
Tested-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Link: https://lore.kernel.org/r/20240221115304.509811-1-rickaran@axis.com
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-04-03 15:19:46 +02:00
..
8250
serial: Lock console when calling into driver before registration
2024-04-03 15:19:31 +02:00
cpm_uart
serial: cpm_uart: Avoid suspicious locking
2023-09-23 11:11:07 +02:00
jsm
drivers: serial: jsm: fix some leaks in probe
2022-09-22 16:11:43 +02:00
21285.c
TTY/Serial driver update for 6.1-rc1
2022-10-07 16:36:24 -07:00
altera_jtaguart.c
tty: serial: do unlock on a common path in altera_jtaguart_console_putc()
2022-09-30 14:58:46 +02:00
altera_uart.c
serial: altera_uart: fix locking in polling mode
2022-12-31 13:32:40 +01:00
amba-pl010.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
amba-pl011.c
serial: amba-pl011: Fix DMA transmission in RS485 mode
2024-03-01 13:26:33 +01:00
apbuart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
apbuart.h
…
ar933x_uart.c
serial: ar933x: Deassert Transmit Enable on ->rs485_config()
2022-09-22 16:43:05 +02:00
arc_uart.c
serial: arc_uart: fix of_iomap leak in arc_serial_probe
2023-05-24 17:32:44 +01:00
atmel_serial.c
serial: atmel: don't enable IRQs prematurely
2023-07-23 13:49:40 +02:00
atmel_serial.h
tty: serial: atmel: Use FIELD_PREP/FIELD_GET
2022-09-22 16:32:25 +02:00
bcm63xx_uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
clps711x.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
digicolor-usart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
dz.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
dz.h
…
earlycon-arm-semihost.c
…
earlycon-riscv-sbi.c
…
earlycon.c
tty: move from strlcpy with unused retval to strscpy
2022-08-30 14:21:59 +02:00
fsl_linflexuart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
fsl_lpuart.c
tty: serial: fsl_lpuart: avoid idle preamble pending if CTS is enabled
2024-04-03 15:19:41 +02:00
icom.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
imx_earlycon.c
…
imx.c
tty: serial: imx: Fix broken RS485
2024-04-03 15:19:46 +02:00
ip22zilog.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
ip22zilog.h
…
Kconfig
serial: cpm_uart: Fix a COMPILE_TEST dependency
2023-06-09 10:34:26 +02:00
kgdb_nmi.c
…
kgdboc.c
serial: kgdboc: Fix typo in comment
2022-06-27 14:37:09 +02:00
lantiq.c
serial: lantiq: add missing interrupt ack
2023-06-21 16:00:57 +02:00
liteuart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
lpc32xx_hs.c
tty: serial: extract tx_ready() from __serial_lpc32xx_tx()
2022-09-22 16:14:08 +02:00
Makefile
serial: remove VR41XX serial driver
2022-07-16 08:16:01 +02:00
max310x.c
serial: max310x: fix NULL pointer dereference in I2C instantiation
2024-04-03 15:19:24 +02:00
max3100.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
mcf.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
men_z135_uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
meson_uart.c
tty: serial: meson: fix hard LOCKUP on crtscts mode
2023-11-28 17:07:08 +00:00
milbeaut_usio.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
mpc52xx_uart.c
tty: serial: switch mpc52xx_uart_int_{r,t}x_chars() to bool
2022-09-22 16:14:08 +02:00
mps2-uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
msm_serial.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
mux.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
mvebu-uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
mxs-auart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
omap-serial.c
serial: omap: do not override settings for RS485 support
2024-01-25 15:27:41 -08:00
owl-uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
pch_uart.c
tty: pcn_uart: fix memory leak with using debugfs_lookup()
2023-03-11 13:55:39 +01:00
pic32_uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
pmac_zilog.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
pmac_zilog.h
serial: pmac_zilog: remove unused uart_pmac_port::termios_cache
2022-05-19 18:23:19 +02:00
pxa.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
qcom_geni_serial.c
serial: qcom-geni: fix opp vote on shutdown
2023-09-06 21:27:01 +01:00
rda-uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
rp2.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sa1100.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
samsung_tty.c
tty: serial: samsung: fix tx_empty() to return TIOCSER_TEMT
2024-03-26 18:20:57 -04:00
sb1250-duart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sc16is7xx.c
serial: sc16is7xx: fix unconditional activation of THRI interrupt
2024-01-31 16:17:10 -08:00
sccnxp.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
serial_core.c
serial: Lock console when calling into driver before registration
2024-04-03 15:19:31 +02:00
serial_mctrl_gpio.c
Documentation: serial: move GPIO kernel-doc to the functions
2022-07-28 10:37:42 +02:00
serial_mctrl_gpio.h
…
serial_txx9.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
serial-tegra.c
serial: tegra: handle clk prepare error in tegra_uart_hw_init()
2023-09-13 09:42:56 +02:00
sh-sci.c
tty: serial: sh-sci: Fix Rx on RZ/G2L SCI
2023-04-13 16:55:28 +02:00
sh-sci.h
…
sifive.c
serial: sifive: Fix sifive_serial_console_setup() section
2023-08-03 10:24:08 +02:00
sprd_serial.c
serial: sprd: Fix DMA buffer leak issue
2023-09-13 09:42:52 +02:00
st-asc.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
stm32-usart.c
serial: stm32: Ignore return value of uart_remove_one_port() in .remove()
2023-08-23 17:52:23 +02:00
stm32-usart.h
serial: stm32: make info structs static to avoid sparse warnings
2022-07-28 10:35:23 +02:00
suncore.c
…
sunhv.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sunplus-uart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sunsab.c
serial: sunsab: Fix error handling in sunsab_init()
2022-12-31 13:32:40 +01:00
sunsab.h
…
sunsu.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sunzilog.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
sunzilog.h
…
tegra-tcu.c
Merge 7e2cd21e02b3 ("Merge tag 'tty-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty") into tty-next
2022-09-25 09:22:13 +02:00
timbuart.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
timbuart.h
…
uartlite.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
ucc_uart.c
serial: ucc_uart: Remove custom frame size calculation
2022-08-30 14:28:33 +02:00
vt8500_serial.c
tty: serial: move and cleanup vt8500_tx_empty()
2022-09-22 16:14:07 +02:00
xilinx_uartps.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
zs.c
serial: Make ->set_termios() old ktermios const
2022-08-30 14:22:35 +02:00
zs.h
…