serial: tegra-utc: Add driver for Tegra UART Trace Controller (UTC)

The Tegra264 SoC supports the UART Trace Controller (UTC), which allows
multiple firmware clients (up to 16) to share a single phy

serial: tegra-utc: Add driver for Tegra UART Trace Controller (UTC)

The Tegra264 SoC supports the UART Trace Controller (UTC), which allows
multiple firmware clients (up to 16) to share a single physical UART.
Each client is provided with its own interrupt and has access to a
128-character wide FIFO for both transmit (TX) and receive (RX)
operations.

Add tegra-utc driver to support Tegra UART Trace Controller (UTC)
client.

Signed-off-by: Kartik Rajput <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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Revert "tty/serial: Add kgdb_nmi driver"

This reverts commit 0c57dfcc6c1d037243c2f8fbf62eab3633326ec0.

The functionality was supoosed to be used by a later patch in the
series that never landed [1]

Revert "tty/serial: Add kgdb_nmi driver"

This reverts commit 0c57dfcc6c1d037243c2f8fbf62eab3633326ec0.

The functionality was supoosed to be used by a later patch in the
series that never landed [1]. Drop it.

NOTE: part of functionality was already reverted by commit
39d0be87438a ("serial: kgdb_nmi: Remove unused knock code"). Also note
that this revert is not a clean revert given code changes that have
happened in the meantime.

It's obvious that nobody is using this code since the two exposed
functions (kgdb_register_nmi_console() and
kgdb_unregister_nmi_console()) are both no-ops if
"arch_kgdb_ops.enable_nmi" is not defined. No architectures define it.

[1] https://lore.kernel.org/lkml/[email protected]/

Signed-off-by: Douglas Anderson <[email protected]>
Acked-by: Andy Shevchenko <[email protected]>
Link: URL [1]
Link: https://lore.kernel.org/r/20250129082535.1.Ia095eac1ae357f87d23e7af2206741f5d40788f1@changeid
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: sc16is7xx: rename Kconfig CONFIG_SERIAL_SC16IS7XX_CORE

Commit d49216438139
("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
renamed SERIAL_SC16IS7XX_CORE by SERIAL_SC16IS7XX.

serial: sc16is7xx: rename Kconfig CONFIG_SERIAL_SC16IS7XX_CORE

Commit d49216438139
("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
renamed SERIAL_SC16IS7XX_CORE by SERIAL_SC16IS7XX. This means that some
configs should have been updated when I submitted the original patch, but
unfortunately they were not. Geert mentioned for example:
arch/mips/configs/cu1??0-neo_defconfig

Rename SERIAL_SC16IS7XX to SERIAL_SC16IS7XX_CORE so that existing configs
will still work correctly.

Suggested-by: Geert Uytterhoeven <[email protected]>
Fixes: d49216438139 ("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
Signed-off-by: Hugo Villeneuve <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: sc16is7xx: split into core and I2C/SPI parts (core)

Split the common code from sc16is7xx driver and move the I2C and SPI bus
parts into interface-specific source files.

sc16is7xx becomes th

serial: sc16is7xx: split into core and I2C/SPI parts (core)

Split the common code from sc16is7xx driver and move the I2C and SPI bus
parts into interface-specific source files.

sc16is7xx becomes the core functions which can support multiple bus
interfaces like I2C and SPI.

No functional changes intended.

Also simplify and improve Kconfig entries.
- Capitalize SPI keyword for consistency
- Display list of supported ICs each on a separate line (and aligned) to
facilitate locating a specific IC model
- Add Manufacturer name at start of description string
- Add UART keyword to description string

Suggested-by: Andy Shevchenko <[email protected]>
Signed-off-by: Hugo Villeneuve <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/tty/serial: add ESP32S3 ACM gadget driver

Add driver for the ACM gadget controller of the Espressif ESP32S3 SoC.
Hardware specification is available at the following URL:

https://www.espr

drivers/tty/serial: add ESP32S3 ACM gadget driver

Add driver for the ACM gadget controller of the Espressif ESP32S3 SoC.
Hardware specification is available at the following URL:

https://www.espressif.com/sites/default/files/documentation/esp32-s3_technical_reference_manual_en.pdf
(Chapter 33 USB Serial/JTAG Controller)

Signed-off-by: Max Filippov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/tty/serial: add driver for the ESP32 UART

Add driver for the UART controllers of the Espressif ESP32 and ESP32S3
SoCs. Hardware specification is available at the following URLs:

https://w

drivers/tty/serial: add driver for the ESP32 UART

Add driver for the UART controllers of the Espressif ESP32 and ESP32S3
SoCs. Hardware specification is available at the following URLs:

https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf
(Chapter 13 UART Controller)
https://www.espressif.com/sites/default/files/documentation/esp32-s3_technical_reference_manual_en.pdf
(Chapter 26 UART Controller)

Signed-off-by: Max Filippov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty/serial: Sort drivers in makefile

Sort drivers in alphabetic order in Makefile to make it easier to find
the correct line. In case the CONFIG and filenames disagree, sort using
the filename (but

tty/serial: Sort drivers in makefile

Sort drivers in alphabetic order in Makefile to make it easier to find
the correct line. In case the CONFIG and filenames disagree, sort using
the filename (but ignoring "serial" prefixes).

Signed-off-by: Ilpo Järvinen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: cpm_uart: Remove cpm_uart/ subdirectory

cpm_uart/ subdirectory only has cpm_uart_core.c and cpm_uart.h now.

Move them up and remove cpm_uart/ directory while renaming
cpm_uart_core.c as cpm

serial: cpm_uart: Remove cpm_uart/ subdirectory

cpm_uart/ subdirectory only has cpm_uart_core.c and cpm_uart.h now.

Move them up and remove cpm_uart/ directory while renaming
cpm_uart_core.c as cpm_uart.c

Signed-off-by: Christophe Leroy <[email protected]>
Link: https://lore.kernel.org/r/9b8b8f89fc386480030f5339abe307541ae436a6.1691068700.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty: serial: Add Nuvoton ma35d1 serial driver support

This adds UART and console driver for Nuvoton ma35d1 Soc.
It supports full-duplex communication, FIFO control, and
hardware flow control.
Comman

tty: serial: Add Nuvoton ma35d1 serial driver support

This adds UART and console driver for Nuvoton ma35d1 Soc.
It supports full-duplex communication, FIFO control, and
hardware flow control.
Command line set "console=ttyNVT0,115200", NVT means
Nuvoton MA35 UART port. The UART driver probe will
create path named "/dev/ttyNVTx".

Signed-off-by: Jacky Huang <[email protected]>
Reviewed-by: Ilpo Järvinen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: core: Start managing serial controllers to enable runtime PM

We want to enable runtime PM for serial port device drivers in a generic
way. To do this, we want to have the serial core layer m

serial: core: Start managing serial controllers to enable runtime PM

We want to enable runtime PM for serial port device drivers in a generic
way. To do this, we want to have the serial core layer manage the
registered physical serial controller devices.

To manage serial controllers, let's set up a struct bus and struct device
for the serial core controller as suggested by Greg and Jiri. The serial
core controller devices are children of the physical serial port device.
The serial core controller device is needed to support multiple different
kind of ports connected to single physical serial port device.

Let's also set up a struct device for the serial core port. The serial
core port instances are children of the serial core controller device.

With the serial core port device we can now flush pending TX on the
runtime PM resume as suggested by Johan.

Suggested-by: Andy Shevchenko <[email protected]>
Suggested-by: Greg Kroah-Hartman <[email protected]>
Suggested-by: Jiri Slaby <[email protected]>
Suggested-by: Johan Hovold <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: 8250: RT288x/Au1xxx code away from core

A non-trivial amount of RT288x/Au1xxx code is encapsulated into
ifdeffery in 8250_port / 8250_early and some if UPIO_AU blocks.
Create a separate file

serial: 8250: RT288x/Au1xxx code away from core

A non-trivial amount of RT288x/Au1xxx code is encapsulated into
ifdeffery in 8250_port / 8250_early and some if UPIO_AU blocks.
Create a separate file from them.

Also handle errors properly in the cases where RT288x/Au1xxx code is
not configured.

It seems that 0x1000 mapsize is likely overkill but I've kept it the
same as previously (the value was shrunk to that value in commit
b2b13cdfd05e ("SERIAL 8250: Fixes for Alchemy UARTs.")). Seemingly, the
driver only needs to access register at 0x28 for the divisor latch.

The Kconfig side is a bit tricky. As SERIAL_8250_RT288X is bool it can
only be =y. It is possible to have SERIAL_8250=m + SERIAL_8250_RT288X=y
which required altering when 8250/ is included or the rt288x would not
be built.

Signed-off-by: Ilpo Järvinen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: Rename earlycon semihost driver

Now that earlycon semihost driver works on RISC-V too, let's use a
much more generic name for the driver.

Signed-off-by: Bin Meng <[email protected]>
Tested-

serial: Rename earlycon semihost driver

Now that earlycon semihost driver works on RISC-V too, let's use a
much more generic name for the driver.

Signed-off-by: Bin Meng <[email protected]>
Tested-by: Sergey Matyukevich <[email protected]>
Acked-by: Palmer Dabbelt <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: remove VR41XX serial driver

Commit d3164e2f3b0a ("MIPS: Remove VR41xx support") removed support
for MIPS VR41xx platform, so remove exclusive drivers for this
platform, too.

Signed-off-by:

serial: remove VR41XX serial driver

Commit d3164e2f3b0a ("MIPS: Remove VR41xx support") removed support
for MIPS VR41xx platform, so remove exclusive drivers for this
platform, too.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: sunplus-uart: Add Sunplus SoC UART Driver

Add Sunplus SoC UART Driver.
SP7021 UART block contains 5 UARTs.
There are UART0~4 that supported in SP7021, the features list as below.
Support Ful

serial: sunplus-uart: Add Sunplus SoC UART Driver

Add Sunplus SoC UART Driver.
SP7021 UART block contains 5 UARTs.
There are UART0~4 that supported in SP7021, the features list as below.
Support Full-duplex communication.
Support data packet length configurable.
Support stop bit number configurable.
Support force break condition.
Support baud rate configurable.
Support error detection and report.
Support RXD Noise Rejection Vote configurable.

UART0 pinout only support TX/RX two pins.
UART1 to UART4 pinout support TX/RX/CTS/RTS four pins.
Normally UART0 used for kernel console, also can be used for normal uart.
Command line set "console=ttySUP0,115200", SUP means Sunplus Uart Port.
UART driver probe will create path named "/dev/ttySUPx".

https://sunplus.atlassian.net/wiki/spaces/doc/pages/1873412290/13.+Universal+Asynchronous+Receiver+Transmitter+UART

Signed-off-by: Hammer Hsieh <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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Revert "tty: serial: Add UART driver for Cortina-Access platform"

This reverts commit b61c8bf4694b5115766849378dcb8787ff54e65e. It never
made it to a public mailing list and still needs some work b

Revert "tty: serial: Add UART driver for Cortina-Access platform"

This reverts commit b61c8bf4694b5115766849378dcb8787ff54e65e. It never
made it to a public mailing list and still needs some work based on the
review comments. So revert it for now.

Reported-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/CAMuHMdXA9-ajoAza2JAW5879ECieMm1dbBbKHgJhDa7=3kWu3w@mail.gmail.com
Cc: Jason Li <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty: serial: Add UART driver for Cortina-Access platform

This driver supports Cortina Access UART IP integrated
in most all CAXXXX line of SoCs. Earlycom is also supported

Signed-off-by: Jason Li <

tty: serial: Add UART driver for Cortina-Access platform

This driver supports Cortina Access UART IP integrated
in most all CAXXXX line of SoCs. Earlycom is also supported

Signed-off-by: Jason Li <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: ifx6x60: Remove driver for deprecated platform

Intel Moorestown and Medfield are quite old Intel Atom based
32-bit platforms, which were in limited use in some Android phones,
tablets and co

serial: ifx6x60: Remove driver for deprecated platform

Intel Moorestown and Medfield are quite old Intel Atom based
32-bit platforms, which were in limited use in some Android phones,
tablets and consumer electronics more than eight years ago.

There are no bugs or problems ever reported outside from Intel
for breaking any of that platforms for years. It seems no real
users exists who run more or less fresh kernel on it. The commit
05f4434bc130 ("ASoC: Intel: remove mfld_machine") also in align
with this theory.

Due to above and to reduce a burden of supporting outdated drivers
we remove the support of outdated platforms completely.

Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: remove sirf prima/atlas driver

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <[email protected]>
Signed-off-by: Arnd Bergmann <

serial: remove sirf prima/atlas driver

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty: serial: Drop unused efm32 serial driver

Support for this machine was just removed, so drop the now unused UART
driver, too.

Signed-off-by: Uwe Kleine-König <[email protected]>
Lin

tty: serial: Drop unused efm32 serial driver

Support for this machine was just removed, so drop the now unused UART
driver, too.

Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/tty/serial: add LiteUART driver

This commit adds driver for the FPGA-based LiteUART serial controller
from LiteX SoC builder.

The current implementation supports LiteUART configured
for 32

drivers/tty/serial: add LiteUART driver

This commit adds driver for the FPGA-based LiteUART serial controller
from LiteX SoC builder.

The current implementation supports LiteUART configured
for 32 bit data width and 8 bit CSR bus width.

It does not support IRQ.

Signed-off-by: Filip Kokosinski <[email protected]>
Signed-off-by: Mateusz Holenko <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Stafford Horne <[email protected]>

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tty: serial: remove pnx8xxx uart driver

Commit 625326ea9c84 ("MIPS: Remove PNX833x alias NXP_STB22x") removed
support for PNX833x, so it's time to remove serial driver, too.

Signed-off-by: Thomas B

tty: serial: remove pnx8xxx uart driver

Commit 625326ea9c84 ("MIPS: Remove PNX833x alias NXP_STB22x") removed
support for PNX833x, so it's time to remove serial driver, too.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty: serial: imx: add dependence and build for earlycon

Add the earlycon dependence and add earlycon Makefile support
to allow to build the driver.

Fixes: 699cc4dfd140 ("tty: serial: imx: add imx e

tty: serial: imx: add dependence and build for earlycon

Add the earlycon dependence and add earlycon Makefile support
to allow to build the driver.

Fixes: 699cc4dfd140 ("tty: serial: imx: add imx earlycon driver")
Signed-off-by: Fugang Duan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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{tty: serial, nand: onenand}: samsung: rename to fix build warning

Any arm config which has 'CONFIG_MTD_ONENAND_SAMSUNG=m' and
'CONFIG_SERIAL_SAMSUNG=m' gives a build warning:

warning: same module

{tty: serial, nand: onenand}: samsung: rename to fix build warning

Any arm config which has 'CONFIG_MTD_ONENAND_SAMSUNG=m' and
'CONFIG_SERIAL_SAMSUNG=m' gives a build warning:

warning: same module names found:
drivers/tty/serial/samsung.ko
drivers/mtd/nand/onenand/samsung.ko

Rename both drivers/tty/serial/samsung.c to
drivers/tty/serial/samsung_tty.c and drivers/mtd/nand/onenand/samsung.c
drivers/mtd/nand/onenand/samsung_mtd.c to fix the warning.

Signed-off-by: Sudip Mukherjee <[email protected]>
Acked-by: Richard Weinberger <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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tty: serial: Add linflexuart driver for S32V234

Introduce support for LINFlex driver, based on:
- the version of Freescale LPUART driver after commit b3e3bf2ef2c7 ("Merge
4.0-rc7 into tty-next");

tty: serial: Add linflexuart driver for S32V234

Introduce support for LINFlex driver, based on:
- the version of Freescale LPUART driver after commit b3e3bf2ef2c7 ("Merge
4.0-rc7 into tty-next");
- commit abf1e0a98083 ("tty: serial: fsl_lpuart: lock port on console
write").
In this basic version, the driver can be tested using initramfs and relies
on the clocks and pin muxing set up by U-Boot.

Remarks concerning the earlycon support:

- LinFlexD does not allow character transmissions in the INIT mode (see
section 47.4.2.1 in the reference manual[1]). Therefore, a mutual
exclusion between the first linflex_setup_watermark/linflex_set_termios
executions and linflex_earlycon_putchar was employed and the characters
normally sent to earlycon during initialization are kept in a buffer and
sent afterwards.

- Empirically, character transmission is also forbidden within the last 1-2
ms before entering the INIT mode, so we use an explicit timeout
(PREINIT_DELAY) between linflex_earlycon_putchar and the first call to
linflex_setup_watermark.

- U-Boot currently uses the UART FIFO mode, while this driver makes the
transition to the buffer mode. Therefore, the earlycon putchar function
matches the U-Boot behavior before initializations and the Linux behavior
after.

[1] https://www.nxp.com/webapp/Download?colCode=S32V234RM

Signed-off-by: Stoica Cosmin-Stefan <[email protected]>
Signed-off-by: Adrian.Nitu <[email protected]>
Signed-off-by: Larisa Grigore <[email protected]>
Signed-off-by: Ana Nedelcu <[email protected]>
Signed-off-by: Mihaela Martinas <[email protected]>
Signed-off-by: Matthew Nunez <[email protected]>
[[email protected]: Reduced for upstreaming and implemented
earlycon support]
Signed-off-by: Stefan-Gabriel Mirea <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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serial: remove ks8695 driver

The platform is getting removed, so there are no more users
of this driver.

Signed-off-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/20190809202749.

serial: remove ks8695 driver

The platform is getting removed, so there are no more users
of this driver.

Signed-off-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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