linux.git/drivers/tty/serial/Kconfig, branch v6.17

serial: sh-sci: Add support for RZ/T2H SCI

2025-07-09T11:45:30+00:00

Define a new RSCI port type, and the RSCI 32 bits registers set.
The RZ/T2H SCI has a a fifo, and a quite different set of registers
from the original SH SCI ones.
DMA is not supported yet.

Signed-off-by: Thierry Bultel 
Signed-off-by: Lad Prabhakar 
Reviewed-by: Wolfram Sang 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20250630202323.279809-6-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman

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

2025-02-14T09:06:50+00:00

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 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20250213125612.4705-3-kkartik@nvidia.com
Signed-off-by: Greg Kroah-Hartman

Revert "tty/serial: Add kgdb_nmi driver"

2025-02-14T09:05:43+00:00

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/1348522080-32629-9-git-send-email-anton.vorontsov@linaro.org/

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

tty: serial: atmel: make it selectable for ARCH_LAN969X

2025-01-10T15:06:57+00:00

LAN969x uses the Atmel serial, so make it selectable for ARCH_LAN969X.

Signed-off-by: Robert Marko 
Acked-by: Nicolas Ferre 
Link: https://lore.kernel.org/r/20250108131045.40642-3-robert.marko@sartura.hr
Signed-off-by: Greg Kroah-Hartman

tty: serial: handle HAS_IOPORT dependencies

2024-10-28T21:44:28+00:00

In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
compile time. We thus need to add HAS_IOPORT as dependency for those
drivers using them unconditionally. Some 8250 serial drivers support
MMIO only use, so fence only the parts requiring I/O ports and print an
error message if a device can't be supported with the current
configuration.

Co-developed-by: Arnd Bergmann 
Signed-off-by: Arnd Bergmann 
Acked-by: Greg Kroah-Hartman 
Reviewed-by: Maciej W. Rozycki 
Signed-off-by: Niklas Schnelle 
Signed-off-by: Arnd Bergmann

serial: sc16is7xx: re-add Kconfig SPI or I2C dependency

2024-06-04T12:10:28+00:00

Commit d49216438139
("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
removed Kconfig SPI_MASTER or I2C dependency for SERIAL_SC16IS7XX (core).
This removal was done because I inadvertently misinterpreted some review
comments.

Because of that, the driver question now pops up if both I2C and
SPI_MASTER are disabled.

Re-add Kconfig SPI_MASTER or I2C dependency to fix the problem.

Suggested-by: Geert Uytterhoeven 
Fixes: d49216438139 ("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
Signed-off-by: Hugo Villeneuve 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20240603152601.3689319-3-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman

serial: sc16is7xx: rename Kconfig CONFIG_SERIAL_SC16IS7XX_CORE

2024-06-04T12:10:28+00:00

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 
Fixes: d49216438139 ("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
Signed-off-by: Hugo Villeneuve 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/20240603152601.3689319-2-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman

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

2024-04-11T12:08:08+00:00

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 
Signed-off-by: Hugo Villeneuve 
Link: https://lore.kernel.org/r/20240409154253.3043822-4-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman

serial: max3100: Update Kconfig entry

2024-04-09T13:51:52+00:00

The driver actually supports more than one chip.
Update Kconfig entry to list the supported chips.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20240402195306.269276-17-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

Merge tag 'riscv-for-linus-6.8-mw4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2024-01-20T19:06:04+00:00

Pull more RISC-V updates from Palmer Dabbelt:

 - Support for tuning for systems with fast misaligned accesses.

 - Support for SBI-based suspend.

 - Support for the new SBI debug console extension.

 - The T-Head CMOs now use PA-based flushes.

 - Support for enabling the V extension in kernel code.

 - Optimized IP checksum routines.

 - Various ftrace improvements.

 - Support for archrandom, which depends on the Zkr extension.

 - The build is no longer broken under NET=n, KUNIT=y for ports that
   don't define their own ipv6 checksum.

* tag 'riscv-for-linus-6.8-mw4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (56 commits)
  lib: checksum: Fix build with CONFIG_NET=n
  riscv: lib: Check if output in asm goto supported
  riscv: Fix build error on rv32 + XIP
  riscv: optimize ELF relocation function in riscv
  RISC-V: Implement archrandom when Zkr is available
  riscv: Optimize hweight API with Zbb extension
  riscv: add dependency among Image(.gz), loader(.bin), and vmlinuz.efi
  samples: ftrace: Add RISC-V support for SAMPLE_FTRACE_DIRECT[_MULTI]
  riscv: ftrace: Add DYNAMIC_FTRACE_WITH_DIRECT_CALLS support
  riscv: ftrace: Make function graph use ftrace directly
  riscv: select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
  lib/Kconfig.debug: Update AS_HAS_NON_CONST_LEB128 comment and name
  riscv: Restrict DWARF5 when building with LLVM to known working versions
  riscv: Hoist linker relaxation disabling logic into Kconfig
  kunit: Add tests for csum_ipv6_magic and ip_fast_csum
  riscv: Add checksum library
  riscv: Add checksum header
  riscv: Add static key for misaligned accesses
  asm-generic: Improve csum_fold
  RISC-V: selftests: cbo: Ensure asm operands match constraints
  ...