kernel/drivers/tty/serial/8250/Kconfig, branch linux-6.9.y

serial: 8250_exar: Use 8250 PCI library to map and assign resources

2024-03-02T20:52:06Z

8250 PCI library provides a common code to map and assign resources. Use it in order to deduplicate existing code and support IO port variants. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20240219150627.2101198-7-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2023-11-04T01:44:25Z

Pull tty and serial updates from Greg KH: "Here is the big set of tty/serial driver changes for 6.7-rc1. Included in here are: - console/vgacon cleanups and removals from Arnd - tty core and n_tty cleanups from Jiri - lots of 8250 driver updates and cleanups - sc16is7xx serial driver updates - dt binding updates - first set of port lock wrapers from Thomas for the printk fixes coming in future releases - other small serial and tty core cleanups and updates All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (193 commits) serdev: Replace custom code with device_match_acpi_handle() serdev: Simplify devm_serdev_device_open() function serdev: Make use of device_set_node() tty: n_gsm: add copyright Siemens Mobility GmbH tty: n_gsm: fix race condition in status line change on dead connections serial: core: Fix runtime PM handling for pending tx vgacon: fix mips/sibyte build regression dt-bindings: serial: drop unsupported samsung bindings tty: serial: samsung: drop earlycon support for unsupported platforms tty: 8250: Add note for PX-835 tty: 8250: Fix IS-200 PCI ID comment tty: 8250: Add Brainboxes Oxford Semiconductor-based quirks tty: 8250: Add support for Intashield IX cards tty: 8250: Add support for additional Brainboxes PX cards tty: 8250: Fix up PX-803/PX-857 tty: 8250: Fix port count of PX-257 tty: 8250: Add support for Intashield IS-100 tty: 8250: Add support for Brainboxes UP cards tty: 8250: Add support for additional Brainboxes UC cards tty: 8250: Remove UC-257 and UC-431 ...

tty: serial: 8250_exar: Does not use anything from 8250_pci

2023-09-18T09:14:43Z

8250_exar includes linux/8250_pci.h and depends on SERIAL_8250_PCI. Neither is necessary so this patch removes the include and changes the depends on to SERIAL_8250 && PCI (taken from SERIAL_8250_PCI). Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230915094336.13278-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

arch: Remove Itanium (IA-64) architecture

2023-09-11T08:13:17Z

The Itanium architecture is obsolete, and an informal survey [0] reveals that any residual use of Itanium hardware in production is mostly HP-UX or OpenVMS based. The use of Linux on Itanium appears to be limited to enthusiasts that occasionally boot a fresh Linux kernel to see whether things are still working as intended, and perhaps to churn out some distro packages that are rarely used in practice. None of the original companies behind Itanium still produce or support any hardware or software for the architecture, and it is listed as 'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers that contributed on behalf of those companies (nor anyone else, for that matter) have been willing to support or maintain the architecture upstream or even be responsible for applying the odd fix. The Intel firmware team removed all IA-64 support from the Tianocore/EDK2 reference implementation of EFI in 2018. (Itanium is the original architecture for which EFI was developed, and the way Linux supports it deviates significantly from other architectures.) Some distros, such as Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have dropped support years ago. While the argument is being made [1] that there is a 'for the common good' angle to being able to build and run existing projects such as the Grid Community Toolkit [2] on Itanium for interoperability testing, the fact remains that none of those projects are known to be deployed on Linux/ia64, and very few people actually have access to such a system in the first place. Even if there were ways imaginable in which Linux/ia64 could be put to good use today, what matters is whether anyone is actually doing that, and this does not appear to be the case. There are no emulators widely available, and so boot testing Itanium is generally infeasible for ordinary contributors. GCC still supports IA-64 but its compile farm [3] no longer has any IA-64 machines. GLIBC would like to get rid of IA-64 [4] too because it would permit some overdue code cleanups. In summary, the benefits to the ecosystem of having IA-64 be part of it are mostly theoretical, whereas the maintenance overhead of keeping it supported is real. So let's rip off the band aid, and remove the IA-64 arch code entirely. This follows the timeline proposed by the Debian/ia64 maintainer [5], which removes support in a controlled manner, leaving IA-64 in a known good state in the most recent LTS release. Other projects will follow once the kernel support is removed. [0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/ [1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/ [2] https://gridcf.org/gct-docs/latest/index.html [3] https://cfarm.tetaneutral.net/machines/list/ [4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/ [5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/ Acked-by: Tony Luck Signed-off-by: Ard Biesheuvel

serial: 8250: Apply FSL workarounds also without SERIAL_8250_CONSOLE

2023-06-13T10:27:05Z

The need to handle the FSL variant of 8250 in a special way is also present without console support. So soften the dependency for SERIAL_8250_FSL from SERIAL_8250_CONSOLE to SERIAL_8250. To handle SERIAL_8250=m, the FSL code can be modular, too, thus SERIAL_8250_FSL becomes tristate. Compiling 8250_fsl as a module requires adding a module license so this is added, too. While add it also add a appropriate module description. As then SERIAL_OF_PLATFORM=y + SERIAL_8250_FSL=m is a valid combination (if COMPILE_TEST is enabled on a platform that is neither PPC, ARM nor ARM64), the check in 8250_of.c must be weakened a bit. Signed-off-by: Uwe Kleine-König Reviewed-by: Andy Shevchenko Message-ID: <20230609133932.786117-3-u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman

serial: Indicate fintek option may also be required for RS232 support

2023-05-30T10:51:04Z

The current config comment for SERIAL_8250_FINTEK implies that this option is only needed when one wants to support RS485. As it turns out we also need to enable this option for RS232 support to function correctly on some variants. For example for variants such as the F71869AD attempting to use multiple RS232 ports simultaneously without this option enabled can result in data corruption. Signed-off-by: James Hilliard Link: https://lore.kernel.org/r/20230521075046.3539376-1-james.hilliard1@gmail.com Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci1xxxx: Disable SERIAL_8250_PCI1XXXX config by default

2023-03-09T16:08:15Z

Commit 32bb477fa7bf ("serial: 8250_pci1xxxx: Add driver for quad-uart support") made the SERIAL_8250_PCI1XXXX driver enabled when SERIAL_8250 is enabled, disable it as this driver does not need to be enabled by default Fixes: 32bb477fa7bf ("serial: 8250_pci1xxxx: Add driver for quad-uart support") Reported-by: Linus Torvalds Link: https://lore.kernel.org/lkml/CAHk-=whhFCeeuo6vTEmNSx6S-KKkugxgzN_W5Z6v-9yH9gc3Zw@mail.gmail.com/ Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20230305145124.13444-1-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman

serial: 8250: ASPEED_VUART: select REGMAP instead of depending on it

2023-03-09T16:06:49Z

REGMAP is a hidden (not user visible) symbol. Users cannot set it directly thru "make *config", so drivers should select it instead of depending on it if they need it. Consistently using "select" or "depends on" can also help reduce Kconfig circular dependency issues. Therefore, change the use of "depends on REGMAP" to "select REGMAP". Fixes: 8d310c9107a2 ("drivers/tty/serial/8250: Make Aspeed VUART SIRQ polarity configurable") Cc: stable Signed-off-by: Randy Dunlap Cc: Greg Kroah-Hartman Cc: Oskar Senft Cc: linux-serial@vger.kernel.org Link: https://lore.kernel.org/r/20230226053953.4681-9-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci1xxxx: Add driver for quad-uart support

2023-02-08T12:10:15Z

pci1xxxx is a PCIe switch with a multi-function endpoint on one of its downstream ports. Quad-uart is one of the functions in the multi-function endpoint. This driver loads for the quad-uart and enumerates single or multiple instances of uart based on the PCIe subsystem device ID. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20230207164814.3104605-3-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c

2023-02-08T12:10:15Z

Move implementation of setup_port func() to serial8250_pci_setup_port. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Ilpo Järvinen Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20230207164814.3104605-2-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman