kernel/linux.git/drivers/tty/serial/mcf.c, branch v6.1.168

tty: mcf: MCF54418 has 10 UARTS

2024-07-05T07:31:56+00:00

commit 7c92a8bd53f24d50c8cf4aba53bb75505b382fed upstream. Most of the colfires have up to 5 UARTs but MCF54418 has up-to 10 ! Change the maximum value authorized. Signed-off-by: Jean-Michel Hautbois Cc: stable Fixes: 2545cf6e94b4 ("m68knommu: allow 4 coldfire serial ports") Link: https://lore.kernel.org/r/20240620-upstream-uart-v1-1-a9d0d95fb19e@yoseli.org Signed-off-by: Greg Kroah-Hartman

serial: Make ->set_termios() old ktermios const

2022-08-30T12:22:35+00:00

There should be no reason to adjust old ktermios which is going to get discarded anyway. Reviewed-by: Andy Shevchenko Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220816115739.10928-7-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: Embed rs485_supported to uart_port

2022-07-08T13:14:09+00:00

Embed rs485_supported to uart_port to allow serial core to tweak it as needed. Reviewed-by: Lino Sanfilippo Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220704094515.6831-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: take termios_rwsem for ->rs485_config() & pass termios as param

2022-06-27T12:44:20+00:00

To be able to alter ADDRB within ->rs485_config(), take termios_rwsem before calling ->rs485_config() and pass termios. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220624204210.11112-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: mcf: Remove serial_rs485 assignment

2022-06-10T11:49:58+00:00

Serial core handles serial_rs485 assignment. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220606100433.13793-35-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: mcf: Fill in rs485_supported

2022-06-10T11:49:56+00:00

Add information on supported serial_rs485 features. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220606100433.13793-19-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: mcf: use helpers in mcf_tx_chars()

2022-01-26T13:55:14+00:00

Use uart_circ_empty() instead of open-coding it via xmit->head & tail. Use preexisting mcf_stop_tx() to avoid stop-tx code duplication. Signed-off-by: Jiri Slaby Link: https://lore.kernel.org/r/20220124071430.14907-12-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman

serial: mcf: drop low-latency workaround

2021-04-22T10:09:25+00:00

Commit 5275ad70fed3 ("tty: serial: mcf: drop uart_port->lock before calling tty_flip_buffer_push()") claimed to address a locking issue but only provided a dubious lockdep splat from an unrelated driver, which in the end turned out to be due a broken local change carried by the author. Unfortunately these patches were merged before the issue had been analysed properly so the commit messages makes no sense whatsoever. The real issue was first seen on RT which at the time effectively always set the low_latency flag for all serial drivers by patching tty_flip_buffer_push(). This in turn revealed that many drivers did not handle the infamous low_latency behaviour which meant that data was pushed immediately to the line discipline instead of being deferred to a work queue. Since commit a9c3f68f3cd8 ("tty: Fix low_latency BUG"), tty_flip_buffer_push() always schedules a work item to push data to the line discipline and there's no need to keep any low_latency hacks around. Link: https://lore.kernel.org/linux-serial/cover.1376923198.git.viresh.kumar@linaro.org/ Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20210421095509.3024-14-johan@kernel.org Signed-off-by: Greg Kroah-Hartman

serial: mcf: add sysrq capability

2020-10-05T11:32:30+00:00

After some unsuccessful attempts to use sysrq over console, figured out that port->has_sysrq should likely be enabled, as per other architectures, this when CONFIG_SERIAL_MCF_CONSOLE is also enabled. Tested some magic sysrq commands (h, p, t, b), they works now properly. Commands works inside 5 secs after BREAK is sent, as expected. Signed-off-by: Angelo Dureghello Link: https://lore.kernel.org/r/20201002140545.477481-1-angelo.dureghello@timesys.com Signed-off-by: Greg Kroah-Hartman

tty: serial: Remove redundant license text

2017-11-08T12:08:12+00:00

Now that the SPDX tag is in all tty files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Jiri Slaby Cc: Eric Anholt Cc: Stefan Wahren Cc: Florian Fainelli Cc: Ray Jui Cc: Scott Branden Cc: bcm-kernel-feedback-list@broadcom.com Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Joachim Eastwood Cc: Matthias Brugger Cc: Masahiro Yamada Cc: Tobias Klauser Cc: Russell King Cc: Vineet Gupta Cc: Richard Genoud Cc: Alexander Shiyan Cc: Baruch Siach Cc: Pat Gefre Cc: "Guilherme G. Piccoli" Cc: Jason Wessel Cc: Vladimir Zapolskiy Cc: Sylvain Lemieux Cc: Carlo Caione Cc: Kevin Hilman Cc: Liviu Dudau Cc: Sudeep Holla Cc: Lorenzo Pieralisi Cc: Andy Gross Cc: David Brown Cc: "Andreas Färber" Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Kevin Cernekee Cc: Laxman Dewangan Cc: Thierry Reding Cc: Jonathan Hunter Cc: Barry Song Cc: Patrice Chotard Cc: Maxime Coquelin Cc: Alexandre Torgue Cc: Chris Metcalf Cc: Peter Korsgaard Cc: Timur Tabi Cc: Tony Prisk Cc: Michal Simek Cc: "Sören Brinkmann" Signed-off-by: Greg Kroah-Hartman