- 05 Mar, 2024 6 commits
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Andy Shevchenko authored
Since we have now a common helper to read port properties use it instead of sparse home grown solution. Reviewed-by:
Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by:
Andrew Jeffery <andrew@codeconstruct.com.au> Link: https://lore.kernel.org/r/20240304123035.758700-5-andriy.shevchenko@linux.intel.comSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Andy Shevchenko authored
Several serial drivers want to read the same or similar set of the port properties. Make a common helper for them. Signed-off-by:
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Andy Shevchenko authored
In some APIs we would like to assign the special value to iotype and compare against it in another places. Introduce UPIO_UNKNOWN for this purpose. Note, we can't use 0, because it's a valid value for IO port access. Signed-off-by:
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Andy Shevchenko authored
Currently it's not crystal clear what UPIO_* and UPQ_* definitions belong to. Reindent the code, so it will be easy to read and understand. No functional changes intended. Reviewed-by:
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Geert Uytterhoeven authored
Unlike the 8250 serial driver complex, the sh-sci driver uses only a single pair of functions to read and write serial port registers. Hence there is no need to incur the overhead of calling them through indirection, like the serial_port_{in,out}() wrappers do. Replace all calls to these wrappers by direct calls to sci_serial_{in,out}(). Remove the setup of the uart_port.serial_{in,out}() callbacks. After removal of all calls to serial_port_{in,out}() in the sh-sci driver, the only remaining user is uart_xchar_out(), which the sh-sci driver does not use. Signed-off-by:Geert Uytterhoeven <geert+renesas@glider.be> Acked-by:
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/51e79d601cb9d9d63822d3773d3cf05a96868612.1709548811.git.geert+renesas@glider.beSigned-off-by:
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Jonas Gorski authored
If the circular buffer is empty, it just means we fit all characters to send into the HW fifo, but not that the hardware finished transmitting them. So if we immediately call stop_tx() after that, this may abort any pending characters in the HW fifo, and cause dropped characters on the console. Fix this by only stopping tx when the tx HW fifo is actually empty. Fixes: 8275b48b ("tty: serial: introduce transmit helpers") Cc: stable@vger.kernel.org Signed-off-by:
Jonas Gorski <jonas.gorski@gmail.com> Link: https://lore.kernel.org/r/20240303150807.68117-1-jonas.gorski@gmail.comSigned-off-by:
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- 02 Mar, 2024 33 commits
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://lore.kernel.org/r/20240301215246.891055-19-bigeasy@linutronix.deSigned-off-by:
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Sebastian Andrzej Siewior authored
The struct eg20t_port has a spinlock_t which is used for locking while access I/O of the device. Then there is the uart_portlock which is sometimes and nests within eg20t_port's lock. The uart_port lock is not used while using the struct in pch_uart_hal_read() which might be okay. Then both locks are used in pch_console_write() which looks odd especially the double try_lock part. All in all it looks like the uart_port's lock could replace eg20t_port's lock and simplify the code. Remove eg20t_port::lock and use uart_port's lock for the lock scope. Signed-off-by:
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Sebastian Andrzej Siewior authored
There is no need to directly initialize the spinlock_t in struct uart_port. The structure is later passed to uart_add_one_port() which initialize the complete struct including the lock member. Remove spin_lock_init() on uart_port's internal lock. Signed-off-by:
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Sebastian Andrzej Siewior authored
The interrupt service routine is always invoked with disabled interrupts. Remove the _irqsave() from the locking functions in the interrupts service routine/ pch_uart_interrupt(). Signed-off-by:
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Sebastian Andrzej Siewior authored
push_rx() returns always 0. Make push_rx() return void. Signed-off-by:
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Sebastian Andrzej Siewior authored
handle_rx() is only a wrapper around handle_rx_to() without any additional functionality. Invoke handle_rx_to() directly and remove handle_rx(). Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Handle sysrq requests sysrq once the port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-riscv@lists.infradead.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Handle sysrq requests sysrq once the port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-unisoc@lists.infradead.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Handle sysrq requests sysrq once the port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Andreas Färber <afaerber@suse.de> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-actions@lists.infradead.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Handle sysrq requests sysrq once the port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Hammer Hsieh <hammerh0314@gmail.com> Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Bjorn Andersson <andersson@kernel.org> Cc: Konrad Dybcio <konrad.dybcio@linaro.org> Cc: linux-arm-msm@vger.kernel.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Kevin Hilman <khilman@baylibre.com> Cc: Jerome Brunet <jbrunet@baylibre.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-amlogic@lists.infradead.org Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Signed-off-by:
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Sebastian Andrzej Siewior authored
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT. The driver splits the locking function into two parts: local_irq_save() and uart_port_lock() and this breaks PREEMPT_RT. Delay handling sysrq until port lock is dropped. Remove the special case in the console write routine an always use the complete locking function. Cc: Russell King <linux@armlinux.org.uk> Signed-off-by:
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Uwe Kleine-König authored
Instead of silently giving up, at least tell what the problem is. Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by:
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Raphael Gallais-Pou authored
'clocks' property is required regarding the device. Convert st,asc binding to DT schema format in order to add this property, and update example. Signed-off-by:
Raphael Gallais-Pou <rgallaispou@gmail.com> Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240226152135.8671-1-rgallaispou@gmail.comSigned-off-by:
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Serge Semin authored
The serial8250_update_uartclk() body was created based on the several method calls copied from the serial8250_do_set_termios() function. Seeing aside with some other things the later method can update the baud rate based on the new reference clock let's just call it instead thus simplifying the code a bit. Suggested-by:
Serge Semin <fancer.lancer@gmail.com> Reviewed-by:
Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20240222145058.28307-1-fancer.lancer@gmail.comSigned-off-by:
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Bartosz Golaszewski authored
Since commit 1f2bcb8c ("gpio: protect the descriptor label with SRCU") gpiod_set_consumer_name() calls synchronize_srcu() which led to a "sleeping in atomic context" smatch warning. This function (along with gpiod_get/put() and all other GPIO APIs apart from gpiod_get/set_value() and gpiod_direction_input/output()) should have never been called with a spinlock taken. We're only fixing this now as GPIOLIB has been rebuilt to use SRCU for access serialization which uncovered this problem. Move the calls to gpiod_get/put() outside the spinlock critical section. Reported-by:
Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/linux-gpio/deee1438-efc1-47c4-8d80-0ab2cf01d60a@moroto.mountain/Signed-off-by:
Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by:
Patrice Chotard <patrice.chotard@foss.st.com> Link: https://lore.kernel.org/r/20240220113410.16613-1-brgl@bgdev.plSigned-off-by:
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Tamseel Shams authored
Currently for platforms which passes UART fifosize from DT gets override by local driver structure "s3c24xx_serial_drv_data", which is not intended. Change the code to honor fifosize from device tree at first. Signed-off-by:
Tamseel Shams <m.shams@samsung.com> Link: https://lore.kernel.org/r/20240220101227.80741-1-m.shams@samsung.comSigned-off-by:
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Thomas Huth authored
Compiling a kernel for the ColdFire causes a compiler warning: drivers/tty/serial/mcf.c:473:12: warning: no previous prototype for ‘early_mcf_setup’ [-Wmissing-prototypes] 473 | int __init early_mcf_setup(struct mcf_platform_uart *platp) | ^~~~~~~~~~~~~~~ This function seems to be completely unused, so let's remove it to silence the warning. Signed-off-by:Thomas Huth <thuth@redhat.com> Reviewed-by:
Jiri Slaby <jirislaby@kernel.org> Acked-by:
Greg Ungerer <gerg@linux-m68k.org> Reviewed-by:
Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/r/20240219164002.520342-1-thuth@redhat.comSigned-off-by:
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Andy Shevchenko authored
We are not supposed to spread quirks in 8250_port module especially when we have a separate driver for the hardware in question. Move quirk from generic module to the driver that uses it. While at it, move IO to ->set_divisor() callback as it has to be from day 1. ->get_divisor() is not supposed to perform any IO as UART port: - might not be powered on - is not locked by a spin lock Fixes: 1ed67ecd ("8250: microchip: Add 4 Mbps support in PCI1XXXX UART") Signed-off-by:
Rengarajan S <rengarajan.s@microchip.com> Link: https://lore.kernel.org/r/20240219162917.2159736-1-andriy.shevchenko@linux.intel.comSigned-off-by:
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Andy Shevchenko authored
Update header inclusions to follow IWYU (Include What You Use) principle. Signed-off-by:
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Andy Shevchenko authored
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:
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Andy Shevchenko authored
SIMPLE_DEV_PM_OPS() is deprecated, replace it with DEFINE_SIMPLE_DEV_PM_OPS() and use pm_sleep_ptr() for setting the driver's PM routines. We can now remove the __maybe_unused qualifier in the suspend and resume functions. Signed-off-by:
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Andy Shevchenko authored
Use generic function to set firmware node instead of ACPI specific one. Signed-off-by:
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Andy Shevchenko authored
While now there is no issue if IRQ is fired before we clearing the interrupts as the handler does the same, but strictly speaking it might be problematic if IRQ handler wants to do something more. Move clearing interrupt code to be called before registering the IRQ handler. Signed-off-by:
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Andy Shevchenko authored
PM callbacks take struct device pointer as a parameter, use dev_get_drvdata() to retrieve it instead of unneeded double loop of referencing via pci_get_drvdata(to_pci_dev(dev)). Signed-off-by:
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Andy Shevchenko authored
It seems a copy&paste mistake that suspend callback removes the GPIO device. There is no counterpart of this action, means once suspended there is no more GPIO device available untile full unbind-bind cycle is performed. Remove suspicious GPIO device removal in suspend. Fixes: d0aeaa83 ("serial: exar: split out the exar code from 8250_pci") Signed-off-by:
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Greg Kroah-Hartman authored
Merge tag 'w1-drv-6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-w1 into tty-next Krzysztof writes: 1-Wire bus drivers for v6.9 1. Few cleanups: constifying, convert platform remove callback returning void. 2. Add UART 1-Wire bus driver which uses UART interface to create the 1-Wire timing patterns. * tag 'w1-drv-6.9' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-w1: w1: w1-gpio: Convert to platform remove callback returning void w1: sgi_w1: Convert to platform remove callback returning void w1: omap_hdq: Convert to platform remove callback returning void w1: mxc_w1: Convert to platform remove callback returning void w1: add UART w1 bus driver dt-bindings: w1: UART 1-Wire bus dt-bindings: serial: allow onewire as child node w1: make w1_bus_type const
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- 27 Feb, 2024 1 commit
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Greg Kroah-Hartman authored
We need the tty/serial fixes in here as well. Signed-off-by:
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