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1122741 commits

Author SHA1 Message Date
Sergiu Moga f73db49650 tty: serial: atmel: Use FIELD_PREP/FIELD_GET
Convert all open-coded instances of bitfields retrieval/setting
to FIELD_PREP/FIELD_GET where possible.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220922113347.144383-10-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:32:25 +02:00
Sergiu Moga 5e3ce1f261 tty: serial: atmel: Make the driver aware of the existence of GCLK
Previously, the atmel serial driver did not take into account the
possibility of using the more customizable generic clock as its
baudrate generator. Unless there is a Fractional Part available to
increase accuracy, there is a high chance that we may be able to
generate a baudrate closer to the desired one by using the GCLK as the
clock source. Now, depending on the error rate between
the desired baudrate and the actual baudrate, the serial driver will
fallback on the generic clock. The generic clock must be provided
in the DT node of the serial that may need a more flexible clock source.

Furthermore, define the bit that represents the choice of having GCLK
as a baudrate source clock inside the USCLKS bitmask of the Mode Register
of USART IP's.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Link: https://lore.kernel.org/r/20220922113347.144383-9-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:56 +02:00
Sergiu Moga 5644bf1843 tty: serial: atmel: Only divide Clock Divisor if the IP is USART
Make sure that the driver only divides the clock divisor if the
IP handled at that point is USART, since UART IP's do not support
implicit peripheral clock division. Instead, in the case of UART,
go with the highest possible clock divisor.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220922113347.144383-8-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:49 +02:00
Sergiu Moga 1a5a01a1e3 tty: serial: atmel: Separate mode clearing between UART and USART
When clearing the mode of the serial IP inside the atmel_set_termios()
method, make sure that the difference between the bitfields placement
of the UART IP's and USART IP's is taken into account, as some of
them overlap with each other. For example, ATMEL_UA_BRSRCCK overlaps
with ATMEL_US_NBSTOP and ATMEL_US_USCLKS overlaps with ATMEL_UA_FILTER.

Furthermore, add definitions for the Baud Rate Source Clock and the
Filter bitfields of the Mode Register of UART IP's, since they were
missing.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Link: https://lore.kernel.org/r/20220922113347.144383-7-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:42 +02:00
Sergiu Moga 79cb503500 dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock
The Devicetree nodes for FLEXCOM's USART can also have an alternative
clock source for the baudrate generator (other than the peripheral
clock), namely the Generick Clock. Thus make the binding aware of
this clock that someone may place in the clock related
properties of the USART node.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220922113347.144383-6-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:36 +02:00
Sergiu Moga 9e16180080 dt-bindings: serial: atmel,at91-usart: Add SAM9260 compatibles to SAM9X60
Require SAM9260 fallback compatible for SAM9X60, because SAM9X60 is
fully compatible with SAM9260 and Linux driver requires the latter.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220922113347.144383-4-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:18 +02:00
Sergiu Moga b9e947fbf0 dt-bindings: serial: atmel,at91-usart: convert to json-schema
Convert at91 USART DT Binding for Atmel/Microchip SoCs to
json-schema format. Furthermore, move this binding to the
serial directory, since binding directories match hardware,
unlike the driver subsystems which match Linux convention.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220922113347.144383-3-sergiu.moga@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:31:01 +02:00
Sherry Sun 316ae95c17 tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown
lpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can
still occur which in turn tries to access dma apis if lpuart_dma_tx_use
flag is true. At this point since dma is torn down, these dma apis can
abort. Set lpuart_dma_tx_use and the corresponding rx flag
lpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not
accessed after they are relinquished.

Otherwise, when try to kill btattach, kernel may panic. This patch may
fix this issue.
root@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200
^C[   90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP
[   90.189806] Modules linked in: moal(O) mlan(O)
[   90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G           O      5.15.32-06136-g34eecdf2f9e4 #37
[   90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT)
[   90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   90.215470] pc : fsl_edma3_disable_request+0x8/0x60
[   90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c
[   90.225237] sp : ffff800013f0bac0
[   90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800
[   90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00
[   90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000
[   90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000
[   90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[   90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040
[   90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090
[   90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804
[   90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480
[   90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800
[   90.299876] Call trace:
[   90.302321]  fsl_edma3_disable_request+0x8/0x60
[   90.306851]  lpuart_flush_buffer+0x40/0x160
[   90.311037]  uart_flush_buffer+0x88/0x120
[   90.315050]  tty_driver_flush_buffer+0x20/0x30
[   90.319496]  hci_uart_flush+0x44/0x90
[   90.323162]  +0x34/0x12c
[   90.327253]  tty_ldisc_close+0x38/0x70
[   90.331005]  tty_ldisc_release+0xa8/0x190
[   90.335018]  tty_release_struct+0x24/0x8c
[   90.339022]  tty_release+0x3ec/0x4c0
[   90.342593]  __fput+0x70/0x234
[   90.345652]  ____fput+0x14/0x20
[   90.348790]  task_work_run+0x84/0x17c
[   90.352455]  do_exit+0x310/0x96c
[   90.355688]  do_group_exit+0x3c/0xa0
[   90.359259]  __arm64_sys_exit_group+0x1c/0x20
[   90.363609]  invoke_syscall+0x48/0x114
[   90.367362]  el0_svc_common.constprop.0+0xd4/0xfc
[   90.372068]  do_el0_svc+0x2c/0x94
[   90.375379]  el0_svc+0x28/0x80
[   90.378438]  el0t_64_sync_handler+0xa8/0x130
[   90.382711]  el0t_64_sync+0x1a0/0x1a4
[   90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041)
[   90.392467] ---[ end trace 2f60524b4a43f1f6 ]---
[   90.397073] note: btattach[503] exited with preempt_count 1
[   90.402636] Fixing recursive fault but reboot is needed!

Fixes: 6250cc30c4 ("tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx")
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Thara Gopinath <tgopinath@microsoft.com>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20220920111703.1532-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:30:42 +02:00
Ilpo Järvinen 039d492637 serial: 8250: Toggle IER bits on only after irq has been set up
Invoking TIOCVHANGUP on 8250_mid port on Ice Lake-D and then reopening
the port triggers these faults during serial8250_do_startup():

  DMAR: DRHD: handling fault status reg 3
  DMAR: [DMA Write NO_PASID] Request device [00:1a.0] fault addr 0x0 [fault reason 0x05] PTE Write access is not set

If the IRQ hasn't been set up yet, the UART will have zeroes in its MSI
address/data registers. Disabling the IRQ at the interrupt controller
won't stop the UART from performing a DMA write to the address programmed
in its MSI address register (zero) when it wants to signal an interrupt.

The UARTs (in Ice Lake-D) implement PCI 2.1 style MSI without masking
capability, so there is no way to mask the interrupt at the source PCI
function level, except disabling the MSI capability entirely, but that
would cause it to fall back to INTx# assertion, and the PCI specification
prohibits disabling the MSI capability as a way to mask a function's
interrupt service request.

The MSI address register is zeroed by the hangup as the irq is freed.
The interrupt is signalled during serial8250_do_startup() performing a
THRE test that temporarily toggles THRI in IER. The THRE test currently
occurs before UART's irq (and MSI address) is properly set up.

Refactor serial8250_do_startup() such that irq is set up before the
THRE test. The current irq setup code is intermixed with the timer
setup code. As THRE test must be performed prior to the timer setup,
extract it into own function and call it only after the THRE test.

The ->setup_timer() needs to be part of the struct uart_8250_ops in
order to not create circular dependency between 8250 and 8250_base
modules.

Fixes: 40b36daad0 ("[PATCH] 8250 UART backup timer")
Reported-by: Lennert Buytenhek <buytenh@arista.com>
Tested-by: Lennert Buytenhek <buytenh@arista.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220922070005.2965-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:30:14 +02:00
Maciej W. Rozycki 46a8973c4d serial: 8250: Switch UART port flags to using BIT_ULL
Use BIT_ULL rather than encoding bits explicitly where applicable with
UART port flags.  This makes a (__force upf_t) cast redundant, but keep
it for visual consistency with the flags defined in terms of userspace
macros.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2209210007030.41633@angie.orcam.me.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:28:47 +02:00
Maciej W. Rozycki 00b7a4d4ee serial: 8250: Request full 16550A feature probing for OxSemi PCIe devices
Oxford Semiconductor PCIe (Tornado) 950 serial port devices need to
operate in the enhanced mode via the EFR register for the Divide-by-M
N/8 baud rate generator prescaler to be used in their native UART mode.
Otherwise the prescaler is fixed at 1 causing grossly incorrect baud
rates to be programmed.

Accessing the EFR register requires 16550A features to have been probed
for, so request this to happen regardless of SERIAL_8250_16550A_VARIANTS
by setting UPF_FULL_PROBE in port flags.

Fixes: 366f6c955d ("serial: 8250: Add proper clock handling for OxSemi PCIe devices")
Cc: stable@vger.kernel.org # v5.19+
Reported-by: Anders Blomdell <anders.blomdell@control.lth.se>
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2209210005040.41633@angie.orcam.me.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:28:47 +02:00
Maciej W. Rozycki 9906890c89 serial: 8250: Let drivers request full 16550A feature probing
A SERIAL_8250_16550A_VARIANTS configuration option has been recently
defined that lets one request the 8250 driver not to probe for 16550A
device features so as to reduce the driver's device startup time in
virtual machines.

Some actual hardware devices require these features to have been fully
determined however for their driver to work correctly, so define a flag
to let drivers request full 16550A feature probing on a device-by-device
basis if required regardless of the SERIAL_8250_16550A_VARIANTS option
setting chosen.

Fixes: dc56ecb81a ("serial: 8250: Support disabling mdelay-filled probes of 16550A variants")
Cc: stable@vger.kernel.org # v5.6+
Reported-by: Anders Blomdell <anders.blomdell@control.lth.se>
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2209202357520.41633@angie.orcam.me.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:28:47 +02:00
Jiri Slaby 7ef26ab6fe tty: serial: extract serial_omap_put_char() from transmit_chars()
This non-trivial code is doubled in transmit_chars(), so it deserves its
own function. This will make next patches easier.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-8-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:08 +02:00
Jiri Slaby 8ca01f8f70 tty: serial: switch mpc52xx_uart_int_{r,t}x_chars() to bool
mpc52xx_uart_int_rx_chars() returns unsigned int.
mpc52xx_uart_int_tx_chars() returns int.

The both results are binary ORed to the "keepgoing" variable. Unify all
three to bool as the only interesting value is whether we should keep
looping (true/false).

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-7-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:08 +02:00
Jiri Slaby 2a4be3a55c tty: serial: extract tx_ready() from __serial_lpc32xx_tx()
The condition in __serial_lpc32xx_tx()'s loop is barely readable.
Extract it to a separate function. This will make the cleanup in the
next patches easier too.

Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-6-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:08 +02:00
Jiri Slaby 0fbf36bb6a tty: serial: extract lqasc_tx_ready() from lqasc_tx_chars()
The condition in lqasc_tx_chars()'s loop is barely readable. Extract it
to a separate function. This will make the cleanup in the next patches
easier too.

(Put it before lqasc_start_tx(), so that we can use it there later.)

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-5-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:08 +02:00
Jiri Slaby 3af44d9bb0 tty: serial: altera_uart_{r,t}x_chars() need only uart_port
Both altera_uart_{r,t}x_chars() need only uart_port, not altera_uart. So
pass the former from altera_uart_interrupt() directly.

Apart it maybe saves a dereference, this makes the transition of
altera_uart_tx_chars() easier to follow in the next patch.

Cc: Tobias Klauser <tklauser@distanz.ch>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:08 +02:00
Jiri Slaby d9c128117d tty: serial: clean up stop-tx part in altera_uart_tx_chars()
The "stop TX" path in altera_uart_tx_chars() is open-coded, so:
* use uart_circ_empty() to check if the buffer is empty, and
* when true, call altera_uart_stop_tx().

Cc: Tobias Klauser <tklauser@distanz.ch>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-3-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:07 +02:00
Jiri Slaby 0c0bfc6b14 tty: serial: move and cleanup vt8500_tx_empty()
Make vt8500_tx_empty() more readable by introducing a new local variable
and move the function before handle_tx(). That way we can reuse it in
there too.

Cc: <linux-arm-kernel@lists.infradead.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-2-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:14:07 +02:00
наб eef7381d81 tty: hvc: remove HVC_IUCV_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"

This stretches that definition slightly, since it multiplexes it with
the terminal number as a constant offset, but is equivalent

Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/8c8a2c9dfc1bfbe6ef3f3237368e483865fc1c29.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:12:34 +02:00
наб 0e6357c3b6 tty: synclink_gt: remove MGSL_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"

Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/3d82b3c864970cdec6717c56dd906b54e78694d7.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:12:34 +02:00
наб 14f9ed6153 tty: n_hdlc: remove HDLC_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"

Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/c31d228302da3f426cebf6fcff855181a5590a66.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:12:34 +02:00
наб 5052df99d3 tty: remove TTY_DRIVER_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"

Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/723478a270a3858f27843cbec621df4d5d44efcc.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:12:34 +02:00
наб 7a4e0d2c7f tty: remove TTY_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"

Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/476d024cd6b04160a5de381ea2b9856b60088cbd.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:12:34 +02:00
Dan Carpenter 1d5859ef22 drivers: serial: jsm: fix some leaks in probe
This error path needs to unwind instead of just returning directly.

Fixes: 03a8482c17 ("drivers: serial: jsm: Enable support for Digi Classic adapters")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YyxFh1+lOeZ9WfKO@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:11:43 +02:00
Johan Jonker 007b20e9ec dt-bindings: serial: rockchip: add rockchip,rk3128-uart
Add rockchip,rk3128-uart compatible string.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/4f283231-2ed4-202b-0c23-157bce0841ee@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:11:20 +02:00
Lukas Wunner e2752ae3cf serial: omap: Disallow RS-485 if rts-gpio is not specified
The serial-omap driver requires an rts-gpio for RS-485 to work.
Historically it has allowed enabling RS-485 even if no rts-gpio was
specified in the device tree.

That doesn't make any sense, so disable RS-485 on probe if rts-gpio is
missing and disallow user space from enabling it.

Three NULL pointer checks for up->rts_gpiod can be dropped as a result,
simplifying the driver slightly.

Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/f191dcca0d8ea03598c463fc0d3fba8941ff2275.1662888075.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:10:45 +02:00
Gaosheng Cui ed9f4bb396 tty: serial: cpm_uart: remove unused cpm_uart_nr declaration
cpm_uart_nr has been removed since
commit 0b2a2e5b77 ("cpm_uart: Remove !CONFIG_PPC_CPM_NEW_BINDING
code"), so remove it.

Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Link: https://lore.kernel.org/r/20220911093654.3222701-1-cuigaosheng1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:10:44 +02:00
Daniel Starke c22d054f1e tty: n_gsm: add debug bit for user payload
A debug bit to output a complete transmission dump exists. Sometimes only
the user frames are relevant. Add an additional bit which limits the
transmission dump output to user data frames if set.

Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-6-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:05:00 +02:00
Daniel Starke c07da737af tty: n_gsm: name the debug bits
Introduce defines to name the various debug bits used within the code to
improve readability and to make its specific use clear.

Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-5-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:05:00 +02:00
Daniel Starke de640bc6b8 tty: n_gsm: introduce gsm_control_command() function
Move the content of gsm_control_transmit() to a new function
gsm_control_command() with a more generic signature and analog to
gsm_control_reply(). Use this within gsm_control_transmit().

This is needed to simplify upcoming functional additions.

Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-4-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:04:46 +02:00
Daniel Starke 669609cea1 tty: n_gsm: replace use of gsm_read_ea() with gsm_read_ea_val()
Replace the use of gsm_read_ea() with gsm_read_ea_val() where applicable to
improve code readability and avoid errors like in the past. See first link
below for reference.

Link: https://lore.kernel.org/all/20220504081733.3494-1-daniel.starke@siemens.com/
Link: https://lore.kernel.org/all/202208222147.WfFRmf1r-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-3-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:04:46 +02:00
Daniel Starke 796492de01 tty: n_gsm: name gsm tty device minors
Add a macro which defines the possible number of virtual devices for n_gsm
to improve code readability.

Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-2-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:04:46 +02:00
Daniel Starke 19fb0a664f tty: n_gsm: add enumeration for gsm encodings
Add an enumeration for the gsm mux encoding types to improve code
readability and to avoid invalid values. Only two values are defined by the
standard:
- basic option mode
- advanced option mode (uses ISO HDLC standard transparency mechanism)

Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-1-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22 16:04:46 +02:00
Al Viro ccf3a57041 termios: kill uapi termios.h that are identical to generic one
mandatory-y will have the generic picked for architectures that
don't have uapi/asm/termios.h of their own.  ia64, parisc and
s390 ones are identical to generic, so...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxGVXpS2dWoTwoa0@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:35 +02:00
Al Viro 89bbeb7e31 termios: get rid of non-UAPI asm/termios.h
All non-UAPI asm/termios.h consist of include of UAPI counterpart
and, possibly, include of linux/uaccess.h

	The latter can't be simply removed, even though nothing in
linux/termios.h doesn't depend upon it anymore - there are several
places that rely upon that indirect chain of includes to pull
linux/uaccess.h.  So the include needs to be lifted out of there -
we lift into tty_driver.h, serdev.h and places that pull asm/termios.h,
but none of
	* linux/uaccess.h (obvious)
	* net/sock.h (pulls uaccess.h)
	* linux/{tty,tty_driver,serdev}.h (tty.h pulls tty_driver.h)

That leaves us just with the include of UAPI asm/termios.h, which is
what <asm/termios.h> will resolve to if we simply remove non-UAPI header.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDnKvYCHn/ogBUv@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:35 +02:00
Al Viro e7b4c812b9 termios: convert the last (sparc) INIT_C_CC to array
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDnDCR2VRTA3Etp@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:35 +02:00
Al Viro d04f9915fa make generic INIT_C_CC a bit more generic
turn it into an array initializer; then alpha, mips and powerpc
variants fold into it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDm7M6M91gC2RPL@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:35 +02:00
Al Viro 38fc315a73 termios: consolidate values for VDISCARD in INIT_C_CC
On old systems it used to be ^O.  Linux had never actually used
the value, but INIT_C_CC (on i386) did initialize it to ^O;
unfortunately, it had a typo in the comment claiming that to be
^U.  Most of the architectures copied the (correct) definition
along with mistaken comment.  alpha, powerpc and sparc tried
to make the definition match comment.

However, util-linux still resets it to ^O on any architecture,
^O is the historical value, kernel ignores it anyway and finally,
Linus said "Just change everybody to do the same, nobody cares
about VDISCARD".

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmy//MKzs3ye7l@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:34 +02:00
Al Viro c9874d3ffe termios: start unifying non-UAPI parts of asm/termios.h
* new header (linut/termios_internal.h), pulled by the users of those
suckers
* defaults for INIT_C_CC and externs for conversion helpers moved over
there
* remove termios-base.h (empty now)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmptU7dNGZ+/Hn@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:34 +02:00
Al Viro 1d5d668256 termios: uninline conversion helpers
default go into drivers/tty/tty_ioctl.c, unusual - into
arch/*/kernel/termios.c (only alpha and sparc have those).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmeUBHo0s/Ew8b@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:34 +02:00
Vijaya Krishna Nivarthi 408e532e80 tty: serial: qcom-geni-serial: Replace hardcoded icc flags with macros.
In suspend/resume routines, icc flags are hardcoded.

Replace the hardcodes with macros available from header.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Link: https://lore.kernel.org/r/1662564702-7253-1-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-08 08:19:24 +02:00
Greg Kroah-Hartman 35f2e3c267 Merge 6.0-rc4 into tty-next
We need the tty/serial fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-05 07:59:28 +02:00
Linus Torvalds 7e18e42e4b Linux 6.0-rc4 2022-09-04 13:10:01 -07:00
Linus Torvalds 5995497296 powerpc fixes for 6.0 #4
- Fix handling of PCI domains in /proc on 32-bit systems using the recently added support
    for numbering buses from zero for each domain.
 
  - A fix and a revert for some changes to use READ/WRITE_ONCE() which caused problems with
    KASAN enabled due to sanitisation calls being introduced in low-level paths that can't
    cope with it.
 
  - Fix build errors on 32-bit caused by the syscall table being misaligned sometimes.
 
  - Two fixes to get IBM Cell native machines booting again, which had bit-rotted while my
    QS22 was temporarily out of action.
 
  - Fix the papr_scm driver to not assume the order of events returned by the hypervisor is
    stable, and a related compile fix.
 
 Thanks to: Aneesh Kumar K.V, Christophe Leroy, Jordan Niethe, Kajol Jain, Masahiro Yamada,
 Nathan Chancellor, Pali Rohár, Vaibhav Jain, Zhouyi Zhou.
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Merge tag 'powerpc-6.0-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Fix handling of PCI domains in /proc on 32-bit systems using the
   recently added support for numbering buses from zero for each domain.

 - A fix and a revert for some changes to use READ/WRITE_ONCE() which
   caused problems with KASAN enabled due to sanitisation calls being
   introduced in low-level paths that can't cope with it.

 - Fix build errors on 32-bit caused by the syscall table being
   misaligned sometimes.

 - Two fixes to get IBM Cell native machines booting again, which had
   bit-rotted while my QS22 was temporarily out of action.

 - Fix the papr_scm driver to not assume the order of events returned by
   the hypervisor is stable, and a related compile fix.

Thanks to Aneesh Kumar K.V, Christophe Leroy, Jordan Niethe, Kajol Jain,
Masahiro Yamada, Nathan Chancellor, Pali Rohár, Vaibhav Jain, and Zhouyi
Zhou.

* tag 'powerpc-6.0-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/papr_scm: Ensure rc is always initialized in papr_scm_pmu_register()
  Revert "powerpc/irq: Don't open code irq_soft_mask helpers"
  powerpc: Fix hard_irq_disable() with sanitizer
  powerpc/rtas: Fix RTAS MSR[HV] handling for Cell
  Revert "powerpc: Remove unused FW_FEATURE_NATIVE references"
  powerpc: align syscall table for ppc32
  powerpc/pci: Enable PCI domains in /proc when PCI bus numbers are not unique
  powerpc/papr_scm: Fix nvdimm event mappings
2022-09-04 11:33:22 -07:00
Linus Torvalds 685ed983e2 s390:
* PCI interpretation compile fixes
 
 RISC-V:
 
 * Fix unused variable warnings in vcpu_timer.c
 
 * Move extern sbi_ext declarations to a header
 
 x86:
 
 * check validity of argument to KVM_SET_MP_STATE
 
 * use guest's global_ctrl to completely disable guest PEBS
 
 * fix a memory leak on memory allocation failure
 
 * mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES
 
 * fix build failure with Clang integrated assembler
 
 * fix MSR interception
 
 * Always flush TLBs when enabling dirty logging
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "s390:

   - PCI interpretation compile fixes

  RISC-V:

   - fix unused variable warnings in vcpu_timer.c

   - move extern sbi_ext declarations to a header

  x86:

   - check validity of argument to KVM_SET_MP_STATE

   - use guest's global_ctrl to completely disable guest PEBS

   - fix a memory leak on memory allocation failure

   - mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES

   - fix build failure with Clang integrated assembler

   - fix MSR interception

   - always flush TLBs when enabling dirty logging"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: check validity of argument to KVM_SET_MP_STATE
  perf/x86/core: Completely disable guest PEBS via guest's global_ctrl
  KVM: x86: fix memoryleak in kvm_arch_vcpu_create()
  KVM: x86: Mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES
  KVM: s390: pci: Hook to access KVM lowlevel from VFIO
  riscv: kvm: move extern sbi_ext declarations to a header
  riscv: kvm: vcpu_timer: fix unused variable warnings
  KVM: selftests: Fix ambiguous mov in KVM_ASM_SAFE()
  KVM: selftests: Fix KVM_EXCEPTION_MAGIC build with Clang
  KVM: VMX: Heed the 'msr' argument in msr_write_intercepted()
  kvm: x86: mmu: Always flush TLBs when enabling dirty logging
  kvm: x86: mmu: Drop the need_remote_flush() function
2022-09-04 11:27:14 -07:00
Nick Desaulniers b0839b281c Makefile.extrawarn: re-enable -Wformat for clang; take 2
-Wformat was recently re-enabled for builds with clang, then quickly
re-disabled, due to concerns stemming from the frequency of default
argument promotion related warning instances.

commit 258fafcd06 ("Makefile.extrawarn: re-enable -Wformat for clang")
commit 21f9c8a13b ("Revert "Makefile.extrawarn: re-enable -Wformat for clang"")

ISO WG14 has ratified N2562 to address default argument promotion
explicitly for printf, as part of the upcoming ISO C2X standard.

The behavior of clang was changed in clang-16 to not warn for the cited
cases in all language modes.

Add a version check, so that users of clang-16 now get the full effect
of -Wformat. For older clang versions, re-enable flags under the
-Wformat group that way users still get some useful checks related to
format strings, without noisy default argument promotion warnings. I
intentionally omitted -Wformat-y2k and -Wformat-security from being
re-enabled, which are also part of -Wformat in clang-16.

Link: https://github.com/ClangBuiltLinux/linux/issues/378
Link: https://github.com/llvm/llvm-project/issues/57102
Link: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2562.pdf
Suggested-by: Justin Stitt <jstitt007@gmail.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Youngmin Nam <youngmin.nam@samsung.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-09-04 11:15:50 -07:00
Linus Torvalds 7726d4c3e6 gpio fixes for v6.0-rc4
- MAINTAINERS update
 - fix resource leaks in gpio-mockup and gpio-pxa
 - add missing locking in gpio-pca953x
 - use 32-bit I/O in gpio-realtek-otto
 - make irq_chip structures immutable in four more drivers
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Merge tag 'gpio-fixes-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:
 "A a set of fixes from the GPIO subsystem.

  Most are small driver fixes except the realtek-otto driver patch which
  is pretty big but addresses a significant flaw that can cause the CPU
  to stay infinitely busy on uncleared ISR on some platforms.

  Summary:
   - MAINTAINERS update
   - fix resource leaks in gpio-mockup and gpio-pxa
   - add missing locking in gpio-pca953x
   - use 32-bit I/O in gpio-realtek-otto
   - make irq_chip structures immutable in four more drivers"

* tag 'gpio-fixes-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: ws16c48: Make irq_chip immutable
  gpio: 104-idio-16: Make irq_chip immutable
  gpio: 104-idi-48: Make irq_chip immutable
  gpio: 104-dio-48e: Make irq_chip immutable
  gpio: realtek-otto: switch to 32-bit I/O
  gpio: pca953x: Add mutex_lock for regcache sync in PM
  gpio: mockup: remove gpio debugfs when remove device
  gpio: pxa: use devres for the clock struct
  MAINTAINERS: rectify entry for XILINX GPIO DRIVER
2022-09-03 21:27:27 -07:00
William Breathitt Gray 6890381720 gpio: ws16c48: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:34 +02:00
William Breathitt Gray 410a5041aa gpio: 104-idio-16: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:26 +02:00