29 Feb, 2020
1 commit
-
commit 0c5aae59270fb1f827acce182786094c9ccf598e upstream.
The serdev tty-port controller driver should reset the tty-port client
operations also on deregistration to avoid a NULL-pointer dereference in
case the port is later re-registered as a normal tty device.Note that this can only happen with tty drivers such as 8250 which have
statically allocated port structures that can end up being reused and
where a later registration would not register a serdev controller (e.g.
due to registration errors or if the devicetree has been changed in
between).Specifically, this can be an issue for any statically defined ports that
would be registered by 8250 core when an 8250 driver is being unbound.Fixes: bed35c6dfa6a ("serdev: add a tty port controller driver")
Cc: stable # 4.11
Reported-by: Loic Poulain
Signed-off-by: Johan Hovold
Link: https://lore.kernel.org/r/20200210145730.22762-1-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman
15 Jan, 2020
1 commit
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commit c5ee0b3104e0b292d353e63fd31cb8c692645d8c upstream.
Serdev sub-system claims all ACPI serial devices that are not already
initialised. As a result, no device node is created for serial ports
on certain boards such as the Apollo Lake based UP2. This has the
unintended consequence of not being able to raise the login prompt via
serial connection.Introduce a blacklist to reject ACPI serial devices that should not be
claimed by serdev sub-system. Add the peripheral ids for Intel HS UART
to the blacklist to bring back serial port on SoCs carrying them.Cc: stable@vger.kernel.org
Signed-off-by: Punit Agrawal
Acked-by: Hans de Goede
Acked-by: Johan Hovold
Cc: Rob Herring
Link: https://lore.kernel.org/r/20191219100345.911093-1-punit1.agrawal@toshiba.co.jp
Signed-off-by: Greg Kroah-Hartman
05 Apr, 2019
1 commit
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There were a few Kconfig and Makefiles under drivers/tty/ that were
missing a SPDX identifier. Fix that up so that automated tools can
properly classify all kernel source files.Cc: Jiri Slaby
Cc: Jiri Kosina
Cc: Rob Herring
Acked-by: David Sterba
Reviewed-by: Mukesh Ojha
Signed-off-by: Greg Kroah-Hartman
30 Jan, 2019
1 commit
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The tty struct holds a pointer to the driver's tty operations so drop
the unnecessary driver dereference when calling tiocmget and tiocmset.Note that this also makes the calls match the preceding sanity checks as
expected.Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman
28 Nov, 2018
4 commits
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Document the asynchronous serdev_device_write_buf() and synchronous
serdev_device_write() functions using kernel-doc.Specifically, mention that writing data only means that data has been
buffered by the controller, and that the synchronous helper depends on
serdev_device_write_wakeup() being called in the driver write_wakeup()
callback.Signed-off-by: Johan Hovold
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
Allow the synchronous serdev_device_write() helper to be interrupted.
This is useful for cases where I/O is performed on behalf of user space
and we don't want to block indefinitely when using flow control.Signed-off-by: Johan Hovold
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
Make the synchronous serdev_device_write() helper behave analogous to
the asynchronous serdev_device_write_buf() by returning the number of
bytes written (or rather buffered) also on timeout.This will allow drivers to distinguish the case where data was partially
written from the case where no data was written.Also update the only two users that checked the return value.
Signed-off-by: Johan Hovold
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
Use zero to indicate infinite timeout for the synchronous
serdev_device_write() helper.This allows drivers to specify an infinite timeout without knowing about
serdev implementation details, while also allowing the same timeout
argument to be used for both serdev_device_write() and
serdev_device_wait_until_sent().Note that passing zero to the current helper makes no sense; just call
the asynchronous serdev_device_write_buf() directly instead.Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman
15 Jul, 2018
1 commit
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In order to open up the required power gate before any operation can be
effectively performed over the serial bus between CPU and serdev, it's
clearly essential to add common attach functions for PM domains to serdev
at the probe phase.Similarly, the relevant dettach function for the PM domains should be
properly and reversely added at the remove phase.Signed-off-by: Sean Wang
Reviewed-by: Ulf Hansson
Reviewed-by: Johan Hovold
Cc: Rob Herring
Cc: Ulf Hansson
Cc: Jiri Slaby
Cc: linux-serial@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman
02 Jul, 2018
1 commit
-
We want ths tty core changes in here as well.
Signed-off-by: Greg Kroah-Hartman
28 Jun, 2018
2 commits
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Make sure to free all resources associated with the ida on module
exit.Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Cc: stable # 4.11
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Add support for controller runtime power management to serdev core. This
is needed to allow slave drivers to manage the runtime PM state of the
underlying serial controller when its driver, in turn, implements more
aggressive runtime power management (e.g. using autosuspend).For some applications, for example, where loss off initial data after a
remote-wakeup event is acceptable or where rx is not used at all,
aggressive serial controller runtime PM may be used without further
involvement of the slave driver. But when this is not the case, the
slave driver must be able to indicate when incoming data is expected in
order to avoid data loss.To facilitate the common case, where the serial controller power state
is active whenever the port is open (which is the case with just about
every serial driver), and where data loss is not acceptable and cannot
even be prevented by explicit controller runtime power management, an
RPM reference is taken in serdev open and put again at close. This
reference can later be balanced by any serdev driver which wants and/or
can handle aggressive controller runtime PM.Note that the .ignore_children flag is set for the serdev controller to
allow the underlying hardware to idle when no I/O is expected, regardless
of the slave device RPM state.Acked-by: Tony Lindgren
Reviewed-by: Sebastian Reichel
Signed-off-by: Johan Hovold
Acked-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman
14 Mar, 2018
1 commit
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Fix function name in serdev_device_alloc() definition
Signed-off-by: Frédéric Danis
Signed-off-by: Greg Kroah-Hartman
02 Feb, 2018
1 commit
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Pull tty/staging driver updates from Greg KH:
"Here is the big tty/serial driver update for 4.16-rc1.The usual number of various serial driver fixes and updates to try to
get them to work with crazy hardware configurations (seriously, how
many different ways are hardware engineers going to come up with to
hook up a simple UART?)There is also some serdev bugfixes and updates, as well as a
smattering of other small fixes in here.All have been in the linux-next tree for a while, with no reported
issues"* tag 'tty-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (65 commits)
tty: serial: exar: Relocate sleep wake-up handling
tty: fix data race between tty_init_dev and flush of buf
serial: imx: fix endless loop during suspend
serial: core: mark port as initialized after successful IRQ change
serdev: only match serdev devices
serdev: do not generate modaliases for controllers
serial: mxs-auart: don't use GPIOF_* with gpiod_get_direction
serial: 8250_dw: Revert "Improve clock rate setting"
MAINTAINERS: Add myself as designated reviewer for 8250_dw
gpio: serial: max310x: Support open-drain configuration for GPIOs
serdev: Fix serdev_uevent failure on ACPI enumerated serdev-controllers
serial: 8250_ingenic: Parse earlycon options
serial: 8250_ingenic: Add support for the JZ4770 SoC
serial: core: Make uart_parse_options take const char* argument
serial: 8250_of: fix return code when probe function fails to get reset
serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS
serial: 8250_uniphier: fix error return code in uniphier_uart_probe()
tty: n_gsm: Allow ADM response in addition to UA for control dlci
tty: omap-serial: Fix initial on-boot RTS GPIO level
tty: serial: jsm: Add one check against NULL pointer dereference
...
01 Feb, 2018
1 commit
-
Pull networking updates from David Miller:
1) Significantly shrink the core networking routing structures. Result
of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf2) Add netdevsim driver for testing various offloads, from Jakub
Kicinski.3) Support cross-chip FDB operations in DSA, from Vivien Didelot.
4) Add a 2nd listener hash table for TCP, similar to what was done for
UDP. From Martin KaFai Lau.5) Add eBPF based queue selection to tun, from Jason Wang.
6) Lockless qdisc support, from John Fastabend.
7) SCTP stream interleave support, from Xin Long.
8) Smoother TCP receive autotuning, from Eric Dumazet.
9) Lots of erspan tunneling enhancements, from William Tu.
10) Add true function call support to BPF, from Alexei Starovoitov.
11) Add explicit support for GRO HW offloading, from Michael Chan.
12) Support extack generation in more netlink subsystems. From Alexander
Aring, Quentin Monnet, and Jakub Kicinski.13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
Russell King.14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.
15) Many improvements and simplifications to the NFP driver bpf JIT,
from Jakub Kicinski.16) Support for ipv6 non-equal cost multipath routing, from Ido
Schimmel.17) Add resource abstration to devlink, from Arkadi Sharshevsky.
18) Packet scheduler classifier shared filter block support, from Jiri
Pirko.19) Avoid locking in act_csum, from Davide Caratti.
20) devinet_ioctl() simplifications from Al viro.
21) More TCP bpf improvements from Lawrence Brakmo.
22) Add support for onlink ipv6 route flag, similar to ipv4, from David
Ahern.* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
tls: Add support for encryption using async offload accelerator
ip6mr: fix stale iterator
net/sched: kconfig: Remove blank help texts
openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
tcp_nv: fix potential integer overflow in tcpnv_acked
r8169: fix RTL8168EP take too long to complete driver initialization.
qmi_wwan: Add support for Quectel EP06
rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
ipmr: Fix ptrdiff_t print formatting
ibmvnic: Wait for device response when changing MAC
qlcnic: fix deadlock bug
tcp: release sk_frag.page in tcp_disconnect
ipv4: Get the address of interface correctly.
net_sched: gen_estimator: fix lockdep splat
net: macb: Handle HRESP error
net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
ipv6: addrconf: break critical section in addrconf_verify_rtnl()
ipv6: change route cache aging logic
i40e/i40evf: Update DESC_NEEDED value to reflect larger value
bnxt_en: cleanup DIM work on device shutdown
...
30 Jan, 2018
1 commit
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Pull MFD updates from Lee Jones:
"New Drivers:
- Add support for RAVE Supervisory ProcessorMoved drivers:
- Move Realtek Card Reader Driver to MiscNew Device Support:
- Add support for Pinctrl to axp20xNew Functionality:
- Add resume support to atmel-flexcomFix-ups:
- Split MFD (mfd) and userspace handlers (platform) in cros_ec
- Fix trivial (whitespace, spelling) issue(s) in pcf50633-core
- Clean-up error handling in ab8500-debugfs
- General tidying up in tmio_core
- Kconfig fix-ups for qcom-pm8xxx
- Licensing changes (SPDX) to stm32-lptimer, stm32-timers
- Device Tree fixups in mc13xxx
- Simplify/remove unused code in cros_ec_spi, axp20x, ti_am335x_tscadc,
kempld-core, intel_soc_pmic_core.c, ab8500-debugfs"* tag 'mfd-next-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (32 commits)
mfd: lpc_ich: Do not touch SPI-NOR write protection bit on Apollo Lake
mfd: axp20x: Mark axp288 CHRG_BAK_CTRL register volatile
mfd: ab8500: Introduce DEFINE_SHOW_ATTRIBUTE() macro
atmel_flexcom: Support resuming after a chip reset
mfd: Remove duplicate includes
dt-bindings: mfd: mc13xxx: Add the unit address to sysled
mfd: stm32: Adopt SPDX identifier
mfd: axp20x: Add pinctrl cell for AXP813
mfd: pm8xxx: Make elegible for COMPILE_TEST
mfd: kempld-core: Use resource_size function on resource object
mfd: tmio: Move register macros to tmio_core.c
mfd: cros ec: spi: Simplify delay handling between SPI messages
mfd: palmas: Assign the right powerhold mask for tps65917
mfd: ab8500-debugfs: Use common error handling code in ab8500_print_modem_registers()
mfd: ti_am335x_tscadc: Remove redundant assignment to node
mfd: pcf50633: Fix spelling mistake: 'Falied' -> 'Failed'
dt-bindings: watchdog: Add bindings for RAVE SP watchdog driver
watchdog: Add RAVE SP watchdog driver
mfd: Add driver for RAVE Supervisory Processor
serdev: Introduce devm_serdev_device_open()
...
23 Jan, 2018
1 commit
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Adds serdev_device_set_parity() and an implementation for ttyport.
The interface uses an enum with the values SERIAL_PARITY_NONE,
SERIAL_PARITY_EVEN and SERIAL_PARITY_ODD.Signed-off-by: Ulrich Hecht
Reviewed-by: Sebastian Reichel
Reviewed-by: Johan Hovold
Acked-by: Greg Kroah-Hartman
Signed-off-by: Marcel Holtmann
22 Jan, 2018
2 commits
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Only serdev devices (a.k.a. clients or slaves) are bound to drivers so
bail out early from match() in case the device is not a serdev device
(i.e. if it's a serdev controller).Signed-off-by: Johan Hovold
Reviewed-by: Sebastian Reichel
Signed-off-by: Greg Kroah-Hartman -
Serdev controllers are not bound to any drivers and it therefore makes
no sense to generate modaliases for them.This has already been fixed separately for ACPI controllers for which
uevent errors were also being logged during probe due to the missing
ACPI companions (from which ACPI modaliases are generated).This patch moves the modalias handling from the bus type to the client
device type. Specifically, this means that only serdev devices (a.k.a.
clients or slaves) will have have MODALIAS fields in their uevent
environments and corresponding modalias sysfs attributes.Also add the missing static keyword for the modalias device attribute
when moving the definition.Reported-by: Hans de Goede
Signed-off-by: Johan Hovold
Reviewed-by: Sebastian Reichel
Signed-off-by: Greg Kroah-Hartman
09 Jan, 2018
1 commit
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ACPI enumerated serdev-controllers do not have an ACPI companion, the ACPI
companion belongs to the serdev-device child of the serdev-controller, not
to the controller itself. This was causing serdev_uevent to always return
-ENODEV when called on a serdev-controller leading to errors like these:kernel: serial serial0: uevent: failed to send synthetic uevent
being logged. This commit modifies serdev_uevent to directly return 0
when called on an ACPI enumerated serdev-controller fixing this.Note: I do not think that setting a modalias on a devicetree enumerated
serdev-controller makes sense either. So perhaps the !dev->of_node part of
the check can be dropped too, but I'm not entirely sure that doing this
on devicetree too is correct.Signed-off-by: Hans de Goede
Acked-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman
08 Jan, 2018
2 commits
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Add code implementing managed version of serdev_device_open() for
serdev device drivers that "open" the device during driver's lifecycle
only once (e.g. opened in .probe() and closed in .remove()).Acked-by: Philippe Ombredanne
Acked-by: Pavel Machek
Acked-by: Rob Herring
Reviewed-by: Sebastian Reichel
Reviewed-by: Guenter Roeck
Signed-off-by: Andrey Smirnov
Signed-off-by: Lee Jones -
Using devres infrastructure it is possible to write a serdev driver
that doesn't have any code that needs to be called as a part of
.remove. Add code to make .remove optional.Acked-by: Philippe Ombredanne
Acked-by: Pavel Machek
Acked-by: Rob Herring
Reviewed-by: Sebastian Reichel
Reviewed-by: Guenter Roeck
Signed-off-by: Andrey Smirnov
Signed-off-by: Lee Jones
18 Dec, 2017
1 commit
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Serdev does not use the file abstraction and specifically there will
never be anyone polling a file descriptor for POLLOUT events.Just use plain wake_up_interruptible() in the write_wakeup callback and
document why it's there.Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman
11 Dec, 2017
1 commit
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We want the serial/tty fixes in here as well.
Signed-off-by: Greg Kroah-Hartman
28 Nov, 2017
7 commits
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Serdev currently does not support hangups so make sure to set CLOCAL to
prevent loss of carrier from triggering one.Note however that not all tty drivers honour CLOCAL.
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Release the tty lock once tty-driver open returns to make it clear that
it does not protect neither tty->termios or the serport flags.Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Make sure to hold the tty lock as required when calling tty-driver
close() (e.g. to avoid racing with hangup()).Note that the serport active flag is currently set under the lock at
controller open, but really isn't protected by it.Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Signed-off-by: Johan Hovold
Cc: stable
Signed-off-by: Greg Kroah-Hartman -
Make sure to use a properly refcounted tty_struct in write_wake up to
avoid dereferencing a NULL-pointer when a port is being hung up.Fixes: bed35c6dfa6a ("serdev: add a tty port controller driver")
Cc: stable # 4.11
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
The receive_buf tty-port callback should return the number of bytes
accepted and must specifically never return a negative errno (or a value
larger than the buffer size) to the tty layer.A serdev driver not providing a receive_buf callback would currently
cause the flush_to_ldisc() worker to spin in a tight loop when the tty
buffer pointers are incremented with -EINVAL (-22) after data has been
received.A serdev driver occasionally returning a negative errno (or a too large
byte count) could cause information leaks or crashes when accessing
memory outside the tty buffers in consecutive callbacks.Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Cc: stable # 4.11
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Add code implementing managed version of serdev_device_open() for
serdev device drivers that "open" the device during driver's lifecycle
only once (e.g. opened in .probe() and closed in .remove()).Cc: linux-kernel@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Cc: Rob Herring
Cc: cphealy@gmail.com
Cc: Guenter Roeck
Cc: Lucas Stach
Cc: Nikita Yushchenko
Cc: Lee Jones
Cc: Greg Kroah-Hartman
Cc: Pavel Machek
Cc: Andy Shevchenko
Cc: Johan Hovold
Cc: Sebastian Reichel
Acked-by: Rob Herring
Reviewed-by: Sebastian Reichel
Reviewed-by: Guenter Roeck
Signed-off-by: Andrey Smirnov
Signed-off-by: Greg Kroah-Hartman -
Using devres infrastructure it is possible to write a serdev driver
that doesn't have any code that needs to be called as a part of
.remove. Add code to make .remove optional.Cc: linux-kernel@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Cc: Rob Herring
Cc: cphealy@gmail.com
Cc: Guenter Roeck
Cc: Lucas Stach
Cc: Nikita Yushchenko
Cc: Lee Jones
Cc: Greg Kroah-Hartman
Cc: Pavel Machek
Cc: Andy Shevchenko
Cc: Johan Hovold
Cc: Sebastian Reichel
Acked-by: Rob Herring
Reviewed-by: Sebastian Reichel
Reviewed-by: Guenter Roeck
Signed-off-by: Andrey Smirnov
Signed-off-by: Greg Kroah-Hartman
08 Nov, 2017
2 commits
-
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: Rob Herring
Cc: Jiri Slaby
Signed-off-by: Greg Kroah-Hartman -
It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.Update the drivers/tty files files with the correct SPDX license
identifier based on the license text in the file itself. The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.Cc: Jiri Slaby
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Chris Metcalf
Cc: Jiri Kosina
Cc: David Sterba
Cc: James Hogan
Cc: Rob Herring
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: "Maciej W. Rozycki"
Cc: "Uwe Kleine-König"
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: Kevin Cernekee
Cc: Laxman Dewangan
Cc: Thierry Reding
Cc: Jonathan Hunter
Cc: Barry Song
Cc: Patrice Chotard
Cc: Maxime Coquelin
Cc: Alexandre Torgue
Cc: "David S. Miller"
Cc: Peter Korsgaard
Cc: Timur Tabi
Cc: Tony Prisk
Cc: Michal Simek
Cc: "Sören Brinkmann"
Cc: Thomas Gleixner
Cc: Kate Stewart
Cc: Philippe Ombredanne
Cc: Jiri Slaby
Signed-off-by: Greg Kroah-Hartman
23 Oct, 2017
4 commits
-
Reorder controller initialisation so that in the unlikely event that id
allocation fails, we don't end up releasing id 0 in the destructor.Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Serdev currently only supports a single slave device, but the required
sanity checks to prevent further registration attempts were missing.If a serial-port node has two child nodes with compatible properties,
the OF code would try to register two slave devices using the same id
and name. Driver core will not allow this (and there will be loud
complaints), but the controller's slave pointer would already have been
set to address of the soon to be deallocated second struct
serdev_device. As the first slave device remains registered, this can
lead to later use-after-free issues when the slave callbacks are
accessed.Note that while the serdev registration helpers are exported, they are
typically only called by serdev core. Any other (out-of-tree) callers
must serialise registration and deregistration themselves.Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Cc: stable # 4.11
Cc: Rob Herring
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Add missing error handling for tty-driver open() which may fail (e.g. if
resource allocation fails or if a port is being disconnected).Note that close() must be called also in case of failed open() and that
the operation sanity check is amended to catch buggy drivers.Signed-off-by: Johan Hovold
Acked-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
The tty-driver open routine is mandatory, but the serdev
tty-port-controller implementation did not treat it as such and would
instead fall back to calling tty_port_open() directly.Signed-off-by: Johan Hovold
Acked-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman
20 Oct, 2017
2 commits
-
This patch allows SerDev module to manage serial devices declared as
attached to an UART in ACPI table.acpi_serdev_add_device() callback will only take into account entries
without enumerated flag set. This flags is set for all entries during
ACPI scan, except for SPI and I2C serial devices, and for UART with
2nd patch in the series.Check if a serdev device as been allocated during acpi_walk_namespace()
to prevent serdev controller registration instead of the tty-class device.Signed-off-by: Frédéric Danis
Reviewed-by: Rob Herring
Reviewed-by: Sebastian Reichel
Reviewed-by: Johan Hovold
Acked-by: Rafael J. Wysocki
Signed-off-by: Greg Kroah-Hartman -
Amend the Serial device bus Kconfig entries to clarify that you most
likely also want to enable TTY port controller support, and make
SERIAL_DEV_CTRL_TTYPORT default to Y (when bus support is enabled).Note that the TTY port controller is currently the only in-kernel
serdev controller implementation.Signed-off-by: Johan Hovold
Reviewed-by: Sebastian Reichel
Signed-off-by: Greg Kroah-Hartman
30 Jul, 2017
1 commit
-
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.Signed-off-by: Rob Herring
Acked-by: David S. Miller
Cc: Jiri Slaby
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: "David S. Miller"
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-serial@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman
