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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/iio driver updates from Greg KH:
"Here is the big staging and iio driver patchsets for 4.11-rc1.
We almost broke even this time around, with only a few thousand lines
added overall, as we removed the old and obsolete i4l code, but added
some new drivers for the RPi platform, as well as adding some new IIO
drivers.
All of these have been in linux-next for a while with no reported
issues"
* tag 'staging-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (669 commits)
Staging: vc04_services: Fix the "space prohibited" code style errors
Staging: vc04_services: Fix the "wrong indent" code style errors
staging: octeon: Use net_device_stats from struct net_device
Staging: rtl8192u: ieee80211: ieee80211.h - style fix
Staging: rtl8192u: ieee80211: ieee80211_tx.c - style fix
Staging: rtl8192u: ieee80211: rtl819x_BAProc.c - style fix
Staging: rtl8192u: ieee80211: ieee80211_module.c - style fix
Staging: rtl8192u: ieee80211: rtl819x_TSProc.c - style fix
Staging: rtl8192u: r8192U.h - style fix
Staging: rtl8192u: r8192U_core.c - style fix
Staging: rtl8192u: r819xU_cmdpkt.c - style fix
staging: rtl8192u: blank lines aren't necessary before a close brace '}'
staging: rtl8192u: Adding space after enum and struct definition
staging: rtl8192u: Adding space after struct definition
Staging: ks7010: Add required and preferred spaces around operators
Staging: ks7010: ks*: Remove redundant blank lines
Staging: ks7010: ks*: Add missing blank lines after declarations
staging: visorbus, replace init_timer with setup_timer
staging: vt6656: rxtx.c Removed multiple dereferencing
staging: vt6656: Alignment match open parenthesis
...
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This patch fixes only obvious lines.
There are still more issues.
Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently we already have two pin configuration related callbacks
available for GPIO chips .set_single_ended() and .set_debounce(). In
future we expect to have even more, which does not scale well if we need
to add yet another callback to the GPIO chip structure for each possible
configuration parameter.
Better solution is to reuse what we already have available in the
generic pinconf.
To support this, we introduce a new .set_config() callback for GPIO
chips. The callback takes a single packed pin configuration value as
parameter. This can then be extended easily beyond what is currently
supported by just adding new types to the generic pinconf enum.
If the GPIO driver is backed up by a pinctrl driver the GPIO driver can
just assign gpiochip_generic_config() (introduced in this patch) to
.set_config and that will take care configuration requests are directed
to the pinctrl driver.
We then convert the existing drivers over .set_config() and finally
remove the .set_single_ended() and .set_debounce() callbacks.
Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Fix checkpatch warnings for parameter type unsigned in greybus.
Note that this patch does not fix all checkpatch warnings for the
affected files.
Signed-off-by: Christian Bewermeyer <christian.bewermeyer@fau.de>
Signed-off-by: Roman Sommer <roman.sommer@fau.de>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Some of the print messages are using the incorrect device pointer, fix
them.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removed braces for single line if statement.
Signed-off-by: Chase Metzger <chasemetzger15@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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No need to support older kernel versions in the Greybus GPIO driver, so
remove the checks as needed, we can now rely on all of the correct
GPIO core apis being present.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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If a gpio line is getting used for an irq, gpio core will create
/proc/irq/X/gpiolib/ directory for it. This directory gets removed while
the gpio controller is unregistered.
In case of greybus, gb_gpio_irqchip_add() creates an irqdomain and
creates irq mappings for the gpio lines. Currently they are added after
registering the gpio controller and removed before the gpio controller
is removed. On the removal path, while the core tries to remove the irq
directory (/proc/irq/X), it finds that the irq is still getting used and
a "gpiolib" directory is present within it and so it gives this warning:
Steps to reproduce:
$ cd /sys/class/gpio
$ echo X > export
$ echo both > gpioX/edge
$ echo <interface-number> > /sys/bus/greybus/devices/1-svc/intf_eject
[ 139.171436] ------------[ cut here ]------------
[ 139.171468] WARNING: at /home/vireshk/all/work/repos/ara/arche/kernel/arche/fs/proc/generic.c:552 remove_proc_entry+0x154/0x188()
[ 139.171476] remove_proc_entry: removing non-empty directory 'irq/683', leaking at least 'gpiolib'
[ 139.171589] Modules linked in: gb_vibrator(O) gb_usb(O) gb_uart(O) gb_spi(O) gb_sdio(O) gb_raw(O) gb_pwm(O) gb_power_supply(O) gb_loopback(O) gb_log(O) gb_light(O) gb_i2c(O) gb_hid(O) gb_gpio(O) gb_gbphy(O) gb_firmware(O) gb_spilib(O) gb_es2(O) gb_camera(O) gb_bootrom(O) gb_audio_module(O) gb_audio_manager(O) gb_audio_codec(O) gb_audio_gb(O) gb_audio_apbridgea(O) gb_arche(O) greybus(O)
[ 139.171605] CPU: 1 PID: 280 Comm: kworker/u16:4 Tainted: G W O 3.10.83-g9771b10cbeed #107
[ 139.171652] Workqueue: greybus1:svc gb_svc_intf_set_power_mode [greybus]
[ 139.171657] Call trace:
[ 139.171677] [<ffffffc000207b40>] dump_backtrace+0x0/0x268
[ 139.171689] [<ffffffc000207db8>] show_stack+0x10/0x1c
[ 139.171707] [<ffffffc000ccad78>] dump_stack+0x1c/0x28
[ 139.171723] [<ffffffc00021f9dc>] warn_slowpath_common+0x74/0x9c
[ 139.171735] [<ffffffc00021fa60>] warn_slowpath_fmt+0x5c/0x80
[ 139.171747] [<ffffffc00035fa38>] remove_proc_entry+0x150/0x188
[ 139.171763] [<ffffffc00027464c>] unregister_irq_proc+0xb4/0xdc
[ 139.171779] [<ffffffc00026e3f4>] free_desc+0x2c/0x70
[ 139.171791] [<ffffffc00026e48c>] irq_free_descs+0x54/0x9c
[ 139.171802] [<ffffffc000273448>] irq_dispose_mapping+0x54/0x64
[ 139.171814] [<ffffffbffc0621e8>] 0xffffffbffc0621e8
[ 139.171825] [<ffffffbffc05e01c>] 0xffffffbffc05e01c
[ 139.171843] [<ffffffc0005d4e30>] __device_release_driver+0x90/0xe4
[ 139.171854] [<ffffffc0005d4ea4>] device_release_driver+0x20/0x38
[ 139.171867] [<ffffffc0005d4634>] bus_remove_device+0x12c/0x148
[ 139.171878] [<ffffffc0005d1cb0>] device_del+0x108/0x16c
[ 139.171888] [<ffffffc0005d1d64>] device_unregister+0x50/0x68
[ 139.171901] [<ffffffbffc05e2bc>] gb_gbphy_deregister_driver+0xf0/0x4ec [gb_gbphy]
[ 139.171924] [<ffffffbffc0014c4>] greybus_disabled+0x14c4/0x1760 [greybus]
[ 139.171936] [<ffffffc0005d4e30>] __device_release_driver+0x90/0xe4
[ 139.171948] [<ffffffc0005d4ea4>] device_release_driver+0x20/0x38
[ 139.171959] [<ffffffc0005d4634>] bus_remove_device+0x12c/0x148
[ 139.171969] [<ffffffc0005d1cb0>] device_del+0x108/0x16c
[ 139.171992] [<ffffffbffc004cec>] gb_bundle_destroy+0x7c/0x1b0 [greybus]
[ 139.172017] [<ffffffbffc004074>] gb_interface_disable+0xb4/0x178 [greybus]
[ 139.172040] [<ffffffbffc002ae4>] gb_module_del+0x5c/0xf8 [greybus]
[ 139.172063] [<ffffffbffc008418>] gb_svc_intf_set_power_mode+0xea0/0xfe8 [greybus]
[ 139.172078] [<ffffffc00023888c>] process_one_work+0x268/0x3c8
[ 139.172089] [<ffffffc000239a64>] worker_thread+0x204/0x358
[ 139.172108] [<ffffffc00023f43c>] kthread+0xb8/0xc4
[ 139.172114] ---[ end trace 6fa3314e8c6157ca ]---
Also note that registering the gpio controller before creating irqdomain
is incorrect as well and may lead to kernel panic, as a gpio may get
requested as an interrupt source right after the controller is
registered, and the greybus gpio driver wouldn't be fully ready by then.
This patch changes the sequence in both probe() and remove() to fix it.
Fixes: 426e88a47d39 ("greybus: gpio: add interrupt handling support")
Reported-by: David Hsu <davidhsu@google.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add runtime pm support for the gpio driver.
Since there is no remote wakeup support, the
module will not suspend as long as a gpio is
requested.
Maybe an optimization could be made, to allow suspend
if all the requested gpios are in output mode, since
the bridge should maintain the state of the gpio
during suspend.
Testing Done: using the test board, let the
gpbrige enter standby and request a gpio.
Signed-off-by: Axel Haslam <haslam_axel@projectara.com>
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Alex Elder <elder@linaro.org>
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This patch removes few blank lines across the repository at places where
two blank lines were present together or when a blank line is present at
the start or end of a routine.
Note that this doesn't remove most of them from greybus_protocols.h as
they were added on purpose.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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We should be using the generic version handling at bundle level, instead
of at protocol level for bridged PHY devices as well.
The bundle version handling is already in place, though it is *not* used
today as we haven't bumped the version of control protocol yet.
Remove protocol specific handling for bridged PHY devices.
Tested on EVT 1.5 with gpbridge-test module. No nuttx changes are
required with this.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The 'gpbridge' name didn't relaly reflect what the bus is; which
is a bus for bridged-phy devices. So, rename all instances
of 'gpbridge' to more appropriate 'gbphy'
Testing Done:
Build and boot tested. 'lsgb' will stop displaying 'GPBridge' devices
until I change the library to reflect this change.
Signed-off-by: Sandeep Patil <patil_sandeep@projectara.com>
Suggested-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Create separate module for gpio gpbridge driver.
Tested on EVT 1.5 by inserting GP test module, all the devices were
enumerated correctly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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This converts the GPIO driver to be a gpbridge driver, moving it away
from the "legacy" interface.
Testing Done: Tested on gbsim.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
[vaibhav.hiremath@linaro.org: 1.Changed code to retain init/exit fns of
drivers. 2.Exit path fix. 3. Fixed review comments]
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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This converts all drivers to use the gb_connection_get_data() and
gb_connection_set_data() functions to make it a bit more explicit as to
what is going on.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Create gpbridge.h for the gpbridge-specific function prototypes, the
rest of the greybus drivers don't care about them.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
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In kernel version 4.5, struct gpio_chip renamed the field 'dev' to
'parent' so handle this properly.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Use the bundle device directly in gpio error messages instead of the
gpio device, as they are the same pointer. This will make future gpio
api changes much easier to handle.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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We are removing struct device from the gb_connection structure in the
near future. The gb_bundle structure's struct device should be used as
a replacement.
This patch moves the gpio driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
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The ARM-specific set_irq_flags helper has been removed in 4.3. Instead
of doing conditional compilation on the kernel version to avoid build
breakages, simply use the genirq interface directly.
Suggested-by: Rob Herring <rob.herring@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The generic_handle_irq_desc api only have changed in 4.3.0, so check
against the correct version, if not will break builds for 4.2.x.
Fixes: e7895cfc476 ("gpio: handle api change in generic_handle_irq_desc()")
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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generic_handle_irq_desc changed the api in the 4.2 kernel, so fix up the
gpio driver to handle this properly to keep it working.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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This is done from a common place now, no need to replicate it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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We already have macros for these, use them instead of writing fixed
values.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Print (expected-payload-size actual-payload-size), when the size doesn't
match for requests received by the module. This gives more details
required for debugging the issue.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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This macro is also required by core protocols like control and svc, and
hence the 'gpbridge' name doesn't fit anymore.
Lets call this macro gb_builtin_protocol_driver().
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add Greybus GPIO IRQ-type defines rather than rely on the current
Linux implementation.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The current interrupt implementation uses the simple irq-flow handler,
which means that the interrupt subsystem makes no irq-chip callbacks
when handling an interrupt. Specifically, no end-of-interrupt message is
sent when the threaded handler has run. This means that we may currently
re-enable an interrupt before it has been serviced (i.e. the irq-event
operation may complete before the threaded handler has run).
The simple flow handler also silently drops a second interrupt arriving
while a handler is running. This means that we may lose a second edge
interrupt with the current firmware.
Switch to a new one-shot interrupt protocol, where the primary handler
(firmware) always masks and acks an interrupt before sending an event to
the AP. The AP is responsible for unmasking the interrupt when it has
been handled. By having the firmware ack an edge interrupt before
sending the event, a second edge interrupt will no longer get lost.
This one-shot protocol can be implemented in the kernel by using the
level irq-flow handler, one-shot interrupts with threaded handlers and
bus-lock synchronisation for slow buses. Note that the same flow handler
is used for both edge and level interrupts.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The irq-chip callbacks are made in atomic context where we must not do
any synchronous greybus operations.
Fix the current gpio-interrupt implementation by using the bus-lock
functionality provided by the irq subsystem.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Rename irq mask and unmask functions to match the callback names.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Use irq_find_mapping directly rather than go through the legacy gpio
interface.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Use generic_handle_irq_desc rather than call a hardcoded irq-flow
handler directly.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove unused irq-ack operation, which has never been called and does
not make sense for message-signalled interrupts over slow buses.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Fix debugfs output by removing the unimplemented, custom dbg_show
callback. The default implementation is perfectly sufficient.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Avoid the need for all the source files to include "gpbridge.h"
by just having "greybus.h" include it.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Start using gb_gpbridge_protocol_init() in gpbridge drivers.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Spaces were present in place of tab. Fix that.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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In order to facilitate re-use of the gpio, i2c, pwm and i2s
structures, split them out of independent files and add
them into a shared gpbridge.h
This will be a prereq to sharing these headers w/ gbsim.
Cc: Alex Elder <alex.elder@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@google.com>
CC: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Send response to incoming requests from the operation request handler
rather than in every protocol request_recv callback.
This simplifies request_recv error handling and allows for further code
reuse.
Note that if we ever get protocols that need to hold off sending
responses we could implement this by letting them return a special
value (after acquiring the necessary operation references) to suppress
the response from being sent by greybus core.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Send response also to incoming requests that cannot be fulfilled.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Fix null-pointer dereference on failure to look up irq due to missing
error handling.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Make sure to verify the length of incoming requests before trying to
parse the request buffer, which can even be NULL on empty requests.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Add error messages on failures to deactivate, set and get operation
handlers as any errors would not be detected by the upper layers (either
because the callbacks are declared void or expected to return a boolean
value).
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Add warning and refuse to set output value for pin configured as input,
as the result of such an operation is undefined.
Remove incorrect todo-comment suggesting that the driver could
implicitly switch direction as part of the call.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Clean up allocation of line-state array.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Use the more informative dev_err and dev_warn for messages, and make the
messages more uniform.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Make sure to propagate any errors detected up the call chain.
This specifically means that we will detect failed connection init,
something which is now handled more gracefully by greybus core.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Rename all struct gb_gpio_controller-pointer variables "ggc" for
consistency and readability reason.
This also fixes a bunch of lines that exceeded the 80 columns limit.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Remove unnecessary explicit cast of line value.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Remove overly defensive argument verification in gpio-chip callbacks. We
should trust gpiolib to get this right (or we would not even get any
callback) just like the other gpio drivers do.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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Linus Torvalds
Gioh Kim
Mika Westerberg
Roman Sommer
Viresh Kumar
Chase Metzger
Greg Kroah-Hartman
Axel Haslam
Sandeep Patil
Johan Hovold
Rui Miguel Silva
Alex Elder
John Stultz