25 May, 2010
2 commits
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Content for the 8bit device threaded interrupt handlers. Depending on the
interrupt line and chip configuration, either click or wakeup / freefall
handler is called. In case of click, BTN_ event is sent via input device.
In case of wakeup or freefall, input device ABS_ events are updated
immediatelly.It is still possible to configure interrupt line 1 for fast freefall
detection and use the second line either for click or threshold based
interrupts. Or both lines can be used for click / threshold interrupts.Polled input device can be set to stopped state and still get coordinate
updates via input device using interrupt based method. Polled mode and
interrupt mode can also be used parallel.BTN_ events are remapped based on existing axis remapping information.
Signed-off-by: Samu Onkalo
Acked-by: Eric Piel
Cc: Daniel Mack
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Definitions for click were missing.
Signed-off-by: Samu Onkalo
Acked-by: Eric Piel
Tested-by: Daniel Mack
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Dec, 2009
7 commits
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Report output values as 1/1000 of earth gravity.
Output values from lis3 can be read from sysfs position entry and from
input device. Input device can be accessed as event device and as
joystick device. Joystick device can be in two modes. Meaning of the
output values varies from case to case depending on the chip type and
configuration (scale). Only joystick interface in JS_CORR_BROKEN mode
returned somehow similar output values in different configurations.
Joystick device is in that state by default in case of lis3.Position sysfs entry, input event device and raw joystick device have been
little bit broken since meaning of the output values has been varied
between 12 and 8 bit devices. Applications which relayed on those methods
failed if the chip is different than the expected one.This patch converts output values to mean similar thing in different
configurations. Both 8 and 12 bit devices reports now same acceleration
values. If somebody implements full scale support to the driver, output
values will still mean the same. Scaling factor and input device range
must be updated in that case.Joystick interface in JS_CORR_BROKEN mode is not touched by this patch.
All other interfaces have different scale after this change. For 12 bit
device scaling factor is 0.977 which keeps scaled and unscaled values are
quite close to each others. For 8 bit device, scaled values are 18 times
bigger than unscaled values.Signed-off-by: Samu Onkalo
Acked-by: Éric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It is possible to read position information at the chip measurement rate
via sysfs. This patch adds possibility to configure chip measurement
rate.Signed-off-by: Samu Onkalo
Signed-off-by: Éric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Chip is calibrated by the manufacturer. There is no need to calibarate it
at driver level. If the chip is used as a joystick, calibaration can be
done using joystick device calibration mechanism.Signed-off-by: Samu Onkalo
Acked-by: Éric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Implement selftest feature as specified by chip manufacturer. Control:
read selftest sysfs entryResponse: "OK x y z" or "FAIL x y z"
where x, y, and z are difference between selftest mode and normal mode.
Test is passed when values are within acceptance limit values.Acceptance limits are provided via platform data. See chip spesifications
for acceptance limits. If limits are not properly set, OK / FAIL decision
is meaningless. However, userspace application can still make decision
based on the numeric x, y, z values.Selftest is meant for HW diagnostic purposes. It is not meant to be
called during normal use of the chip. It may cause false interrupt
events. Selftest mode delays polling of the normal results but it doesn't
cause wrong values. Chip must be in static state during selftest. Any
acceration during the test causes most probably failure.Signed-off-by: Samu Onkalo
Acked-by: Éric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Lis3 accelerometer sensors have quite long power on delay (up to 125
ms). This patch adds necessary delay to power on sequence for currently
supported lis3 chips.Signed-off-by: Samu Onkalo
Tested-by: Éric Piel
Acked-by: Éric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Originally the driver was only targeted to 12bits sensors. When support
for 8bits sensors was added, some slight difference in the registers were
overlooked. This should fix it, both for initialization, and for
displaying the rate.Reported-by: Kalhan Trisal
Reported-by: Christoph Plattner
Tested-by: Christoph Plattner
Tested-by: Samu Onkalo
Signed-off-by: Éric Piel
Signed-off-by: Samu Onkalo
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Most of the documentation and comments were written when the driver was
only supporting one type of chip, only via ACPI/HP. Update the info to
the much clearer understanding that we have now.Signed-off-by: Éric Piel
Signed-off-by: Samu Onkalo
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Sep, 2009
1 commit
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This offers a way for platforms to define flags and thresholds for the
free-fall/wakeup functions of the lis302d chips.More registers needed to be seperated as they are specific to the
Signed-off-by: Daniel Mack
Acked-by: Pavel Machek
Cc: Eric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jun, 2009
3 commits
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The LIS302DL accelerometer chip has a 'click' feature which can be used to
detect sudden motion on any of the three axis. Configuration data is
passed via spi platform_data and no action is taken if that's not
specified, so it won't harm any existing platform.To make the configuration effective, the IRQ lines need to be set up
appropriately. This patch also adds a way to do that from board support
code.The DD_* definitions were factored out to an own enum because they are
specific to LIS3LV02D devices.Signed-off-by: Daniel Mack
Acked-by: Pavel Machek
Acked-by: Eric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Now that there is no need to hookup on the open/close of the joystick,
it's possible to use the simplified interface input_polled_device, instead
of creating our own kthread.[randy.dunlap@oracle.com: fix Kconfig]
[randy.dunlap@oracle.com: fix Kconfig some more]
Signed-off-by: Eric Piel
Signed-off-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
After measurement on my laptop, it seems that turning off the device does
not bring any energy saving (within 0.1W precision). So let's keep the
device always on. It simplifies the code, and it avoids the problem of
reading a wrong value sometimes just after turning the device on.Moreover, since commit ef2cfc790bf5f0ff189b01eabc0f4feb5e8524df had been
too zealous, the device was actually never turned off anyway. This patch
also restores the damages done by this commit concerning the
initialisation/poweroff.Also do more clean up with the usage of the lis3_dev global variable.
Signed-off-by: Eric Piel
Signed-off-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Apr, 2009
2 commits
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This solves the dependency between lis3lv02d.[ch] and ACPI specific
methods. It introduces a ->bus_priv pointer to the device struct which is
casted to 'struct acpi_device' in the ACIP layer. Changed hp_accel.c
accordingly.Signed-off-by: Daniel Mack
Acked-by: Pavel Machek
Acked-by: Eric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
As Andrew noted, adev is pretty poor name for symbol being exported.
Rename it to lis3.Signed-off-by: Pavel Machek
Cc: Eric Piel
Cc: Vladimir Botka
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Feb, 2009
2 commits
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Sensors responding with 0x3B to WHO_AM_I only have one data register per
direction, thus returning a signed byte from the position which is
occupied by the MSB in sensors responding with 0x3A.Since multiple sensors share the reply to WHO_AM_I, we rename the defines
to better indicate what they identify (family of single and double
precision sensors).We support both kind of sensors by checking for the sensor type on init
and defining appropriate data-access routines and sensor limits (for the
joystick) depending on what we find.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Giuseppe Bilotta
Acked-by: Eric Piel
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds freefall handling to hp_accel driver. According to HP, it
should just work, without us having to set the chip up by hand.hpfall.c is example .c program that parks the disk when accelerometer
detects free fall. It should work; for now, it uses fixed 20seconds
protection period.Signed-off-by: Pavel Machek
Cc: Thomas Renninger
Cc: Éric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Jan, 2009
1 commit
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The sensor can be accessed via various buses. In particular, SPI, I²C
and, on HP laptops, via a specific ACPI API (the only one currently
supported). Separate this latest platform from the core of the sensor
driver to allow support for the other bus type. The second, and more
direct goal is actually to be able to merge this part with the
hp-disk-leds driver, which has the same ACPI PNP number.Signed-off-by: Pavel Machek
Signed-off-by: Eric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Nov, 2008
1 commit
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This adds a driver to the accelerometer sensor found in several HP
laptops (under the commercial names of "HP Mobile Data Protection System
3D" and "HP 3D driveguard"). It tries to have more or less the same
interfaces as the hdaps and other accelerometer drivers: in sysfs and as
a joystick.This driver was first written by Yan Burman. Eric Piel has updated it
and slimed it up (including the removal of an interface to access to the
free-fall feature of the sensor because it is not reliable enough for
now). Pavel Machek removed few more features and switched locking from
semaphore to mutex.Several people have contributed to the database of the axes.
[eric.piel@tremplin-utc.net: LIS3LV02D: Conform to the new ACPI API]
Signed-off-by: Eric Piel
Signed-off-by: Yan Burman
Signed-off-by: Pavel Machek
Cc: "Mark M. Hoffman"
Signed-off-by: Eric Piel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds