Add devicetree based settings for resolution, axis inversion and sleep
mode enable. Keep the resolution setting in its own function so it can
be called by the application again in runtime if needed.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
The active key mask can be used for supporting multiple keyboard layouts
with a single firmware. A possible use case is to support keyboard with
or without a numpad, in which case an entire set of columns may be
missing. Add a check to detect this condition and skip scanning that
column entirely if no keys are defined in it.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an initial input driver for the PixArt PAT9125EL, just core
functionalities for now, will add more configuration properties at a
later stage.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This commit introduces a driver for ADC keys, a common circuit design where
keys are connected to an ADC input via a resistor ladder.
Signed-off-by: Chen Xingyu <hi@xingrz.me>
The CST816S chip ID have an alternative value. It seems that this
field represents in fact a version number of controller. Fix by adding
the new chip ID.
Signed-off-by: Joel Guittet <joelguittet@gmail.com>
Add power management support to the gpio-qdec driver.
This is a bit complicated by the fact that the driver has two modes of
operation and the interrupt, timer and idle work ineract with each
other.
The suspend sequence is:
- set the suspended bit (inhibits the poll timer so that it does not
resubmit the idle work)
- cancel the idle work (so that it does not schedule and re-set the
interrupt or timers)
- disable interrupts (if used)
- stop the sampling timer
- disconnect the pins
The resume sequence is more or less the opposite.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Change the gpio_qdec driver to support optical encoders.
Add a property to use for defining an arbitrary number of GPIOs for the
sensing devices (typically infrared LEDs, but could also be the
biasing for the phototransistor), and one for adding a delay between
turning those on and reading the pin status.
The infrared LEDs typically consume a non negligible amount of power, so
there's also a new idle-poll-time-us property that enables two possible
modes of operation:
- if idle-poll-time-us is zero (default) the LEDs are enabled all the
time and the driver enters polling mode using the GPIO interrupt as
with mechanical encoders. This is usable for mains powered devices and
has the lowest overhead on the CPU.
- if idle-poll-time-us is non zero, then the driver polls the encoder
all the time, turning on the LEDs just before reading the state and
shutting them off immediately after, but when the encoder is idle it
switches the polling rate to idle-poll-time-us to save power, and only
polls at sample-time-us when some movement is detected.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Some MCU have limitations with GPIO interrupts. Add a polling mode to
the gpio-keys driver to support those cases.
This required a bit of a refactoring of the driver data structure to add
a instance wide data, and move the pin specific pointer in the config
structure.
For polling, reuse the button 0 delayed work so we minimize the resource
waste, the two work handler functions are only referenced when used so
at least those are discarded automatically if no instance needs them.
Fix a bug in the PM structure instantiation as well.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
__bswap_ in zephyr/sys/byteorder.h conflicts with __bswap_ in host's
byteswap.h. byteswap.h from host compiler used in posix_native_64 boards
causes a compilation issue.
This commit renames __bswap_ to BSWAP_ to prevent collision.
Before this commit a compilation error can be created by adding #include
<byteswap.h> to samples/net/sockets/echo/src/socket_echo.c
This does not change external API to byteorder.h, but does change
internal implementation which some other source files depend on.
Replaced manual byteswap operations in devmem_service.c with APIs from
byteorder.h which automatically converts to CPU endianess when necessary.
Fixes#44324
Signed-off-by: Jonathan Hamberg <jonathanhamberg@gmail.com>
Add an input driver to read data from an analog device, such as a
thumbstick, connected to an ADC channel, and report it as an input
device.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a check to input_kbd_matrix_actual_key_mask_set() to return an error
if trying to change a key mask but the device does not define a keymask
in the first place.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an option to enable a input_kbd_matrix_actual_key_mask_set API to
enable or disable keys dynamically in the mask. This can be useful if
the exact key mask is determined in runtime and the device is using a
single firmware for multiple matrix configurations.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Use K_KERNEL_STACK_SIZEOF instead of the config directly to set the
stack size in k_thread_create() calls.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
The driver works on active low signals only, change the interrupt
configuration to trigger on falling edges only.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
The driver right now re-enters polling mode a couple times after the
matrix has been detected as stable as the key interrupt is still pending
and fires again once detection is reenabled.
Clear pending WUI interrupts before reenabling key press detection to
avoid that.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Fix a possible race condition in the keyboard matrix library where a key
would get pressed between the last read and reenabling the (edge
sensitive) interrupt and the even would be lost.
The window for this to happen is very narrow and had to artificially add
a sleep to reproduce it.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Change the interrupt setup from both edge to edge to active. Edge to
active is all was needed anyway and it makes this compatible with gpio
controller that only support single edge interrupt.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a device driver to read events from a Linux evdev device node and
inject them back as Zephyr input events.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a config entry for the keyboard matrix thread priority. This
changes the current default, but that was pretty much an arbitrary numbe
anyay and the exact one should be picked the application so it should be
alright to do so.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add power management support to the gpio keys driver. When in suspend,
disable all the button gpios and interrupts.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add power management support to ft5336. The chip can go to hibernate and
reduce power consumption to a minimum, the only way to wake it up though
is by pulsing the reset or wake signal. Only reset is implemented in the
driver right now so only allow this functionality if the reset pin is
defined.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a "input kbd_matrix_state" shell command. This prints the state of
a keyboard matrix in a much more compact representation than the normal
input event dump, but also keeps track of any key seen during the
execution and reports that on the "off" command. The output can be used
to help setting the actual-key-mask property.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Change the gpio_kbd_matrix_set_detect_mode to skip setting gpio
interrupts if we don't have callbacks configured. This is the case if
the driver is running in poll or scan mode.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an optional actual-key-mask property to filter out key combinations
that are not implemented in the actual keyboard matrix.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
The bit check field is redundant since the callback struct is masked to
a single pin already. Drop it, simplify the code a bit.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Use the same ret variable name as the rest of the file, drop a redundant
mask, use gpio_pin_interrupt_configure_dt.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a poll and scan mode for the driver. If any of these are set, the
driver does not use the GPIO interrupts to detect when the matrix has to
switch to polling mode. Instead, it keeps polling it all the time,
either by enabling all the columns and poll the rows for activity, or
just keep scanning all the time.
Poll mode is useful if the specific SoC used does not support GPIO
interrupt on all the row GPIOs at the same time, scan mode if it does
not even support selecting all the columns at the same time.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Tweak the polling mode so that the driver never exit polling mode if
poll_timeout_ms is 0. This is useful if the specific driver does not
support idle mode.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
The state variable to tracking the unstable state of a key is currently
being cleared based on the bit value, which means that on release it's
not being cleared at all. Fix that by clearing using the bit mask
instead.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
scan_clk_cycle is used to store values from k_cycle_get_32(), it very
much needs to be a uint32_t.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an option to call an application specific hook when setting the
column to scan. This makes it possible to handle application specific
quirks.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This is called already as soon as the polling thread starts, so the call
in the gpio init function is harmless but redundant, drop it.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
When the matrix is connected to consecutive pins on the same port, it's
possible to read the whole row or set the whole column in a single
operation. For the column, this is only possible if the matrix is
configured for driving unselected column, as there's no API to configure
multiple pins at the same time at the moment.
This is more efficient than checking the pins individually, and it's
particularly useful if the row or columns are driven from a GPIO port
expander.
Add some code to detect the condition and enable it automatically as
long as the hw configuration supports it.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add an option to drive inactive columns to inactive state rather than
high impedance. This is useful if the matrix has isolation diodes for
every key, as it allows the matrix to stabilize faster and the API for
changing the pin value is more efficient than the one to change the pin
configuration.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a Kconfig option to extend the row type to 16 bits, allowing the
library to handle a 16 row matrix.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add a typedef for the row type rather than using uint8_t directly, this
allow supporting bigger matrix as an option by using a different type.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Move a couple of automatic variable assignment off the declaration
block, leaves only structure aliases there, makes it a bit easier to
read.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Move the scan_cycles_idx increment in input_kbd_matrix_update_state
as it's only used there, use a modulo operation rather than the if to
handle the index wrapping condition.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Replace the wait_period_us clamping functions using a single CLAMP,
reposition the debug log as well.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
