If a gpio doesnt have a direction, like some muxes do, try and set value
if HIGH or LOW was passed.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
There is an issue that when you take an IO pin that has an external PU
resistor and switch it from INPUT to OUTPUT the state of the pin will go
down before you can set it back high.
Signed-off-by: Kurt Eckhardt <kurte@rockisland.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
On platforms without muxing perform a little more checking when the 'real'
linux/sysfs gpio is opened. We don't expect this to fail but on platforms where
the linux gpios can be changed depending on pinctrl/bios configuration this
might not always be the case.
Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Instead of trying to have an implementation that covers most platforms
Leave all mmap up to platform definition. Through function pointers.
gpio_mmap_setup sets up the mmap
Within the internal gpio context struct two more function pointers now
exist mmap_read & mmap_write. They exist there so each context can its
own function for handling a write and read.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
syslog messages should be written as <module>: Message in order to increase
readability and usefulness
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
* Fix a few resource leaks in error conditions
* Makes strtol() calls safer in pwm module
* Make sure buffer is terminated after read() in aio
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Syslog is now used for all error messages, return values in the code should be
used by programmers to see the status of the library/board and syslog can be
used to see quickly from a debugging perspective what has gone wrong. A few
cosmetics where improved as well as a mraa_set_log_level() call where the
syslog log mask can be set directly from libmraa.
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
* Should allow for more platform quirks to be handled by mraa without
* massive conditional areas per platform.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
* added function to gpio to use mmap
* changed board definition format around mmap io (fast-gpio)
* Intel Galileo Rev D updated to follow changed definitions
* Example performing mmap io to pin 2 added.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
Based on feedback received. All check functions renamed to setup.
Update all modules to use new name and header.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
* Will not unexport if the context did not export it. Can be forced.
* Checks if pin is already exported.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
