Previously, gpio_switch only accepts GPIO pin number as input. Once a
GPIO pin is exported and named by device tree, its pin state cannot be
configured and saved across reboots by UCI.
This patch adds support for named GPIO pins. Thus GPIO pin can be
exported by device tree with active high/low correctly configured,
having human-readable name in /sys/class/gpio/ is also now possible.
More importantly, GPIO pins which are referenced by name will be immune
from pin mapping breakage while unintentional pin number changes are
introduced by kernel or driver updates.
Signed-off-by: Kuan-Yi Li <kyli@abysm.org>
Obviously not all GPIO controller allow to change the direction. The issue
is around since the beginning of the script but only due to the recent
changes error messages are more visible.
Add a check if a change of the direction is supported by the GPIO
controller and fallback to setting only the value if not.
Fixes: FS#1271
Signed-off-by: Mathias Kresin <dev@kresin.me>
GPIOs are exported as active high to the sysfs, hence the logic need to be
inverted.
Fixes: e66c47fb14 ("base-files: gpio switch: set output value with
direction")
Signed-off-by: Mathias Kresin <dev@kresin.me>
Use the "low" and "high" values to configure the GPIO as an output with
that initial value. It ensures that the gpio doesn't have a unwanted value
during the time the direction is set to ouput and the actual value is
applied.
We don't need to take care of the GPIO polarity for now, since our
exported GPIOs are always active low.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Start gpio_switch before the boot state is set to up/initialised/done.
This way the exported GPIOs are available at the time rc.local is started.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Internal GPIO pins are used for PoE passthrough setups in multi-port
routers. This patch implemnets control over this hardware feature for
Ubiquiti Nanostations and TP-Link CPE510.
Signed-off-by: Lars Kruse <lists@sumpfralle.de>
SVN-Revision: 46271
