Lines Matching +full:gpio +full:- +full:restart

1 Drive a GPIO line that can be used to restart the system from a restart
5 time, the driver will request the given gpio line and install a restart
6 handler. If the optional properties 'open-source' is not found, the GPIO line
8 the restart is initiated.
10 When the system is restarted, the restart handler will be invoked in
11 priority order.  The gpio is configured as an output, and driven active,
13 inactive->active edge condition, triggering positive edge triggered
14 reset. After a delay specified by active-delay, the GPIO is set to
15 inactive, thus causing an active->inactive edge, triggering negative edge
16 triggered reset. After a delay specified by inactive-delay, the GPIO
17 is driven active again.  After a delay specified by wait-delay, the
18 restart handler completes allowing other restart handlers to be attempted.
21 - compatible : should be "gpio-restart".
22 - gpios : The GPIO to set high/low, see "gpios property" in
23   Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be
25   gpio to "Active High".
28 - open-source : Treat the GPIO as being open source and defer driving
29   it to when the restart is initiated.  If this optional property is not
30   specified, the GPIO is initialized as an output in its inactive state.
31 - priority : A priority ranging from 0 to 255 (default 128) according to
33 	0:	Restart handler of last resort, with limited restart
35 	128:	Default restart handler; use if no other restart handler is
36 		expected to be available, and/or if restart functionality is
37 		sufficient to restart the entire system
38 	255:	Highest priority restart handler, will preempt all other
39 		restart handlers
40 - active-delay: Delay (default 100) to wait after driving gpio active [ms]
41 - inactive-delay: Delay (default 100) to wait after driving gpio inactive [ms]
42 - wait-delay: Delay (default 3000) to wait after completing restart
47 gpio-restart {
48 	compatible = "gpio-restart";
49 	gpios = <&gpio 4 0>;
51 	active-delay = <100>;
52 	inactive-delay = <100>;
53 	wait-delay = <3000>;