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Index: head/sys/conf/files
===================================================================
--- head/sys/conf/files
+++ head/sys/conf/files
@@ -1661,6 +1661,7 @@
dev/gpio/gpioiic.c optional gpioiic
dev/gpio/gpioled.c optional gpioled !fdt
dev/gpio/gpioled_fdt.c optional gpioled fdt
+dev/gpio/gpiopower.c optional gpiopower fdt
dev/gpio/gpioregulator.c optional gpioregulator fdt ext_resources
dev/gpio/gpiospi.c optional gpiospi
dev/gpio/gpio_if.m optional gpio
Index: head/sys/dev/gpio/gpiopower.c
===================================================================
--- head/sys/dev/gpio/gpiopower.c
+++ head/sys/dev/gpio/gpiopower.c
@@ -0,0 +1,137 @@
+/*-
+ * Copyright (c) 2016 Justin Hibbits
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/eventhandler.h>
+#include <sys/gpio.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/reboot.h>
+
+#include <dev/ofw/ofw_bus.h>
+
+#include <dev/gpio/gpiobusvar.h>
+
+struct gpiopower_softc {
+ gpio_pin_t sc_pin;
+ int sc_rbmask;
+};
+
+static void gpiopower_assert(device_t dev, int howto);
+
+static int
+gpiopower_probe(device_t dev)
+{
+
+ if (ofw_bus_is_compatible(dev, "gpio-poweroff")) {
+ device_set_desc(dev, "GPIO poweroff control");
+ return (0);
+ } else if (ofw_bus_is_compatible(dev, "gpio-restart")) {
+ device_set_desc(dev, "GPIO restart control");
+ return (0);
+ }
+
+ return (ENXIO);
+}
+
+static int
+gpiopower_attach(device_t dev)
+{
+ struct gpiopower_softc *sc;
+ phandle_t node;
+
+ sc = device_get_softc(dev);
+
+ if ((node = ofw_bus_get_node(dev)) == -1)
+ return (ENXIO);
+
+ ofw_gpiobus_parse_gpios(dev, "gpios", &sc->sc_pin);
+ if (sc->sc_pin == NULL) {
+ device_printf(dev, "failed to map GPIO pin\n");
+ return (ENXIO);
+ }
+
+ if (ofw_bus_is_compatible(dev, "gpio-poweroff"))
+ sc->sc_rbmask = RB_HALT | RB_POWEROFF;
+ else
+ sc->sc_rbmask = 0;
+ EVENTHANDLER_REGISTER(shutdown_final, gpiopower_assert, dev,
+ SHUTDOWN_PRI_LAST);
+ gpio_pin_setflags(sc->sc_pin, GPIO_PIN_OUTPUT);
+
+ return (0);
+}
+
+static void
+gpiopower_assert(device_t dev, int howto)
+{
+ struct gpiopower_softc *sc;
+ int do_assert;
+
+ sc = device_get_softc(dev);
+ do_assert = sc->sc_rbmask ? (sc->sc_rbmask & howto) :
+ ((howto & RB_HALT) == 0);
+
+ if (!do_assert)
+ return;
+
+ if (howto & RB_POWEROFF)
+ device_printf(dev, "powering system off\n");
+ else if ((howto & RB_HALT) == 0)
+ device_printf(dev, "resetting system\n");
+ else
+ return;
+
+ gpio_pin_set_active(sc->sc_pin, true);
+
+ /* Wait a second for it to trip */
+ DELAY(10000000);
+}
+
+static devclass_t gpiopower_devclass;
+
+static device_method_t gpiopower_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, gpiopower_probe),
+ DEVMETHOD(device_attach, gpiopower_attach),
+
+ DEVMETHOD_END
+};
+
+static driver_t gpiopower_driver = {
+ "gpiopower",
+ gpiopower_methods,
+ sizeof(struct gpiopower_softc)
+};
+
+DRIVER_MODULE(gpiopower, simplebus, gpiopower_driver, gpiopower_devclass, 0, 0);
+MODULE_DEPEND(gpiopower, gpiobus, 1, 1, 1);
Index: head/sys/powerpc/conf/MPC85XX
===================================================================
--- head/sys/powerpc/conf/MPC85XX
+++ head/sys/powerpc/conf/MPC85XX
@@ -75,6 +75,7 @@
device ether
device fxp
device gpio
+device gpiopower
device iic
device iicbus
#device isa
Index: head/sys/powerpc/conf/MPC85XXSPE
===================================================================
--- head/sys/powerpc/conf/MPC85XXSPE
+++ head/sys/powerpc/conf/MPC85XXSPE
@@ -75,6 +75,7 @@
device ether
device fxp
device gpio
+device gpiopower
device iic
device iicbus
#device isa

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