Date: Wed, 16 Nov 2016 02:14:07 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r308709 - in head/sys: conf dev/gpio powerpc/conf Message-ID: <201611160214.uAG2E7VC084972@repo.freebsd.org>
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Author: jhibbits Date: Wed Nov 16 02:14:07 2016 New Revision: 308709 URL: https://svnweb.freebsd.org/changeset/base/308709 Log: Add a GPIO poweroff and reset driver. Summary: This implements part of the gpio-poweroff and gpio-restart device tree bindings. Optional properties are not handled currently. It also currently only supports level-triggered reset. Reviewed By: gonzo Differential Revision: https://reviews.freebsd.org/D8521 Added: head/sys/dev/gpio/gpiopower.c (contents, props changed) Modified: head/sys/conf/files head/sys/powerpc/conf/MPC85XX head/sys/powerpc/conf/MPC85XXSPE Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Wed Nov 16 01:11:49 2016 (r308708) +++ head/sys/conf/files Wed Nov 16 02:14:07 2016 (r308709) @@ -1661,6 +1661,7 @@ dev/gpio/gpioc.c optional gpio \ 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 Added: head/sys/dev/gpio/gpiopower.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/gpio/gpiopower.c Wed Nov 16 02:14:07 2016 (r308709) @@ -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); Modified: head/sys/powerpc/conf/MPC85XX ============================================================================== --- head/sys/powerpc/conf/MPC85XX Wed Nov 16 01:11:49 2016 (r308708) +++ head/sys/powerpc/conf/MPC85XX Wed Nov 16 02:14:07 2016 (r308709) @@ -75,6 +75,7 @@ device alc device ether device fxp device gpio +device gpiopower device iic device iicbus #device isa Modified: head/sys/powerpc/conf/MPC85XXSPE ============================================================================== --- head/sys/powerpc/conf/MPC85XXSPE Wed Nov 16 01:11:49 2016 (r308708) +++ head/sys/powerpc/conf/MPC85XXSPE Wed Nov 16 02:14:07 2016 (r308709) @@ -75,6 +75,7 @@ device alc device ether device fxp device gpio +device gpiopower device iic device iicbus #device isa
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