1/* $NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $ */ 2 3/*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $"); 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/kmem.h> 35#include <sys/queue.h> 36 37#include <libfdt.h> 38#include <dev/fdt/fdtvar.h> 39 40struct fdtbus_power_controller { 41 device_t power_dev; 42 int power_phandle; 43 const struct fdtbus_power_controller_func *power_funcs; 44 45 LIST_ENTRY(fdtbus_power_controller) power_next; 46}; 47 48static LIST_HEAD(, fdtbus_power_controller) fdtbus_power_controllers = 49 LIST_HEAD_INITIALIZER(fdtbus_power_controllers); 50 51int 52fdtbus_register_power_controller(device_t dev, int phandle, 53 const struct fdtbus_power_controller_func *funcs) 54{ 55 struct fdtbus_power_controller *power; 56 57 power = kmem_alloc(sizeof(*power), KM_SLEEP); 58 power->power_dev = dev; 59 power->power_phandle = phandle; 60 power->power_funcs = funcs; 61 62 LIST_INSERT_HEAD(&fdtbus_power_controllers, power, power_next); 63 64 return 0; 65} 66 67void 68fdtbus_power_reset(void) 69{ 70 struct fdtbus_power_controller *power; 71 72 LIST_FOREACH(power, &fdtbus_power_controllers, power_next) { 73 if (power->power_funcs->reset) 74 power->power_funcs->reset(power->power_dev); 75 } 76} 77 78void 79fdtbus_power_poweroff(void) 80{ 81 struct fdtbus_power_controller *power; 82 83 LIST_FOREACH(power, &fdtbus_power_controllers, power_next) { 84 if (power->power_funcs->poweroff) 85 power->power_funcs->poweroff(power->power_dev); 86 } 87} 88