1 /* $NetBSD: fdt_power.c,v 1.1 2017/05/28 15:55:11 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 1.1 2017/05/28 15:55:11 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/kmem.h> 35 36 #include <libfdt.h> 37 #include <dev/fdt/fdtvar.h> 38 39 struct fdtbus_power_controller { 40 device_t power_dev; 41 int power_phandle; 42 const struct fdtbus_power_controller_func *power_funcs; 43 44 struct fdtbus_power_controller *power_next; 45 }; 46 47 static struct fdtbus_power_controller *fdtbus_power = NULL; 48 49 int 50 fdtbus_register_power_controller(device_t dev, int phandle, 51 const struct fdtbus_power_controller_func *funcs) 52 { 53 struct fdtbus_power_controller *power; 54 55 power = kmem_alloc(sizeof(*power), KM_SLEEP); 56 power->power_dev = dev; 57 power->power_phandle = phandle; 58 power->power_funcs = funcs; 59 60 power->power_next = fdtbus_power; 61 fdtbus_power = power; 62 63 return 0; 64 } 65 66 void 67 fdtbus_power_reset(void) 68 { 69 struct fdtbus_power_controller *power; 70 71 for (power = fdtbus_power; power; power = power->power_next) { 72 if (power->power_funcs->reset) 73 power->power_funcs->reset(power->power_dev); 74 } 75 } 76 77 void 78 fdtbus_power_poweroff(void) 79 { 80 struct fdtbus_power_controller *power; 81 82 for (power = fdtbus_power; power; power = power->power_next) { 83 if (power->power_funcs->poweroff) 84 power->power_funcs->poweroff(power->power_dev); 85 } 86 } 87