/* $NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $ */

/*-
* Copyright (c) 2017 Jared McNeill <[email protected]>
* 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>
__KERNEL_RCSID(0, "$NetBSD: fdt_power.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kmem.h>
#include <sys/queue.h>

#include <libfdt.h>
#include <dev/fdt/fdtvar.h>

struct fdtbus_power_controller {
       device_t power_dev;
       int power_phandle;
       const struct fdtbus_power_controller_func *power_funcs;

       LIST_ENTRY(fdtbus_power_controller) power_next;
};

static LIST_HEAD(, fdtbus_power_controller) fdtbus_power_controllers =
   LIST_HEAD_INITIALIZER(fdtbus_power_controllers);

int
fdtbus_register_power_controller(device_t dev, int phandle,
   const struct fdtbus_power_controller_func *funcs)
{
       struct fdtbus_power_controller *power;

       power = kmem_alloc(sizeof(*power), KM_SLEEP);
       power->power_dev = dev;
       power->power_phandle = phandle;
       power->power_funcs = funcs;

       LIST_INSERT_HEAD(&fdtbus_power_controllers, power, power_next);

       return 0;
}

void
fdtbus_power_reset(void)
{
       struct fdtbus_power_controller *power;

       LIST_FOREACH(power, &fdtbus_power_controllers, power_next) {
               if (power->power_funcs->reset)
                       power->power_funcs->reset(power->power_dev);
       }
}

void
fdtbus_power_poweroff(void)
{
       struct fdtbus_power_controller *power;

       LIST_FOREACH(power, &fdtbus_power_controllers, power_next) {
               if (power->power_funcs->poweroff)
                       power->power_funcs->poweroff(power->power_dev);
       }
}