/* * Copyright (c) 2015 Google, Inc * Written by Simon Glass <sjg@chromium.org> * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef __RESET_H #define __RESET_H enum reset_t { RESET_WARM, /* Reset CPU, keep GPIOs active */ RESET_COLD, /* Reset CPU and GPIOs */ RESET_POWER, /* Reset PMIC (remove and restore power) */ RESET_COUNT, }; struct reset_ops { /** * request() - request a reset of the given type * * Note that this function may return before the reset takes effect. * * @type: Reset type to request * @return -EINPROGRESS if the reset has been started and * will complete soon, -EPROTONOSUPPORT if not supported * by this device, 0 if the reset has already happened * (in which case this method will not actually return) */ int (*request)(struct udevice *dev, enum reset_t type); }; #define reset_get_ops(dev) ((struct reset_ops *)(dev)->driver->ops) /** * reset_request() - request a reset * * @type: Reset type to request * @return 0 if OK, -EPROTONOSUPPORT if not supported by this device */ int reset_request(struct udevice *dev, enum reset_t type); /** * reset_walk() - cause a reset * * This works through the available reset devices until it finds one that can * perform a reset. If the provided reset type is not available, the next one * will be tried. * * If this function fails to reset, it will display a message and halt * * @type: Reset type to request * @return -EINPROGRESS if a reset is in progress, -ENOSYS if not available */ int reset_walk(enum reset_t type); /** * reset_walk_halt() - try to reset, otherwise halt * * This calls reset_walk(). If it returns, indicating that reset is not * supported, it prints a message and halts. */ void reset_walk_halt(enum reset_t type); /** * reset_cpu() - calls reset_walk(RESET_WARM) */ void reset_cpu(ulong addr); #endif