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/*
* 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
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