123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119 |
- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright (c) 2015 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #ifndef __SYSRESET_H
- #define __SYSRESET_H
- enum sysreset_t {
- SYSRESET_WARM, /* Reset CPU, keep GPIOs active */
- SYSRESET_COLD, /* Reset CPU and GPIOs */
- SYSRESET_POWER, /* Reset PMIC (remove and restore power) */
- SYSRESET_POWER_OFF, /* Turn off power */
- SYSRESET_COUNT,
- };
- struct sysreset_ops {
- /**
- * request() - request a sysreset 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 sysreset_t type);
- /**
- * get_status() - get printable reset status information
- *
- * @dev: Device to check
- * @buf: Buffer to receive the textual reset information
- * @size: Size of the passed buffer
- * @return 0 if OK, -ve on error
- */
- int (*get_status)(struct udevice *dev, char *buf, int size);
- /**
- * get_last() - get information on the last reset
- *
- * @dev: Device to check
- * @return last reset state (enum sysreset_t) or -ve error
- */
- int (*get_last)(struct udevice *dev);
- };
- #define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops)
- /**
- * sysreset_request() - request a sysreset
- *
- * @type: Reset type to request
- * @return 0 if OK, -EPROTONOSUPPORT if not supported by this device
- */
- int sysreset_request(struct udevice *dev, enum sysreset_t type);
- /**
- * sysreset_get_status() - get printable reset status information
- *
- * @dev: Device to check
- * @buf: Buffer to receive the textual reset information
- * @size: Size of the passed buffer
- * @return 0 if OK, -ve on error
- */
- int sysreset_get_status(struct udevice *dev, char *buf, int size);
- /**
- * sysreset_get_last() - get information on the last reset
- *
- * @dev: Device to check
- * @return last reset state (enum sysreset_t) or -ve error
- */
- int sysreset_get_last(struct udevice *dev);
- /**
- * sysreset_walk() - cause a system reset
- *
- * This works through the available sysreset devices until it finds one that can
- * perform a reset. If the provided sysreset 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 sysreset_walk(enum sysreset_t type);
- /**
- * sysreset_get_last_walk() - get information on the last reset
- *
- * This works through the available sysreset devices until it finds one that can
- * perform a reset. If the provided sysreset type is not available, the next one
- * will be tried.
- *
- * If no device prives the information, this function returns -ENOENT
- *
- * @return last reset state (enum sysreset_t) or -ve error
- */
- int sysreset_get_last_walk(void);
- /**
- * sysreset_walk_halt() - try to reset, otherwise halt
- *
- * This calls sysreset_walk(). If it returns, indicating that reset is not
- * supported, it prints a message and halts.
- */
- void sysreset_walk_halt(enum sysreset_t type);
- /**
- * reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
- */
- void reset_cpu(ulong addr);
- #endif
|