projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 11636258 SW |
2 | /* |
| 3 | * Copyright (c) 2015 Google, Inc | |
| 4 | * Written by Simon Glass <[email protected]> | |
| 11636258 SW |
5 | */ |
| 6 | ||
| 7 | #ifndef __SYSRESET_H | |
| 8 | #define __SYSRESET_H | |
| 9 | ||
| 10 | enum sysreset_t { | |
| 11 | SYSRESET_WARM, /* Reset CPU, keep GPIOs active */ | |
| 12 | SYSRESET_COLD, /* Reset CPU and GPIOs */ | |
| 13 | SYSRESET_POWER, /* Reset PMIC (remove and restore power) */ | |
| 14 | ||
| 15 | SYSRESET_COUNT, | |
| 16 | }; | |
| 17 | ||
| 18 | struct sysreset_ops { | |
| 19 | /** | |
| 20 | * request() - request a sysreset of the given type | |
| 21 | * | |
| 22 | * Note that this function may return before the reset takes effect. | |
| 23 | * | |
| 24 | * @type: Reset type to request | |
| 25 | * @return -EINPROGRESS if the reset has been started and | |
| 26 | * will complete soon, -EPROTONOSUPPORT if not supported | |
| 27 | * by this device, 0 if the reset has already happened | |
| 28 | * (in which case this method will not actually return) | |
| 29 | */ | |
| 30 | int (*request)(struct udevice *dev, enum sysreset_t type); | |
| 31 | }; | |
| 32 | ||
| 33 | #define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops) | |
| 34 | ||
| 35 | /** | |
| 36 | * sysreset_request() - request a sysreset | |
| 37 | * | |
| 38 | * @type: Reset type to request | |
| 39 | * @return 0 if OK, -EPROTONOSUPPORT if not supported by this device | |
| 40 | */ | |
| 41 | int sysreset_request(struct udevice *dev, enum sysreset_t type); | |
| 42 | ||
| 43 | /** | |
| 44 | * sysreset_walk() - cause a system reset | |
| 45 | * | |
| 46 | * This works through the available sysreset devices until it finds one that can | |
| 47 | * perform a reset. If the provided sysreset type is not available, the next one | |
| 48 | * will be tried. | |
| 49 | * | |
| 50 | * If this function fails to reset, it will display a message and halt | |
| 51 | * | |
| 52 | * @type: Reset type to request | |
| 53 | * @return -EINPROGRESS if a reset is in progress, -ENOSYS if not available | |
| 54 | */ | |
| 55 | int sysreset_walk(enum sysreset_t type); | |
| 56 | ||
| 57 | /** | |
| 58 | * sysreset_walk_halt() - try to reset, otherwise halt | |
| 59 | * | |
| 60 | * This calls sysreset_walk(). If it returns, indicating that reset is not | |
| 61 | * supported, it prints a message and halts. | |
| 62 | */ | |
| 63 | void sysreset_walk_halt(enum sysreset_t type); | |
| 64 | ||
| 65 | /** | |
| 66 | * reset_cpu() - calls sysreset_walk(SYSRESET_WARM) | |
| 67 | */ | |
| 68 | void reset_cpu(ulong addr); | |
| 69 | ||
| 70 | #endif |