1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
13 SYSRESET_WARM, /* Reset CPU, keep GPIOs active */
14 SYSRESET_COLD, /* Reset CPU and GPIOs */
15 SYSRESET_POWER, /* Reset PMIC (remove and restore power) */
16 SYSRESET_POWER_OFF, /* Turn off power */
23 * request() - request a sysreset of the given type
25 * Note that this function may return before the reset takes effect.
27 * @type: Reset type to request
28 * @return -EINPROGRESS if the reset has been started and
29 * will complete soon, -EPROTONOSUPPORT if not supported
30 * by this device, 0 if the reset has already happened
31 * (in which case this method will not actually return)
33 int (*request)(struct udevice *dev, enum sysreset_t type);
35 * get_status() - get printable reset status information
37 * @dev: Device to check
38 * @buf: Buffer to receive the textual reset information
39 * @size: Size of the passed buffer
40 * @return 0 if OK, -ve on error
42 int (*get_status)(struct udevice *dev, char *buf, int size);
45 * get_last() - get information on the last reset
47 * @dev: Device to check
48 * @return last reset state (enum sysreset_t) or -ve error
50 int (*get_last)(struct udevice *dev);
53 #define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops)
56 * sysreset_request() - request a sysreset
58 * @type: Reset type to request
59 * @return 0 if OK, -EPROTONOSUPPORT if not supported by this device
61 int sysreset_request(struct udevice *dev, enum sysreset_t type);
64 * sysreset_get_status() - get printable reset status information
66 * @dev: Device to check
67 * @buf: Buffer to receive the textual reset information
68 * @size: Size of the passed buffer
69 * @return 0 if OK, -ve on error
71 int sysreset_get_status(struct udevice *dev, char *buf, int size);
74 * sysreset_get_last() - get information on the last reset
76 * @dev: Device to check
77 * @return last reset state (enum sysreset_t) or -ve error
79 int sysreset_get_last(struct udevice *dev);
82 * sysreset_walk() - cause a system reset
84 * This works through the available sysreset devices until it finds one that can
85 * perform a reset. If the provided sysreset type is not available, the next one
88 * If this function fails to reset, it will display a message and halt
90 * @type: Reset type to request
91 * @return -EINPROGRESS if a reset is in progress, -ENOSYS if not available
93 int sysreset_walk(enum sysreset_t type);
96 * sysreset_get_last_walk() - get information on the last reset
98 * This works through the available sysreset devices until it finds one that can
99 * perform a reset. If the provided sysreset type is not available, the next one
102 * If no device prives the information, this function returns -ENOENT
104 * @return last reset state (enum sysreset_t) or -ve error
106 int sysreset_get_last_walk(void);
109 * sysreset_walk_halt() - try to reset, otherwise halt
111 * This calls sysreset_walk(). If it returns, indicating that reset is not
112 * supported, it prints a message and halts.
114 void sysreset_walk_halt(enum sysreset_t type);
117 * reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
119 void reset_cpu(void);