1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
7 #define LOG_CATEGORY UCLASS_SYSRESET
18 #include <dm/device-internal.h>
21 #include <linux/err.h>
23 int sysreset_request(struct udevice *dev, enum sysreset_t type)
25 struct sysreset_ops *ops = sysreset_get_ops(dev);
30 return ops->request(dev, type);
33 int sysreset_get_status(struct udevice *dev, char *buf, int size)
35 struct sysreset_ops *ops = sysreset_get_ops(dev);
40 return ops->get_status(dev, buf, size);
43 int sysreset_get_last(struct udevice *dev)
45 struct sysreset_ops *ops = sysreset_get_ops(dev);
50 return ops->get_last(dev);
53 int sysreset_walk(enum sysreset_t type)
58 while (ret != -EINPROGRESS && type < SYSRESET_COUNT) {
59 for (uclass_first_device(UCLASS_SYSRESET, &dev);
61 uclass_next_device(&dev)) {
62 ret = sysreset_request(dev, type);
63 if (ret == -EINPROGRESS)
72 int sysreset_get_last_walk(void)
77 for (uclass_first_device(UCLASS_SYSRESET, &dev);
79 uclass_next_device(&dev)) {
82 ret = sysreset_get_last(dev);
92 void sysreset_walk_halt(enum sysreset_t type)
96 ret = sysreset_walk(type);
98 /* Wait for the reset to take effect */
99 if (ret == -EINPROGRESS)
102 /* Still no reset? Give up */
103 log_err("System reset not supported on this platform\n");
108 * reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
110 void reset_cpu(ulong addr)
112 sysreset_walk_halt(SYSRESET_WARM);
116 int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
118 printf("resetting ...\n");
120 sysreset_walk_halt(SYSRESET_COLD);
125 #if IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
126 int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
130 puts("poweroff ...\n");
133 ret = sysreset_walk(SYSRESET_POWER_OFF);
135 if (ret == -EINPROGRESS)
138 /*NOTREACHED when power off*/
139 return CMD_RET_FAILURE;
143 static int sysreset_post_bind(struct udevice *dev)
145 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
146 struct sysreset_ops *ops = sysreset_get_ops(dev);
147 static int reloc_done;
151 ops->request += gd->reloc_off;
158 UCLASS_DRIVER(sysreset) = {
159 .id = UCLASS_SYSRESET,
161 .post_bind = sysreset_post_bind,