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https://github.com/brain-hackers/u-boot-brain
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e20a6e4479
In our Python tests we expect to see the word "resetting". It may be truncated if we reset before the serial console buffer is transferred. Wait for 100 ms between the "resetting ..." message and the actual reset like we do when powering off. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
165 lines
2.9 KiB
C
165 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_SYSRESET
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#include <common.h>
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#include <command.h>
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#include <cpu_func.h>
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#include <hang.h>
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#include <log.h>
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#include <sysreset.h>
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#include <dm.h>
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#include <errno.h>
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#include <regmap.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/root.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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int sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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struct sysreset_ops *ops = sysreset_get_ops(dev);
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if (!ops->request)
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return -ENOSYS;
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return ops->request(dev, type);
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}
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int sysreset_get_status(struct udevice *dev, char *buf, int size)
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{
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struct sysreset_ops *ops = sysreset_get_ops(dev);
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if (!ops->get_status)
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return -ENOSYS;
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return ops->get_status(dev, buf, size);
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}
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int sysreset_get_last(struct udevice *dev)
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{
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struct sysreset_ops *ops = sysreset_get_ops(dev);
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if (!ops->get_last)
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return -ENOSYS;
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return ops->get_last(dev);
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}
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int sysreset_walk(enum sysreset_t type)
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{
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struct udevice *dev;
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int ret = -ENOSYS;
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while (ret != -EINPROGRESS && type < SYSRESET_COUNT) {
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for (uclass_first_device(UCLASS_SYSRESET, &dev);
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dev;
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uclass_next_device(&dev)) {
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ret = sysreset_request(dev, type);
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if (ret == -EINPROGRESS)
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break;
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}
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type++;
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}
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return ret;
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}
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int sysreset_get_last_walk(void)
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{
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struct udevice *dev;
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int value = -ENOENT;
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for (uclass_first_device(UCLASS_SYSRESET, &dev);
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dev;
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uclass_next_device(&dev)) {
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int ret;
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ret = sysreset_get_last(dev);
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if (ret >= 0) {
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value = ret;
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break;
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}
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}
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return value;
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}
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void sysreset_walk_halt(enum sysreset_t type)
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{
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int ret;
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ret = sysreset_walk(type);
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/* Wait for the reset to take effect */
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if (ret == -EINPROGRESS)
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mdelay(100);
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/* Still no reset? Give up */
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log_err("System reset not supported on this platform\n");
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hang();
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}
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/**
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* reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
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*/
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void reset_cpu(ulong addr)
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{
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sysreset_walk_halt(SYSRESET_WARM);
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}
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int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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printf("resetting ...\n");
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mdelay(100);
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sysreset_walk_halt(SYSRESET_COLD);
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return 0;
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}
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#if IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
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int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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int ret;
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puts("poweroff ...\n");
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mdelay(100);
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ret = sysreset_walk(SYSRESET_POWER_OFF);
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if (ret == -EINPROGRESS)
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mdelay(1000);
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/*NOTREACHED when power off*/
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return CMD_RET_FAILURE;
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}
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#endif
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static int sysreset_post_bind(struct udevice *dev)
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{
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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struct sysreset_ops *ops = sysreset_get_ops(dev);
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static int reloc_done;
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if (!reloc_done) {
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if (ops->request)
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ops->request += gd->reloc_off;
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reloc_done++;
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}
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#endif
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return 0;
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}
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UCLASS_DRIVER(sysreset) = {
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.id = UCLASS_SYSRESET,
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.name = "sysreset",
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.post_bind = sysreset_post_bind,
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};
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