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https://github.com/brain-hackers/u-boot-brain
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1163625898
The current reset API implements a method to reset the entire system. In the near future, I'd like to introduce code that implements the device tree reset bindings; i.e. the equivalent of the Linux kernel's reset API. This controls resets to individual HW blocks or external chips with reset signals. It doesn't make sense to merge the two APIs into one since they have different semantic purposes. Resolve the naming conflict by renaming the existing reset API to sysreset instead, so the new reset API can be called just reset. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
82 lines
1.4 KiB
C
82 lines
1.4 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.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/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_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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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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printf("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(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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sysreset_walk_halt(SYSRESET_WARM);
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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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};
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