| /* |
| * Copyright (C) 2015 Google, Inc |
| * Written by Simon Glass <sjg@chromium.org> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <reset.h> |
| #include <dm.h> |
| #include <errno.h> |
| #include <regmap.h> |
| #include <dm/device-internal.h> |
| #include <dm/lists.h> |
| #include <dm/root.h> |
| #include <linux/err.h> |
| |
| int reset_request(struct udevice *dev, enum reset_t type) |
| { |
| struct reset_ops *ops = reset_get_ops(dev); |
| |
| if (!ops->request) |
| return -ENOSYS; |
| |
| return ops->request(dev, type); |
| } |
| |
| void reset_walk(enum reset_t type) |
| { |
| struct udevice *dev; |
| int ret = 0; |
| |
| while (ret != -EINPROGRESS && type < RESET_COUNT) { |
| for (uclass_first_device(UCLASS_RESET, &dev); |
| dev; |
| uclass_next_device(&dev)) { |
| ret = reset_request(dev, type); |
| if (ret == -EINPROGRESS) |
| break; |
| } |
| } |
| |
| /* Wait for the reset to take effect */ |
| mdelay(100); |
| |
| /* Still no reset? Give up */ |
| printf("Reset not supported on this platform\n"); |
| hang(); |
| } |
| |
| /** |
| * reset_cpu() - calls reset_walk(RESET_WARM) |
| */ |
| void reset_cpu(ulong addr) |
| { |
| reset_walk(RESET_WARM); |
| } |
| |
| UCLASS_DRIVER(reset) = { |
| .id = UCLASS_RESET, |
| .name = "reset", |
| }; |