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/*
* 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);
}
int reset_walk(enum reset_t type)
{
struct udevice *dev;
int ret = -ENOSYS;
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;
}
type++;
}
return ret;
}
void reset_walk_halt(enum reset_t type)
{
int ret;
ret = reset_walk(type);
/* Wait for the reset to take effect */
if (ret == -EINPROGRESS)
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_halt(RESET_WARM);
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
reset_walk_halt(RESET_WARM);
return 0;
}
UCLASS_DRIVER(reset) = {
.id = UCLASS_RESET,
.name = "reset",
};
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