mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 23:33:00 +00:00
1704d083b3
Add a new reset_walk_halt() function to cause a reset and then halt on failure. The reset_walk() function returns an error code. This is needed for testing since otherwise U-Boot will halt in the middle of a test. Signed-off-by: Simon Glass <sjg@chromium.org>
81 lines
1.4 KiB
C
81 lines
1.4 KiB
C
/*
|
|
* 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",
|
|
};
|