mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 07:01:24 +00:00
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2018 Theobroma Systems Design und Consulting GmbH
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <bootcount.h>
|
|
#include <log.h>
|
|
|
|
int dm_bootcount_get(struct udevice *dev, u32 *bootcount)
|
|
{
|
|
struct bootcount_ops *ops = bootcount_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->get)
|
|
return -ENOSYS;
|
|
return ops->get(dev, bootcount);
|
|
}
|
|
|
|
int dm_bootcount_set(struct udevice *dev, const u32 bootcount)
|
|
{
|
|
struct bootcount_ops *ops = bootcount_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->set)
|
|
return -ENOSYS;
|
|
return ops->set(dev, bootcount);
|
|
}
|
|
|
|
/* Now implement the generic default functions */
|
|
void bootcount_store(ulong val)
|
|
{
|
|
struct udevice *dev = NULL;
|
|
ofnode node;
|
|
const char *propname = "u-boot,bootcount-device";
|
|
int ret = -ENODEV;
|
|
|
|
/*
|
|
* If there's a preferred bootcount device selected by the user (by
|
|
* setting '/chosen/u-boot,bootcount-device' in the DTS), try to use
|
|
* it if available.
|
|
*/
|
|
node = ofnode_get_chosen_node(propname);
|
|
if (ofnode_valid(node))
|
|
ret = uclass_get_device_by_ofnode(UCLASS_BOOTCOUNT, node, &dev);
|
|
|
|
/* If there was no user-selected device, use the first available one */
|
|
if (ret)
|
|
ret = uclass_get_device(UCLASS_BOOTCOUNT, 0, &dev);
|
|
|
|
if (dev)
|
|
ret = dm_bootcount_set(dev, val);
|
|
|
|
if (ret)
|
|
pr_debug("%s: failed to store 0x%lx\n", __func__, val);
|
|
}
|
|
|
|
ulong bootcount_load(void)
|
|
{
|
|
struct udevice *dev = NULL;
|
|
ofnode node;
|
|
const char *propname = "u-boot,bootcount-device";
|
|
int ret = -ENODEV;
|
|
u32 val;
|
|
|
|
/*
|
|
* If there's a preferred bootcount device selected by the user (by
|
|
* setting '/chosen/u-boot,bootcount-device' in the DTS), try to use
|
|
* it if available.
|
|
*/
|
|
node = ofnode_get_chosen_node(propname);
|
|
if (ofnode_valid(node))
|
|
ret = uclass_get_device_by_ofnode(UCLASS_BOOTCOUNT, node, &dev);
|
|
|
|
/* If there was no user-selected device, use the first available one */
|
|
if (ret)
|
|
ret = uclass_get_device(UCLASS_BOOTCOUNT, 0, &dev);
|
|
|
|
if (dev)
|
|
ret = dm_bootcount_get(dev, &val);
|
|
|
|
if (ret)
|
|
pr_debug("%s: failed to load bootcount\n", __func__);
|
|
|
|
/* Return the 0, if the call to dm_bootcount_get failed */
|
|
return ret ? 0 : val;
|
|
}
|
|
|
|
UCLASS_DRIVER(bootcount) = {
|
|
.name = "bootcount",
|
|
.id = UCLASS_BOOTCOUNT,
|
|
};
|