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- // 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,
- };
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