RK3399 clk update problem - reproduction
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	kjopek_gmail.com
	Jan 6 2021, 4:49 PM

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RK3399 clk update problem - reproduction
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	#include <sys/param.h>
	#include <sys/mount.h>

	#include <ufs/ufs/ufsmount.h>
	#include <ufs/ufs/dinode.h>
	#include <ufs/ffs/fs.h>

	#include <err.h>
	#include <libufs.h>
	#include <stdint.h>
	#include <stdio.h>

	int
	main(int argc, char **argv)
	{
	struct uufsd disk;
	uint8_t block[1024 * 1024];
	int ii = 0;
	const ufs2_daddr_t block_no = 17664;

	if (argc != 2) {
	fprintf(stderr, "Usage: test_ffs <mountpoint\|device>\n");
	return (1);
	}

	if (ufs_disk_fillout(&disk, argv[1]) != 0)
	err(1, "ufs_disk_fillout failed");

	if (bread(&disk, block_no, block, sizeof(block)) == -1)
	err(1, "bread failed");

	for (ii = 0; ii < sizeof(block); ii++)
	printf("%02hhx%c", block[ii], ii % 16 == 0 ? '\n' : ' ');

	printf("\n");
	ufs_disk_close(&disk);
	return (0);
	}