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author | Alex Kiernan <alex.kiernan@gmail.com> | 2018-05-12 05:49:47 +0000 |
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committer | Tom Rini <trini@konsulko.com> | 2018-05-23 17:30:05 -0400 |
commit | b11ed7d602a48021d8ab96518ad80996d2b86077 (patch) | |
tree | 978f584d35a10d31c0776e6d9cbb080557242c31 /cmd/bootcount.c | |
parent | c4d7b7a6b8571030c5109e8cb75a85756156711e (diff) |
bootcount: Add bootcount command
Add a command to manipulate the bootcounter. This is useful if you can
run device recovery from inside U-Boot and need to reset the bootcounter
after executing that process as part of altbootcmd.
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Diffstat (limited to 'cmd/bootcount.c')
-rw-r--r-- | cmd/bootcount.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/cmd/bootcount.c b/cmd/bootcount.c new file mode 100644 index 0000000000..c358418ebe --- /dev/null +++ b/cmd/bootcount.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <common.h> +#include <command.h> +#include <bootcount.h> + +static int do_bootcount_print(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + printf("%lu\n", bootcount_load()); + return CMD_RET_SUCCESS; +} + +static int do_bootcount_reset(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + /* + * note that we're explicitly not resetting the environment + * variable, so you still have the old bootcounter available + */ + bootcount_store(0); + return CMD_RET_SUCCESS; +} + +static cmd_tbl_t bootcount_sub[] = { + U_BOOT_CMD_MKENT(print, 1, 1, do_bootcount_print, "", ""), + U_BOOT_CMD_MKENT(reset, 1, 1, do_bootcount_reset, "", ""), +}; + +static int do_bootcount(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + cmd_tbl_t *cp; + + if (argc < 2) + return CMD_RET_USAGE; + + /* drop initial "bootcount" arg */ + argc--; + argv++; + + cp = find_cmd_tbl(argv[0], bootcount_sub, ARRAY_SIZE(bootcount_sub)); + if (cp) + return cp->cmd(cmdtp, flag, argc, argv); + + return CMD_RET_USAGE; +} + +#if CONFIG_IS_ENABLED(SYS_LONGHELP) +static char bootcount_help_text[] = + "print - print current bootcounter\n" + "reset - reset the bootcounter" + ; +#endif + +U_BOOT_CMD(bootcount, 2, 1, do_bootcount, + "bootcount", +#if CONFIG_IS_ENABLED(SYS_LONGHELP) + bootcount_help_text +#endif +); |