// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2018 NXP */ /* * Boot command to get and set the PRIBLOB bitfield form the SCFGR register * of the CAAM IP. It is recommended to set this bitfield to 3 once your * encrypted boot image is ready, to prevent the generation of blobs usable * to decrypt an encrypted boot image. */ #include #include #include #include "../drivers/crypto/fsl_caam_internal.h" int do_priblob_write(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) { writel((readl(CAAM_SCFGR) & 0xFFFFFFFC) | 3, CAAM_SCFGR); printf("New priblob setting = 0x%x\n", readl(CAAM_SCFGR) & 0x3); return 0; } U_BOOT_CMD( set_priblob_bitfield, 1, 0, do_priblob_write, "Set the PRIBLOB bitfield to 3", "\n" " - Write 3 in PRIBLOB bitfield of SCFGR regiter of CAAM IP.\n" " Prevent the generation of blobs usable to decrypt an\n" " encrypted boot image." );