diff options
Diffstat (limited to 'arch/arm/mach-imx/mx6/module_fuse.c')
| -rw-r--r-- | arch/arm/mach-imx/mx6/module_fuse.c | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/mx6/module_fuse.c b/arch/arm/mach-imx/mx6/module_fuse.c index c24d8279ed..a171e7b54d 100644 --- a/arch/arm/mach-imx/mx6/module_fuse.c +++ b/arch/arm/mach-imx/mx6/module_fuse.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * Copyright 2019 NXP + * Copyright 2019, 2022 NXP */ #include <common.h> @@ -10,6 +10,11 @@ #include <asm/arch/imx-regs.h> #include <asm/mach-imx/module_fuse.h> #include <linux/errno.h> +#include <command.h> +#include <hexdump.h> +#include <dm.h> +#include <malloc.h> +#include <rng.h> static struct fuse_entry_desc mx6_fuse_descs[] = { #if defined(CONFIG_MX6ULL) @@ -300,6 +305,48 @@ add_status: } } + if (IS_ENABLED(CONFIG_FSL_DCP_RNG)) { + /*Random number generation through RNG driver*/ + struct udevice *dev; + void *buf; + char keys[2][16] = {"otp_crypto_key", "otp_unique_key"}; + int ret = 0; + int nodeoff = fdt_node_offset_by_compatible(blob, -1, "fsl,imx28-dcp"); + + if (nodeoff < 0) { + printf("node to update the SoC serial number is not found.\n"); + return nodeoff; + } + rc = uclass_get_device(UCLASS_RNG, 0, &dev); + if (rc || !dev) { + printf("No RNG device\n"); + return rc; + } + + buf = malloc(16); + if (!buf) { + printf("Out of memory\n"); + return -ENOMEM; + } + + for (int i = 0; i < 2; i++) { + ret = dm_rng_read(dev, buf, 16); + if (ret) { + printf("Reading RNG failed\n"); + goto err; + } + + ret = fdt_setprop(blob, nodeoff, keys[i], buf, 16); + if (ret < 0) { + printf("WARNING: could not set %s key handle %s.\n", keys[i], fdt_strerror(ret)); + goto err; + } + } +err: + free(buf); + return ret; + } + return 0; } #endif |