diff options
Diffstat (limited to 'lib/efi_loader/efi_rng.c')
| -rw-r--r-- | lib/efi_loader/efi_rng.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/lib/efi_loader/efi_rng.c b/lib/efi_loader/efi_rng.c index caef4085b0..a8a87007b6 100644 --- a/lib/efi_loader/efi_rng.c +++ b/lib/efi_loader/efi_rng.c @@ -3,6 +3,8 @@ * Copyright (c) 2019, Linaro Limited */ +#define LOG_CATEGORY LOGC_EFI + #include <common.h> #include <dm.h> #include <efi_loader.h> @@ -144,7 +146,33 @@ back: return EFI_EXIT(status); } -const struct efi_rng_protocol efi_rng_protocol = { +static const struct efi_rng_protocol efi_rng_protocol = { .get_info = rng_getinfo, .get_rng = getrng, }; + +/** + * efi_rng_register() - register EFI_RNG_PROTOCOL + * + * If a RNG device is available, the Random Number Generator Protocol is + * registered. + * + * Return: An error status is only returned if adding the protocol fails. + */ +efi_status_t efi_rng_register(void) +{ + efi_status_t ret; + struct udevice *dev; + + ret = platform_get_rng_device(&dev); + if (ret != EFI_SUCCESS) { + log_warning("Missing RNG device for EFI_RNG_PROTOCOL"); + return EFI_SUCCESS; + } + ret = efi_add_protocol(efi_root, &efi_guid_rng_protocol, + (void *)&efi_rng_protocol); + if (ret != EFI_SUCCESS) + log_err("Cannot install EFI_RNG_PROTOCOL"); + + return ret; +} |