efi_loader: startup the tpm device when installing the protocol

Due to U-Boot's lazy binding mentality the TPM is probed but not properly
initialized.  The user can startup the device from the command line
e.g 'tpm2 startup TPM2_SU_CLEAR'.  However we can initialize the TPM during
the TCG protocol installation,  which is easier to use overall.

Signed-off-by: Ilias Apalodimas <[email protected]>
Reviewed-by: Heinrich Schuchardt <[email protected]>

lib/efi_loader/efi_tcg2.c

@@ -18,6 +18,7 @@
 #include <smbios.h>
 #include <version_string.h>
 #include <tpm-v2.h>
+#include <tpm_api.h>
 #include <u-boot/hash-checksum.h>
 #include <u-boot/sha1.h>
 #include <u-boot/sha256.h>
@@ -1943,13 +1944,21 @@ efi_status_t efi_tcg2_register(void)
 	efi_status_t ret = EFI_SUCCESS;
 	struct udevice *dev;
 	struct efi_event *event;
+	u32 err;
 
 	ret = platform_get_tpm2_device(&dev);
 	if (ret != EFI_SUCCESS) {
 		log_warning("Unable to find TPMv2 device\n");
 		return EFI_SUCCESS;
 	}
 
+	/* initialize the TPM as early as possible. */
+	err = tpm_startup(dev, TPM_ST_CLEAR);
+	if (err) {
+		log_err("TPM startup failed\n");
+		goto fail;
+	}
+
 	ret = efi_init_event_log();
 	if (ret != EFI_SUCCESS)
 		goto fail;