[U-Boot,18/25] tpm: Convert to use a device parameter

Message ID 20181106222142.94537-19-sjg@chromium.org
State New
Delegated to: Simon Glass
Headers show
Series
  • sandbox: Changes and improvements to support verified boot
Related show

Commit Message

Simon Glass Nov. 6, 2018, 10:21 p.m.
At present many TPM calls assume there is only one TPM in the system and
look up this TPM themselves. This is inconsistent with driver model, which
expects all driver methods to have a device parameter. Update the code to
correct this.

Also move to u8/32 instead of uint8_t/uint32_t to keep checkpatch happy.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 board/gdsys/a38x/controlcenterdc.c    |   8 +-
 board/gdsys/p1022/controlcenterd-id.c |  22 +-
 cmd/tpm-common.c                      |   8 +-
 cmd/tpm-v1.c                          | 122 +++++++--
 cmd/tpm-v2.c                          |  78 +++++-
 cmd/tpm_test.c                        | 371 +++++++++++++-------------
 include/tpm-common.h                  |  16 +-
 include/tpm-v1.h                      |  97 ++++---
 include/tpm-v2.h                      |  49 ++--
 lib/tpm-common.c                      |  16 +-
 lib/tpm-utils.h                       |   3 +-
 lib/tpm-v1.c                          | 136 +++++-----
 lib/tpm-v2.c                          |  60 +++--
 13 files changed, 611 insertions(+), 375 deletions(-)

Comments

Miquel Raynal Nov. 7, 2018, 7:56 a.m. | #1
Hi Simon,

Simon Glass <sjg@chromium.org> wrote on Tue,  6 Nov 2018 15:21:35 -0700:

> At present many TPM calls assume there is only one TPM in the system and
> look up this TPM themselves. This is inconsistent with driver model, which
> expects all driver methods to have a device parameter. Update the code to
> correct this.
> 
> Also move to u8/32 instead of uint8_t/uint32_t to keep checkpatch happy.
> 
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---

Thanks for the cleanup!

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>


Thanks,
Miquèl

Patch

diff --git a/board/gdsys/a38x/controlcenterdc.c b/board/gdsys/a38x/controlcenterdc.c
index 824a08f12af..be69f877f03 100644
--- a/board/gdsys/a38x/controlcenterdc.c
+++ b/board/gdsys/a38x/controlcenterdc.c
@@ -266,11 +266,15 @@  int board_fix_fdt(void *rw_fdt_blob)
 
 int last_stage_init(void)
 {
+	struct udevice *tpm;
+	int ret;
+
 #ifndef CONFIG_SPL_BUILD
 	ccdc_eth_init();
 #endif
-	if (tpm_init() || tpm_startup(TPM_ST_CLEAR) ||
-	    tpm_continue_self_test()) {
+	ret = get_tpm(&tpm);
+	if (ret || tpm_init(tpm) || tpm_startup(tpm, TPM_ST_CLEAR) ||
+	    tpm_continue_self_test(tpm)) {
 		return 1;
 	}
 
diff --git a/board/gdsys/p1022/controlcenterd-id.c b/board/gdsys/p1022/controlcenterd-id.c
index 7e082dff052..814e4f401de 100644
--- a/board/gdsys/p1022/controlcenterd-id.c
+++ b/board/gdsys/p1022/controlcenterd-id.c
@@ -969,19 +969,25 @@  end:
 #ifdef CCDM_FIRST_STAGE
 static int first_stage_init(void)
 {
-	int res = 0;
+	struct udevice *tpm;
+	int ret;
+
 	puts("CCDM S1\n");
-	if (tpm_init() || tpm_startup(TPM_ST_CLEAR))
+#ifndef CONFIG_SPL_BUILD
+	ccdc_eth_init();
+#endif
+	ret = get_tpm(&tpm);
+	if (ret || tpm_init(tpm) || tpm_startup(tpm, TPM_ST_CLEAR))
 		return 1;
-	res = first_stage_actions();
+	ret = first_stage_actions();
 #ifndef CCDM_SECOND_STAGE
-	if (!res) {
+	if (!ret) {
 		if (bl2_entry)
 			(*bl2_entry)();
-		res = 1;
+		ret = 1;
 	}
 #endif
-	return res;
+	return ret;
 }
 #endif
 
@@ -1021,10 +1027,12 @@  static int second_stage_init(void)
 	char *mac_path = NULL;
 	ulong image_addr;
 	loff_t image_size;
+	struct udevice *tpm;
 	uint32_t err;
 
 	printf("CCDM S2\n");
-	if (tpm_init())
+	ret = get_tpm(&tpm);
+	if (ret || tpm_init(tpm))
 		return 1;
 	err = tpm_startup(TPM_ST_CLEAR);
 	if (err != TPM_INVALID_POSTINIT)
diff --git a/cmd/tpm-common.c b/cmd/tpm-common.c
index 56443862c22..89f2aa001ba 100644
--- a/cmd/tpm-common.c
+++ b/cmd/tpm-common.c
@@ -264,10 +264,16 @@  int do_tpm_info(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 
 int do_tpm_init(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
+	struct udevice *dev;
+	int rc;
+
 	if (argc != 1)
 		return CMD_RET_USAGE;
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
-	return report_return_code(tpm_init());
+	return report_return_code(tpm_init(dev));
 }
 
 int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
diff --git a/cmd/tpm-v1.c b/cmd/tpm-v1.c
index 69870002d4f..465f7400721 100644
--- a/cmd/tpm-v1.c
+++ b/cmd/tpm-v1.c
@@ -14,7 +14,12 @@  static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag, int argc,
 			  char * const argv[])
 {
 	enum tpm_startup_type mode;
+	struct udevice *dev;
+	int rc;
 
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 	if (argc != 2)
 		return CMD_RET_USAGE;
 	if (!strcasecmp("TPM_ST_CLEAR", argv[1])) {
@@ -28,13 +33,19 @@  static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_FAILURE;
 	}
 
-	return report_return_code(tpm_startup(mode));
+	return report_return_code(tpm_startup(dev, mode));
 }
 
 static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag, int argc,
 				  char * const argv[])
 {
 	u32 index, perm, size;
+	struct udevice *dev;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 4)
 		return CMD_RET_USAGE;
@@ -42,22 +53,27 @@  static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag, int argc,
 	perm = simple_strtoul(argv[2], NULL, 0);
 	size = simple_strtoul(argv[3], NULL, 0);
 
-	return report_return_code(tpm_nv_define_space(index, perm, size));
+	return report_return_code(tpm_nv_define_space(dev, index, perm, size));
 }
 
 static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag, int argc,
 				char * const argv[])
 {
 	u32 index, count, rc;
+	struct udevice *dev;
 	void *data;
 
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+
 	if (argc != 4)
 		return CMD_RET_USAGE;
 	index = simple_strtoul(argv[1], NULL, 0);
 	data = (void *)simple_strtoul(argv[2], NULL, 0);
 	count = simple_strtoul(argv[3], NULL, 0);
 
-	rc = tpm_nv_read_value(index, data, count);
+	rc = tpm_nv_read_value(dev, index, data, count);
 	if (!rc) {
 		puts("area content:\n");
 		print_byte_string(data, count);
@@ -69,10 +85,15 @@  static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag, int argc,
 static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag, int argc,
 				 char * const argv[])
 {
+	struct udevice *dev;
 	u32 index, rc;
 	size_t count;
 	void *data;
 
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+
 	if (argc != 3)
 		return CMD_RET_USAGE;
 	index = simple_strtoul(argv[1], NULL, 0);
@@ -82,7 +103,7 @@  static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_FAILURE;
 	}
 
-	rc = tpm_nv_write_value(index, data, count);
+	rc = tpm_nv_write_value(dev, index, data, count);
 	free(data);
 
 	return report_return_code(rc);
@@ -91,8 +112,13 @@  static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag, int argc,
 static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag, int argc,
 			 char * const argv[])
 {
-	u32 index, rc;
 	u8 in_digest[20], out_digest[20];
+	struct udevice *dev;
+	u32 index, rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 3)
 		return CMD_RET_USAGE;
@@ -102,7 +128,7 @@  static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_FAILURE;
 	}
 
-	rc = tpm_extend(index, in_digest, out_digest);
+	rc = tpm_extend(dev, index, in_digest, out_digest);
 	if (!rc) {
 		puts("PCR value after execution of the command:\n");
 		print_byte_string(out_digest, sizeof(out_digest));
@@ -115,15 +141,20 @@  static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag, int argc,
 			   char * const argv[])
 {
 	u32 index, count, rc;
+	struct udevice *dev;
 	void *data;
 
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+
 	if (argc != 4)
 		return CMD_RET_USAGE;
 	index = simple_strtoul(argv[1], NULL, 0);
 	data = (void *)simple_strtoul(argv[2], NULL, 0);
 	count = simple_strtoul(argv[3], NULL, 0);
 
-	rc = tpm_pcr_read(index, data, count);
+	rc = tpm_pcr_read(dev, index, data, count);
 	if (!rc) {
 		puts("Named PCR content:\n");
 		print_byte_string(data, count);
@@ -135,27 +166,38 @@  static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag, int argc,
 static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag, int argc,
 					char * const argv[])
 {
+	struct udevice *dev;
 	u16 presence;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 2)
 		return CMD_RET_USAGE;
 	presence = (u16)simple_strtoul(argv[1], NULL, 0);
 
-	return report_return_code(tpm_tsc_physical_presence(presence));
+	return report_return_code(tpm_tsc_physical_presence(dev, presence));
 }
 
 static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag, int argc,
 			     char * const argv[])
 {
+	struct udevice *dev;
 	u32 count, rc;
 	void *data;
 
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+
 	if (argc != 3)
 		return CMD_RET_USAGE;
 	data = (void *)simple_strtoul(argv[1], NULL, 0);
 	count = simple_strtoul(argv[2], NULL, 0);
 
-	rc = tpm_read_pubek(data, count);
+	rc = tpm_read_pubek(dev, data, count);
 	if (!rc) {
 		puts("pubek value:\n");
 		print_byte_string(data, count);
@@ -167,13 +209,19 @@  static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag, int argc,
 static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag, int argc,
 					   char * const argv[])
 {
+	struct udevice *dev;
 	u8 state;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 2)
 		return CMD_RET_USAGE;
 	state = (u8)simple_strtoul(argv[1], NULL, 0);
 
-	return report_return_code(tpm_physical_set_deactivated(state));
+	return report_return_code(tpm_physical_set_deactivated(dev, state));
 }
 
 static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag, int argc,
@@ -182,6 +230,11 @@  static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag, int argc,
 	u32 cap_area, sub_cap, rc;
 	void *cap;
 	size_t count;
+	struct udevice *dev;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 5)
 		return CMD_RET_USAGE;
@@ -190,7 +243,7 @@  static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag, int argc,
 	cap = (void *)simple_strtoul(argv[3], NULL, 0);
 	count = simple_strtoul(argv[4], NULL, 0);
 
-	rc = tpm_get_capability(cap_area, sub_cap, cap, count);
+	rc = tpm_get_capability(dev, cap_area, sub_cap, cap, count);
 	if (!rc) {
 		puts("capability information:\n");
 		print_byte_string(cap, count);
@@ -232,6 +285,12 @@  static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag, int argc,
 			    char * const argv[])
 {
 	u32 index, perm, size;
+	struct udevice *dev;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc != 4)
 		return CMD_RET_USAGE;
@@ -243,14 +302,20 @@  static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag, int argc,
 	index = simple_strtoul(argv[2], NULL, 0);
 	perm = simple_strtoul(argv[3], NULL, 0);
 
-	return report_return_code(tpm_nv_define_space(index, perm, size));
+	return report_return_code(tpm_nv_define_space(dev, index, perm, size));
 }
 
 static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag, int argc,
 			  char * const argv[])
 {
 	u32 index, count, err;
+	struct udevice *dev;
 	void *data;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc < 3)
 		return CMD_RET_USAGE;
@@ -263,7 +328,7 @@  static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 	}
 
-	err = tpm_nv_read_value(index, data, count);
+	err = tpm_nv_read_value(dev, index, data, count);
 	if (!err) {
 		if (type_string_write_vars(argv[1], data, argv + 3)) {
 			printf("Couldn't write to variables\n");
@@ -279,7 +344,13 @@  static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag, int argc,
 			   char * const argv[])
 {
 	u32 index, count, err;
+	struct udevice *dev;
 	void *data;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc < 3)
 		return CMD_RET_USAGE;
@@ -297,7 +368,7 @@  static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 	}
 
-	err = tpm_nv_write_value(index, data, count);
+	err = tpm_nv_write_value(dev, index, data, count);
 	free(data);
 
 	return report_return_code(err);
@@ -309,8 +380,14 @@  static int do_tpm_oiap(cmd_tbl_t *cmdtp, int flag, int argc,
 		       char * const argv[])
 {
 	u32 auth_handle, err;
+	struct udevice *dev;
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
-	err = tpm_oiap(&auth_handle);
+	err = tpm_oiap(dev, &auth_handle);
 
 	return report_return_code(err);
 }
@@ -324,6 +401,11 @@  static int do_tpm_load_key_by_sha1(cmd_tbl_t *cmdtp, int flag, int argc, char *
 	u8 usage_auth[DIGEST_LENGTH];
 	u8 parent_hash[DIGEST_LENGTH];
 	void *key;
+	struct udevice *dev;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc < 5)
 		return CMD_RET_USAGE;
@@ -360,6 +442,11 @@  static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag, int argc,
 	u32 parent_handle, key_len, key_handle, err;
 	u8 usage_auth[DIGEST_LENGTH];
 	void *key;
+	struct udevice *dev;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc < 5)
 		return CMD_RET_USAGE;
@@ -386,6 +473,11 @@  static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag, int argc,
 	u8 usage_auth[DIGEST_LENGTH];
 	u8 pub_key_buffer[TPM_PUBKEY_MAX_LENGTH];
 	size_t pub_key_len = sizeof(pub_key_buffer);
+	struct udevice *dev;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
 
 	if (argc < 3)
 		return CMD_RET_USAGE;
diff --git a/cmd/tpm-v2.c b/cmd/tpm-v2.c
index ffbf35a75c5..bb51834c478 100644
--- a/cmd/tpm-v2.c
+++ b/cmd/tpm-v2.c
@@ -16,7 +16,12 @@  static int do_tpm2_startup(cmd_tbl_t *cmdtp, int flag, int argc,
 			   char * const argv[])
 {
 	enum tpm2_startup_types mode;
+	struct udevice *dev;
+	int ret;
 
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 	if (argc != 2)
 		return CMD_RET_USAGE;
 
@@ -29,14 +34,19 @@  static int do_tpm2_startup(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_FAILURE;
 	}
 
-	return report_return_code(tpm2_startup(mode));
+	return report_return_code(tpm2_startup(dev, mode));
 }
 
 static int do_tpm2_self_test(cmd_tbl_t *cmdtp, int flag, int argc,
 			     char * const argv[])
 {
 	enum tpm2_yes_no full_test;
+	struct udevice *dev;
+	int ret;
 
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 	if (argc != 2)
 		return CMD_RET_USAGE;
 
@@ -49,7 +59,7 @@  static int do_tpm2_self_test(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_FAILURE;
 	}
 
-	return report_return_code(tpm2_self_test(full_test));
+	return report_return_code(tpm2_self_test(dev, full_test));
 }
 
 static int do_tpm2_clear(cmd_tbl_t *cmdtp, int flag, int argc,
@@ -58,6 +68,12 @@  static int do_tpm2_clear(cmd_tbl_t *cmdtp, int flag, int argc,
 	u32 handle = 0;
 	const char *pw = (argc < 3) ? NULL : argv[2];
 	const ssize_t pw_sz = pw ? strlen(pw) : 0;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (argc < 2 || argc > 3)
 		return CMD_RET_USAGE;
@@ -72,7 +88,7 @@  static int do_tpm2_clear(cmd_tbl_t *cmdtp, int flag, int argc,
 	else
 		return CMD_RET_USAGE;
 
-	return report_return_code(tpm2_clear(handle, pw, pw_sz));
+	return report_return_code(tpm2_clear(dev, handle, pw, pw_sz));
 }
 
 static int do_tpm2_pcr_extend(cmd_tbl_t *cmdtp, int flag, int argc,
@@ -88,7 +104,7 @@  static int do_tpm2_pcr_extend(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (argc != 3)
 		return CMD_RET_USAGE;
 
-	ret = uclass_first_device_err(UCLASS_TPM, &dev);
+	ret = get_tpm(&dev);
 	if (ret)
 		return ret;
 
@@ -99,7 +115,7 @@  static int do_tpm2_pcr_extend(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (index >= priv->pcr_count)
 		return -EINVAL;
 
-	rc = tpm2_pcr_extend(index, digest);
+	rc = tpm2_pcr_extend(dev, index, digest);
 
 	unmap_sysmem(digest);
 
@@ -119,7 +135,7 @@  static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (argc != 3)
 		return CMD_RET_USAGE;
 
-	ret = uclass_first_device_err(UCLASS_TPM, &dev);
+	ret = get_tpm(&dev);
 	if (ret)
 		return ret;
 
@@ -133,7 +149,7 @@  static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag, int argc,
 
 	data = map_sysmem(simple_strtoul(argv[2], NULL, 0), 0);
 
-	rc = tpm2_pcr_read(index, priv->pcr_select_min, data, &updates);
+	rc = tpm2_pcr_read(dev, index, priv->pcr_select_min, data, &updates);
 	if (!rc) {
 		printf("PCR #%u content (%d known updates):\n", index, updates);
 		print_byte_string(data, TPM2_DIGEST_LEN);
@@ -151,6 +167,12 @@  static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag, int argc,
 	u8 *data;
 	size_t count;
 	int i, j;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (argc != 5)
 		return CMD_RET_USAGE;
@@ -160,7 +182,7 @@  static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag, int argc,
 	data = map_sysmem(simple_strtoul(argv[3], NULL, 0), 0);
 	count = simple_strtoul(argv[4], NULL, 0);
 
-	rc = tpm2_get_capability(capability, property, data, count);
+	rc = tpm2_get_capability(dev, capability, property, data, count);
 	if (rc)
 		goto unmap_data;
 
@@ -186,6 +208,12 @@  static int do_tpm_dam_reset(cmd_tbl_t *cmdtp, int flag, int argc,
 {
 	const char *pw = (argc < 2) ? NULL : argv[1];
 	const ssize_t pw_sz = pw ? strlen(pw) : 0;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (argc > 2)
 		return CMD_RET_USAGE;
@@ -193,7 +221,7 @@  static int do_tpm_dam_reset(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (pw_sz > TPM2_DIGEST_LEN)
 		return -EINVAL;
 
-	return report_return_code(tpm2_dam_reset(pw, pw_sz));
+	return report_return_code(tpm2_dam_reset(dev, pw, pw_sz));
 }
 
 static int do_tpm_dam_parameters(cmd_tbl_t *cmdtp, int flag, int argc,
@@ -208,6 +236,12 @@  static int do_tpm_dam_parameters(cmd_tbl_t *cmdtp, int flag, int argc,
 	unsigned long int max_tries;
 	unsigned long int recovery_time;
 	unsigned long int lockout_recovery;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (argc < 4 || argc > 5)
 		return CMD_RET_USAGE;
@@ -229,7 +263,7 @@  static int do_tpm_dam_parameters(cmd_tbl_t *cmdtp, int flag, int argc,
 	log(LOGC_NONE, LOGL_INFO, "- recoveryTime: %lu\n", recovery_time);
 	log(LOGC_NONE, LOGL_INFO, "- lockoutRecovery: %lu\n", lockout_recovery);
 
-	return report_return_code(tpm2_dam_parameters(pw, pw_sz, max_tries,
+	return report_return_code(tpm2_dam_parameters(dev, pw, pw_sz, max_tries,
 						      recovery_time,
 						      lockout_recovery));
 }
@@ -242,6 +276,12 @@  static int do_tpm_change_auth(cmd_tbl_t *cmdtp, int flag, int argc,
 	const char *oldpw = (argc == 3) ? NULL : argv[3];
 	const ssize_t newpw_sz = strlen(newpw);
 	const ssize_t oldpw_sz = oldpw ? strlen(oldpw) : 0;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (argc < 3 || argc > 4)
 		return CMD_RET_USAGE;
@@ -260,7 +300,7 @@  static int do_tpm_change_auth(cmd_tbl_t *cmdtp, int flag, int argc,
 	else
 		return CMD_RET_USAGE;
 
-	return report_return_code(tpm2_change_auth(handle, newpw, newpw_sz,
+	return report_return_code(tpm2_change_auth(dev, handle, newpw, newpw_sz,
 						   oldpw, oldpw_sz));
 }
 
@@ -271,6 +311,12 @@  static int do_tpm_pcr_setauthpolicy(cmd_tbl_t *cmdtp, int flag, int argc,
 	char *key = argv[2];
 	const char *pw = (argc < 4) ? NULL : argv[3];
 	const ssize_t pw_sz = pw ? strlen(pw) : 0;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (strlen(key) != TPM2_DIGEST_LEN)
 		return -EINVAL;
@@ -278,7 +324,7 @@  static int do_tpm_pcr_setauthpolicy(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (argc < 3 || argc > 4)
 		return CMD_RET_USAGE;
 
-	return report_return_code(tpm2_pcr_setauthpolicy(pw, pw_sz, index,
+	return report_return_code(tpm2_pcr_setauthpolicy(dev, pw, pw_sz, index,
 							 key));
 }
 
@@ -290,6 +336,12 @@  static int do_tpm_pcr_setauthvalue(cmd_tbl_t *cmdtp, int flag,
 	const ssize_t key_sz = strlen(key);
 	const char *pw = (argc < 4) ? NULL : argv[3];
 	const ssize_t pw_sz = pw ? strlen(pw) : 0;
+	struct udevice *dev;
+	int ret;
+
+	ret = get_tpm(&dev);
+	if (ret)
+		return ret;
 
 	if (strlen(key) != TPM2_DIGEST_LEN)
 		return -EINVAL;
@@ -297,7 +349,7 @@  static int do_tpm_pcr_setauthvalue(cmd_tbl_t *cmdtp, int flag,
 	if (argc < 3 || argc > 4)
 		return CMD_RET_USAGE;
 
-	return report_return_code(tpm2_pcr_setauthvalue(pw, pw_sz, index,
+	return report_return_code(tpm2_pcr_setauthvalue(dev, pw, pw_sz, index,
 							key, key_sz));
 }
 
diff --git a/cmd/tpm_test.c b/cmd/tpm_test.c
index f21ad5d3cf9..c396b29f523 100644
--- a/cmd/tpm_test.c
+++ b/cmd/tpm_test.c
@@ -7,10 +7,11 @@ 
 #include <command.h>
 #include <environment.h>
 #include <tpm-v1.h>
+#include "tpm-user-utils.h"
 
 /* Prints error and returns on failure */
 #define TPM_CHECK(tpm_command) do { \
-	uint32_t result; \
+	u32 result; \
 	\
 	result = (tpm_command); \
 	if (result != TPM_SUCCESS) { \
@@ -28,26 +29,27 @@ 
 #define PHYS_PRESENCE		4
 #define PRESENCE		8
 
-static uint32_t TlclStartupIfNeeded(void)
+static u32 TlclStartupIfNeeded(struct udevice *dev)
 {
-	uint32_t result = tpm_startup(TPM_ST_CLEAR);
+	u32 result = tpm_startup(dev, TPM_ST_CLEAR);
 
 	return result == TPM_INVALID_POSTINIT ? TPM_SUCCESS : result;
 }
 
-static int test_timer(void)
+static int test_timer(struct udevice *dev)
 {
 	printf("get_timer(0) = %lu\n", get_timer(0));
+
 	return 0;
 }
 
-static uint32_t tpm_get_flags(uint8_t *disable, uint8_t *deactivated,
-			      uint8_t *nvlocked)
+static u32 tpm_get_flags(struct udevice *dev, u8 *disable,
+			 u8 *deactivated, u8 *nvlocked)
 {
 	struct tpm_permanent_flags pflags;
-	uint32_t result;
+	u32 result;
 
-	result = tpm_get_permanent_flags(&pflags);
+	result = tpm_get_permanent_flags(dev, &pflags);
 	if (result)
 		return result;
 	if (disable)
@@ -62,79 +64,79 @@  static uint32_t tpm_get_flags(uint8_t *disable, uint8_t *deactivated,
 	return 0;
 }
 
-static uint32_t tpm_nv_write_value_lock(uint32_t index)
+static u32 tpm_nv_write_value_lock(struct udevice *dev, u32 index)
 {
 	debug("TPM: Write lock 0x%x\n", index);
 
-	return tpm_nv_write_value(index, NULL, 0);
+	return tpm_nv_write_value(dev, index, NULL, 0);
 }
 
-static int tpm_is_owned(void)
+static int tpm_is_owned(struct udevice *dev)
 {
-	uint8_t response[TPM_PUBEK_SIZE];
-	uint32_t result;
+	u8 response[TPM_PUBEK_SIZE];
+	u32 result;
 
-	result = tpm_read_pubek(response, sizeof(response));
+	result = tpm_read_pubek(dev, response, sizeof(response));
 
 	return result != TPM_SUCCESS;
 }
 
-static int test_early_extend(void)
+static int test_early_extend(struct udevice *dev)
 {
-	uint8_t value_in[20];
-	uint8_t value_out[20];
+	u8 value_in[20];
+	u8 value_out[20];
 
 	printf("Testing earlyextend ...");
-	tpm_init();
-	TPM_CHECK(tpm_startup(TPM_ST_CLEAR));
-	TPM_CHECK(tpm_continue_self_test());
-	TPM_CHECK(tpm_extend(1, value_in, value_out));
+	tpm_init(dev);
+	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
+	TPM_CHECK(tpm_continue_self_test(dev));
+	TPM_CHECK(tpm_extend(dev, 1, value_in, value_out));
 	printf("done\n");
 	return 0;
 }
 
-static int test_early_nvram(void)
+static int test_early_nvram(struct udevice *dev)
 {
-	uint32_t x;
+	u32 x;
 
 	printf("Testing earlynvram ...");
-	tpm_init();
-	TPM_CHECK(tpm_startup(TPM_ST_CLEAR));
-	TPM_CHECK(tpm_continue_self_test());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_nv_read_value(INDEX0, (uint8_t *)&x, sizeof(x)));
+	tpm_init(dev);
+	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
+	TPM_CHECK(tpm_continue_self_test(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (u8 *)&x, sizeof(x)));
 	printf("done\n");
 	return 0;
 }
 
-static int test_early_nvram2(void)
+static int test_early_nvram2(struct udevice *dev)
 {
-	uint32_t x;
+	u32 x;
 
 	printf("Testing earlynvram2 ...");
-	tpm_init();
-	TPM_CHECK(tpm_startup(TPM_ST_CLEAR));
-	TPM_CHECK(tpm_continue_self_test());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_nv_write_value(INDEX0, (uint8_t *)&x, sizeof(x)));
+	tpm_init(dev);
+	TPM_CHECK(tpm_startup(dev, TPM_ST_CLEAR));
+	TPM_CHECK(tpm_continue_self_test(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (u8 *)&x, sizeof(x)));
 	printf("done\n");
 	return 0;
 }
 
-static int test_enable(void)
+static int test_enable(struct udevice *dev)
 {
-	uint8_t disable = 0, deactivated = 0;
+	u8 disable = 0, deactivated = 0;
 
 	printf("Testing enable ...\n");
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_self_test_full());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_get_flags(&disable, &deactivated, NULL));
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_self_test_full(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
 	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
-	TPM_CHECK(tpm_physical_enable());
-	TPM_CHECK(tpm_physical_set_deactivated(0));
-	TPM_CHECK(tpm_get_flags(&disable, &deactivated, NULL));
+	TPM_CHECK(tpm_physical_enable(dev));
+	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
+	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
 	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
 	if (disable == 1 || deactivated == 1)
 		printf("\tfailed to enable or activate\n");
@@ -147,27 +149,27 @@  static int test_enable(void)
 	reset_cpu(0); \
 } while (0)
 
-static int test_fast_enable(void)
+static int test_fast_enable(struct udevice *dev)
 {
-	uint8_t disable = 0, deactivated = 0;
+	u8 disable = 0, deactivated = 0;
 	int i;
 
 	printf("Testing fastenable ...\n");
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_self_test_full());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_get_flags(&disable, &deactivated, NULL));
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_self_test_full(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
 	printf("\tdisable is %d, deactivated is %d\n", disable, deactivated);
 	for (i = 0; i < 2; i++) {
-		TPM_CHECK(tpm_force_clear());
-		TPM_CHECK(tpm_get_flags(&disable, &deactivated, NULL));
+		TPM_CHECK(tpm_force_clear(dev));
+		TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
 		printf("\tdisable is %d, deactivated is %d\n", disable,
 		       deactivated);
 		assert(disable == 1 && deactivated == 1);
-		TPM_CHECK(tpm_physical_enable());
-		TPM_CHECK(tpm_physical_set_deactivated(0));
-		TPM_CHECK(tpm_get_flags(&disable, &deactivated, NULL));
+		TPM_CHECK(tpm_physical_enable(dev));
+		TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
+		TPM_CHECK(tpm_get_flags(dev, &disable, &deactivated, NULL));
 		printf("\tdisable is %d, deactivated is %d\n", disable,
 		       deactivated);
 		assert(disable == 0 && deactivated == 0);
@@ -176,105 +178,103 @@  static int test_fast_enable(void)
 	return 0;
 }
 
-static int test_global_lock(void)
+static int test_global_lock(struct udevice *dev)
 {
-	uint32_t zero = 0;
-	uint32_t result;
-	uint32_t x;
+	u32 zero = 0;
+	u32 result;
+	u32 x;
 
 	printf("Testing globallock ...\n");
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_self_test_full());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_nv_read_value(INDEX0, (uint8_t *)&x, sizeof(x)));
-	TPM_CHECK(tpm_nv_write_value(INDEX0, (uint8_t *)&zero,
-				     sizeof(uint32_t)));
-	TPM_CHECK(tpm_nv_read_value(INDEX1, (uint8_t *)&x, sizeof(x)));
-	TPM_CHECK(tpm_nv_write_value(INDEX1, (uint8_t *)&zero,
-				     sizeof(uint32_t)));
-	TPM_CHECK(tpm_set_global_lock());
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_self_test_full(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (u8 *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (u8 *)&zero, sizeof(u32)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (u8 *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (u8 *)&zero, sizeof(u32)));
+	TPM_CHECK(tpm_set_global_lock(dev));
 	/* Verifies that write to index0 fails */
 	x = 1;
-	result = tpm_nv_write_value(INDEX0, (uint8_t *)&x, sizeof(x));
+	result = tpm_nv_write_value(dev, INDEX0, (u8 *)&x, sizeof(x));
 	assert(result == TPM_AREA_LOCKED);
-	TPM_CHECK(tpm_nv_read_value(INDEX0, (uint8_t *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (u8 *)&x, sizeof(x)));
 	assert(x == 0);
 	/* Verifies that write to index1 is still possible */
 	x = 2;
-	TPM_CHECK(tpm_nv_write_value(INDEX1, (uint8_t *)&x, sizeof(x)));
-	TPM_CHECK(tpm_nv_read_value(INDEX1, (uint8_t *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_write_value(dev, INDEX1, (u8 *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (u8 *)&x, sizeof(x)));
 	assert(x == 2);
 	/* Turns off PP */
-	tpm_tsc_physical_presence(PHYS_PRESENCE);
+	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
 	/* Verifies that write to index1 fails */
 	x = 3;
-	result = tpm_nv_write_value(INDEX1, (uint8_t *)&x, sizeof(x));
+	result = tpm_nv_write_value(dev, INDEX1, (u8 *)&x, sizeof(x));
 	assert(result == TPM_BAD_PRESENCE);
-	TPM_CHECK(tpm_nv_read_value(INDEX1, (uint8_t *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (u8 *)&x, sizeof(x)));
 	assert(x == 2);
 	printf("\tdone\n");
 	return 0;
 }
 
-static int test_lock(void)
+static int test_lock(struct udevice *dev)
 {
 	printf("Testing lock ...\n");
-	tpm_init();
-	tpm_startup(TPM_ST_CLEAR);
-	tpm_self_test_full();
-	tpm_tsc_physical_presence(PRESENCE);
-	tpm_nv_write_value_lock(INDEX0);
+	tpm_init(dev);
+	tpm_startup(dev, TPM_ST_CLEAR);
+	tpm_self_test_full(dev);
+	tpm_tsc_physical_presence(dev, PRESENCE);
+	tpm_nv_write_value_lock(dev, INDEX0);
 	printf("\tLocked 0x%x\n", INDEX0);
 	printf("\tdone\n");
 	return 0;
 }
 
-static void initialise_spaces(void)
+static void initialise_spaces(struct udevice *dev)
 {
-	uint32_t zero = 0;
-	uint32_t perm = TPM_NV_PER_WRITE_STCLEAR | TPM_NV_PER_PPWRITE;
+	u32 zero = 0;
+	u32 perm = TPM_NV_PER_WRITE_STCLEAR | TPM_NV_PER_PPWRITE;
 
 	printf("\tInitialising spaces\n");
-	tpm_nv_set_locked();  /* useful only the first time */
-	tpm_nv_define_space(INDEX0, perm, 4);
-	tpm_nv_write_value(INDEX0, (uint8_t *)&zero, 4);
-	tpm_nv_define_space(INDEX1, perm, 4);
-	tpm_nv_write_value(INDEX1, (uint8_t *)&zero, 4);
-	tpm_nv_define_space(INDEX2, perm, 4);
-	tpm_nv_write_value(INDEX2, (uint8_t *)&zero, 4);
-	tpm_nv_define_space(INDEX3, perm, 4);
-	tpm_nv_write_value(INDEX3, (uint8_t *)&zero, 4);
+	tpm_nv_set_locked(dev);  /* useful only the first time */
+	tpm_nv_define_space(dev, INDEX0, perm, 4);
+	tpm_nv_write_value(dev, INDEX0, (u8 *)&zero, 4);
+	tpm_nv_define_space(dev, INDEX1, perm, 4);
+	tpm_nv_write_value(dev, INDEX1, (u8 *)&zero, 4);
+	tpm_nv_define_space(dev, INDEX2, perm, 4);
+	tpm_nv_write_value(dev, INDEX2, (u8 *)&zero, 4);
+	tpm_nv_define_space(dev, INDEX3, perm, 4);
+	tpm_nv_write_value(dev, INDEX3, (u8 *)&zero, 4);
 	perm = TPM_NV_PER_READ_STCLEAR | TPM_NV_PER_WRITE_STCLEAR |
 		TPM_NV_PER_PPWRITE;
-	tpm_nv_define_space(INDEX_INITIALISED, perm, 1);
+	tpm_nv_define_space(dev, INDEX_INITIALISED, perm, 1);
 }
 
-static int test_readonly(void)
+static int test_readonly(struct udevice *dev)
 {
-	uint8_t c;
-	uint32_t index_0, index_1, index_2, index_3;
+	u8 c;
+	u32 index_0, index_1, index_2, index_3;
 	int read0, read1, read2, read3;
 
 	printf("Testing readonly ...\n");
-	tpm_init();
-	tpm_startup(TPM_ST_CLEAR);
-	tpm_self_test_full();
-	tpm_tsc_physical_presence(PRESENCE);
+	tpm_init(dev);
+	tpm_startup(dev, TPM_ST_CLEAR);
+	tpm_self_test_full(dev);
+	tpm_tsc_physical_presence(dev, PRESENCE);
 	/*
 	 * Checks if initialisation has completed by trying to read-lock a
 	 * space that's created at the end of initialisation
 	 */
-	if (tpm_nv_read_value(INDEX_INITIALISED, &c, 0) == TPM_BADINDEX) {
+	if (tpm_nv_read_value(dev, INDEX_INITIALISED, &c, 0) == TPM_BADINDEX) {
 		/* The initialisation did not complete */
-		initialise_spaces();
+		initialise_spaces(dev);
 	}
 
 	/* Checks if spaces are OK or messed up */
-	read0 = tpm_nv_read_value(INDEX0, (uint8_t *)&index_0, sizeof(index_0));
-	read1 = tpm_nv_read_value(INDEX1, (uint8_t *)&index_1, sizeof(index_1));
-	read2 = tpm_nv_read_value(INDEX2, (uint8_t *)&index_2, sizeof(index_2));
-	read3 = tpm_nv_read_value(INDEX3, (uint8_t *)&index_3, sizeof(index_3));
+	read0 = tpm_nv_read_value(dev, INDEX0, (u8 *)&index_0, sizeof(index_0));
+	read1 = tpm_nv_read_value(dev, INDEX1, (u8 *)&index_1, sizeof(index_1));
+	read2 = tpm_nv_read_value(dev, INDEX2, (u8 *)&index_2, sizeof(index_2));
+	read3 = tpm_nv_read_value(dev, INDEX3, (u8 *)&index_3, sizeof(index_3));
 	if (read0 || read1 || read2 || read3) {
 		printf("Invalid contents\n");
 		return 0;
@@ -285,12 +285,14 @@  static int test_readonly(void)
 	 * I really wish I could use the imperative.
 	 */
 	index_0 += 1;
-	if (tpm_nv_write_value(INDEX0, (uint8_t *)&index_0, sizeof(index_0) !=
+	if (tpm_nv_write_value(dev, INDEX0, (u8 *)&index_0,
+			       sizeof(index_0) !=
 		TPM_SUCCESS)) {
 		pr_err("\tcould not write index 0\n");
 	}
-	tpm_nv_write_value_lock(INDEX0);
-	if (tpm_nv_write_value(INDEX0, (uint8_t *)&index_0, sizeof(index_0)) ==
+	tpm_nv_write_value_lock(dev, INDEX0);
+	if (tpm_nv_write_value(dev, INDEX0, (u8 *)&index_0,
+			       sizeof(index_0)) ==
 			TPM_SUCCESS)
 		pr_err("\tindex 0 is not locked\n");
 
@@ -298,49 +300,49 @@  static int test_readonly(void)
 	return 0;
 }
 
-static int test_redefine_unowned(void)
+static int test_redefine_unowned(struct udevice *dev)
 {
-	uint32_t perm;
-	uint32_t result;
-	uint32_t x;
+	u32 perm;
+	u32 result;
+	u32 x;
 
 	printf("Testing redefine_unowned ...");
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_self_test_full());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	assert(!tpm_is_owned());
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_self_test_full(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	assert(!tpm_is_owned(dev));
 
 	/* Ensures spaces exist. */
-	TPM_CHECK(tpm_nv_read_value(INDEX0, (uint8_t *)&x, sizeof(x)));
-	TPM_CHECK(tpm_nv_read_value(INDEX1, (uint8_t *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX0, (u8 *)&x, sizeof(x)));
+	TPM_CHECK(tpm_nv_read_value(dev, INDEX1, (u8 *)&x, sizeof(x)));
 
 	/* Redefines spaces a couple of times. */
 	perm = TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK;
-	TPM_CHECK(tpm_nv_define_space(INDEX0, perm, 2 * sizeof(uint32_t)));
-	TPM_CHECK(tpm_nv_define_space(INDEX0, perm, sizeof(uint32_t)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, 2 * sizeof(u32)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX0, perm, sizeof(u32)));
 	perm = TPM_NV_PER_PPWRITE;
-	TPM_CHECK(tpm_nv_define_space(INDEX1, perm, 2 * sizeof(uint32_t)));
-	TPM_CHECK(tpm_nv_define_space(INDEX1, perm, sizeof(uint32_t)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(u32)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(u32)));
 
 	/* Sets the global lock */
-	tpm_set_global_lock();
+	tpm_set_global_lock(dev);
 
 	/* Verifies that index0 cannot be redefined */
-	result = tpm_nv_define_space(INDEX0, perm, sizeof(uint32_t));
+	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(u32));
 	assert(result == TPM_AREA_LOCKED);
 
 	/* Checks that index1 can */
-	TPM_CHECK(tpm_nv_define_space(INDEX1, perm, 2 * sizeof(uint32_t)));
-	TPM_CHECK(tpm_nv_define_space(INDEX1, perm, sizeof(uint32_t)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, 2 * sizeof(u32)));
+	TPM_CHECK(tpm_nv_define_space(dev, INDEX1, perm, sizeof(u32)));
 
 	/* Turns off PP */
-	tpm_tsc_physical_presence(PHYS_PRESENCE);
+	tpm_tsc_physical_presence(dev, PHYS_PRESENCE);
 
 	/* Verifies that neither index0 nor index1 can be redefined */
-	result = tpm_nv_define_space(INDEX0, perm, sizeof(uint32_t));
+	result = tpm_nv_define_space(dev, INDEX0, perm, sizeof(u32));
 	assert(result == TPM_BAD_PRESENCE);
-	result = tpm_nv_define_space(INDEX1, perm, sizeof(uint32_t));
+	result = tpm_nv_define_space(dev, INDEX1, perm, sizeof(u32));
 	assert(result == TPM_BAD_PRESENCE);
 
 	printf("done\n");
@@ -350,38 +352,39 @@  static int test_redefine_unowned(void)
 #define PERMPPGL (TPM_NV_PER_PPWRITE | TPM_NV_PER_GLOBALLOCK)
 #define PERMPP TPM_NV_PER_PPWRITE
 
-static int test_space_perm(void)
+static int test_space_perm(struct udevice *dev)
 {
-	uint32_t perm;
+	u32 perm;
 
 	printf("Testing spaceperm ...");
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_continue_self_test());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_get_permissions(INDEX0, &perm));
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_continue_self_test(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_get_permissions(dev, INDEX0, &perm));
 	assert((perm & PERMPPGL) == PERMPPGL);
-	TPM_CHECK(tpm_get_permissions(INDEX1, &perm));
+	TPM_CHECK(tpm_get_permissions(dev, INDEX1, &perm));
 	assert((perm & PERMPP) == PERMPP);
 	printf("done\n");
 	return 0;
 }
 
-static int test_startup(void)
+static int test_startup(struct udevice *dev)
 {
-	uint32_t result;
+	u32 result;
+
 	printf("Testing startup ...\n");
 
-	tpm_init();
-	result = tpm_startup(TPM_ST_CLEAR);
+	tpm_init(dev);
+	result = tpm_startup(dev, TPM_ST_CLEAR);
 	if (result != 0 && result != TPM_INVALID_POSTINIT)
 		printf("\ttpm startup failed with 0x%x\n", result);
-	result = tpm_get_flags(NULL, NULL, NULL);
+	result = tpm_get_flags(dev, NULL, NULL, NULL);
 	if (result != 0)
 		printf("\ttpm getflags failed with 0x%x\n", result);
 	printf("\texecuting SelfTestFull\n");
-	tpm_self_test_full();
-	result = tpm_get_flags(NULL, NULL, NULL);
+	tpm_self_test_full(dev);
+	result = tpm_get_flags(dev, NULL, NULL, NULL);
 	if (result != 0)
 		printf("\ttpm getflags failed with 0x%x\n", result);
 	printf("\tdone\n");
@@ -394,7 +397,7 @@  static int test_startup(void)
  */
 #define TTPM_CHECK(op, time_limit) do { \
 	ulong start, time; \
-	uint32_t __result; \
+	u32 __result; \
 	\
 	start = get_timer(0); \
 	__result = op; \
@@ -410,45 +413,45 @@  static int test_startup(void)
 } while (0)
 
 
-static int test_timing(void)
+static int test_timing(struct udevice *dev)
 {
-	uint32_t x;
-	uint8_t in[20], out[20];
+	u8 in[20], out[20];
+	u32 x;
 
 	printf("Testing timing ...");
-	tpm_init();
-	TTPM_CHECK(TlclStartupIfNeeded(), 50);
-	TTPM_CHECK(tpm_continue_self_test(), 100);
-	TTPM_CHECK(tpm_self_test_full(), 1000);
-	TTPM_CHECK(tpm_tsc_physical_presence(PRESENCE), 100);
-	TTPM_CHECK(tpm_nv_write_value(INDEX0, (uint8_t *)&x, sizeof(x)), 100);
-	TTPM_CHECK(tpm_nv_read_value(INDEX0, (uint8_t *)&x, sizeof(x)), 100);
-	TTPM_CHECK(tpm_extend(0, in, out), 200);
-	TTPM_CHECK(tpm_set_global_lock(), 50);
-	TTPM_CHECK(tpm_tsc_physical_presence(PHYS_PRESENCE), 100);
+	tpm_init(dev);
+	TTPM_CHECK(TlclStartupIfNeeded(dev), 50);
+	TTPM_CHECK(tpm_continue_self_test(dev), 100);
+	TTPM_CHECK(tpm_self_test_full(dev), 1000);
+	TTPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE), 100);
+	TTPM_CHECK(tpm_nv_write_value(dev, INDEX0, (u8 *)&x, sizeof(x)), 100);
+	TTPM_CHECK(tpm_nv_read_value(dev, INDEX0, (u8 *)&x, sizeof(x)), 100);
+	TTPM_CHECK(tpm_extend(dev, 0, in, out), 200);
+	TTPM_CHECK(tpm_set_global_lock(dev), 50);
+	TTPM_CHECK(tpm_tsc_physical_presence(dev, PHYS_PRESENCE), 100);
 	printf("done\n");
 	return 0;
 }
 
 #define TPM_MAX_NV_WRITES_NOOWNER 64
 
-static int test_write_limit(void)
+static int test_write_limit(struct udevice *dev)
 {
-	printf("Testing writelimit ...\n");
+	u32 result;
 	int i;
-	uint32_t result;
 
-	tpm_init();
-	TPM_CHECK(TlclStartupIfNeeded());
-	TPM_CHECK(tpm_self_test_full());
-	TPM_CHECK(tpm_tsc_physical_presence(PRESENCE));
-	TPM_CHECK(tpm_force_clear());
-	TPM_CHECK(tpm_physical_enable());
-	TPM_CHECK(tpm_physical_set_deactivated(0));
+	printf("Testing writelimit ...\n");
+	tpm_init(dev);
+	TPM_CHECK(TlclStartupIfNeeded(dev));
+	TPM_CHECK(tpm_self_test_full(dev));
+	TPM_CHECK(tpm_tsc_physical_presence(dev, PRESENCE));
+	TPM_CHECK(tpm_force_clear(dev));
+	TPM_CHECK(tpm_physical_enable(dev));
+	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
 
 	for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
 		printf("\twriting %d\n", i);
-		result = tpm_nv_write_value(INDEX0, (uint8_t *)&i, sizeof(i));
+		result = tpm_nv_write_value(dev, INDEX0, (u8 *)&i, sizeof(i));
 		switch (result) {
 		case TPM_SUCCESS:
 			break;
@@ -461,12 +464,12 @@  static int test_write_limit(void)
 	}
 
 	/* Reset write count */
-	TPM_CHECK(tpm_force_clear());
-	TPM_CHECK(tpm_physical_enable());
-	TPM_CHECK(tpm_physical_set_deactivated(0));
+	TPM_CHECK(tpm_force_clear(dev));
+	TPM_CHECK(tpm_physical_enable(dev));
+	TPM_CHECK(tpm_physical_set_deactivated(dev, 0));
 
 	/* Try writing again. */
-	TPM_CHECK(tpm_nv_write_value(INDEX0, (uint8_t *)&i, sizeof(i)));
+	TPM_CHECK(tpm_nv_write_value(dev, INDEX0, (u8 *)&i, sizeof(i)));
 	printf("\tdone\n");
 	return 0;
 }
@@ -475,7 +478,13 @@  static int test_write_limit(void)
 	int do_test_##XFUNC(cmd_tbl_t *cmd_tbl, int flag, int argc, \
 	char * const argv[]) \
 	{ \
-		return test_##XFUNC(); \
+		struct udevice *dev; \
+		int ret; \
+\
+		ret = get_tpm(&dev); \
+		if (ret) \
+			return ret; \
+		return test_##XFUNC(dev); \
 	}
 
 #define VOIDENT(XNAME) \
diff --git a/include/tpm-common.h b/include/tpm-common.h
index f8c5569003e..3d88b44db7a 100644
--- a/include/tpm-common.h
+++ b/include/tpm-common.h
@@ -176,9 +176,15 @@  struct tpm_ops {
 int do_##cmd(cmd_tbl_t *cmdtp, int flag,		\
 	     int argc, char * const argv[])		\
 {							\
+	struct udevice *dev;				\
+	int rc;						\
+							\
+	rc = get_tpm(&dev);				\
+	if (rc)						\
+		return rc;				\
 	if (argc != 1)					\
 		return CMD_RET_USAGE;			\
-	return report_return_code(cmd());		\
+	return report_return_code(cmd(dev));		\
 }
 
 /**
@@ -187,6 +193,7 @@  int do_##cmd(cmd_tbl_t *cmdtp, int flag,		\
  * After all commands have been completed the caller is supposed to
  * call tpm_close().
  *
+ * @dev - TPM device
  * Returns 0 on success, -ve on failure.
  */
 int tpm_open(struct udevice *dev);
@@ -196,6 +203,9 @@  int tpm_open(struct udevice *dev);
  *
  * Releasing the locked locality. Returns 0 on success, -ve 1 on
  * failure (in case lock removal did not succeed).
+ *
+ * @dev - TPM device
+ * Returns 0 on success, -ve on failure.
  */
 int tpm_close(struct udevice *dev);
 
@@ -222,6 +232,7 @@  int tpm_get_desc(struct udevice *dev, char *buf, int size);
  * Note that the outgoing data is inspected to determine command type
  * (ordinal) and a timeout is used for that command type.
  *
+ * @dev - TPM device
  * @sendbuf - buffer of the data to send
  * @send_size size of the data to send
  * @recvbuf - memory to save the response to
@@ -236,9 +247,10 @@  int tpm_xfer(struct udevice *dev, const u8 *sendbuf, size_t send_size,
 /**
  * Initialize TPM device.  It must be called before any TPM commands.
  *
+ * @dev - TPM device
  * @return 0 on success, non-0 on error.
  */
-int tpm_init(void);
+int tpm_init(struct udevice *dev);
 
 /**
  * Retrieve the array containing all the v1 (resp. v2) commands.
diff --git a/include/tpm-v1.h b/include/tpm-v1.h
index be2eca946fb..45b7a4831d4 100644
--- a/include/tpm-v1.h
+++ b/include/tpm-v1.h
@@ -282,64 +282,72 @@  struct __packed tpm_nv_data_public {
 /**
  * Issue a TPM_Startup command.
  *
+ * @param dev		TPM device
  * @param mode		TPM startup mode
  * @return return code of the operation
  */
-u32 tpm_startup(enum tpm_startup_type mode);
+u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode);
 
 /**
  * Issue a TPM_SelfTestFull command.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_self_test_full(void);
+u32 tpm_self_test_full(struct udevice *dev);
 
 /**
  * Issue a TPM_ContinueSelfTest command.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_continue_self_test(void);
+u32 tpm_continue_self_test(struct udevice *dev);
 
 /**
  * Issue a TPM_NV_DefineSpace command.  The implementation is limited
  * to specify TPM_NV_ATTRIBUTES and size of the area.  The area index
  * could be one of the special value listed in enum tpm_nv_index.
  *
+ * @param dev		TPM device
  * @param index		index of the area
  * @param perm		TPM_NV_ATTRIBUTES of the area
  * @param size		size of the area
  * @return return code of the operation
  */
-u32 tpm_nv_define_space(u32 index, u32 perm, u32 size);
+u32 tpm_nv_define_space(struct udevice *dev, u32 index, u32 perm, u32 size);
 
 /**
  * Issue a TPM_NV_ReadValue command.  This implementation is limited
  * to read the area from offset 0.  The area index could be one of
  * the special value listed in enum tpm_nv_index.
  *
+ * @param dev		TPM device
  * @param index		index of the area
  * @param data		output buffer of the area contents
  * @param count		size of output buffer
  * @return return code of the operation
  */
-u32 tpm_nv_read_value(u32 index, void *data, u32 count);
+u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count);
 
 /**
  * Issue a TPM_NV_WriteValue command.  This implementation is limited
  * to write the area from offset 0.  The area index could be one of
  * the special value listed in enum tpm_nv_index.
  *
+ * @param dev		TPM device
  * @param index		index of the area
  * @param data		input buffer to be wrote to the area
  * @param length	length of data bytes of input buffer
  * @return return code of the operation
  */
-u32 tpm_nv_write_value(u32 index, const void *data, u32 length);
+u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
+		       u32 length);
 
 /**
  * Issue a TPM_Extend command.
  *
+ * @param dev		TPM device
  * @param index		index of the PCR
  * @param in_digest	160-bit value representing the event to be
  *			recorded
@@ -347,69 +355,78 @@  u32 tpm_nv_write_value(u32 index, const void *data, u32 length);
  *			command
  * @return return code of the operation
  */
-u32 tpm_extend(u32 index, const void *in_digest, void *out_digest);
+u32 tpm_extend(struct udevice *dev, u32 index, const void *in_digest,
+	       void *out_digest);
 
 /**
  * Issue a TPM_PCRRead command.
  *
+ * @param dev		TPM device
  * @param index		index of the PCR
  * @param data		output buffer for contents of the named PCR
  * @param count		size of output buffer
  * @return return code of the operation
  */
-u32 tpm_pcr_read(u32 index, void *data, size_t count);
+u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count);
 
 /**
  * Issue a TSC_PhysicalPresence command.  TPM physical presence flag
  * is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
  *
+ * @param dev		TPM device
  * @param presence	TPM physical presence flag
  * @return return code of the operation
  */
-u32 tpm_tsc_physical_presence(u16 presence);
+u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence);
 
 /**
  * Issue a TPM_ReadPubek command.
  *
+ * @param dev		TPM device
  * @param data		output buffer for the public endorsement key
  * @param count		size of output buffer
  * @return return code of the operation
  */
-u32 tpm_read_pubek(void *data, size_t count);
+u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count);
 
 /**
  * Issue a TPM_ForceClear command.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_force_clear(void);
+u32 tpm_force_clear(struct udevice *dev);
 
 /**
  * Issue a TPM_PhysicalEnable command.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_physical_enable(void);
+u32 tpm_physical_enable(struct udevice *dev);
 
 /**
  * Issue a TPM_PhysicalDisable command.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_physical_disable(void);
+u32 tpm_physical_disable(struct udevice *dev);
 
 /**
  * Issue a TPM_PhysicalSetDeactivated command.
  *
+ * @param dev		TPM device
  * @param state		boolean state of the deactivated flag
  * @return return code of the operation
  */
-u32 tpm_physical_set_deactivated(u8 state);
+u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state);
 
 /**
  * Issue a TPM_GetCapability command.  This implementation is limited
  * to query sub_cap index that is 4-byte wide.
  *
+ * @param dev		TPM device
  * @param cap_area	partition of capabilities
  * @param sub_cap	further definition of capability, which is
  *			limited to be 4-byte wide
@@ -417,15 +434,17 @@  u32 tpm_physical_set_deactivated(u8 state);
  * @param count		size of output buffer
  * @return return code of the operation
  */
-u32 tpm_get_capability(u32 cap_area, u32 sub_cap, void *cap, size_t count);
+u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
+		       void *cap, size_t count);
 
 /**
  * Issue a TPM_FlushSpecific command for a AUTH resource.
  *
+ * @param dev		TPM device
  * @param auth_handle	handle of the auth session
  * @return return code of the operation
  */
-u32 tpm_terminate_auth_session(u32 auth_handle);
+u32 tpm_terminate_auth_session(struct udevice *dev, u32 auth_handle);
 
 /**
  * Issue a TPM_OIAP command to setup an object independent authorization
@@ -434,22 +453,25 @@  u32 tpm_terminate_auth_session(u32 auth_handle);
  * If there was already an OIAP session active it is terminated and a new
  * session is set up.
  *
+ * @param dev		TPM device
  * @param auth_handle	pointer to the (new) auth handle or NULL.
  * @return return code of the operation
  */
-u32 tpm_oiap(u32 *auth_handle);
+u32 tpm_oiap(struct udevice *dev, u32 *auth_handle);
 
 /**
  * Ends an active OIAP session.
  *
+ * @param dev		TPM device
  * @return return code of the operation
  */
-u32 tpm_end_oiap(void);
+u32 tpm_end_oiap(struct udevice *dev);
 
 /**
  * Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
  * the usage of the parent key.
  *
+ * @param dev		TPM device
  * @param parent_handle	handle of the parent key.
  * @param key		pointer to the key structure (TPM_KEY or TPM_KEY12).
  * @param key_length	size of the key structure
@@ -457,13 +479,15 @@  u32 tpm_end_oiap(void);
  * @param key_handle	pointer to the key handle
  * @return return code of the operation
  */
-u32 tpm_load_key2_oiap(u32 parent_handle, const void *key, size_t key_length,
-		       const void *parent_key_usage_auth, u32 *key_handle);
+u32 tpm_load_key2_oiap(struct udevice *dev, u32 parent_handle, const void *key,
+		       size_t key_length, const void *parent_key_usage_auth,
+		       u32 *key_handle);
 
 /**
  * Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
  * authenticating the usage of the key.
  *
+ * @param dev		TPM device
  * @param key_handle	handle of the key
  * @param usage_auth	usage auth for the key
  * @param pubkey	pointer to the pub key buffer; may be NULL if the pubkey
@@ -473,45 +497,51 @@  u32 tpm_load_key2_oiap(u32 parent_handle, const void *key, size_t key_length,
  *			of the stored TPM_PUBKEY structure (iff pubkey != NULL).
  * @return return code of the operation
  */
-u32 tpm_get_pub_key_oiap(u32 key_handle, const void *usage_auth, void *pubkey,
+u32 tpm_get_pub_key_oiap(struct udevice *dev, u32 key_handle,
+			 const void *usage_auth, void *pubkey,
 			 size_t *pubkey_len);
 
 /**
  * Get the TPM permanent flags value
  *
+ * @param dev		TPM device
  * @param pflags	Place to put permanent flags
  * @return return code of the operation
  */
-u32 tpm_get_permanent_flags(struct tpm_permanent_flags *pflags);
+u32 tpm_get_permanent_flags(struct udevice *dev,
+			    struct tpm_permanent_flags *pflags);
 
 /**
  * Get the TPM permissions
  *
+ * @param dev		TPM device
  * @param perm		Returns permissions value
  * @return return code of the operation
  */
-u32 tpm_get_permissions(u32 index, u32 *perm);
+u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm);
 
 /**
  * Flush a resource with a given handle and type from the TPM
  *
+ * @param dev		TPM device
  * @param key_handle           handle of the resource
  * @param resource_type                type of the resource
  * @return return code of the operation
  */
-u32 tpm_flush_specific(u32 key_handle, u32 resource_type);
+u32 tpm_flush_specific(struct udevice *dev, u32 key_handle, u32 resource_type);
 
 #ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
 /**
  * Search for a key by usage AuthData and the hash of the parent's pub key.
  *
+ * @param dev		TPM device
  * @param auth	        Usage auth of the key to search for
  * @param pubkey_digest	SHA1 hash of the pub key structure of the key
  * @param[out] handle	The handle of the key (Non-null iff found)
  * @return 0 if key was found in TPM; != 0 if not.
  */
-u32 tpm_find_key_sha1(const u8 auth[20], const u8 pubkey_digest[20],
-		      u32 *handle);
+u32 tpm_find_key_sha1(struct udevice *dev, const u8 auth[20],
+		      const u8 pubkey_digest[20], u32 *handle);
 #endif /* CONFIG_TPM_LOAD_KEY_BY_SHA1 */
 
 /**
@@ -519,38 +549,43 @@  u32 tpm_find_key_sha1(const u8 auth[20], const u8 pubkey_digest[20],
  * that the TPM may legally return fewer bytes than requested by retrying
  * until @p count bytes have been received.
  *
+ * @param dev		TPM device
  * @param data		output buffer for the random bytes
  * @param count		size of output buffer
  * @return return code of the operation
  */
-u32 tpm_get_random(void *data, u32 count);
+u32 tpm_get_random(struct udevice *dev, void *data, u32 count);
 
 /**
  * tpm_finalise_physical_presence() - Finalise physical presence
  *
+ * @param dev		TPM device
  * @return return code of the operation (0 = success)
  */
-u32 tpm_finalise_physical_presence(void);
+u32 tpm_finalise_physical_presence(struct udevice *dev);
 
 /**
  * tpm_nv_set_locked() - lock the non-volatile space
  *
+ * @param dev		TPM device
  * @return return code of the operation (0 = success)
  */
-u32 tpm_nv_set_locked(void);
+u32 tpm_nv_set_locked(struct udevice *dev);
 
 /**
  * tpm_set_global_lock() - set the global lock
  *
+ * @param dev		TPM device
  * @return return code of the operation (0 = success)
  */
-u32 tpm_set_global_lock(void);
+u32 tpm_set_global_lock(struct udevice *dev);
 
 /**
  * tpm_resume() - start up the TPM from resume (after suspend)
  *
+ * @param dev		TPM device
  * @return return code of the operation (0 = success)
  */
-u32 tpm_resume(void);
+u32 tpm_resume(struct udevice *dev);
 
 #endif /* __TPM_V1_H */
diff --git a/include/tpm-v2.h b/include/tpm-v2.h
index c77b416182e..2f2e66de195 100644
--- a/include/tpm-v2.h
+++ b/include/tpm-v2.h
@@ -131,45 +131,51 @@  enum tpm2_algorithms {
 /**
  * Issue a TPM2_Startup command.
  *
+ * @dev		TPM device
  * @mode	TPM startup mode
  *
  * @return code of the operation
  */
-u32 tpm2_startup(enum tpm2_startup_types mode);
+u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode);
 
 /**
  * Issue a TPM2_SelfTest command.
  *
+ * @dev		TPM device
  * @full_test	Asking to perform all tests or only the untested ones
  *
  * @return code of the operation
  */
-u32 tpm2_self_test(enum tpm2_yes_no full_test);
+u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test);
 
 /**
  * Issue a TPM2_Clear command.
  *
+ * @dev		TPM device
  * @handle	Handle
  * @pw		Password
  * @pw_sz	Length of the password
  *
  * @return code of the operation
  */
-u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz);
+u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
+	       const ssize_t pw_sz);
 
 /**
  * Issue a TPM2_PCR_Extend command.
  *
+ * @dev		TPM device
  * @index	Index of the PCR
  * @digest	Value representing the event to be recorded
  *
  * @return code of the operation
  */
-u32 tpm2_pcr_extend(u32 index, const uint8_t *digest);
+u32 tpm2_pcr_extend(struct udevice *dev, u32 index, const uint8_t *digest);
 
 /**
  * Issue a TPM2_PCR_Read command.
  *
+ * @dev		TPM device
  * @idx		Index of the PCR
  * @idx_min_sz	Minimum size in bytes of the pcrSelect array
  * @data	Output buffer for contents of the named PCR
@@ -177,13 +183,14 @@  u32 tpm2_pcr_extend(u32 index, const uint8_t *digest);
  *
  * @return code of the operation
  */
-u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
-		  unsigned int *updates);
+u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
+		  void *data, unsigned int *updates);
 
 /**
  * Issue a TPM2_GetCapability command.  This implementation is limited
  * to query property index that is 4-byte wide.
  *
+ * @dev		TPM device
  * @capability	Partition of capabilities
  * @property	Further definition of capability, limited to be 4 bytes wide
  * @buf		Output buffer for capability information
@@ -191,22 +198,24 @@  u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
  *
  * @return code of the operation
  */
-u32 tpm2_get_capability(u32 capability, u32 property, void *buf,
-			size_t prop_count);
+u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
+			void *buf, size_t prop_count);
 
 /**
  * Issue a TPM2_DictionaryAttackLockReset command.
  *
+ * @dev		TPM device
  * @pw		Password
  * @pw_sz	Length of the password
  *
  * @return code of the operation
  */
-u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz);
+u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz);
 
 /**
  * Issue a TPM2_DictionaryAttackParameters command.
  *
+ * @dev		TPM device
  * @pw		Password
  * @pw_sz	Length of the password
  * @max_tries	Count of authorizations before lockout
@@ -215,13 +224,15 @@  u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz);
  *
  * @return code of the operation
  */
-u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
-			unsigned int max_tries, unsigned int recovery_time,
+u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
+			const ssize_t pw_sz, unsigned int max_tries,
+			unsigned int recovery_time,
 			unsigned int lockout_recovery);
 
 /**
  * Issue a TPM2_HierarchyChangeAuth command.
  *
+ * @dev		TPM device
  * @handle	Handle
  * @newpw	New password
  * @newpw_sz	Length of the new password
@@ -230,12 +241,14 @@  u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
  *
  * @return code of the operation
  */
-int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
-		     const char *oldpw, const ssize_t oldpw_sz);
+int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
+		     const ssize_t newpw_sz, const char *oldpw,
+		     const ssize_t oldpw_sz);
 
 /**
  * Issue a TPM_PCR_SetAuthPolicy command.
  *
+ * @dev		TPM device
  * @pw		Platform password
  * @pw_sz	Length of the password
  * @index	Index of the PCR
@@ -243,12 +256,13 @@  int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
  *
  * @return code of the operation
  */
-u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
-			   const char *key);
+u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
+			   const ssize_t pw_sz, u32 index, const char *key);
 
 /**
  * Issue a TPM_PCR_SetAuthValue command.
  *
+ * @dev		TPM device
  * @pw		Platform password
  * @pw_sz	Length of the password
  * @index	Index of the PCR
@@ -257,7 +271,8 @@  u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
  *
  * @return code of the operation
  */
-u32 tpm2_pcr_setauthvalue(const char *pw, const ssize_t pw_sz, u32 index,
-			  const char *key, const ssize_t key_sz);
+u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
+			  const ssize_t pw_sz, u32 index, const char *key,
+			  const ssize_t key_sz);
 
 #endif /* __TPM_V2_H */
diff --git a/lib/tpm-common.c b/lib/tpm-common.c
index a440639cec3..6afe59b1fec 100644
--- a/lib/tpm-common.c
+++ b/lib/tpm-common.c
@@ -151,9 +151,9 @@  u32 tpm_return_code(const void *response)
 	return get_unaligned_be32(response + return_code_offset);
 }
 
-u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
+u32 tpm_sendrecv_command(struct udevice *dev, const void *command,
+			 void *response, size_t *size_ptr)
 {
-	struct udevice *dev;
 	int err, ret;
 	u8 response_buffer[COMMAND_BUFFER_SIZE];
 	size_t response_length;
@@ -166,9 +166,6 @@  u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
 		response_length = sizeof(response_buffer);
 	}
 
-	ret = uclass_first_device_err(UCLASS_TPM, &dev);
-	if (ret)
-		return ret;
 	err = tpm_xfer(dev, command, tpm_command_size(command),
 		       response, &response_length);
 
@@ -188,14 +185,7 @@  u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
 	return ret;
 }
 
-int tpm_init(void)
+int tpm_init(struct udevice *dev)
 {
-	struct udevice *dev;
-	int err;
-
-	err = uclass_first_device_err(UCLASS_TPM, &dev);
-	if (err)
-		return err;
-
 	return tpm_open(dev);
 }
diff --git a/lib/tpm-utils.h b/lib/tpm-utils.h
index ac95f262f56..d680d140884 100644
--- a/lib/tpm-utils.h
+++ b/lib/tpm-utils.h
@@ -78,6 +78,7 @@  u32 tpm_return_code(const void *response);
  *			is a bidirectional
  * @return return code of the TPM response
  */
-u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr);
+u32 tpm_sendrecv_command(struct udevice *dev, const void *command,
+			 void *response, size_t *size_ptr);
 
 #endif /* __TPM_UTILS_H */
diff --git a/lib/tpm-v1.c b/lib/tpm-v1.c
index 9d45c3d3bf6..e1b1bf7b5be 100644
--- a/lib/tpm-v1.c
+++ b/lib/tpm-v1.c
@@ -31,7 +31,7 @@  static struct session_data oiap_session = {0, };
 
 #endif /* CONFIG_TPM_AUTH_SESSIONS */
 
-u32 tpm_startup(enum tpm_startup_type mode)
+u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
 {
 	const u8 command[12] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x0, 0x0, 0x0, 0x99, 0x0, 0x0,
@@ -44,49 +44,49 @@  u32 tpm_startup(enum tpm_startup_type mode)
 			     mode_offset, mode))
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(buf, NULL, NULL);
+	return tpm_sendrecv_command(dev, buf, NULL, NULL);
 }
 
-u32 tpm_resume(void)
+u32 tpm_resume(struct udevice *dev)
 {
-	return tpm_startup(TPM_ST_STATE);
+	return tpm_startup(dev, TPM_ST_STATE);
 }
 
-u32 tpm_self_test_full(void)
+u32 tpm_self_test_full(struct udevice *dev)
 {
 	const u8 command[10] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x50,
 	};
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_continue_self_test(void)
+u32 tpm_continue_self_test(struct udevice *dev)
 {
 	const u8 command[10] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x53,
 	};
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_clear_and_reenable(void)
+u32 tpm_clear_and_reenable(struct udevice *dev)
 {
 	u32 ret;
 
 	log_info("TPM: Clear and re-enable\n");
-	ret = tpm_force_clear();
+	ret = tpm_force_clear(dev);
 	if (ret != TPM_SUCCESS) {
 		log_err("Can't initiate a force clear\n");
 		return ret;
 	}
 
 #if IS_ENABLED(CONFIG_TPM_V1)
-	ret = tpm_physical_enable();
+	ret = tpm_physical_enable(dev);
 	if (ret != TPM_SUCCESS) {
 		log_err("TPM: Can't set enabled state\n");
 		return ret;
 	}
 
-	ret = tpm_physical_set_deactivated(0);
+	ret = tpm_physical_set_deactivated(dev, 0);
 	if (ret != TPM_SUCCESS) {
 		log_err("TPM: Can't set deactivated state\n");
 		return ret;
@@ -96,7 +96,7 @@  u32 tpm_clear_and_reenable(void)
 	return TPM_SUCCESS;
 }
 
-u32 tpm_nv_define_space(u32 index, u32 perm, u32 size)
+u32 tpm_nv_define_space(struct udevice *dev, u32 index, u32 perm, u32 size)
 {
 	const u8 command[101] = {
 		0x0, 0xc1,		/* TPM_TAG */
@@ -136,15 +136,15 @@  u32 tpm_nv_define_space(u32 index, u32 perm, u32 size)
 			     size_offset, size))
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(buf, NULL, NULL);
+	return tpm_sendrecv_command(dev, buf, NULL, NULL);
 }
 
-u32 tpm_nv_set_locked(void)
+u32 tpm_nv_set_locked(struct udevice *dev)
 {
-	return tpm_nv_define_space(TPM_NV_INDEX_LOCK, 0, 0);
+	return tpm_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
 }
 
-u32 tpm_nv_read_value(u32 index, void *data, u32 count)
+u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
 {
 	const u8 command[22] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0xcf,
@@ -163,7 +163,7 @@  u32 tpm_nv_read_value(u32 index, void *data, u32 count)
 			     index_offset, index,
 			     length_offset, count))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "d",
@@ -178,7 +178,8 @@  u32 tpm_nv_read_value(u32 index, void *data, u32 count)
 	return 0;
 }
 
-u32 tpm_nv_write_value(u32 index, const void *data, u32 length)
+u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
+		       u32 length)
 {
 	const u8 command[256] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xcd,
@@ -201,21 +202,22 @@  u32 tpm_nv_write_value(u32 index, const void *data, u32 length)
 			     length_offset, length,
 			     data_offset, data, length))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 
 	return 0;
 }
 
-uint32_t tpm_set_global_lock(void)
+uint32_t tpm_set_global_lock(struct udevice *dev)
 {
 	u32 x;
 
-	return tpm_nv_write_value(TPM_NV_INDEX_0, (uint8_t *)&x, 0);
+	return tpm_nv_write_value(dev, TPM_NV_INDEX_0, (uint8_t *)&x, 0);
 }
 
-u32 tpm_extend(u32 index, const void *in_digest, void *out_digest)
+u32 tpm_extend(struct udevice *dev, u32 index, const void *in_digest,
+	       void *out_digest)
 {
 	const u8 command[34] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0x22, 0x0, 0x0, 0x0, 0x14,
@@ -234,7 +236,7 @@  u32 tpm_extend(u32 index, const void *in_digest, void *out_digest)
 			     in_digest_offset, in_digest,
 			     PCR_DIGEST_LENGTH))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 
@@ -246,7 +248,7 @@  u32 tpm_extend(u32 index, const void *in_digest, void *out_digest)
 	return 0;
 }
 
-u32 tpm_pcr_read(u32 index, void *data, size_t count)
+u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
 {
 	const u8 command[14] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x15,
@@ -264,7 +266,7 @@  u32 tpm_pcr_read(u32 index, void *data, size_t count)
 			     0, command, sizeof(command),
 			     index_offset, index))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "s",
@@ -274,7 +276,7 @@  u32 tpm_pcr_read(u32 index, void *data, size_t count)
 	return 0;
 }
 
-u32 tpm_tsc_physical_presence(u16 presence)
+u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
 {
 	const u8 command[12] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x0,
@@ -287,19 +289,19 @@  u32 tpm_tsc_physical_presence(u16 presence)
 			     presence_offset, presence))
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(buf, NULL, NULL);
+	return tpm_sendrecv_command(dev, buf, NULL, NULL);
 }
 
-u32 tpm_finalise_physical_presence(void)
+u32 tpm_finalise_physical_presence(struct udevice *dev)
 {
 	const u8 command[12] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x2, 0xa0,
 	};
 
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_read_pubek(void *data, size_t count)
+u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
 {
 	const u8 command[30] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0x1e, 0x0, 0x0, 0x0, 0x7c,
@@ -312,7 +314,7 @@  u32 tpm_read_pubek(void *data, size_t count)
 	u32 data_size;
 	u32 err;
 
-	err = tpm_sendrecv_command(command, response, &response_length);
+	err = tpm_sendrecv_command(dev, command, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "d",
@@ -330,34 +332,34 @@  u32 tpm_read_pubek(void *data, size_t count)
 	return 0;
 }
 
-u32 tpm_force_clear(void)
+u32 tpm_force_clear(struct udevice *dev)
 {
 	const u8 command[10] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x5d,
 	};
 
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_physical_enable(void)
+u32 tpm_physical_enable(struct udevice *dev)
 {
 	const u8 command[10] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x6f,
 	};
 
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_physical_disable(void)
+u32 tpm_physical_disable(struct udevice *dev)
 {
 	const u8 command[10] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x70,
 	};
 
-	return tpm_sendrecv_command(command, NULL, NULL);
+	return tpm_sendrecv_command(dev, command, NULL, NULL);
 }
 
-u32 tpm_physical_set_deactivated(u8 state)
+u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
 {
 	const u8 command[11] = {
 		0x0, 0xc1, 0x0, 0x0, 0x0, 0xb, 0x0, 0x0, 0x0, 0x72,
@@ -370,10 +372,11 @@  u32 tpm_physical_set_deactivated(u8 state)
 			     state_offset, state))
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(buf, NULL, NULL);
+	return tpm_sendrecv_command(dev, buf, NULL, NULL);
 }
 
-u32 tpm_get_capability(u32 cap_area, u32 sub_cap, void *cap, size_t count)
+u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
+		       void *cap, size_t count)
 {
 	const u8 command[22] = {
 		0x0, 0xc1,		/* TPM_TAG */
@@ -397,7 +400,7 @@  u32 tpm_get_capability(u32 cap_area, u32 sub_cap, void *cap, size_t count)
 			     cap_area_offset, cap_area,
 			     sub_cap_offset, sub_cap))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "d",
@@ -412,7 +415,8 @@  u32 tpm_get_capability(u32 cap_area, u32 sub_cap, void *cap, size_t count)
 	return 0;
 }
 
-u32 tpm_get_permanent_flags(struct tpm_permanent_flags *pflags)
+u32 tpm_get_permanent_flags(struct udevice *dev,
+			    struct tpm_permanent_flags *pflags)
 {
 	const u8 command[22] = {
 		0x0, 0xc1,		/* TPM_TAG */
@@ -429,7 +433,7 @@  u32 tpm_get_permanent_flags(struct tpm_permanent_flags *pflags)
 	u32 err;
 	u32 data_size;
 
-	err = tpm_sendrecv_command(command, response, &response_length);
+	err = tpm_sendrecv_command(dev, command, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "d",
@@ -450,7 +454,7 @@  u32 tpm_get_permanent_flags(struct tpm_permanent_flags *pflags)
 	return 0;
 }
 
-u32 tpm_get_permissions(u32 index, u32 *perm)
+u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
 {
 	const u8 command[22] = {
 		0x0, 0xc1,		/* TPM_TAG */
@@ -468,7 +472,7 @@  u32 tpm_get_permissions(u32 index, u32 *perm)
 	if (pack_byte_string(buf, sizeof(buf), "d", 0, command, sizeof(command),
 			     index_offset, index))
 		return TPM_LIB_ERROR;
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 	if (unpack_byte_string(response, response_length, "d",
@@ -479,7 +483,7 @@  u32 tpm_get_permissions(u32 index, u32 *perm)
 }
 
 #ifdef CONFIG_TPM_FLUSH_RESOURCES
-u32 tpm_flush_specific(u32 key_handle, u32 resource_type)
+u32 tpm_flush_specific(struct udevice *dev, u32 key_handle, u32 resource_type)
 {
 	const u8 command[18] = {
 		0x00, 0xc1,             /* TPM_TAG */
@@ -500,7 +504,7 @@  u32 tpm_flush_specific(u32 key_handle, u32 resource_type)
 			     resource_type_offset, resource_type))
 		return TPM_LIB_ERROR;
 
-	err = tpm_sendrecv_command(buf, response, &response_length);
+	err = tpm_sendrecv_command(dev, buf, response, &response_length);
 	if (err)
 		return err;
 	return 0;
@@ -638,7 +642,7 @@  static u32 verify_response_auth(u32 command_code, const void *response,
 	return TPM_SUCCESS;
 }
 
-u32 tpm_terminate_auth_session(u32 auth_handle)
+u32 tpm_terminate_auth_session(struct udevice *dev, u32 auth_handle)
 {
 	const u8 command[18] = {
 		0x00, 0xc1,		/* TPM_TAG */
@@ -657,19 +661,19 @@  u32 tpm_terminate_auth_session(u32 auth_handle)
 	if (oiap_session.valid && oiap_session.handle == auth_handle)
 		oiap_session.valid = 0;
 
-	return tpm_sendrecv_command(request, NULL, NULL);
+	return tpm_sendrecv_command(dev, request, NULL, NULL);
 }
 
-u32 tpm_end_oiap(void)
+u32 tpm_end_oiap(struct udevice *dev)
 {
 	u32 err = TPM_SUCCESS;
 
 	if (oiap_session.valid)
-		err = tpm_terminate_auth_session(oiap_session.handle);
+		err = tpm_terminate_auth_session(dev, oiap_session.handle);
 	return err;
 }
 
-u32 tpm_oiap(u32 *auth_handle)
+u32 tpm_oiap(struct udevice *dev, u32 *auth_handle)
 {
 	const u8 command[10] = {
 		0x00, 0xc1,		/* TPM_TAG */
@@ -683,7 +687,7 @@  u32 tpm_oiap(u32 *auth_handle)
 	u32 err;
 
 	if (oiap_session.valid)
-		tpm_terminate_auth_session(oiap_session.handle);
+		tpm_terminate_auth_session(dev, oiap_session.handle);
 
 	err = tpm_sendrecv_command(command, response, &response_length);
 	if (err)
@@ -699,8 +703,9 @@  u32 tpm_oiap(u32 *auth_handle)
 	return 0;
 }
 
-u32 tpm_load_key2_oiap(u32 parent_handle, const void *key, size_t key_length,
-		       const void *parent_key_usage_auth, u32 *key_handle)
+u32 tpm_load_key2_oiap(struct udevice *dev, u32 parent_handle, const void *key,
+		       size_t key_length, const void *parent_key_usage_auth,
+		       u32 *key_handle)
 {
 	const u8 command[14] = {
 		0x00, 0xc2,		/* TPM_TAG */
@@ -739,7 +744,7 @@  u32 tpm_load_key2_oiap(u32 parent_handle, const void *key, size_t key_length,
 				  parent_key_usage_auth);
 	if (err)
 		return err;
-	err = tpm_sendrecv_command(request, response, &response_length);
+	err = tpm_sendrecv_command(dev, request, response, &response_length);
 	if (err) {
 		if (err == TPM_AUTHFAIL)
 			oiap_session.valid = 0;
@@ -764,7 +769,8 @@  u32 tpm_load_key2_oiap(u32 parent_handle, const void *key, size_t key_length,
 	return 0;
 }
 
-u32 tpm_get_pub_key_oiap(u32 key_handle, const void *usage_auth, void *pubkey,
+u32 tpm_get_pub_key_oiap(struct udevice *dev, u32 key_handle,
+			 const void *usage_auth, void *pubkey,
 			 size_t *pubkey_len)
 {
 	const u8 command[14] = {
@@ -799,7 +805,7 @@  u32 tpm_get_pub_key_oiap(u32 key_handle, const void *usage_auth, void *pubkey,
 				  request + sizeof(command), usage_auth);
 	if (err)
 		return err;
-	err = tpm_sendrecv_command(request, response, &response_length);
+	err = tpm_sendrecv_command(dev, request, response, &response_length);
 	if (err) {
 		if (err == TPM_AUTHFAIL)
 			oiap_session.valid = 0;
@@ -829,8 +835,8 @@  u32 tpm_get_pub_key_oiap(u32 key_handle, const void *usage_auth, void *pubkey,
 }
 
 #ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
-u32 tpm_find_key_sha1(const u8 auth[20], const u8 pubkey_digest[20],
-		      u32 *handle)
+u32 tpm_find_key_sha1(struct udevice *dev, const u8 auth[20],
+		      const u8 pubkey_digest[20], u32 *handle)
 {
 	u16 key_count;
 	u32 key_handles[10];
@@ -842,7 +848,8 @@  u32 tpm_find_key_sha1(const u8 auth[20], const u8 pubkey_digest[20],
 	unsigned int i;
 
 	/* fetch list of already loaded keys in the TPM */
-	err = tpm_get_capability(TPM_CAP_HANDLE, TPM_RT_KEY, buf, sizeof(buf));
+	err = tpm_get_capability(dev, TPM_CAP_HANDLE, TPM_RT_KEY, buf,
+				 sizeof(buf));
 	if (err)
 		return -1;
 	key_count = get_unaligned_be16(buf);
@@ -870,7 +877,7 @@  u32 tpm_find_key_sha1(const u8 auth[20], const u8 pubkey_digest[20],
 
 #endif /* CONFIG_TPM_AUTH_SESSIONS */
 
-u32 tpm_get_random(void *data, u32 count)
+u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
 {
 	const u8 command[14] = {
 		0x0, 0xc1,		/* TPM_TAG */
@@ -894,7 +901,8 @@  u32 tpm_get_random(void *data, u32 count)
 				     0, command, sizeof(command),
 				     length_offset, this_bytes))
 			return TPM_LIB_ERROR;
-		err = tpm_sendrecv_command(buf, response, &response_length);
+		err = tpm_sendrecv_command(dev, buf, response,
+					   &response_length);
 		if (err)
 			return err;
 		if (unpack_byte_string(response, response_length, "d",
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
index f1bbca8e7aa..f89592d6e2f 100644
--- a/lib/tpm-v2.c
+++ b/lib/tpm-v2.c
@@ -10,7 +10,7 @@ 
 #include <tpm-v2.h>
 #include "tpm-utils.h"
 
-u32 tpm2_startup(enum tpm2_startup_types mode)
+u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode)
 {
 	const u8 command_v2[12] = {
 		tpm_u16(TPM2_ST_NO_SESSIONS),
@@ -24,14 +24,14 @@  u32 tpm2_startup(enum tpm2_startup_types mode)
 	 * Note TPM2_Startup command will return RC_SUCCESS the first time,
 	 * but will return RC_INITIALIZE otherwise.
 	 */
-	ret = tpm_sendrecv_command(command_v2, NULL, NULL);
+	ret = tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 	if (ret && ret != TPM2_RC_INITIALIZE)
 		return ret;
 
 	return 0;
 }
 
-u32 tpm2_self_test(enum tpm2_yes_no full_test)
+u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test)
 {
 	const u8 command_v2[12] = {
 		tpm_u16(TPM2_ST_NO_SESSIONS),
@@ -40,10 +40,11 @@  u32 tpm2_self_test(enum tpm2_yes_no full_test)
 		full_test,
 	};
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz)
+u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
+	       const ssize_t pw_sz)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_SESSIONS),	/* TAG */
@@ -75,10 +76,10 @@  u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz)
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_pcr_extend(u32 index, const uint8_t *digest)
+u32 tpm2_pcr_extend(struct udevice *dev, u32 index, const uint8_t *digest)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_SESSIONS),	/* TAG */
@@ -113,11 +114,11 @@  u32 tpm2_pcr_extend(u32 index, const uint8_t *digest)
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2,	NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
-		  unsigned int *updates)
+u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
+		  void *data, unsigned int *updates)
 {
 	u8 idx_array_sz = max(idx_min_sz, DIV_ROUND_UP(idx, 8));
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
@@ -142,7 +143,7 @@  u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
 			     17 + pcr_sel_idx, pcr_sel_bit))
 		return TPM_LIB_ERROR;
 
-	ret = tpm_sendrecv_command(command_v2, response, &response_len);
+	ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
 	if (ret)
 		return ret;
 
@@ -158,8 +159,8 @@  u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
 	return 0;
 }
 
-u32 tpm2_get_capability(u32 capability, u32 property, void *buf,
-			size_t prop_count)
+u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
+			void *buf, size_t prop_count)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_NO_SESSIONS),		/* TAG */
@@ -175,7 +176,7 @@  u32 tpm2_get_capability(u32 capability, u32 property, void *buf,
 	unsigned int properties_off;
 	int ret;
 
-	ret = tpm_sendrecv_command(command_v2, response, &response_len);
+	ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
 	if (ret)
 		return ret;
 
@@ -191,7 +192,7 @@  u32 tpm2_get_capability(u32 capability, u32 property, void *buf,
 	return 0;
 }
 
-u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz)
+u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_SESSIONS),	/* TAG */
@@ -223,11 +224,12 @@  u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz)
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
-			unsigned int max_tries, unsigned int recovery_time,
+u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
+			const ssize_t pw_sz, unsigned int max_tries,
+			unsigned int recovery_time,
 			unsigned int lockout_recovery)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
@@ -271,11 +273,12 @@  u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
-		     const char *oldpw, const ssize_t oldpw_sz)
+int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
+		     const ssize_t newpw_sz, const char *oldpw,
+		     const ssize_t oldpw_sz)
 {
 	unsigned int offset = 27;
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
@@ -315,11 +318,11 @@  int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
-			   const char *key)
+u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
+			   const ssize_t pw_sz, u32 index, const char *key)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_SESSIONS),	/* TAG */
@@ -370,11 +373,12 @@  u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }
 
-u32 tpm2_pcr_setauthvalue(const char *pw, const ssize_t pw_sz, u32 index,
-			  const char *key, const ssize_t key_sz)
+u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
+			  const ssize_t pw_sz, u32 index, const char *key,
+			  const ssize_t key_sz)
 {
 	u8 command_v2[COMMAND_BUFFER_SIZE] = {
 		tpm_u16(TPM2_ST_SESSIONS),	/* TAG */
@@ -415,5 +419,5 @@  u32 tpm2_pcr_setauthvalue(const char *pw, const ssize_t pw_sz, u32 index,
 	if (ret)
 		return TPM_LIB_ERROR;
 
-	return tpm_sendrecv_command(command_v2, NULL, NULL);
+	return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
 }