[[PATCH v2] tpm: Add wolfTPM library support for TPM 2.0 01/12] tpm: export tpm_show_device, tpm_set_device, and get_tpm

[David Garske <david@wolfssl.com>]

From: Aidan <aidan@wolfssl.com>

Remove static scope from tpm_show_device(), tpm_set_device(), and
get_tpm() in cmd/tpm-common.c so they can be called from other
translation units. Add corresponding declarations to
include/tpm-common.h.

wolfTPM's command backend needs these functions for device enumeration
and selection when operating through U-Boot's driver model.

Signed-off-by: Aidan Garske <aidan@wolfssl.com>
---
 cmd/tpm-common.c     |  4 ++--
 include/tpm-common.h | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/cmd/tpm-common.c b/cmd/tpm-common.c
index 1cd57f901b6..30e99e10758 100644
--- a/cmd/tpm-common.c
+++ b/cmd/tpm-common.c
@@ -234,7 +234,7 @@ int type_string_write_vars(const char *type_str, u8 *data,
 	return 0;
 }
 
-static int tpm_show_device(void)
+int tpm_show_device(void)
 {
 	struct udevice *dev;
 	char buf[80];
@@ -253,7 +253,7 @@ static int tpm_show_device(void)
 	return 0;
 }
 
-static int tpm_set_device(unsigned long num)
+int tpm_set_device(unsigned long num)
 {
 	struct udevice *dev;
 	unsigned long n = 0;
diff --git a/include/tpm-common.h b/include/tpm-common.h
index bfb84a931d1..1ea4463fbbe 100644
--- a/include/tpm-common.h
+++ b/include/tpm-common.h
@@ -337,4 +337,26 @@ enum tpm_version tpm_get_version(struct udevice *dev);
 /* Iterate on all TPM devices */
 #define for_each_tpm_device(dev) uclass_foreach_dev_probe(UCLASS_TPM, (dev))
 
+/**
+ * tpm_show_device() - Show all TPM devices
+ *
+ * Return: 0 on success, -ve on failure
+ */
+int tpm_show_device(void);
+
+/**
+ * tpm_set_device() - Set the TPM device to use
+ *
+ * @num: The number of the TPM device to use
+ * Return: 0 on success, -ve on failure
+ */
+int tpm_set_device(unsigned long num);
+
+/**
+ * get_tpm() - Get the TPM device
+ *
+ * Return: 0 on success, -ve on failure
+ */
+int get_tpm(struct udevice **devp);
+
 #endif /* __TPM_COMMON_H */
-- 
2.43.0