[Buildroot] [PATCH 2/2] package/wolftpm: Add config options for TPM 2.0 extra capabilities

[Dimi Tomov]

From: Dimitar Tomov <dimi at tpm.dev>

Some TPM 2.0 chips offer extra capabilities. This patch adds additional
configuration options to the wolftpm package, so such capabilities can
be available to the user. For example, the STMicroelectronics ST33 and
Nuvoton NPCT750 both offer secure GPIO. Due to chip differences, wolfTPM
requires explicit configuration options to enable the extra capabilities.

Signed-off-by: Dimitar Tomov <dimi at tpm.dev>
---
 package/wolftpm/Config.in  | 14 ++++++++++++++
 package/wolftpm/wolftpm.mk | 12 ++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/package/wolftpm/Config.in b/package/wolftpm/Config.in
index 0b964c3d7e..52a9005d66 100644
--- a/package/wolftpm/Config.in
+++ b/package/wolftpm/Config.in
@@ -23,6 +23,20 @@ config BR2_PACKAGE_WOLFTPM_WOLFCRYPT
 	  encryption. Disabling this option is not recommended as it
 	  could create a security breach in most environments.
 
+config BR2_PACKAGE_WOLFTPM_ST33
+	bool "st33"
+	default n
+	help
+	  Enable support of TPM 2.0 extra functionality offered by the
+	  STMicroelectronics ST33 chip.
+
+config BR2_PACKAGE_WOLFTPM_NUVOTON
+	bool "npct750"
+	default n
+	help
+	  Enable support of TPM 2.0 extra functionality offered by the
+	  Nuvoton NPCT750 chip.
+
 comment "wolfCrypt hooks need a toolchain w/ threads, dynamic library"
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS
 
diff --git a/package/wolftpm/wolftpm.mk b/package/wolftpm/wolftpm.mk
index c5ebeca18e..d3f693a62e 100644
--- a/package/wolftpm/wolftpm.mk
+++ b/package/wolftpm/wolftpm.mk
@@ -35,4 +35,16 @@ else
 WOLFTPM_CONF_OPTS += --disable-wolfcrypt
 endif
 
+ifeq ($(BR2_PACKAGE_WOLFTPM_ST33),y)
+WOLFTPM_CONF_OPTS += --enable-st33
+else
+WOLFTPM_CONF_OPTS += --disable-st33
+endif
+
+ifeq ($(BR2_PACKAGE_WOLFTPM_NPCT750),y)
+WOLFTPM_CONF_OPTS += --enable-nuvoton
+else
+WOLFTPM_CONF_OPTS += --disable-nuvoton
+endif
+
 $(eval $(autotools-package))
-- 
2.27.0