[PATCH v2] arm: k3: Kconfig: Enable fTPM and RPMB support

[Shiva Tripathi]

Enable firmware TPM (fTPM) support via OP-TEE for K3 platforms with
MMC hardware. This provides TPM 2.0 functionality through
Microsoft's fTPM Trusted Application running in OP-TEE secure world,
using eMMC RPMB as persistent storage.

fTPM support in U-Boot provides the foundation for measured boot
and disk encryption use cases.

The ARM64 condition ensures these apply only to A53/A72 cores and the
MMC condition ensures fTPM is enabled only on platforms with eMMC
hardware support.

Signed-off-by: Shiva Tripathi <s-tripathi1 at ti.com>
---
Changes in v2:
- Moved fTPM enablement from per-board defconfig files to common Kconfig
- Added configs to ARCH_K3 (arch/arm/Kconfig) to enable for all K3 platforms
- Added command configs to TI_COMMON_CMD_OPTIONS (board/ti/common/Kconfig)
- Added MMC dependency to address concern about boards without eMMC hardware
- Link to v1: https://lore.kernel.org/all/20260223091314.586968-1-s-tripathi1@ti.com/

---
 arch/arm/Kconfig        | 3 +++
 board/ti/common/Kconfig | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5508fce796a..eb83b5c35f1 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -834,6 +834,9 @@ config ARCH_K3
 	imply DM_RNG if ARM64
 	imply TEE if ARM64
 	imply OPTEE if ARM64
+	imply TPM if ARM64 && MMC
+	imply TPM2_FTPM_TEE if ARM64 && MMC
+	imply SUPPORT_EMMC_RPMB if ARM64 && MMC
 
 config ARCH_OMAP2PLUS
 	bool "TI OMAP2+"
diff --git a/board/ti/common/Kconfig b/board/ti/common/Kconfig
index 409454813f3..149909093b3 100644
--- a/board/ti/common/Kconfig
+++ b/board/ti/common/Kconfig
@@ -61,4 +61,6 @@ config TI_COMMON_CMD_OPTIONS
 	imply CMD_SPL
 	imply CMD_TIME
 	imply CMD_USB if USB
+	imply CMD_TPM if TPM
+	imply CMD_OPTEE_RPMB if OPTEE && SUPPORT_EMMC_RPMB
 
-- 
2.34.1