From 43df0a159df6ef4c627553915634cd3d961d4da8 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Wed, 18 Mar 2020 09:22:49 +0100
Subject: stm32mp1: dynamically detect op-tee presence

Activate OP-TEE driver for trusted and optee defconfig.

This driver allows detection of TEE presence for boot from flash;
CONFIG_STM32MP1_OPTEE is also removed.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
---
 arch/arm/mach-stm32mp/Kconfig | 10 ----------
 arch/arm/mach-stm32mp/fdt.c   |  4 +++-
 2 files changed, 3 insertions(+), 11 deletions(-)

(limited to 'arch')

diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index ba965e7b3b..314f284dcf 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -86,16 +86,6 @@ config TARGET_DH_STM32MP1_PDK2
 
 endchoice
 
-config STM32MP1_OPTEE
-	bool "Support trusted boot with TF-A and OP-TEE"
-	depends on TFABOOT
-	default n
-	help
-		Say Y here to enable boot with TF-A and OP-TEE
-		Trusted boot chain is :
-		BootRom => TF-A.stm32 (clock & DDR) => OP-TEE => U-Boot.stm32
-		OP-TEE monitor provides ST SMC to access to secure resources
-
 config SYS_TEXT_BASE
 	default 0xC0100000
 
diff --git a/arch/arm/mach-stm32mp/fdt.c b/arch/arm/mach-stm32mp/fdt.c
index ae82270e42..21b5f09728 100644
--- a/arch/arm/mach-stm32mp/fdt.c
+++ b/arch/arm/mach-stm32mp/fdt.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <fdt_support.h>
+#include <tee.h>
 #include <asm/arch/sys_proto.h>
 #include <dt-bindings/pinctrl/stm32-pinfunc.h>
 #include <linux/io.h>
@@ -322,7 +323,8 @@ int ft_system_setup(void *blob, bd_t *bd)
 				       "st,package", pkg, false);
 	}
 
-	if (!CONFIG_IS_ENABLED(STM32MP1_OPTEE))
+	if (!CONFIG_IS_ENABLED(OPTEE) ||
+	    !tee_find_device(NULL, NULL, NULL, NULL))
 		stm32_fdt_disable_optee(blob);
 
 	return ret;
-- 
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