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

@@ -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
 

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;

board/dhelectronics/dh_stm32mp1/board.c

@@ -116,9 +116,7 @@ int checkboard(void)
 	const char *fdt_compat;
 	int fdt_compat_len;
 
-	if (IS_ENABLED(CONFIG_STM32MP1_OPTEE))
-		mode = "trusted with OP-TEE";
-	else if (IS_ENABLED(CONFIG_TFABOOT))
+	if (IS_ENABLED(CONFIG_TFABOOT))
 		mode = "trusted";
 	else
 		mode = "basic";

board/st/common/stm32mp_mtdparts.c

@@ -9,6 +9,7 @@
 #include <env_internal.h>
 #include <mtd.h>
 #include <mtd_node.h>
+#include <tee.h>
 
 #define MTDPARTS_LEN		256
 #define MTDIDS_LEN		128
@@ -49,7 +50,7 @@ static void board_get_mtdparts(const char *dev,
 		strncat(mtdparts, ",", MTDPARTS_LEN);
 	}
 
-	if (CONFIG_IS_ENABLED(STM32MP1_OPTEE) && tee) {
+	if (tee) {
 		strncat(mtdparts, tee, MTDPARTS_LEN);
 		strncat(mtdparts, ",", MTDPARTS_LEN);
 	}
@@ -72,7 +73,8 @@ void board_mtdparts_default(const char **mtdids, const char **mtdparts)
 		return;
 	}
 
-	if (CONFIG_IS_ENABLED(STM32MP1_OPTEE))
+	if (CONFIG_IS_ENABLED(OPTEE) &&
+	    tee_find_device(NULL, NULL, NULL, NULL))
 		tee = true;
 
 	memset(parts, 0, sizeof(parts));

board/st/stm32mp1/stm32mp1.c

@@ -87,9 +87,7 @@ int checkboard(void)
 	const char *fdt_compat;
 	int fdt_compat_len;
 
-	if (IS_ENABLED(CONFIG_STM32MP1_OPTEE))
-		mode = "trusted with OP-TEE";
-	else if (IS_ENABLED(TFABOOT))
+	if (IS_ENABLED(CONFIG_TFABOOT))
 		mode = "trusted";
 	else
 		mode = "basic";

configs/stm32mp15_optee_defconfig

@@ -5,7 +5,6 @@ CONFIG_SYS_MALLOC_F_LEN=0x3000
 CONFIG_ENV_OFFSET=0x280000
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_TARGET_ST_STM32MP15x=y
-CONFIG_STM32MP1_OPTEE=y
 CONFIG_ENV_OFFSET_REDUND=0x2C0000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
@@ -114,6 +113,9 @@ CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_STM32_QSPI=y
 CONFIG_STM32_SPI=y
+CONFIG_TEE=y
+CONFIG_OPTEE=y
+# CONFIG_OPTEE_TA_AVB is not set
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_DM_USB_GADGET=y

configs/stm32mp15_trusted_defconfig

@@ -110,6 +110,9 @@ CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_STM32_QSPI=y
 CONFIG_STM32_SPI=y
+CONFIG_TEE=y
+CONFIG_OPTEE=y
+# CONFIG_OPTEE_TA_AVB is not set
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_DM_USB_GADGET=y