ARM: tegra: add support for Trusted Foundations

Register the firmware operations for Trusted Foundations if the device
tree indicates it is active on the device.

Signed-off-by: Alexandre Courbot <[e-mail]>
Reviewed-by: Tomasz Figa <[e-mail]>
Reviewed-by: Stephen Warren <[e-mail]>
Signed-off-by: Stephen Warren <[e-mail]>

Documentation/devicetree/bindings/arm/tegra.txt

···
   nvidia,whistler
   toradex,colibri_t20-512
   toradex,iris
+
+Trusted Foundations
+-------------------------------------------
+Tegra supports the Trusted Foundation secure monitor. See the
+"tlm,trusted-foundations" binding's documentation for more details.

arch/arm/mach-tegra/Kconfig

···
 	bool "NVIDIA Tegra" if ARCH_MULTI_V7
 	select ARCH_HAS_CPUFREQ
 	select ARCH_REQUIRE_GPIOLIB
+	select ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
 	select ARM_GIC
 	select CLKSRC_MMIO
 	select CLKSRC_OF

arch/arm/mach-tegra/tegra.c

···
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <asm/setup.h>
+#include <asm/trusted_foundations.h>
 
 #include "apbio.h"
 #include "board.h"
···
 
 static void __init tegra_init_early(void)
 {
+	of_register_trusted_foundations();
 	tegra_apb_io_init();
 	tegra_init_fuse();
 	tegra_cpu_reset_handler_init();