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Subject[PATCH v2 2/3] ARM: OMAP2+: Introduce check for OP-TEE in omap_secure_init()
Date
This check and associated flag can be used to signal the presence
of OP-TEE on the platform. This can be used to determine which
SMC calls to make to perform secure operations.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
arch/arm/mach-omap2/omap-secure.c | 14 ++++++++++++++
arch/arm/mach-omap2/omap-secure.h | 3 +++
2 files changed, 17 insertions(+)

diff --git a/arch/arm/mach-omap2/omap-secure.c b/arch/arm/mach-omap2/omap-secure.c
index e936732cdc4f..39d8070aede6 100644
--- a/arch/arm/mach-omap2/omap-secure.c
+++ b/arch/arm/mach-omap2/omap-secure.c
@@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/memblock.h>
+#include <linux/of.h>

#include <asm/cacheflush.h>
#include <asm/memblock.h>
@@ -20,6 +21,18 @@

static phys_addr_t omap_secure_memblock_base;

+bool optee_available;
+
+static void __init omap_optee_init_check(void)
+{
+ struct device_node *np;
+
+ np = of_find_node_by_path("/firmware/optee");
+ if (np && of_device_is_available(np))
+ optee_available = true;
+ of_node_put(np);
+}
+
/**
* omap_sec_dispatcher: Routine to dispatch low power secure
* service routines
@@ -166,4 +179,5 @@ u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag)

void __init omap_secure_init(void)
{
+ omap_optee_init_check();
}
diff --git a/arch/arm/mach-omap2/omap-secure.h b/arch/arm/mach-omap2/omap-secure.h
index 9aeeb236a224..78a1c4f04bbe 100644
--- a/arch/arm/mach-omap2/omap-secure.h
+++ b/arch/arm/mach-omap2/omap-secure.h
@@ -10,6 +10,8 @@
#ifndef OMAP_ARCH_OMAP_SECURE_H
#define OMAP_ARCH_OMAP_SECURE_H

+#include <linux/types.h>
+
/* Monitor error code */
#define API_HAL_RET_VALUE_NS2S_CONVERSION_ERROR 0xFFFFFFFE
#define API_HAL_RET_VALUE_SERVICE_UNKNWON 0xFFFFFFFF
@@ -72,6 +74,7 @@ extern u32 rx51_secure_dispatcher(u32 idx, u32 process, u32 flag, u32 nargs,
extern u32 rx51_secure_update_aux_cr(u32 set_bits, u32 clear_bits);
extern u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag);

+extern bool optee_available;
void omap_secure_init(void);

#ifdef CONFIG_SOC_HAS_REALTIME_COUNTER
--
2.17.1
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