[PATCH v2] arm: socfpga: soc64: To notify SDM when U-Boot pass control to Linux

[dinesh.maniyam at intel.com]

From: Dinesh Maniyam <dinesh.maniyam at intel.com>

Prior U-Boot pass control to Linux, U-Boot will send a mailbox command
"HPS_STAGE_NOTIFY" to notify Secure Device Manager (SDM) on HPS SW
transition.

Signed-off-by: Dinesh Maniyam <dinesh.maniyam at intel.com>

---

v1->v2
Add space in title
---
 arch/arm/mach-socfpga/misc_soc64.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-socfpga/misc_soc64.c b/arch/arm/mach-socfpga/misc_soc64.c
index 2acdfad07b..3148eb46a5 100644
--- a/arch/arm/mach-socfpga/misc_soc64.c
+++ b/arch/arm/mach-socfpga/misc_soc64.c
@@ -89,3 +89,8 @@ void do_bridge_reset(int enable, unsigned int mask)

 	socfpga_bridges_reset(enable);
 }
+
+void arch_preboot_os(void)
+{
+	mbox_hps_stage_notify(HPS_EXECUTION_STATE_OS);
+}
\ No newline at end of file
--
2.26.2