From: Madan Srinivas <mad...@ti.com>

Add a section describing the secure boot image used on
Keystone2 secure devices.

Signed-off-by: Madan Srinivas <mad...@ti.com>
Signed-off-by: Andrew F. Davis <a...@ti.com>
Reviewed-by: Tom Rini <tr...@konsulko.com>
---
 doc/README.ti-secure | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/doc/README.ti-secure b/doc/README.ti-secure
index 9b0fbf9732..4b5380c0f3 100644
--- a/doc/README.ti-secure
+++ b/doc/README.ti-secure
@@ -133,6 +133,26 @@ Booting of U-Boot SPL
        u-boot-spl_HS_X-LOADER - boot image for all other flash memories
                including QSPI and NOR flash
 
+       Invoking the script for Keystone2 Secure Devices
+       =============================================
+
+       create-boot-image.sh \
+               <UNUSED> <INPUT_FILE> <OUTPUT_FILE> <UNUSED>
+
+       <UNUSED> is currently ignored and reserved for future use.
+
+       <INPUT_FILE> is the full path and filename of the public world boot
+       loader binary file (only u-boot.bin is currently supported on
+       Keystone2 devices, u-boot-spl.bin is not currently supported).
+
+       <OUTPUT_FILE> is the full path and filename of the final secure image.
+       The output binary images should be used in place of the standard
+       non-secure binary images (see the platform-specific user's guides
+       and releases notes for how the non-secure images are typically used)
+       u-boot_HS_MLO - signed and encrypted boot image that can be used to
+               boot from all media. Secure boot from SPI NOR flash is not
+               currently supported.
+
 Booting of Primary U-Boot (u-boot.img)
 ======================================
 
-- 
2.11.0

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