From 29ab5d3fb41f1827f0a75536352e1956532025fd Mon Sep 17 00:00:00 2001
From: Vignesh Raghavendra
Date: Tue, 4 Feb 2020 11:09:57 +0530
Subject: board: ti: Update AM65x and J721e READMEs for OSPI boot

Update AM65x and J721e README files with instructions for flashing OSPI
images.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 board/ti/am65x/README | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

(limited to 'board/ti/am65x')

diff --git a/board/ti/am65x/README b/board/ti/am65x/README
index 2e3fd9c4a81..86868e8c705 100644
--- a/board/ti/am65x/README
+++ b/board/ti/am65x/README
@@ -262,6 +262,61 @@ To boot kernel from eMMC, use the following commands:
 => setenv bootpart 0
 => boot
 
+OSPI:
+-----
+ROM supports booting from OSPI from offset 0x0.
+
+Flashing images to OSPI:
+
+Below commands can be used to download tiboot3.bin, tispl.bin, u-boot.img,
+and sysfw.itb over tftp and then flash those to OSPI at their respective
+addresses.
+
+=> sf probe
+=> tftp ${loadaddr} tiboot3.bin
+=> sf update $loadaddr 0x0 $filesize
+=> tftp ${loadaddr} tispl.bin
+=> sf update $loadaddr 0x80000 $filesize
+=> tftp ${loadaddr} u-boot.img
+=> sf update $loadaddr 0x280000 $filesize
+=> tftp ${loadaddr} sysfw.itb
+=> sf update $loadaddr 0x6C0000 $filesize
+
+Flash layout for OSPI:
+
+         0x0 +----------------------------+
+             |     ospi.tiboot3(512K)     |
+             |                            |
+     0x80000 +----------------------------+
+             |     ospi.tispl(2M)         |
+             |                            |
+    0x280000 +----------------------------+
+             |     ospi.u-boot(4M)        |
+             |                            |
+    0x680000 +----------------------------+
+             |     ospi.env(128K)         |
+             |                            |
+    0x6A0000 +----------------------------+
+	     |	 ospi.env.backup (128K)   |
+	     |                            |
+    0x6C0000 +----------------------------+
+             |      ospi.sysfw(1M)        |
+             |                            |
+    0x7C0000 +----------------------------+
+	     |      padding (256k)        |
+    0x800000 +----------------------------+
+             |     ospi.rootfs(UBIFS)     |
+             |                            |
+             +----------------------------+
+
+Kernel Image and DT are expected to be present in the /boot folder of UBIFS
+ospi.rootfs just like in SD card case. U-Boot looks for UBI volume named
+"rootfs" for rootfs.
+
+To boot kernel from OSPI, at the U-Boot prompt:
+=> setenv boot ubi
+=> boot
+
 UART:
 -----
 ROM supports booting from MCU_UART0 via X-Modem protocol. The entire UART-based
-- 
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