[PATCH 2/2] doc: rockchip: Update and complete info about RK3308

[Massimo Pegorer]

Update documentation about build steps for RK3308, using an external
TPL. Add RK3308 case to rST document. Add ROCK Pi S in the list of
supported boards.

Signed-off-by: Massimo Pegorer <massimo.pegorer+oss at gmail.com>
---
 doc/README.rockchip             |  4 ++--
 doc/board/rockchip/rockchip.rst | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/doc/README.rockchip b/doc/README.rockchip
index 52b5140eca..cfbd858c3b 100644
--- a/doc/README.rockchip
+++ b/doc/README.rockchip
@@ -38,16 +38,16 @@ Building
     (or you can use another cross compiler if you prefer)
 
 2. To build RK3308 board:
+
    - Get the rkbin
      => git clone https://github.com/rockchip-linux/rkbin.git
 
    - Compile U-Boot
      => cd /path/to/u-boot
      => export BL31=/path/to/rkbin/bin/rk33/rk3308_bl31_v2.22.elf
+     => export ROCKCHIP_TPL=/path/to/rkbin/bin/rk33/rk3308_ddr_589MHz_uart2_m0_v1.26.bin
      => make roc-cc-rk3308_defconfig
      => make CROSS_COMPILE=aarch64-linux-gnu- all
-     => ./tools/mkimage -n rk3308 -T rksd -d /path/to/rkbin/bin/rk33/rk3308_ddr_589MHz_uart2_m0_v1.26.bin idbloader.img
-     => cat spl/u-boot-spl.bin  >> idbloader.img
 
 3. To build RK3399 board:
 
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index de9fe8e642..b38c3d3136 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -53,6 +53,7 @@ List of mainline supported Rockchip boards:
      - Google Speedy (chromebook_speedy)
      - Amarula Vyasa-RK3288 (vyasa-rk3288)
 * rk3308
+     - Radxa ROCK Pi S (rock-pi-s-rk3308)
      - Rockchip Evb-RK3308 (evb-rk3308)
      - Roc-cc-RK3308 (roc-cc-rk3308)
 * rk3326
@@ -172,6 +173,15 @@ To build rk3288 boards:
         make evb-rk3288_defconfig
         make CROSS_COMPILE=arm-linux-gnueabihf-
 
+To build rk3308 boards:
+
+.. code-block:: bash
+
+        export BL31=../rkbin/bin/rk33/rk3308_bl31_vX.YZ.elf
+        export ROCKCHIP_TPL=../rkbin/bin/rk33/rk3308_ddr_589MHz_uart0_m0_vX.YZ.bin
+        make evb-rk3308_defconfig
+        make CROSS_COMPILE=aarch64-linux-gnu-
+
 To build rk3328 boards:
 
 .. code-block:: bash
-- 
2.34.1