ARM: Rockchip: Add documentation

Signed-off-by: Andrey Panov <rockford@yandex.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 47 insertions, 0 deletions

diff --git a/Documentation/boards/rockchip.rst b/Documentation/boards/rockchip.rst
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+Rockchip RK3188
+===============
+
+Radxa Rock
+----------
+
+Radxa Rock is a small SBC based on Rockchip RK3188 SoC.
+See http://radxa.com/Rock for additional information.
+
+Building
+^^^^^^^^
+
+.. code-block:: sh
+
+  make ARCH=arm radxa_rock_defconfig
+  make ARCH=arm
+
+Creating bootable SD card
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This will require a DRAM setup blob and additional utilities, see above.
+
+Card layout (block == 0x200 bytes).
+
+============   ==========================================
+Block Number   Name
+============   ==========================================
+0x0000         DOS partition table
+0x0040         RK bootinfo (BootROM check sector)
+0x0044         DRAM setup routine
+0x005C         Bootloader (barebox)
+0x0400         Barebox environment
+0x0800         Free space start
+============   ==========================================
+
+Instructions.
+
+* Make 2 partitions on SD for boot and root filesystems.
+* Checkout and compile https://github.com/apxii/rkboottools
+* Get some RK3188 bootloader from https://github.com/neo-technologies/rockchip-bootloader
+* Run "rk-splitboot RK3188Loader(L)_V2.13.bin" command. (for example).
+  You will get FlashData file with others. It's a DRAM setup blob.
+* Otherwise it can be borrowed from RK U-boot sources from
+  https://github.com/linux-rockchip/u-boot-rockchip/blob/u-boot-rk3188/tools/rk_tools/3188_LPDDR2_300MHz_DDR3_300MHz_20130830.bin
+* Run "rk-makebootable FlashData barebox-radxa-rock.bin rrboot.bin"
+* Insert SD card and run "dd if=rrboot.bin of=</dev/sdcard> bs=$((0x200)) seek=$((0x40))"
+* SD card is ready