From 532cb7f5ada0cc3779c33606d760ec99f6aa847a Mon Sep 17 00:00:00 2001 From: Jagan Teki Date: Wed, 27 Sep 2017 23:03:12 +0530 Subject: rk3288: vyasa: Add TPL support Since the size of SPL can't be exceeded 0x8000 bytes in RK3288, it is not possible add new SPL features like Falcon mode or etc. So add TPL stage so-that adding new features to SPL is possible. - TPL: DRAM init, clocks - SPL: MMC, falcon, etc Signed-off-by: Jagan Teki Reviewed-by: Philipp Tomsich Acked-by: Philipp Tomsich --- doc/README.rockchip | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'doc/README.rockchip') diff --git a/doc/README.rockchip b/doc/README.rockchip index 12fec38139..4b7be0b715 100644 --- a/doc/README.rockchip +++ b/doc/README.rockchip @@ -150,6 +150,24 @@ Note: rk3036 SDMMC and debug uart use the same iomux, so if you boot from SD, th debug uart must be disabled +Booting from an SD card on RK3288 with TPL +========================================== + +Since the size of SPL can't be exceeded 0x8000 bytes in RK3288, it is not possible add +new SPL features like Falcon mode or etc. + +So introduce TPL so-that adding new features to SPL is possible because now TPL should +run minimal with code like DDR, clock etc and rest of new features in SPL. + +As of now TPL is added on Vyasa-RK3288 board. + +To write an image that boots from an SD card (assumed to be /dev/mmcblk0): + + ./tools/mkimage -n rk3288 -T rksd -d ./tpl/u-boot-tpl.bin out && + cat ./spl/u-boot-spl-dtb.bin >> out && + sudo dd if=out of=/dev/mmcblk0 seek=64 && + sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 seek=256 + Booting from an SD card on RK3188 ================================= -- cgit