1.. SPDX-License-Identifier: GPL-2.0+ 2.. sectionauthor:: Bin Meng <bmeng.cn@gmail.com> 3 4Cherry Hill CRB 5=============== 6 7This uses Intel FSP for Braswell platform. Download it from Intel FSP website, 8put the .fd file to the board directory and rename it to fsp.bin. 9 10Extract descriptor.bin and me.bin from the original BIOS on the board using 11ifdtool and put them to the board directory as well. 12 13Note the FSP package for Braswell does not ship a traditional legacy VGA BIOS 14image for the integrated graphics device. Instead a new binary called Video 15BIOS Table (VBT) is shipped. Put it to the board directory and rename it to 16vbt.bin if you want graphics support in U-Boot. 17 18Now you can build U-Boot and obtain u-boot.rom:: 19 20 $ make cherryhill_defconfig 21 $ make all 22 23An important note for programming u-boot.rom to the on-board SPI flash is that 24you need make sure the SPI flash's 'quad enable' bit in its status register 25matches the settings in the descriptor.bin, otherwise the board won't boot. 26 27For the on-board SPI flash MX25U6435F, this can be done by writing 0x40 to the 28status register by DediProg in: Config > Modify Status Register > Write Status 29Register(s) > Register1 Value(Hex). This is is a one-time change. Once set, it 30persists in SPI flash part regardless of the u-boot.rom image burned. 31