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arm: imx6q: pcm058: Rework SPI NOR configuration

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Enable CONFIG_SPL_DM_SPI_FLASH to be able to boot from SPI NOR,
modify the offset of U-boot proper in the SPI NOR, so the
difference in offset matches between SPL and U-boot matches that of
the SD Card, allowing u-boot-with-spl.imx to also be copied to SPI
NOR at an offset of 0x400. Update the README to reflect this
change.

Signed-off-by: Niel Fourie <lusus@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Niel Fourie 2020-07-24 16:33:27 +02:00 • committed by Stefano Babic
parent 1e7a69f661
commit a1c6aed1de
2 changed files with 14 additions and 9 deletions
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20
board/phytec/pcm058/README
View file

@ -61,17 +61,21 @@ Then, clear the SPI flash:
=> sf probe => sf probe
=> sf erase 0x0 0x1000000 => sf erase 0x0 0x1000000
Load the SPL from raw MMC into memory and copy to the SPI. The SPL is maximum Load the equivalent of u-boot-with-spl.imx from the raw MMC into memory and
392*512-byte blocks in size therefore 0x188 blocks, totaling 0x31000 bytes: copy to the SPI. The SPL is expected at an offset of 0x400, and its size is
maximum 392*512-byte blocks in size, therefore 0x188 blocks, totaling 0x31000
bytes. Assume U-boot should fit into 640KiB, therefore 0x500 512-byte blocks,
totalling 0xA0000 bytes. Adding these together:
=> mmc read ${loadaddr} 0x2 0x188 => mmc read ${loadaddr} 0x2 0x688
=> sf write ${loadaddr} 0x400 0x31000 => sf write ${loadaddr} 0x400 0xD1000
Load the U-boot binary into memory and copy to the SPI. U-boot should fit into The SPL is located at offset 0x400, and U-boot at 0x31400 in SPI flash, as to
640KiB, so 0x500 512-byte blocks, totalling 0xA0000 bytes: match the SD Card layout. This would allow, instead of reading from the SD Card
above, with networking and TFTP correctly configured, the equivalent of:
=> mmc read ${loadaddr} 0x18a 0x500 => tftp u-boot-with-spl.imx
=> sf write ${loadaddr} 0x40000 0xA0000 => sf write ${fileaddr} 0x400 ${filesize}
The default NAND bootscripts expect a single MTD partition named "rootfs", The default NAND bootscripts expect a single MTD partition named "rootfs",
which in turn contains the UBI volumes "fit" (which contains the kernel fit- which in turn contains the UBI volumes "fit" (which contains the kernel fit-

3
configs/pcm058_defconfig
View file

@ -7,7 +7,7 @@ CONFIG_SPL_LIBGENERIC_SUPPORT=y
CONFIG_ENV_SIZE=0x4000 CONFIG_ENV_SIZE=0x4000
CONFIG_ENV_OFFSET=0x100000 CONFIG_ENV_OFFSET=0x100000
CONFIG_ENV_SECT_SIZE=0x10000 CONFIG_ENV_SECT_SIZE=0x10000
CONFIG_SYS_SPI_U_BOOT_OFFS=0x40000 CONFIG_SYS_SPI_U_BOOT_OFFS=0x31400
CONFIG_MX6_OCRAM_256KB=y CONFIG_MX6_OCRAM_256KB=y
CONFIG_TARGET_PCM058=y CONFIG_TARGET_PCM058=y
CONFIG_SPL_TEXT_BASE=0x00908000 CONFIG_SPL_TEXT_BASE=0x00908000
@ -34,6 +34,7 @@ CONFIG_SPL_SEPARATE_BSS=y
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x18a CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x18a
CONFIG_SPL_DMA=y CONFIG_SPL_DMA=y
CONFIG_SPL_FS_EXT4=y CONFIG_SPL_FS_EXT4=y
CONFIG_SPL_DM_SPI_FLASH=y
CONFIG_SPL_SPI_LOAD=y CONFIG_SPL_SPI_LOAD=y
CONFIG_SPL_WATCHDOG_SUPPORT=y CONFIG_SPL_WATCHDOG_SUPPORT=y
CONFIG_SPL_YMODEM_SUPPORT=y CONFIG_SPL_YMODEM_SUPPORT=y