CONFIG_SF_DEFAULT_SPEED is used in SPL SPI to configure and probe the flash device during DM SPI uclass probing process, if the spi-max-frequency is not available in the DTB. Currently the max frequency is not available, because of the probing mechanism in SPI uclass has not been fully updated to DM.
The CONFIG_SF_DEFAULT_SPEED is set to 1Mhz if a board defconfig does not specify it. This speed is too slow and result in a few seconds delay while the u-boot image is loaded from flash. Based on a survey of the device tree specifications for MVEBU boards, a sane default value should be 10Mhz. The default of 10Mhz enables an almost instantaneously loading of the u-boot image.
Note that this patch depends on this patch series (has been merged to u-boot-marvell/next): https://lists.denx.de/pipermail/u-boot/2023-March/511038.html
Signed-off-by: Tony Dinh mibodhi@gmail.com ---
arch/arm/mach-mvebu/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig index cdb1776a66..26a2a08d8a 100644 --- a/arch/arm/mach-mvebu/Kconfig +++ b/arch/arm/mach-mvebu/Kconfig @@ -424,6 +424,16 @@ config SECURED_MODE_CSK_INDEX default 0 depends on SECURED_MODE_IMAGE
+config SF_DEFAULT_SPEED + int "Default speed for SPI flash in Hz" + default 10000000 + depends on MVEBU_SPL_BOOT_DEVICE_SPI + +config CONFIG_SF_DEFAULT_MODE + hex "Default mode for SPI flash" + default 0x0 + depends on MVEBU_SPL_BOOT_DEVICE_SPI + source "board/solidrun/clearfog/Kconfig" source "board/kobol/helios4/Kconfig"