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https://github.com/AsahiLinux/u-boot
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82a8a93327
There are two versions of imx6ul pico SOMs: one with 256MB and another one with 512MB of RAM. Convert to SPL so that both versions can be supported. This patch doesn't rework the clock initialization to avoid changing the behavior in this same patch, so it will be cleaned up in future. Currently only the 256MB is tested/supported. Signed-off-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> |
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| .. | ||
| imximage.cfg | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| pico-imx6ul.c | ||
| README | ||
| spl.c | ||
How to Update U-Boot on Pico-imx6ul board ----------------------------------------- Required software on the host PC: - imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader - dfu-util: http://dfu-util.sourceforge.net/releases/ Build U-Boot for Pico: $ make mrproper $ make pico-imx6ul_defconfig $ make This will generate the U-Boot binary called u-boot.imx. Put pico board in USB download mode (refer to the document http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf page 15) Connect a USB to serial adapter between the host PC and pico Connect a USB cable between the OTG pico port and the host PC Open a terminal program such as minicom Copy u-boot.imx to the imx_usb_loader folder. Load u-boot.imx via USB: $ sudo ./imx_usb u-boot.imx Then U-Boot should start and its messages will appear in the console program. Use the default environment variables: => env default -f -a => saveenv Run the DFU command: => dfu 0 mmc 0 Transfer u-boot.imx that will be flashed into the eMMC: $ sudo dfu-util -D u-boot.imx -a boot Then on the U-Boot prompt the following message should be seen after a successful upgrade: #DOWNLOAD ... OK Ctrl+C to exit ... Remove power from the pico board. Put pico board into normal boot mode Power up the board and the new updated U-Boot should boot from eMMC.