User:NiteHawk

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Hardware

H3

A64

A20

Current issues / problems encountered:

I'm currently staying with (and recommending) U-Boot release v2015.04 for the BPi. That version works well while enabling all the features I tend to use.
As of v2015.10, U-Boot support is rather complete again - one missing thing is support for the (green) status led.


Mainline kernel "missing clock-frequency property": A suggested patch never made it anywhere?

Cortex-M3

  • STM32 VL Discovery board

Contributions

linux-sunxi

  • Extend "fel spl" command to handle both parts of u-boot-sunxi-with-spl.bin, and have "fel uboot" interact with U-Boot (support autostart of script via bootcmd_fel). Merged into sunxi-tools (and U-Boot v2015.10).
  • see also: github sunxi-tools

U-Boot patches

http://patchwork.ozlabs.org/project/uboot/list/?submitter=66075&state=*

Scratchpad

Move along, nothing to see here...

Addendum for Retrieving_device_information#Retrieving_data_over_USB_in_FEL_mode

Sticky-note-pin.png Note: If you get back something like usb_bulk_send() ERROR -7: Operation timed out, chances are that the DRAM has not been initialized. This is usually an indication that the SPL (or boot0) wasn't loaded/executed properly. You might have to select an alternative method (UART) of entering FEL, or use sunxi-fel spl ... before giving the "read" commands.

See http://irclog.whitequark.org/linux-sunxi/2016-04-29#16309060 ff.
Also: This method seems outdated / unreliable anyway - it isn't guaranteed that the sought information is present at those specific DRAM locations?

External documentation (links / 'bookmarks')

NEON

ARM architecture, Advanced SIMD (NEON)

TrustZone

sunxi NAS

sunxi-tools / FEL boot

(snippets from U-Boot and linux-sunxi mailing lists)

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