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be0d217952
The Allwinner A64 SoCs suffers from an arch timer implementation erratum,
where sometimes the lower 11 bits of the counter value erroneously
become all 0's or all 1's [1]. This leads to sudden jumps, both forwards and
backwards, with the latter one often showing weird behaviour.
Port the workaround proposed for Linux to U-Boot and activate it for all
A64 boards.
This fixes crashes when accessing MMC devices (SD cards), caused by a
recent change to actually use the counter value for timeout checks.
Fixes:
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|---|---|---|
| .. | ||
| arc | ||
| arm | ||
| m68k | ||
| microblaze | ||
| mips | ||
| nds32 | ||
| nios2 | ||
| powerpc | ||
| riscv | ||
| sandbox | ||
| sh | ||
| x86 | ||
| xtensa | ||
| .gitignore | ||
| Kconfig | ||