upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/doc/device-tree-bindings/timer/arc_timer.txt

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ARC Timer
Required properties:
- compatible : should be "snps,arc-timer".
- reg : Specifies timer ID, could be either 0 or 1.
- clocks : Specifies clocks that drives the counter.
Examples:
timer@0 {
compatible = "snps,arc-timer";
clocks = <&core_clk>;
reg = <0>;
};
timer@1 {
compatible = "snps,arc-timer";
clocks = <&core_clk>;
reg = <1>;
};
NOTE: if you specify both timers, clocks always should be the same
as each timer is driven by the same core clock.