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These questions refer to the initial starting up of the Raspberry PI.

14 votes
1 answer
17k views

How to boot raspberry pi very quickly into Linux?

I would like my pi zero to boot quickly (under 1 second) using Linux. In that case we can pretend it is embedded controller and not standard full blown (but slow) computer. … some resources about altering the chain of bootloaders, but currently I'm unable to tweak it at this level best results I could reach were provided by buildroot Using following rules, I'm able to boot
1 vote
1 answer
543 views

Why is ttyAMA0 initialization too long?

If I understand the dmesg output correctly, there is something happening for almost one second around the UART console initialization: [ 1.090771] 20201000.serial: ttyAMA0 at MMIO 0x20201000 (irq …
1 vote
Accepted

Why is ttyAMA0 initialization too long?

The delay is the time the just initialized UART transfers all the messages collected since the system start. The faster it is, the shorter the delay is (I was using the original 115200). Depending on …
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