10.0-release proposed patch for Atmel

[Adrian Chadd]

Where's the original UART diff?

Adrian
On Dec 22, 2013 1:45 AM, "Warner Losh" <imp at bsdimp.com> wrote:

> Gentlemen,
>
> Right now, the mountroot prompt doesn't work on Atmel CPUs. Almost all the
> characters are eaten. I recently committed an elegant fix for this into
> head to mask the interrupt for new characters and only do polling.
>
> However, it touched the base uart. In an abundance of caution, the re at has asked me to see if I can come up with a fix w/o that.
>
> A less elegant, less functional fix can be found at
> http://people.freebsd.org/~imp/at91-mountroot-10.diff
>
> This fix defers turning on the RXRDY bit in the interrupt mask until we
> get the first interrupt after the first opening of the device. This is
> sufficient for mountroot> to work, but wouldn't fix things like GELI that
> prompt the user from the kernel. I think that's acceptable for 10.0 given
> the typical use case for atmel.
>
> Can the folks here that know Atmel take a look at the patch and let me
> know what you think?
>
> Warner
>
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