AST2400 x86 bringup LPC problems

[Aaron]

Per usual found the issue after spamming the list. The LCLK was disabled
because lpc_ctrl was not setup correctly and error`ed out which cleans up
and disables the lclk entirely... doh.

Aaron

On 12 July 2018 at 16:47, Aaron <aaron_ppus at fmad.com> wrote:

> Hi,
>
> Currently stuck bringup an x86 server board with the AST2400 and looking
> for advice.
>
> Have based the code on the Quanta machine, theres a bunch of dst changes
> and different gpio / i2c etc mappings. Most things work now, power control,
> can control, gpios are good etc however the LPC is broken.
>
> What I cant working out is why the LPC interface is completely dead.
>
> Symptoms are:
> - LPC post code sniffer caches nothing
> - Host UART is completely missing
> - Host IO port range reading returns 0xff`s
>
> Its as if the LPC block is not being reset or theres no clock or being
> muxed out or something. Been a few days now and still cant work it out.
>
> Originally thought it was because Strap[14] = 1  (LPC reset not connected
> to PCI reset) but on the board they physically routed PERST to the to the
> pin, so it should be ok.
>
> Any suggestions or advice ?
>
> Thanks
> Aaron
>
>
>
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