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SubjectRe: [PATCH 2/3] ACPI: SPCR: Add support for AMD CT/SZ
On 03/13/2018 08:36 PM, Daniel Kurtz wrote:
> AMD Carrizo / Stoneyridge use a DesignWare 8250 UART that uses a special
> earlycon setup handler to configure its input clock in order to compute
> baud rate divisor registers.
> Detect them by examining the OEMID field in the SPCR header, and pass
> then pass uart type amdcz to earlycon.

FYI I spoke with Microsoft some time ago about standardizing the ability
to convey non-standard baud rates in the SPCR. If you're interested in
driving, I can put you in touch with the right person over there.


Computer Architect

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