Re: [staging/cadence-aarch64 PATCH v2 5/6] CadencePkg: Add ACPI tables for Cadence CSP platform.

[Scott Telford <stelford@cadence.com>]

> -----Original Message-----
> From: Leif Lindholm [mailto:leif.lindholm@linaro.org]
> Sent: 06 June 2017 12:12
> To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Scott Telford <stelford@cadence.com>; edk2-devel@lists.01.org <edk2-
> devel@ml01.01.org>; Graeme Gregory <graeme.gregory@linaro.org>;
> afish@apple.com; Kinney, Michael D <michael.d.kinney@intel.com>
> Subject: Re: [staging/cadence-aarch64 PATCH v2 5/6] CadencePkg: Add ACPI
> tables for Cadence CSP platform.
 
> However, if you want this Cadence UART to be usable as an operating
> system boot console in ACPI systems, you need to get the serial port
> type added to DBG2 (which is explicitly referenced from SPCR):
> https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__msdn.microsoft.com_en-2Dus_library_windows_hardware_dn639131-
> 28v-3Dvs.85-
> 29.aspx&d=DwIBAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ-
> _haXqY&r=0b2qZ7fqn6FWL0d7Bhx7saDL-
> B7sx3Cxz3HPARO7ozc&m=SLa8mBFqNKP-
> AkMHpGlWJjZ0wbdukQ9J_HJDF_4Wd7o&s=1QAszB3f1u_Zpzh4ZD-
> YJzK9rtZJktnrFm9j23oaQeU&e=
> 
> Is this something you would be interested in doing? I could probably
> dig up the required contacts if that was the case.
> 
> (You would then also need to add some matching code in
> linux/drivers/tty/serial/xilinx_uartps.c, to get it autodetected by
> Linux.)

Thanks for the offer, but we only used a Cadence UART in this platform because we didn't have the ARM PL011 IP available to us when we started working on this (we do now). I doubt anyone else will want to use this UART in an SBSA or similar system, so I'll just drop SPCR.

Regards,
Scott.