Re: 8250 memory mapped UART

[Matthias Lange]

Hi,

On 03/01/2017 08:00 AM, Andrei Borzenkov wrote:
> please test patches from Matthias Lange
> 
> https://lists.gnu.org/archive/html/grub-devel/2017-02/msg00104.html
> 
> 
> On Wed, Mar 1, 2017 at 9:15 AM, Gailu Singh <address@hidden> wrote:
>> Hi Experts,
>>
>> I am using GRUB2 on intel apollo lake board. This board does not have IO
>> mapped uart instead it has 8250 memory mapped UART.

Could you share some details about the board?

>> GRUB2 does not recognize memory mapped uart and gives error ("serial port
>> COM0 not found). There is a 8250 memory mapped driver available in coreboot.
>> Is it possible to port that driver to Grub2?

My patch set adds support for 8250 MMIO PCI cards. Is the UART on your
board connected via PCI?

Best,
Matthias.