Sorry for typo. I meant 8250 instead of 8050 in last email On Wed, Mar 1, 2017 at 3:21 PM, Gailu Singh <gail...@gmail.com> wrote:
> My board is Intel Oxbohill CRB (Apollo lake). On my board UART are not > connected to PCI. > > I am using grub2 payload loaded by coreboot. UART works fine in coreboot > by using memory mapped 8050 driver (https://github.com/coreboot/ > coreboot/blob/master/src/drivers/uart/uart8250mem.c), however when grub2 > is loaded it refuses to recognize UART. > > > > On Wed, Mar 1, 2017 at 3:08 PM, Matthias Lange < > matthias.la...@kernkonzept.com> wrote: > >> 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 <gail...@gmail.com> 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. >> > >
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