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    SubjectRe: [PATCH 0/4 V2] pch_uart: Cleanups, board quirks, and user uartclk parameter


    On 02/29/2012 06:40 PM, Feng Tang wrote:
    > On Wed, Feb 29, 2012 at 05:12:08PM -0800, Darren Hart wrote:
    >>
    >>
    >> On 02/29/2012 05:06 PM, Tomoya MORINAGA wrote:
    >>> 2012年3月1日9:47 Darren Hart <dvhart@linux.intel.com>:
    >>>> how do we force the
    >>>> 192MHz clock setting BEFORE the pch_phub code runs?
    >>>
    >>> To realize your requirement,
    >>> I think that set by BIOS is only way.
    >>
    >> Perhaps a pch_phub.bios_uartclk parameter could be used for setting up
    >> the initial console and once the phub driver is loaded, it can make the
    >> necessary changes and fix things up in the uart port? This would add a
    >> binding between the pch_uart and pch_phub code.
    >>
    >> Thoughts?
    >
    > To satisfy the early console, one way may be add a x86_init_ops for all
    > Tunnel Creek compatible platform like what Moorestown/Medfield have done,
    > and insert the uart clk setting work into one of the early init function.
    >

    I believe this is inline with what Alan was recommending in his response
    to the V1 patch series, and it sounds like a reasonable next step.

    --
    Darren Hart
    Intel Open Source Technology Center
    Yocto Project - Linux Kernel
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