lkml.org 
[lkml]   [2015]   [Nov]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [PATCH 00/25] serial: sh-sci: Add external clock and BRG Support
    From
    Hi Laurent,

    On Fri, Nov 20, 2015 at 9:58 AM, Laurent Pinchart
    <laurent.pinchart@ideasonboard.com> wrote:
    > On Friday 20 November 2015 09:22:16 Geert Uytterhoeven wrote:
    >> On Thu, Nov 19, 2015 at 10:08 PM, Laurent Pinchart wrote:
    >> > Could you briefly explain (and even better in a source code comment) how
    >> > you handle baud rate calculation with the chained BRGs ?
    >>
    >> I'll do that. Note that there's no chaining of BRGs, only muxing (so yes, it
    >> needs more clarification ;-).
    >
    > Really ? I thought the BRG-EC was one possible input for the internal BRG ?
    > Does it bypass the internal BRG ? Or do you configure the internal BRG to not
    > divide the clock when using the BRG-EC ?

    Yes, it's bypassed.

    Cfr. SCSCR.CKE[1:0].
    '00' means internal BRG (although the docs state P divided by 1/4/16/64),
    '10' means SCK or SC_CLK (SCIF_CLK/INT_CLK).

    Gr{oetje,eeting}s,

    Geert

    --
    Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

    In personal conversations with technical people, I call myself a hacker. But
    when I'm talking to journalists I just say "programmer" or something like that.
    -- Linus Torvalds


    \
     
     \ /
      Last update: 2015-11-20 10:21    [W:3.833 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site