Messages in this thread | | | Date | Fri, 20 Nov 2015 10:07:31 +0100 | Subject | Re: [PATCH 00/25] serial: sh-sci: Add external clock and BRG Support | From | Geert Uytterhoeven <> |
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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
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