[PATCH v2] ARM: shmobile: koelsch: Add support HSCIF1

[Geert Uytterhoeven]

Hi Laurent,

On Fri, Jun 13, 2014 at 3:24 PM, Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:
>> About your comment about the resistors and capacitors, which applies to
>> both HSCIF0 and HSCIF1: probably the serial port will still work if
>> these are present.
>
> With a 4.7µF capacitive load on the transmission line, assuming a drive
> strength of 40mA (which is pretty high), switching between 0V and 3.3V takes
> 388µs, corresponding to 2579 Hz. You'll have to reduce the baud rate :-)

Right, 4.7µF is a bit high. So at least the capacitor has to go for today's
typical serial speeds.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at 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