On Sun, Nov 2, 2014 at 9:20 PM, Sören Brinkmann
<soren.brinkm...@xilinx.com> wrote:
(...)
> common {
> groups = "uart1_10_grp";
> function = "uart1";
> bias-pull-up = <0>;
> slew-rate = <0>;
> io-standard = <1>;
> };
>
> rx {
> pins = "MIO49";
> bias-high-impedance = <1>;
> };
>
> tx {
> pins = "MIO48";
> bias-high-impedance = <0>;
> };
(...)
> common {
> groups = "uart1_10_grp";
> function = "uart1";
> };
>
> rx {
> pins = "MIO49";
> slew-rate = <0>;
> io-standard = <1>;
> bias-high-impedance;
> };
>
> tx {
> pins = "MIO48";
> slew-rate = <0>;
> io-standard = <1>;
> };
> };
>
> In a nutshell, yes, it's possible to work without the arguments for
> pull-up or tri-state. But it adds complexity in the driver and the DT
> description.
But isn't it obvious that the latter is easier for a human to read
and understand (and not misunderstand) and remember readability
of config is one of the design goals of DT...
Yours,
Linus Walleij
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