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| Started by | Rask Ingemann Lambertsen <rask@formelder.dk> |
|---|---|
| First post | 2017-01-15 17:20 +0100 |
| Last post | 2017-01-17 09:40 +0100 |
| Articles | 2 — 2 participants |
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Dropping device tree pinmux nodes for GPIO usage (Was: [PATCH 3/5] arm64: dts: sun50i: add MMC nodes) Rask Ingemann Lambertsen <rask@formelder.dk> - 2017-01-15 17:20 +0100
Re: Dropping device tree pinmux nodes for GPIO usage (Was: [PATCH 3/5] arm64: dts: sun50i: add MMC nodes) Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-01-17 09:40 +0100
| From | Rask Ingemann Lambertsen <rask@formelder.dk> |
|---|---|
| Date | 2017-01-15 17:20 +0100 |
| Subject | Dropping device tree pinmux nodes for GPIO usage (Was: [PATCH 3/5] arm64: dts: sun50i: add MMC nodes) |
| Message-ID | <sZVHb-4Dp-3@gated-at.bofh.it> |
On Tue, Jan 03, 2017 at 10:52:12AM +0800, Chen-Yu Tsai wrote:
> On Tue, Jan 3, 2017 at 7:03 AM, Andre Przywara <andre.przywara@arm.com> wrote:
> > +
> > + mmc0_default_cd_pin: mmc0_cd_pin@0 {
> > + pins = "PF6";
> > + function = "gpio_in";
> > + bias-pull-up;
> > + };
>
> We are starting to drop pinmux nodes for gpio usage.
How do we get the equivalent of bias-pull-up/down and drive-strength if we
run across a pin that needs it?
--
Rask Ingemann Lambertsen
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| From | Maxime Ripard <maxime.ripard@free-electrons.com> |
|---|---|
| Date | 2017-01-17 09:40 +0100 |
| Subject | Re: Dropping device tree pinmux nodes for GPIO usage (Was: [PATCH 3/5] arm64: dts: sun50i: add MMC nodes) |
| Message-ID | <t0xt7-4GT-9@gated-at.bofh.it> |
| In reply to | #1559302 |
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On Sun, Jan 15, 2017 at 04:59:32PM +0100, Rask Ingemann Lambertsen wrote:
> On Tue, Jan 03, 2017 at 10:52:12AM +0800, Chen-Yu Tsai wrote:
> > On Tue, Jan 3, 2017 at 7:03 AM, Andre Przywara <andre.przywara@arm.com> wrote:
> > > +
> > > + mmc0_default_cd_pin: mmc0_cd_pin@0 {
> > > + pins = "PF6";
> > > + function = "gpio_in";
> > > + bias-pull-up;
> > > + };
> >
> > We are starting to drop pinmux nodes for gpio usage.
>
> How do we get the equivalent of bias-pull-up/down and drive-strength if we
> run across a pin that needs it?
Hmm, that's actually a very good question...
For those cases, leave the pinctrl node for now, we'll deal with that
in due time
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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