linux-kernel - Re: [PATCH v4 6/7] ARM: zynq: DT: Add pinctrl information

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Date:	Mon, 26 Jan 2015 18:05:23 -0800
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Andreas Färber <afaerber@...e.de>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	<devicetree@...r.kernel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Heiko Stuebner <heiko@...ech.de>, <linux-sh@...r.kernel.org>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Michal Simek <michal.simek@...inx.com>,
	<linux-kernel@...r.kernel.org>,
	Beniamino Galvani <b.galvani@...il.com>,
	<linux-rockchip@...ts.infradead.org>,
	"Ivan T. Ivanov" <iivanov@...sol.com>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Alessandro Rubini <rubini@...pv.it>
Subject: Re: [PATCH v4 6/7] ARM: zynq: DT: Add pinctrl information

On Tue, 2015-01-27 at 12:57AM +0100, Andreas Färber wrote:
> Am 09.01.2015 um 16:43 schrieb Soren Brinkmann:
> > Add pinctrl descriptions to the zc702 and zc706 device trees.
> > 
> > Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> > Tested-by: Andreas Färber <afaerber@...e.de>
> > ---
> > Changes since v1:
> >  - remove 'pinctrl-' prefix for pinctrl sub-nodes
> >  - separate config and mux nodes
> > 
> > Changes since RFC v2:
> >  - add pinconf properties to zc702 mdio node
> >  - remove arguments from bias-related props
> > 
> > Changes since RFC v1:
> >  - separate DT changes into their own patch
> > ---
> >  arch/arm/boot/dts/zynq-7000.dtsi |   8 +-
> >  arch/arm/boot/dts/zynq-zc702.dts | 181 +++++++++++++++++++++++++++++++++++++++
> >  arch/arm/boot/dts/zynq-zc706.dts | 152 ++++++++++++++++++++++++++++++++
> >  3 files changed, 340 insertions(+), 1 deletion(-)
> [...]
> > diff --git a/arch/arm/boot/dts/zynq-zc702.dts b/arch/arm/boot/dts/zynq-zc702.dts
> > index 280f02dd4ddc..4995412f116f 100644
> > --- a/arch/arm/boot/dts/zynq-zc702.dts
> > +++ b/arch/arm/boot/dts/zynq-zc702.dts
> [...]
> > @@ -50,15 +52,24 @@
> >  	status = "okay";
> >  	phy-mode = "rgmii-id";
> >  	phy-handle = <&ethernet_phy>;
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&pinctrl_gem0_default>;
> >  
> >  	ethernet_phy: ethernet-phy@7 {
> >  		reg = <7>;
> >  	};
> >  };
> >  
> > +&gpio0 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&pinctrl_gpio0_default>;
> 
> On linux-next the equivalent no longer works for the Parallella, with
> gpio failing to probe.
> 
> If I move these two properties to the leds node (for which I am
> configuring gpio 7) then I get a heartbeat as before.

I think for USB I have a fix (see other email with patch), but LEDs seem
to be broken too. On my zc702 I get:
   of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/ds23[0]' - status (-517)

517 is probe deferral. Looks like the LED driver needs to learn to defer
probing when the GPIO driver isn't available yet.

	Sören
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