linux-kernel - Re: [PATCHv3 2/3] ARM: mxs: cfa10049: Switch bus i2c1 to bitbanging

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Date:	Tue, 2 Jul 2013 08:45:56 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	Shawn Guo <shawn.guo@...aro.org>,
	Jonathan Cameron <jic23@....ac.uk>, brian@...stalfontz.com,
	linux-doc@...r.kernel.org, linux-iio@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org, jimwall@...om,
	Rob Herring <rob.herring@...xeda.com>,
	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Landley <rob@...dley.net>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Lucas Stach <l.stach@...gutronix.de>,
	Marek Vasut <marex@...x.de>
Subject: Re: [PATCHv3 2/3] ARM: mxs: cfa10049: Switch bus i2c1 to bitbanging

On Tue, Jul 2, 2013 at 8:35 AM, Alexandre Belloni
<alexandre.belloni@...e-electrons.com> wrote:

> mxs-i2c 8005a000.i2c: Failed to get PIO reg. write descriptor.
>
> That is the one line 243. I'm open to any suggestion.
>
> BTW, I also tested PIO mode with and without touchscreen support as that
> seemed to toggle the issue on your side. It is also worse than what it
> was in 3.9. Trying to read the nau7802 ADC never returns.
>
> The excerpt from my DT:
>
> i2c1: i2c@...5a000 {
>         pinctrl-names = "default";
>         pinctrl-0 = <&i2c1_pins_a>;
>         status = "okay";
> };
>
> i2cmux {
>         compatible = "i2c-mux-gpio";
>         #address-cells = <1>;
>         #size-cells = <0>;
>         pinctrl-names = "default";
>         pinctrl-0 = <&i2cmux_pins_cfa10049>;
>         mux-gpios = <&gpio1 22 0 &gpio1 23 0>;
>         i2c-parent = <&i2c1>;
>
>         i2c@0 {
>                 reg = <0>;

Shouldn't this be

         i2c@1 {
                 reg = <1>; ?
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