[PATCH 2/5 v3] ARM: at91: sam9g20 add i2c DT support
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Fri Mar 9 20:53:36 EST 2012
On 11:08 Thu 08 Mar , Rob Herring wrote:
> On 03/08/2012 02:50 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > For now on use i2c-gpio driver on the same pin as the hardware IP.
> >
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> > Cc: Nicolas Ferre <nicolas.ferre at atmel.com>
> > Cc: devicetree-discuss at lists.ozlabs.org
> > ---
> > v3:
> >
> > update i2c binding (Rob comments)
> >
> > Best Regards,
> > J.
> > arch/arm/boot/dts/at91sam9g20.dtsi | 13 +++++++++++++
> > 1 files changed, 13 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/at91sam9g20.dtsi b/arch/arm/boot/dts/at91sam9g20.dtsi
> > index 4b0dc99..072b2da 100644
> > --- a/arch/arm/boot/dts/at91sam9g20.dtsi
> > +++ b/arch/arm/boot/dts/at91sam9g20.dtsi
> > @@ -189,4 +189,17 @@
> > status = "disabled";
> > };
> > };
> > +> > + i2c-gpio at 0 {
>
> You updated the example, but not all the actual uses to i2c at 0.
on purpose as on some soc we will have HW and soft binding
on the board you put the alias
Best Regards,
J.
>
> Rob
>
> > + compatible = "i2c-gpio";
> > + gpios = <&pioA 23 0 /* sda */
> > + &pioA 24 0 /* scl */
> > + >;
> > + i2c-gpio,sda-open-drain;
> > + i2c-gpio,scl-open-drain;
> > + i2c-gpio,delay-us = <2>; /* ~100 kHz */
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + status = "disabled";
> > + };
> > };
>
>
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