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SubjectRe: [PATCH v2] arm: dts: imx6qdl: add gpio expander pca9535
Hi Gilles,

On 19-09-12 06:01, Gilles Doffe wrote:
> Hi Marco,
>
> Thanks for your reply and sorry about the delay.

No worries ;)

> ----- Le 22 Juil 19, à 9:53, Marco Felsch m.felsch@pengutronix.de a écrit :
>
> > Hi Gilles,
> >
> > can you adapt the patch title, I assumed that the base dtsi is adding a
> > gpio-expander which makes no sense.
>
> My first intent was to add the gpio-expander pca9535 into the imx6q-rex-pro.dts and in a future imx6qp-rex-ultra.dts
> However I noticed that the sgtl5000 was already in the dtsi.
> It is maybe due to the fact that like the pca9535, the sgtl5000 is present on the baseboard not on the SOM.
> Thus I guess that baseboard stuff common to all rex SOM should be in imx6qdl-rex.dtsi and not in the dts.
> Does-it seem correct to you ?

Yes this is correct what Shawn and I mean is that you should adapt the
commit title. Shawn already give you an example.

> >
> > On 19-07-19 12:46, Gilles DOFFE wrote:
> >> The pca9535 gpio expander is present on the Rex baseboard, but missing
> >> from the dtsi.
> >>
> >> Add the new gpio controller and the associated interrupt line
> >> MX6QDL_PAD_NANDF_CS3__GPIO6_IO16.
> >>
> >> Signed-off-by: Gilles DOFFE <gilles.doffe@savoirfairelinux.com>
> >> ---
> >
> > Having a changelog would be nice too.
> >
> >> arch/arm/boot/dts/imx6qdl-rex.dtsi | 19 +++++++++++++++++++
> >> 1 file changed, 19 insertions(+)
> >>
> >> diff --git a/arch/arm/boot/dts/imx6qdl-rex.dtsi
> >> b/arch/arm/boot/dts/imx6qdl-rex.dtsi
> >> index 97f1659144ea..b517efb22fcb 100644
> >> --- a/arch/arm/boot/dts/imx6qdl-rex.dtsi
> >> +++ b/arch/arm/boot/dts/imx6qdl-rex.dtsi
> >> @@ -136,6 +136,19 @@
> >> compatible = "atmel,24c02";
> >> reg = <0x57>;
> >> };
> >> +
> >> + pca9535: gpio8@27 {
> >> + compatible = "nxp,pca9535";
> >> + reg = <0x27>;
> >
> > The i2c devices are orderd by their i2c-addresses starting from the
> > lowest.
> >
>
> Ack.
>
> >> + gpio-controller;
> >> + #gpio-cells = <2>;
> >> + pinctrl-names = "default";
> >> + pinctrl-0 = <&pinctrl_pca9535>;
> >> + interrupt-parent = <&gpio6>;
> >> + interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
> >> + interrupt-controller;
> >> + #interrupt-cells = <2>;

As you pointed out above this device isn't available on the
imx6dl-rex-basic? You should add: 'status = "disabled";' if this is the
case.

Regards,
Marco

> >> + };
> >> };
> >>
> >> &i2c3 {
> >> @@ -237,6 +250,12 @@
> >> >;
> >> };
> >>
> >> + pinctrl_pca9535: pca9535 {
> >> + fsl,pins = <
> >> + MX6QDL_PAD_NANDF_CS3__GPIO6_IO16 0x00017059
> >
> > The pinmux below don't use the leading zero's if you are the first I
> > would drop that.
> >
> > Regards,
> > Marco
> >
>
> Ack.
>
> Regards,
> Gilles
>

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