On Fri, Mar 24, 2017 at 12:29:49PM +0530, Jagan Teki wrote:
> On Fri, Mar 24, 2017 at 10:46 AM, Shawn Guo <shawnguo@xxxxxxxxxx> wrote:
> > On Wed, Mar 22, 2017 at 11:18:10PM +0530, Jagan Teki wrote:
> >> From: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
> >>
> >> Add touchscreen node as i2c1 slave device on Engicam Is.IoT MX6UL
> >> modules, the touchscreen controlled 'st,stmpe-ts' connected via
> >> i2c with st,stmpe811 mfb interface.
> >
> > s/mfb/mfd?
> >
> >>
> >> Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
> >> Cc: Matteo Lisi <matteo.lisi@xxxxxxxxxxx>
> >> Cc: Michael Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx>
> >> Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
> >> ---
> >> arch/arm/boot/dts/imx6ul-isiot-common.dtsi | 34 ++++++++++++++++++++++++++++++
> >> 1 file changed, 34 insertions(+)
> >>
> >> diff --git a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> >> index 9660e20..b149b5e 100644
> >> --- a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> >> +++ b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> >> @@ -40,6 +40,34 @@
> >> * OTHER DEALINGS IN THE SOFTWARE.
> >> */
> >>
> >> +&i2c1 {
> >> + touch: stmpe811@44 {
> >
> > Label a MFD device 'touch'? Also, the node name should be generic. Not
> > sure what should be used for MFD device though.
>
> May be I can use stmpe811@41 the existing imx6qdl-apalis.dtsi using
> the similar notation.
Per application notes of stmpe811 below, I would suggest you name it
gpio-expander.
www.st.com/resource/zh/datasheet/CD00186725.pdf
>
> >
> >> + compatible = "st,stmpe811";
> >> + reg = <0x44>;
> >> + #address-cells = <1>;
> >> + #size-cells = <0>;
> >> + pinctrl-names = "default";
> >> + pinctrl-0 = <&pinctrl_stmpe_ts>;
> >
> > If this is for stmpe-ts, shouldn't be put into touchscreen child node?
>
> Actually this is interrupt pad, for the touch controller via stmpe so
> I can rename pinctrl_touch_int.
Or just pinctrl_stmpe.
>
> >
> >> + interrupt-parent = <&gpio1>;
> >> + interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
> >> + interrupt-controller;
> >> + #interrupt-cells = <2>;
> >> +
> >> + stmpe_touchscreen {
> >
> > 'stmpe: touchscreen {' might be better.
>
> stmpe_touchscreen {
>
> This is also compatible with existing dtsi files
We do not need to keep compatibility with something not good.
Shawn
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