Hi Andreas,
On 22-11-09, Andreas Kemnade wrote:
> On Wed, 9 Nov 2022 10:23:50 +0100
> Marco Felsch <m.felsch@xxxxxxxxxxxxxx> wrote:
>
> > Hi Andreas,
> >
> > On 22-11-08, Andreas Kemnade wrote:
> > > Add the touchscreen now, since the driver is available.
> > >
> > > Signed-off-by: Andreas Kemnade <andreas@xxxxxxxxxxxx>
> > > ---
> > > Changes in v3: no phandles pointing from dtsi to dts
> >
> > Thanks for this change...
> >
> > > Changes in v2: fix pinmux naming
> > >
> > > arch/arm/boot/dts/e60k02.dtsi | 9 ++++++++-
> > > arch/arm/boot/dts/imx6sl-tolino-shine3.dts | 12 ++++++++++++
> > > arch/arm/boot/dts/imx6sll-kobo-clarahd.dts | 12 ++++++++++++
> > > 3 files changed, 32 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm/boot/dts/e60k02.dtsi
> > > b/arch/arm/boot/dts/e60k02.dtsi index 935e2359f8df..99091db3ab2a
> > > 100644 --- a/arch/arm/boot/dts/e60k02.dtsi
> > > +++ b/arch/arm/boot/dts/e60k02.dtsi
> > > @@ -104,7 +104,14 @@ &i2c2 {
> > > clock-frequency = <100000>;
> > > status = "okay";
> > >
> > > - /* TODO: CYTTSP5 touch controller at 0x24 */
> > > + cyttsp5: touchscreen@24 {
> > > + compatible = "cypress,tt21000";
> > > + reg = <0x24>;
> > > + interrupt-parent = <&gpio5>;
> > > + interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
> > > + reset-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
> > > + vdd-supply = <&ldo5_reg>;
> > > + };
> >
> > but we still have a cross-reference to the .dtsi file here. Therefore
> > I said to move the interrupt/reset-gpio into the dts file too. I know
> > this is a kind of a nitpick but I really don't like such
> > cross-references.
> >
> hmm. &gpio5 references to imx6sl[l].dtsi, not dts, so what is the
> problem here?
Sorry for the missunderstanding, I didn't mean the phandle. I mean the
mux setting which is done in the dts right? I'm just not a fan of
muxing pins in one file an using those 'assumptions' in others. Except
for platforms like the imx8mm-evk which is exactly the same hardware and
only differs in the RAM they used. But you have two different platforms
right?
Hope this clears some of the confusions.
> And we have this pattern all over the place.
>
> What is different to the touchscreen that this pattern is not wanted
> here but
> accepted everywhere else? It is there for
> - backlight
> - irq of pmic
> - reset/gpio-regulator of wifi
> - leds
> - keys
>
> And you have also done some review work there.
>
> Here I am caring a bit about readability since I have still to do
> maintenance work on this file, so I am a bit more concerned than that
> it a) just works and b) is being accepted upstream.
>
> If it is not allowed to have common things in the e60k02.dtsi file, what
> about ditching that file alltogether and just have the two .dts files?
>
> I personally prefer the v2 variant, but v3 is a compromise.
>
> For comparison, the feature-complete version used by postmarketOS is
> here:
> https://github.com/akemnade/linux/blob/kobo/drm-merged-5.19/arch/arm/boot/dts/e60k02.dtsi
>
> Regards,
> Andreas
>
