2019-08-07 08:28:15

by Philippe Schenker

Subject: [PATCH v3 20/21] ARM: dts: imx6ull-colibri: Add touchscreen used with Eval Board

This adds the common touchscreen that is used with Toradex's
Eval Boards.

Signed-off-by: Philippe Schenker <[email protected]>

---

Changes in v3: None
Changes in v2:
- Removed f0710a, that is downstream only
- Changed to generic node name
- Better comment

.../arm/boot/dts/imx6ull-colibri-eval-v3.dtsi | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
index d3c4809f140e..78e74bfeca1b 100644
--- a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
+++ b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
@@ -112,6 +112,21 @@
&i2c1 {
status = "okay";

+ /*
+ * Touchscreen is using SODIMM 28/30, also used for PWM<B>, PWM<C>,
+ * aka pwm2, pwm3. so if you enable touchscreen, disable the pwms
+ */
+ touchscreen@4a {
+ compatible = "atmel,maxtouch";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_gpiotouch>;
+ reg = <0x4a>;
+ interrupt-parent = <&gpio4>;
+ interrupts = <16 IRQ_TYPE_EDGE_FALLING>; /* SODIMM 28 */
+ reset-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; /* SODIMM 30 */
+ status = "disabled";
+ };
+
/* M41T0M6 real time clock on carrier board */
m41t0m6: rtc@68 {
compatible = "st,m41t0";
@@ -188,3 +203,12 @@
sd-uhs-sdr104;
status = "okay";
};
+
+&iomuxc {
+ pinctrl_gpiotouch: touchgpios {
+ fsl,pins = <
+ MX6UL_PAD_NAND_DQS__GPIO4_IO16 0x74
+ MX6UL_PAD_ENET1_TX_EN__GPIO2_IO05 0x14
+ >;
+ };
+};
--
2.22.0

2019-08-09 17:25:15

by Marcel Ziswiler

Subject: Re: [PATCH v3 20/21] ARM: dts: imx6ull-colibri: Add touchscreen used with Eval Board

Hi Philippe

On Wed, 2019-08-07 at 08:26 +0000, Philippe Schenker wrote:
> This adds the common touchscreen that is used with Toradex's
> Eval Boards.

Is that really Eval Board specific?

> Signed-off-by: Philippe Schenker <[email protected]>
>
> ---
>
> Changes in v3: None
> Changes in v2:
> - Removed f0710a, that is downstream only
> - Changed to generic node name
> - Better comment
>
> .../arm/boot/dts/imx6ull-colibri-eval-v3.dtsi | 24
> +++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> index d3c4809f140e..78e74bfeca1b 100644
> --- a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> +++ b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> @@ -112,6 +112,21 @@
> &i2c1 {
> status = "okay";
>
> + /*
> + * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> PWM<C>,
> + * aka pwm2, pwm3. so if you enable touchscreen, disable the
> pwms
> + */
> + touchscreen@4a {
> + compatible = "atmel,maxtouch";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_gpiotouch>;
> + reg = <0x4a>;
> + interrupt-parent = <&gpio4>;
> + interrupts = <16 IRQ_TYPE_EDGE_FALLING>; /* SODIMM 28
> */
> + reset-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; /*
> SODIMM 30 */
> + status = "disabled";
> + };
> +
> /* M41T0M6 real time clock on carrier board */
> m41t0m6: rtc@68 {
> compatible = "st,m41t0";
> @@ -188,3 +203,12 @@
> sd-uhs-sdr104;
> status = "okay";
> };
> +
> +&iomuxc {
> + pinctrl_gpiotouch: touchgpios {
> + fsl,pins = <
> + MX6UL_PAD_NAND_DQS__GPIO4_IO16 0x74
> + MX6UL_PAD_ENET1_TX_EN__GPIO2_IO05 0x14
> + >;
> + };
> +};

I guess that could also be moved to the module's dtsi for any carrier board to potentially profit from.

Cheers

Marcel

2019-08-12 13:16:01

by Philippe Schenker

Subject: Re: [PATCH v3 20/21] ARM: dts: imx6ull-colibri: Add touchscreen used with Eval Board

On Fri, 2019-08-09 at 15:54 +0000, Marcel Ziswiler wrote:
> Hi Philippe
>
> On Wed, 2019-08-07 at 08:26 +0000, Philippe Schenker wrote:
> > This adds the common touchscreen that is used with Toradex's
> > Eval Boards.
>
> Is that really Eval Board specific?

Since we provide the needed signals as standard on every Eval Board,
this is not specific to the Eval Board.

>
> > Signed-off-by: Philippe Schenker <[email protected]>
> >
> > ---
> >
> > Changes in v3: None
> > Changes in v2:
> > - Removed f0710a, that is downstream only
> > - Changed to generic node name
> > - Better comment
> >
> > .../arm/boot/dts/imx6ull-colibri-eval-v3.dtsi | 24
> > +++++++++++++++++++
> > 1 file changed, 24 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> > b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> > index d3c4809f140e..78e74bfeca1b 100644
> > --- a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> > +++ b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
> > @@ -112,6 +112,21 @@
> > &i2c1 {
> > status = "okay";
> >
> > + /*
> > + * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> > PWM<C>,
> > + * aka pwm2, pwm3. so if you enable touchscreen, disable the
> > pwms
> > + */
> > + touchscreen@4a {
> > + compatible = "atmel,maxtouch";
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_gpiotouch>;
> > + reg = <0x4a>;
> > + interrupt-parent = <&gpio4>;
> > + interrupts = <16 IRQ_TYPE_EDGE_FALLING>; /* SODIMM 28
> > */
> > + reset-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; /*
> > SODIMM 30 */
> > + status = "disabled";
> > + };
> > +
> > /* M41T0M6 real time clock on carrier board */
> > m41t0m6: rtc@68 {
> > compatible = "st,m41t0";
> > @@ -188,3 +203,12 @@
> > sd-uhs-sdr104;
> > status = "okay";
> > };
> > +
> > +&iomuxc {
> > + pinctrl_gpiotouch: touchgpios {
> > + fsl,pins = <
> > + MX6UL_PAD_NAND_DQS__GPIO4_IO16 0x74
> > + MX6UL_PAD_ENET1_TX_EN__GPIO2_IO05 0x14
> > + >;
> > + };
> > +};
>
> I guess that could also be moved to the module's dtsi for any carrier
> board to potentially profit from.

I think this clearly is physically not present on our module so I would
not do that. I like to leave that in here as is, so it offers an example
of how to hook this touchscreen up in DT.

Philippe
>
> Cheers
>
> Marcel