The tsc2046 is an ADC used as touchscreen controller. To share as mach
code as possible, we should use it as actual ADC + virtual tochscreen
controller.
With this patch we make use of the new kernel IIO and HID infrastructure.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
arch/arm/boot/dts/imx6dl-plym2m.dts | 55 ++++++++++++++++++++---------
arch/arm/boot/dts/imx6dl-prtvt7.dts | 53 ++++++++++++++++++++-------
arch/arm/boot/dts/imx6dl-victgo.dts | 55 +++++++++++++++++++++--------
3 files changed, 120 insertions(+), 43 deletions(-)
diff --git a/arch/arm/boot/dts/imx6dl-plym2m.dts b/arch/arm/boot/dts/imx6dl-plym2m.dts
index 60fe5f14666e..e2afedae85cb 100644
--- a/arch/arm/boot/dts/imx6dl-plym2m.dts
+++ b/arch/arm/boot/dts/imx6dl-plym2m.dts
@@ -101,6 +101,17 @@ reg_12v0: regulator-12v0 {
regulator-min-microvolt = <12000000>;
regulator-max-microvolt = <12000000>;
};
+
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ io-channels = <&adc 1>, <&adc 3>, <&adc 4>, <&adc 5>;
+ io-channel-names = "y", "z1", "z2", "x";
+ touchscreen-min-pressure = <64687>;
+ touchscreen-inverted-x;
+ touchscreen-inverted-y;
+ touchscreen-x-plate-ohms = <300>;
+ touchscreen-y-plate-ohms = <800>;
+ };
};
&can1 {
@@ -129,26 +140,38 @@ &ecspi2 {
pinctrl-0 = <&pinctrl_ecspi2>;
status = "okay";
- touchscreen@0 {
- compatible = "ti,tsc2046";
+ adc: adc@0 {
+ compatible = "ti,tsc2046e-adc";
reg = <0>;
pinctrl-0 = <&pinctrl_tsc2046>;
pinctrl-names ="default";
- spi-max-frequency = <100000>;
- interrupts-extended = <&gpio3 20 IRQ_TYPE_EDGE_FALLING>;
- pendown-gpio = <&gpio3 20 GPIO_ACTIVE_LOW>;
+ spi-max-frequency = <1000000>;
+ interrupts-extended = <&gpio3 20 IRQ_TYPE_LEVEL_LOW>;
+ #io-channel-cells = <1>;
- touchscreen-inverted-x;
- touchscreen-inverted-y;
- touchscreen-max-pressure = <4095>;
-
- ti,vref-delay-usecs = /bits/ 16 <100>;
- ti,x-plate-ohms = /bits/ 16 <800>;
- ti,y-plate-ohms = /bits/ 16 <300>;
- ti,debounce-max = /bits/ 16 <3>;
- ti,debounce-tol = /bits/ 16 <70>;
- ti,debounce-rep = /bits/ 16 <3>;
- wakeup-source;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@1 {
+ reg = <1>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@3 {
+ reg = <3>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@4 {
+ reg = <4>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@5 {
+ reg = <5>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
};
};
diff --git a/arch/arm/boot/dts/imx6dl-prtvt7.dts b/arch/arm/boot/dts/imx6dl-prtvt7.dts
index 02b53df03e6f..c361e0683973 100644
--- a/arch/arm/boot/dts/imx6dl-prtvt7.dts
+++ b/arch/arm/boot/dts/imx6dl-prtvt7.dts
@@ -235,6 +235,17 @@ simple-audio-card,codec {
frame-master;
};
};
+
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ io-channels = <&adc 1>, <&adc 3>, <&adc 4>, <&adc 5>;
+ io-channel-names = "y", "z1", "z2", "x";
+ touchscreen-min-pressure = <64687>;
+ touchscreen-inverted-x;
+ touchscreen-inverted-y;
+ touchscreen-x-plate-ohms = <300>;
+ touchscreen-y-plate-ohms = <800>;
+ };
};
&audmux {
@@ -277,22 +288,38 @@ &ecspi2 {
pinctrl-0 = <&pinctrl_ecspi2>;
status = "okay";
- touchscreen@0 {
- compatible = "ti,tsc2046";
+ adc: adc@0 {
+ compatible = "ti,tsc2046e-adc";
reg = <0>;
pinctrl-0 = <&pinctrl_tsc>;
pinctrl-names ="default";
- spi-max-frequency = <100000>;
- interrupts-extended = <&gpio3 20 IRQ_TYPE_EDGE_FALLING>;
- pendown-gpio = <&gpio3 20 GPIO_ACTIVE_LOW>;
- touchscreen-max-pressure = <4095>;
- ti,vref-delay-usecs = /bits/ 16 <100>;
- ti,x-plate-ohms = /bits/ 16 <800>;
- ti,y-plate-ohms = /bits/ 16 <300>;
- ti,debounce-max = /bits/ 16 <3>;
- ti,debounce-tol = /bits/ 16 <70>;
- ti,debounce-rep = /bits/ 16 <3>;
- wakeup-source;
+ spi-max-frequency = <1000000>;
+ interrupts-extended = <&gpio3 20 IRQ_TYPE_LEVEL_LOW>;
+ #io-channel-cells = <1>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@1 {
+ reg = <1>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@3 {
+ reg = <3>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@4 {
+ reg = <4>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@5 {
+ reg = <5>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
};
};
diff --git a/arch/arm/boot/dts/imx6dl-victgo.dts b/arch/arm/boot/dts/imx6dl-victgo.dts
index d37ba4ed847d..b5004b322d44 100644
--- a/arch/arm/boot/dts/imx6dl-victgo.dts
+++ b/arch/arm/boot/dts/imx6dl-victgo.dts
@@ -181,6 +181,17 @@ simple-audio-card,codec {
frame-master;
};
};
+
+ touchscreen {
+ compatible = "resistive-adc-touch";
+ io-channels = <&adc 1>, <&adc 3>, <&adc 4>, <&adc 5>;
+ io-channel-names = "y", "z1", "z2", "x";
+ touchscreen-min-pressure = <64687>;
+ touchscreen-inverted-x;
+ touchscreen-inverted-y;
+ touchscreen-x-plate-ohms = <300>;
+ touchscreen-y-plate-ohms = <800>;
+ };
};
&audmux {
@@ -244,22 +255,38 @@ &ecspi2 {
pinctrl-0 = <&pinctrl_ecspi2>;
status = "okay";
- touchscreen@0 {
- compatible = "ti,tsc2046";
+ adc: adc@0 {
+ compatible = "ti,tsc2046e-adc";
reg = <0>;
- pinctrl-names = "default";
pinctrl-0 = <&pinctrl_touchscreen>;
- spi-max-frequency = <200000>;
- interrupts-extended = <&gpio5 8 IRQ_TYPE_EDGE_FALLING>;
- pendown-gpio = <&gpio5 8 GPIO_ACTIVE_LOW>;
- touchscreen-size-x = <800>;
- touchscreen-size-y = <480>;
- touchscreen-inverted-y;
- touchscreen-max-pressure = <4095>;
- ti,vref-delay-usecs = /bits/ 16 <100>;
- ti,x-plate-ohms = /bits/ 16 <800>;
- ti,y-plate-ohms = /bits/ 16 <300>;
- wakeup-source;
+ pinctrl-names ="default";
+ spi-max-frequency = <1000000>;
+ interrupts-extended = <&gpio5 8 IRQ_TYPE_LEVEL_LOW>;
+ #io-channel-cells = <1>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@1 {
+ reg = <1>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@3 {
+ reg = <3>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@4 {
+ reg = <4>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
+ channel@5 {
+ reg = <5>;
+ settling-time-us = <700>;
+ oversampling-ratio = <5>;
+ };
};
};
--
2.30.2
