From: dillon min <dillon.minfei@xxxxxxxxx>
Enable the stmpe811 touch screen on stm32429-disco board.
Signed-off-by: dillon min <dillon.minfei@xxxxxxxxx>
---
arch/arm/boot/dts/stm32f429-disco.dts | 47 +++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts
index 30c0f6717871..fad1ec10efb6 100644
--- a/arch/arm/boot/dts/stm32f429-disco.dts
+++ b/arch/arm/boot/dts/stm32f429-disco.dts
@@ -49,6 +49,8 @@
#include "stm32f429.dtsi"
#include "stm32f429-pinctrl.dtsi"
#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>
/ {
model = "STMicroelectronics STM32F429i-DISCO board";
@@ -127,3 +129,48 @@
pinctrl-names = "default";
status = "okay";
};
+
+&i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c3_pins>;
+ clock-frequency = <100000>;
+ status = "okay";
+
+ stmpe811@41 {
+ compatible = "st,stmpe811";
+ reg = <0x41>;
+ interrupts = <15 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-parent = <&gpioa>;
+ /* 3.25 MHz ADC clock speed */
+ st,adc-freq = <1>;
+ /* 12-bit ADC */
+ st,mod-12b = <1>;
+ /* internal ADC reference */
+ st,ref-sel = <0>;
+ /* ADC converstion time: 80 clocks */
+ st,sample-time = <4>;
+
+ stmpe_touchscreen {
+ compatible = "st,stmpe-ts";
+ /* 8 sample average control */
+ st,ave-ctrl = <3>;
+ /* 7 length fractional part in z */
+ st,fraction-z = <7>;
+ /*
+ * 50 mA typical 80 mA max touchscreen drivers
+ * current limit value
+ */
+ st,i-drive = <1>;
+ /* 1 ms panel driver settling time */
+ st,settling = <3>;
+ /* 5 ms touch detect interrupt delay */
+ st,touch-det-delay = <5>;
+ };
+
+ stmpe_adc {
+ compatible = "st,stmpe-adc";
+ /* forbid to use ADC channels 3-0 (touch) */
+ st,norequest-mask = <0x0F>;
+ };
+ };
+};
--
2.7.4
