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ARM: dts: stm32: enable stmpe811 on stm32429-disco board

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Enable the stmpe811 touch screen on stm32429-disco board.

Signed-off-by: dillon min <dillon.minfei@gmail.com>
Reviewed-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
dillon min
2020-06-09 21:26:42 +08:00
committed by Alexandre Torgue
parent 4409aeae98
commit 1c9aa67762
1 changed files with 45 additions and 0 deletions
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45
arch/arm/boot/dts/stm32f429-disco.dts
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@@ -110,6 +110,51 @@
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>;
};
};
};
&ltdc {
status = "okay";
pinctrl-0 = <&ltdc_pins_b>;