From 1c9aa677623b9579b3d1a6339cc95ffe75a90e25 Mon Sep 17 00:00:00 2001 From: dillon min Date: Tue, 9 Jun 2020 21:26:42 +0800 Subject: [PATCH] ARM: dts: stm32: enable stmpe811 on stm32429-disco board Enable the stmpe811 touch screen on stm32429-disco board. Signed-off-by: dillon min Reviewed-by: Philippe Schenker Signed-off-by: Alexandre Torgue --- arch/arm/boot/dts/stm32f429-disco.dts | 45 +++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts index baed482..f125d30 100644 --- a/arch/arm/boot/dts/stm32f429-disco.dts +++ b/arch/arm/boot/dts/stm32f429-disco.dts @@ -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>; + }; + }; +}; + <dc { status = "okay"; pinctrl-0 = <<dc_pins_b>; -- 2.7.4