On Thu, 2020-05-07 at 19:15 +0800, dillon.min...@gmail.com wrote:
> From: dillon min <dillon.min...@gmail.com>
>
> Enable the stmpe811 touch screen on stm32429-disco board.
>
> Signed-off-by: dillon min <dillon.min...@gmail.com>
>
> [PATCH 3/4]: ARM: dts: stm32: enable stmpe811 on stm32429-disco
>
> V2:
> patch 3: remove unused id, blocks, irq-trigger
>
> V1:
> patch 4: fix read touch screen xyz timeout bug
> patch 3: enable stmpe_touchscreen on stm32f429-disco board
> patch 2: add i2c3 pin mux for stm32f4
> patch 1: add i2c3 controller interface for stm32f4
>
> Signed-off-by: dillon min <dillon.min...@gmail.com>
For the STMPE part:
Reviewed-by: Philippe Schenker <philippe.schen...@toradex.com>
> ---
> 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 30c0f67..fad1ec1 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>;
> + };
> + };
> +};
