From 397dae3cecd7bfa8e77fa18edc38a69b9459811c Mon Sep 17 00:00:00 2001 From: Stefano Radaelli Date: Fri, 3 Oct 2025 14:50:29 +0200 Subject: [PATCH] arm64: dts: ti: var-som-am62p: Add support for ADS7846 touchscreen The VAR-SOM-AM62P integrates an ADS7846 resistive touchscreen controller. The controller is physically located on the SOM, and its signals are routed to the SOM pins, allowing carrier boards to make use of it. This patch adds the ADS7846 node under the appropriate SPI controller. Signed-off-by: Stefano Radaelli Link: https://patch.msgid.link/20251003125031.30539-4-stefano.radaelli21@gmail.com Signed-off-by: Vignesh Raghavendra --- arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi index aba72d0b767c1..fc5a3942cde00 100644 --- a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi @@ -322,6 +322,30 @@ pinctrl-0 = <&pinctrl_spi0>; ti,pindir-d0-out-d1-in; status = "okay"; + + /* Resistive touch controller */ + ads7846: touchscreen@0 { + compatible = "ti,ads7846"; + reg = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_restouch>; + interrupt-parent = <&main_gpio0>; + interrupts = <48 IRQ_TYPE_EDGE_FALLING>; + spi-max-frequency = <1500000>; + pendown-gpio = <&main_gpio0 48 GPIO_ACTIVE_LOW>; + ti,x-min = /bits/ 16 <125>; + ti,x-max = /bits/ 16 <4008>; + ti,y-min = /bits/ 16 <282>; + ti,y-max = /bits/ 16 <3864>; + ti,x-plate-ohms = /bits/ 16 <180>; + ti,pressure-max = /bits/ 16 <255>; + ti,debounce-max = /bits/ 16 <10>; + ti,debounce-tol = /bits/ 16 <3>; + ti,debounce-rep = /bits/ 16 <1>; + ti,settle-delay-usec = /bits/ 16 <150>; + ti,keep-vref-on; + wakeup-source; + }; }; &main_uart5 { -- 2.47.3