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arm64: dts: ti: var-som-am62p: Add support for ADS7846 touchscreen

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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 <stefano.radaelli21@gmail.com>
Link: https://patch.msgid.link/20251003125031.30539-4-stefano.radaelli21@gmail.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Stefano Radaelli
2025-10-03 14:50:29 +02:00
committed by Vignesh Raghavendra
parent 6f41007cf8
commit 397dae3cec
1 changed files with 24 additions and 0 deletions
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24
arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
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@@ -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 {