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arm64: dts: ti: k3-am68-phyboard-izar: Add pwm fan

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Add an overlay to control the pwm fan[0] that comes with the kit.

[0] https://www.sepa-europe.com/en/2023/06/16/axial-fan-lf40p/

Signed-off-by: Dominik Haller <d.haller@phytec.de>
Link: https://patch.msgid.link/20260716000827.84982-1-d.haller@phytec.de
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Dominik Haller 2026-07-15 17:08:25 -07:00 committed by Vignesh Raghavendra
parent 77b7c62b50
commit ce470cc95b
2 changed files with 79 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm64/boot/dts/ti/Makefile
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@ -185,7 +185,10 @@ k3-am68-phyboard-izar-lvds-ph128800t006-dtbs := k3-am68-phyboard-izar.dtb \
k3-am68-phyboard-izar-lvds-ph128800t006.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am68-phyboard-izar-peb-av-15.dtb
k3-am68-phyboard-izar-peb-av-15-dtbs := k3-am68-phyboard-izar.dtb \
k3-am68-phyboard-izar-peb-av-15.dtbo
k3-am68-phyboard-izar-peb-av-15.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am68-phyboard-izar-pwm-fan.dtb
k3-am68-phyboard-izar-pwm-fan-dtbs := k3-am68-phyboard-izar.dtb \
k3-am68-phyboard-izar-pwm-fan.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board-pcie1-ep.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
@ -467,6 +470,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
k3-am642-tqma64xxl-mbax4xxl-wlan.dtb \
k3-am68-phyboard-izar-lvds-ph128800t006.dtb \
k3-am68-phyboard-izar-peb-av-15.dtb \
k3-am68-phyboard-izar-pwm-fan.dtb \
k3-am68-sk-base-board-csi2-dual-imx219.dtb \
k3-am68-sk-base-board-pcie1-ep.dtb \
k3-am69-aquila-clover-panel-cap-touch-7inch-dsi.dtb \

74
arch/arm64/boot/dts/ti/k3-am68-phyboard-izar-pwm-fan.dtso Normal file
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@ -0,0 +1,74 @@
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
* Copyright (C) 2026 PHYTEC Messtechnik GmbH
* Author: Dominik Haller <d.haller@phytec.de>
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/pwm/pwm.h>
#include "k3-pinctrl.h"
&{/} {
pwmfan: pwm-fan {
compatible = "pwm-fan";
pinctrl-names = "default";
pinctrl-0 = <&main_pwmfan_default_pins>;
#cooling-cells = <2>;
cooling-levels = <0 90 150 255>;
/* frequency needs to be the same as lvds backlight */
pwms = <&main_ehrpwm0 0 44000 PWM_POLARITY_INVERTED>;
};
};
&main_pmx0 {
main_pwmfan_default_pins: main-pwmfan-default-pins {
pinctrl-single,pins = <
J721S2_IOPAD(0x0cc, PIN_OUTPUT, 5) /* (AE27) SPI0_CS0.EHRPWM0_A */
>;
};
};
&main_ehrpwm0 {
status = "okay";
};
&main3_thermal {
trips {
cpu_low: cpu-low {
hysteresis = <3000>;
temperature = <55000>;
type = "active";
};
cpu_med: cpu-med {
hysteresis = <3000>;
temperature = <60000>;
type = "active";
};
cpu_high: cpu-high {
hysteresis = <3000>;
temperature = <65000>;
type = "active";
};
};
cooling-maps {
map1 {
cooling-device = <&pwmfan 1 1>;
trip = <&cpu_low>;
};
map2 {
cooling-device = <&pwmfan 2 2>;
trip = <&cpu_med>;
};
map3 {
cooling-device = <&pwmfan 3 3>;
trip = <&cpu_high>;
};
};
};