arm64: dts: ti: am64-phyboard-electra: Add overlay to enable a GPIO fan

The phyBOARD-Electra has a GPIO fan header. This overlay enables the fan
header and sets the fan to turn on at 65C.

Signed-off-by: Nathan Morrisson <nmorrisson@phytec.com>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
Link: https://lore.kernel.org/r/20240419193114.3090084-1-nmorrisson@phytec.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 9a722c2473fb7c3330a576188e22dbb1995d483c..fd91cf40af6de08ec71b51584c01eb1bf6e2dd62 100644 (file)
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -48,6 +48,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-pcie.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-usb3.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-gpio-fan.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
@@ -131,6 +132,8 @@ k3-am62p5-sk-csi2-tevi-ov5640-dtbs := k3-am62p5-sk.dtb \
        k3-am62x-sk-csi2-tevi-ov5640.dtbo
 k3-am642-evm-icssg1-dualemac-dtbs := \
        k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo
+k3-am642-phyboard-electra-gpio-fan-dtbs := \
+       k3-am642-phyboard-electra-rdk.dtb k3-am642-phyboard-electra-gpio-fan.dtbo
 k3-am642-tqma64xxl-mbax4xxl-sdcard-dtbs := \
        k3-am642-tqma64xxl-mbax4xxl.dtb k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
 k3-am642-tqma64xxl-mbax4xxl-wlan-dtbs := \
@@ -174,6 +177,7 @@ DTC_FLAGS_k3-am62-lp-sk += -@
 DTC_FLAGS_k3-am62a7-sk += -@
 DTC_FLAGS_k3-am62p5-sk += -@
 DTC_FLAGS_k3-am642-evm += -@
+DTC_FLAGS_k3-am642-phyboard-electra-rdk += -@
 DTC_FLAGS_k3-am642-tqma64xxl-mbax4xxl += -@
 DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
 DTC_FLAGS_k3-am68-sk-base-board += -@

diff --git a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-gpio-fan.dtso b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-gpio-fan.dtso
new file mode 100644 (file)
index 0000000..5057658
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-gpio-fan.dtso
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (C) 2024 PHYTEC America LLC
+ * Author: Nathan Morrisson <nmorrisson@phytec.com>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/thermal/thermal.h>
+#include "k3-pinctrl.h"
+
+&{/} {
+       fan: gpio-fan {
+               compatible = "gpio-fan";
+               gpio-fan,speed-map = <0 0 8600 1>;
+               gpios = <&main_gpio0 28 GPIO_ACTIVE_LOW>;
+               #cooling-cells = <2>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&gpio_fan_pins_default>;
+       };
+};
+
+&main_pmx0 {
+       gpio_fan_pins_default: gpio-fan-default-pins {
+               pinctrl-single,pins = <
+                       AM64X_IOPAD(0x070, PIN_OUTPUT, 7) /* (V18) GPMC0_AD13.GPIO0_28 */
+               >;
+       };
+};
+
+&thermal_zones {
+       main0_thermal: main0-thermal {
+               trips {
+                       main0_thermal_trip0: main0-thermal-trip {
+                               temperature = <65000>;  /* millicelsius */
+                               hysteresis = <2000>;    /* millicelsius */
+                               type = "active";
+                       };
+               };
+
+               cooling-maps {
+                       map0 {
+                               trip = <&main0_thermal_trip0>;
+                               cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+                       };
+               };
+       };
+};