linux-kernel - Re: [PATCH] arm64: dts: ti: am64-phyboard-electra: Add overlay to enable a GPIO fan

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Message-ID: <95022657-c82c-4e20-9a3d-f83acf9911d8@phytec.de>
Date: Tue, 23 Apr 2024 14:46:14 +0200
From: Wadim Egorov <w.egorov@...tec.de>
To: Nathan Morrisson <nmorrisson@...tec.com>, <nm@...com>, <vigneshr@...com>,
	<kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <upstream@...ts.phytec.de>
Subject: Re: [PATCH] arm64: dts: ti: am64-phyboard-electra: Add overlay to
 enable a GPIO fan



Am 19.04.24 um 21:31 schrieb Nathan Morrisson:
> 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@...tec.com>

Reviewed-by: Wadim Egorov <w.egorov@...tec.de>

> ---
>   arch/arm64/boot/dts/ti/Makefile               |  4 ++
>   .../k3-am642-phyboard-electra-gpio-fan.dtso   | 50 +++++++++++++++++++
>   2 files changed, 54 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-gpio-fan.dtso
> 
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index 9a722c2473fb..fd91cf40af6d 100644
> --- 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
> index 000000000000..5057658061b4
> --- /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@...tec.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>;
> +			};
> +		};
> +	};
> +};