From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: f.fainelli@gmail.com, linux@roeck-us.net, jdelvare@suse.com,
wahrenst@gmx.net,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Eric Anholt" <eric@anholt.net>,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-pwm@vger.kernel.org, "Rob Herring" <robh+dt@kernel.org>,
"Nicolas Saenz Julienne" <nsaenzjulienne@suse.de>
Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] DO NOT MERGE: ARM: dts: Add RPi's official PoE hat support
Date: Fri, 9 Oct 2020 17:30:29 +0200 [thread overview]
Message-ID: <20201009153031.986-3-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201009153031.986-1-nsaenzjulienne@suse.de>
This is an example on how to enable the fan on top of RPi's official PoE
hat.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 54 +++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
index 09a1182c2936..98ecb9d82ecd 100644
--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -5,6 +5,7 @@
#include "bcm283x-rpi-usb-peripheral.dtsi"
#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
+#include <dt-bindings/pwm/raspberrypi,firmware-pwm.h>
/ {
compatible = "raspberrypi,4-model-b", "brcm,bcm2711";
@@ -68,6 +69,54 @@ sd_vcc_reg: sd_vcc_reg {
enable-active-high;
gpio = <&expgpio 6 GPIO_ACTIVE_HIGH>;
};
+
+ fan: pwm-fan {
+ compatible = "pwm-fan";
+ cooling-levels = <0 50 150 255>;
+ #cooling-cells = <2>;
+ pwms = <&fwpwm RASPBERRYPI_FIRMWARE_PWM_POE>;
+ };
+
+ thermal-zones {
+ cpu_thermal: cpu-thermal {
+ trips {
+ threshold: trip-point@0 {
+ temperature = <45000>;
+ hysteresis = <5000>;
+ type = "active";
+ };
+
+ target: trip-point@1 {
+ temperature = <50000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+
+ cpu_hot: cpu_hot@0 {
+ temperature = <55000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+ };
+
+ cooling-maps {
+ map0 {
+ trip = <&threshold>;
+ cooling-device = <&fan 0 1>;
+ };
+
+ map1 {
+ trip = <&target>;
+ cooling-device = <&fan 1 2>;
+ };
+
+ map2 {
+ trip = <&cpu_hot>;
+ cooling-device = <&fan 2 3>;
+ };
+ };
+ };
+ };
};
&ddc0 {
@@ -103,6 +152,11 @@ reset: reset {
compatible = "raspberrypi,firmware-reset";
#reset-cells = <1>;
};
+
+ fwpwm: pwm {
+ compatible = "raspberrypi,firmware-pwm";
+ #pwm-cells = <1>;
+ };
};
&gpio {
--
2.28.0
next prev parent reply other threads:[~2020-10-09 15:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-09 15:30 [PATCH 0/3] Raspberry Pi 4 PoE HAT fan support Nicolas Saenz Julienne
2020-10-09 15:30 ` [PATCH 1/3] dt-bindings: pwm: Add binding for RPi firmware PWM bus Nicolas Saenz Julienne
2020-10-12 7:01 ` Uwe Kleine-König
2020-10-13 10:35 ` Nicolas Saenz Julienne
2020-10-13 12:08 ` Uwe Kleine-König
2020-10-13 12:33 ` Nicolas Saenz Julienne
2020-10-13 15:18 ` Uwe Kleine-König
2020-10-09 15:30 ` Nicolas Saenz Julienne [this message]
2020-10-09 15:30 ` [PATCH 3/3] pwm: Add Raspberry Pi Firmware based " Nicolas Saenz Julienne
2020-10-12 7:06 ` Uwe Kleine-König
2020-10-13 11:20 ` Nicolas Saenz Julienne
2020-10-13 12:17 ` Uwe Kleine-König
2020-10-13 16:50 ` Nicolas Saenz Julienne
2020-10-14 7:02 ` Uwe Kleine-König
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