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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: u.kleine-koenig@pengutronix.de, linux-kernel@vger.kernel.org,
	Rob Herring <robh+dt@kernel.org>,
	Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: devel@driverdev.osuosl.org, linux-pwm@vger.kernel.org,
	f.fainelli@gmail.com, devicetree@vger.kernel.org,
	sboyd@kernel.org, gregkh@linuxfoundation.org,
	linus.walleij@linaro.org, dmitry.torokhov@gmail.com,
	linux-gpio@vger.kernel.org, andy.shevchenko@gmail.com,
	bcm-kernel-feedback-list@broadcom.com, wahrenst@gmx.net,
	p.zabel@pengutronix.de, linux-input@vger.kernel.org,
	bgolaszewski@baylibre.com, linux-clk@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rpi-kernel@lists.infradead.org
Subject: [PATCH v5 10/11] DO NOT MERGE: ARM: dts: Add RPi's official PoE hat support
Date: Mon, 23 Nov 2020 19:38:31 +0100
Message-ID: <20201123183833.18750-11-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201123183833.18750-1-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>

---

Changes since v1:
 - Update patch to use 2 pwm cells

 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 403bacf986eb..9ae44620c5b8 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-poe-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 80000>;
+	};
+
+	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-poe-pwm";
+		#pwm-cells = <2>;
+	};
 };
 
 &gpio {
-- 
2.29.2

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  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-23 18:38 [PATCH v5 00/11] Raspberry Pi PoE HAT fan support Nicolas Saenz Julienne
2020-11-23 18:38 ` [PATCH v5 01/11] firmware: raspberrypi: Keep count of all consumers Nicolas Saenz Julienne
2020-12-02 17:26   ` Florian Fainelli
2020-12-03  8:05   ` Bartosz Golaszewski
2020-12-03  8:53     ` Nicolas Saenz Julienne
2020-11-23 18:38 ` [PATCH v5 02/11] firmware: raspberrypi: Introduce devm_rpi_firmware_get() Nicolas Saenz Julienne
2020-12-02 17:27   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 03/11] clk: bcm: rpi: Release firmware handle on unbind Nicolas Saenz Julienne
2020-12-02 17:28   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 04/11] gpio: raspberrypi-exp: " Nicolas Saenz Julienne
2020-12-02 17:29   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 05/11] reset: raspberrypi: " Nicolas Saenz Julienne
2020-12-02 17:29   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 06/11] soc: bcm: raspberrypi-power: " Nicolas Saenz Julienne
2020-12-02 17:55   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 07/11] staging: vchiq: " Nicolas Saenz Julienne
2020-12-02 17:56   ` Florian Fainelli
2020-11-23 18:38 ` [PATCH v5 08/11] input: raspberrypi-ts: Release firmware handle when not needed Nicolas Saenz Julienne
2020-12-02  6:03   ` Dmitry Torokhov
2020-12-03 14:52     ` Nicolas Saenz Julienne
2020-11-23 18:38 ` [PATCH v5 09/11] dt-bindings: pwm: Add binding for RPi firmware PWM bus Nicolas Saenz Julienne
2020-11-23 18:38 ` Nicolas Saenz Julienne [this message]
2020-11-23 18:38 ` [PATCH v5 11/11] pwm: Add Raspberry Pi Firmware based " Nicolas Saenz Julienne
2020-12-09 10:42   ` Nicolas Saenz Julienne

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