mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 06:08:08 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
166 lines
4.8 KiB
Diff
166 lines
4.8 KiB
Diff
From 4bf62f8dc97e24dadda64762ab47c299ac6eb8cb Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Tue, 3 May 2022 17:20:11 +0100
|
|
Subject: [PATCH] dtoverlays: Add i2c-fan overlay
|
|
|
|
Add an i2c-fan overlay, initially with support for the EMC2301
|
|
fan controller found on the CM4IO board.
|
|
Based on the overlay from Traverse Technologies, but modified for
|
|
the EMC2305 driver submitted to linux-hwmon.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 33 +++++++
|
|
.../arm/boot/dts/overlays/i2c-fan-overlay.dts | 92 +++++++++++++++++++
|
|
3 files changed, 126 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/i2c-fan-overlay.dts
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -85,6 +85,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
|
|
hy28b-2017.dtbo \
|
|
i-sabre-q2m.dtbo \
|
|
i2c-bcm2708.dtbo \
|
|
+ i2c-fan.dtbo \
|
|
i2c-gpio.dtbo \
|
|
i2c-mux.dtbo \
|
|
i2c-pwm-pca9685a.dtbo \
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -1530,6 +1530,39 @@ Load: dtoverlay=i2c-bcm2708
|
|
Params: <None>
|
|
|
|
|
|
+Name: i2c-fan
|
|
+Info: Adds support for a number of I2C fan controllers
|
|
+Load: dtoverlay=i2c-fan,<param>=<val>
|
|
+Params: addr Sets the address for the fan controller. Note
|
|
+ that the device must be configured to use the
|
|
+ specified address.
|
|
+
|
|
+ i2c0 Choose the I2C0 bus on GPIOs 0&1
|
|
+
|
|
+ i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45
|
|
+
|
|
+ minpwm PWM setting for the fan when the SoC is below
|
|
+ mintemp (range 0-255. default 0)
|
|
+ maxpwm PWM setting for the fan when the SoC is above
|
|
+ maxtemp (range 0-255. default 255)
|
|
+ midtemp Temperature (in millicelcius) at which the fan
|
|
+ begins to speed up (default 50000)
|
|
+
|
|
+ midtemp_hyst Temperature delta (in millicelcius) below
|
|
+ mintemp at which the fan will drop to minrpm
|
|
+ (default 2000)
|
|
+
|
|
+ maxtemp Temperature (in millicelcius) at which the fan
|
|
+ will be held at maxrpm (default 70000)
|
|
+
|
|
+ maxtemp_hyst Temperature delta (in millicelcius) below
|
|
+ maxtemp at which the fan begins to slow down
|
|
+ (default 2000)
|
|
+
|
|
+ emc2301 Select the Microchip EMC230x controller family
|
|
+ - EMC2301, EMC2302, EMC2303, EMC2305.
|
|
+
|
|
+
|
|
Name: i2c-gpio
|
|
Info: Adds support for software i2c controller on gpio pins
|
|
Load: dtoverlay=i2c-gpio,<param>=<val>
|
|
--- /dev/null
|
|
+++ b/arch/arm/boot/dts/overlays/i2c-fan-overlay.dts
|
|
@@ -0,0 +1,92 @@
|
|
+// Definitions for I2C based sensors using the Industrial IO or HWMON interface.
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+#include <dt-bindings/thermal/thermal.h>
|
|
+
|
|
+/ {
|
|
+ compatible = "brcm,bcm2835";
|
|
+
|
|
+ fragment@0 {
|
|
+ target = <&i2cbus>;
|
|
+ __dormant__ {
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ status = "okay";
|
|
+
|
|
+ emc2301: emc2301@2f {
|
|
+ compatible = "microchip,emc2301";
|
|
+ reg = <0x2f>;
|
|
+ status = "okay";
|
|
+ #cooling-cells = <0x02>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+
|
|
+ frag100: fragment@100 {
|
|
+ target = <&i2c_arm>;
|
|
+ i2cbus: __overlay__ {
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@101 {
|
|
+ target = <&i2c0if>;
|
|
+ __dormant__ {
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@102 {
|
|
+ target = <&i2c0mux>;
|
|
+ __dormant__ {
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@103 {
|
|
+ target = <&cpu_thermal>;
|
|
+ polling-delay = <2000>; /* milliseconds */
|
|
+ __overlay__ {
|
|
+ trips {
|
|
+ fanmid0: fanmid0 {
|
|
+ temperature = <50000>;
|
|
+ hysteresis = <2000>;
|
|
+ type = "active";
|
|
+ };
|
|
+ fanmax0: fanmax0 {
|
|
+ temperature = <75000>;
|
|
+ hysteresis = <2000>;
|
|
+ type = "active";
|
|
+ };
|
|
+ };
|
|
+ cooling-maps {
|
|
+ map0: map0 {
|
|
+ trip = <&fanmid0>;
|
|
+ cooling-device = <&emc2301 2 6>;
|
|
+ };
|
|
+ map1: map1 {
|
|
+ trip = <&fanmax0>;
|
|
+ cooling-device = <&emc2301 7 THERMAL_NO_LIMIT>;
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+
|
|
+ __overrides__ {
|
|
+ i2c0 = <&frag100>,"target:0=",<&i2c0>;
|
|
+ i2c_csi_dsi = <&frag100>,"target:0=",<&i2c_csi_dsi>,
|
|
+ <0>,"+101+102";
|
|
+ addr = <&emc2301>,"reg:0";
|
|
+ minpwm = <&emc2301>,"emc2305,pwm-min;0";
|
|
+ maxpwm = <&emc2301>,"emc2305,pwm-max;0";
|
|
+ midtemp = <&fanmid0>,"temperature:0";
|
|
+ midtemp_hyst = <&fanmid0>,"hysteresis:0";
|
|
+ maxtemp = <&fanmax0>,"temperature:0";
|
|
+ maxtemp_hyst = <&fanmax0>,"hysteresis:0";
|
|
+
|
|
+ emc2301 = <0>,"+0",
|
|
+ <&map0>,"cooling-device:0=",<&emc2301>,
|
|
+ <&map1>,"cooling-device:0=",<&emc2301>;
|
|
+ };
|
|
+};
|