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mvebu: LS421DE: use automatic fan control with thermal zones 

The Buffalo Linkstation LS421DE has a chassis fan for cooling two internal
hard drives. Currently there is no control over this fan, running always
at fixed medium speed.

With the recent jump to the kernel 5.4, now we can monitor the hard drive
temperature and control the fan with thermal zones.

Install the kmod-hwmon-drivetemp module and wire up a thermal zone on the
dts file to allow automatic fan control by the kernel.

Tested succesfully using a single Crucial BX500 SSD drive.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
master
Daniel González Cabanelas 2020-06-28 23:52:10 +02:00 committed by Hauke Mehrtens
parent 68d9cb8214
commit a902e6a657
2 changed files with 67 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
View File

@ -11,6 +11,7 @@
#include "mvebu-linkstation-fan.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/thermal/thermal.h>
/ {
model = "Buffalo LinkStation LS421DE";
@ -40,10 +41,60 @@
MBUS_ID(0x09, 0x01) 0 0xf1100000 0x10000>;
};
gpio_fan {
system_fan: gpio_fan {
gpios = <&gpio0 13 GPIO_ACTIVE_HIGH
&gpio0 14 GPIO_ACTIVE_HIGH>;
alarm-gpios = <&gpio0 10 GPIO_ACTIVE_HIGH>;
#cooling-cells = <2>;
};
thermal-zones {
chassis-thermal {
polling-delay = <20000>;
polling-delay-passive = <2000>;
thermal-sensors = <&hdd0_temp>, <&hdd1_temp>;
coefficients = <1 1>;
trips {
chassis_alert1: chassis-alert1 {
temperature = <36000>;
hysteresis = <2000>;
type = "active";
};
chassis_alert2: chassis-alert2 {
temperature = <46000>;
hysteresis = <2000>;
type = "active";
};
chassis_alert3: chassis-alert3 {
temperature = <56000>;
hysteresis = <2000>;
type = "passive";
};
chassis_crit: chassis-crit {
temperature = <66000>;
hysteresis = <2000>;
type = "critical";
};
};
cooling-maps {
map1 {
trip = <&chassis_alert1>;
cooling-device = <&system_fan THERMAL_NO_LIMIT 1>;
};
map2 {
trip = <&chassis_alert2>;
cooling-device = <&system_fan 2 2>;
};
map3 {
trip = <&chassis_alert3>;
cooling-device = <&system_fan 3 THERMAL_NO_LIMIT>;
};
};
};
};
gpio_keys {
@ -225,6 +276,18 @@
&sata {
nr-ports = <2>;
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
hdd0_temp: sata-port@0 {
reg = <0>;
#thermal-sensor-cells = <0>;
};
hdd1_temp: sata-port@1 {
reg = <1>;
#thermal-sensor-cells = <0>;
};
};
&sdio {

5
target/linux/mvebu/image/cortexa9.mk
View File

@ -17,8 +17,9 @@ define Device/buffalo_ls421de
KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
DEVICE_DTS := armada-370-buffalo-ls421de
DEVICE_PACKAGES := \
kmod-rtc-rs5c372a kmod-hwmon-gpiofan kmod-usb3 kmod-md-raid0 \
kmod-md-raid1 kmod-md-mod kmod-fs-xfs mkf2fs e2fsprogs partx-utils
kmod-rtc-rs5c372a kmod-hwmon-gpiofan kmod-hwmon-drivetemp kmod-usb3 \
kmod-md-raid0 kmod-md-raid1 kmod-md-mod kmod-fs-xfs mkf2fs e2fsprogs \
partx-utils
endef
TARGET_DEVICES += buffalo_ls421de