diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0893-dtoverlays-Add-i2c-fan-overlay.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0893-dtoverlays-Add-i2c-fan-overlay.patch | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0893-dtoverlays-Add-i2c-fan-overlay.patch b/target/linux/bcm27xx/patches-5.15/950-0893-dtoverlays-Add-i2c-fan-overlay.patch new file mode 100644 index 0000000000..6687eacef5 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0893-dtoverlays-Add-i2c-fan-overlay.patch @@ -0,0 +1,165 @@ +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>; ++ }; ++}; |