brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/dedeckeh.git] / target / linux / brcm2708 / patches-4.19 / 950-0149-BCM270X_DT-Add-gpio-fan-overlay.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0149-BCM270X_DT-Add-gpio-fan-overlay.patch b/target/linux/brcm2708/patches-4.19/950-0149-BCM270X_DT-Add-gpio-fan-overlay.patch
new file mode 100644 (file)
index 0000000..f252490
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0149-BCM270X_DT-Add-gpio-fan-overlay.patch
@@ -0,0 +1,114 @@
+From 9762b3a015886c42941f535e688ffac1f56e35aa Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 18 Sep 2018 11:08:07 +0100
+Subject: [PATCH] BCM270X_DT: Add gpio-fan overlay
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             |  8 +++
+ .../boot/dts/overlays/gpio-fan-overlay.dts    | 71 +++++++++++++++++++
+ 3 files changed, 80 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/gpio-fan-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -33,6 +33,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+       fe-pi-audio.dtbo \
+       goodix.dtbo \
+       googlevoicehat-soundcard.dtbo \
++      gpio-fan.dtbo \
+       gpio-ir.dtbo \
+       gpio-ir-tx.dtbo \
+       gpio-key.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -541,6 +541,14 @@ Load:   dtoverlay=googlevoicehat-soundca
+ Params: <None>
+ 
+ 
++Name:   gpio-fan
++Info:   Configure a GPIO pin to control a cooling fan.
++Load:   dtoverlay=gpio-fan,<param>=<val>
++Params: gpiopin                 GPIO used to control the fan (default 12)
++        temp                    Temperature at which the fan switches on, in
++                                millicelcius (default 55000)
++
++
+ Name:   gpio-ir
+ Info:   Use GPIO pin as rc-core style infrared receiver input. The rc-core-
+         based gpio_ir_recv driver maps received keys directly to a
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/gpio-fan-overlay.dts
+@@ -0,0 +1,71 @@
++/*
++ * Overlay for the Raspberry Pi GPIO Fan @ BCM GPIO12.
++ * Optional parameters:
++ *    - "gpiopin"     - default GPIO12
++ *    - "temp"        - default 55000
++ * Requires:
++ *    - kernel configurations: CONFIG_SENSORS_GPIO_FAN=m and CONFIG_SENSORS_PWM_FAN=m;
++ *    - kernel rebuid;
++ *    - DC Fan connected to GPIO via a N-MOSFET (2N7002)
++ *
++ *                   ┌─────────────────────┐
++ *                   │Fan negative terminal│
++ *                   └┬────────────────────┘
++ *                    │
++ *                 │──┘
++ * [GPIO12]──────┤ │<─┐  2N7002
++ *                 │──┤
++ *                    │
++ *                   ─┴─
++ *                   GND
++ *
++ * sudo dtc -W no-unit_address_vs_reg -@ -I dts -O dtb -o /boot/overlays/gpio-fan.dtbo gpio-fan.dts
++ * sudo nano /boot/config.txt add "dtoverlay=gpio-fan" or "dtoverlay=gpio-fan,gpiopin=12,temp=45000"
++ * or
++ * sudo sh -c "echo '\n# Enable PI GPIO-Fan\ndtoverlay=gpio-fan\n' >> /boot/config.txt"
++ * sudo sh -c "echo '\n# Enable PI GPIO-Fan\ndtoverlay=gpio-fan,gpiopin=12\n' >> /boot/config.txt"
++ *
++ */
++/dts-v1/;
++/plugin/;
++
++/ {
++      compatible = "brcm,bcm2708";
++
++      fragment@0 {
++              target-path = "/";
++              __overlay__ {
++                      fan0: gpio-fan@0 {
++                              compatible = "gpio-fan";
++                              gpios = <&gpio 12 1>;
++                              gpio-fan,speed-map = <0    0>,
++                                                                       <5000 1>;
++                              #cooling-cells = <2>;
++                      };
++              };
++      };
++
++      fragment@1 {
++              target = <&cpu_thermal>;
++              polling-delay = <2000>; /* milliseconds */
++              __overlay__ {
++                      trips {
++                              cpu_hot: trip-point@0 {
++                                      temperature = <55000>;  /* (millicelsius) Fan started at 55°C */
++                                      hysteresis = <5000>;    /* (millicelsius) Fan stopped at 50°C */
++                                      type = "active";
++                              };
++                      };
++                      cooling-maps {
++                              map0 {
++                                      trip = <&cpu_hot>;
++                                      cooling-device = <&fan0 1 1>;
++                              };
++                      };
++              };
++      };
++      __overrides__ {
++              gpiopin = <&fan0>,"gpios:4", <&fan0>,"brcm,pins:0";
++              temp = <&cpu_hot>,"temperature:0";
++      };
++};