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From 7d4346817f31105ed07dd4e3e9fd2294c85a5fee Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 19 Jan 2022 17:29:13 +0000
Subject: [PATCH] dtoverlays: Add option for PoE HAT to use Linux I2C
instead of FW.
Adds parameter "i2c" to use the PoE HAT I2C MFD driver to instantiate
the PoE HAT drivers, instead of being off the firmware.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
arch/arm/boot/dts/overlays/README | 4 ++
.../arm/boot/dts/overlays/rpi-poe-overlay.dts | 62 +++++++++++++++----
.../dts/overlays/rpi-poe-plus-overlay.dts | 15 +++++
3 files changed, 69 insertions(+), 12 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2858,6 +2858,8 @@ Params: poe_fan_temp0 Temperat
speeds up (default 55000)
poe_fan_temp3_hyst Temperature delta (in millicelcius) at which
the fan slows down (default 5000)
+ i2c Control the fan via Linux I2C drivers instead of
+ the firmware.
Name: rpi-poe-plus
@@ -2879,6 +2881,8 @@ Params: poe_fan_temp0 Temperat
speeds up (default 55000)
poe_fan_temp3_hyst Temperature delta (in millicelcius) at which
the fan slows down (default 5000)
+ i2c Control the fan via Linux I2C drivers instead of
+ the firmware.
Name: rpi-proto
--- a/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
+++ b/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
@@ -8,16 +8,6 @@
compatible = "brcm,bcm2835";
fragment@0 {
- target = <&firmware>;
- __overlay__ {
- fwpwm: pwm {
- compatible = "raspberrypi,firmware-poe-pwm";
- #pwm-cells = <2>;
- };
- };
- };
-
- fragment@1 {
target-path = "/";
__overlay__ {
fan: pwm-fan {
@@ -29,7 +19,7 @@
};
};
- fragment@2 {
+ fragment@1 {
target = <&cpu_thermal>;
__overlay__ {
trips {
@@ -75,7 +65,7 @@
};
};
- fragment@3 {
+ fragment@2 {
target-path = "/__overrides__";
__overlay__ {
poe_fan_temp0 = <&trip0>,"temperature:0";
@@ -89,6 +79,52 @@
};
};
+ fragment@3 {
+ target = <&firmware>;
+ __overlay__ {
+ fwpwm: pwm {
+ compatible = "raspberrypi,firmware-poe-pwm";
+ #pwm-cells = <2>;
+ };
+ };
+ };
+
+ fragment@4 {
+ target = <&i2c0>;
+ __dormant__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ poe_mfd: poe@51 {
+ compatible = "raspberrypi,poe-core";
+ reg = <0x51>;
+ status = "okay";
+
+ poe_mfd_pwm: poe_pwm@f0 {
+ compatible = "raspberrypi,poe-pwm";
+ reg = <0xf0>;
+ status = "okay";
+ #pwm-cells = <2>;
+ };
+ };
+ };
+ };
+
+ fragment@5 {
+ target = <&i2c0if>;
+ __dormant__ {
+ status = "okay";
+ };
+ };
+
+ fragment@6 {
+ target = <&i2c0mux>;
+ __dormant__ {
+ status = "okay";
+ };
+ };
+
__overrides__ {
poe_fan_temp0 = <&trip0>,"temperature:0";
poe_fan_temp0_hyst = <&trip0>,"hysteresis:0";
@@ -98,5 +134,7 @@
poe_fan_temp2_hyst = <&trip2>,"hysteresis:0";
poe_fan_temp3 = <&trip3>,"temperature:0";
poe_fan_temp3_hyst = <&trip3>,"hysteresis:0";
+ i2c = <0>, "-3+4+5+6",
+ <&fan>,"pwms:0=",<&poe_mfd_pwm>;
};
};
--- a/arch/arm/boot/dts/overlays/rpi-poe-plus-overlay.dts
+++ b/arch/arm/boot/dts/overlays/rpi-poe-plus-overlay.dts
@@ -16,6 +16,21 @@
};
};
};
+ fragment@11 {
+ target = <&poe_mfd>;
+ __dormant__ {
+ rpi-poe-power-supply@f2 {
+ compatible = "raspberrypi,rpi-poe-power-supply";
+ reg = <0xf2>;
+ status = "okay";
+ };
+ };
+ };
+
+ __overrides__ {
+ i2c = <0>, "-3+4+5+6-10+11",
+ <&fan>,"pwms:0=",<&poe_mfd_pwm>;
+ };
};
&fan {
|
