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