164 lines
3.8 KiB
Diff
164 lines
3.8 KiB
Diff
From 96f25d50e2352922e16ae74bb16fd8b6985f0f66 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 30 Sep 2020 12:17:48 +0100
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Subject: [PATCH] overlays: Add ghost-amp overlay
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Add an overlay for the Ghost amplifier.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 7 ++
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.../boot/dts/overlays/ghost-amp-overlay.dts | 119 ++++++++++++++++++
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3 files changed, 127 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -45,6 +45,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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exc3000.dtbo \
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fe-pi-audio.dtbo \
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fsm-demo.dtbo \
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+ ghost-amp.dtbo \
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goodix.dtbo \
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googlevoicehat-soundcard.dtbo \
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gpio-fan.dtbo \
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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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@@ -775,6 +775,13 @@ Load: dtoverlay=fsm-demo,<param>=<val>
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Params: fsm_debug Enable debug logging (default off)
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+Name: ghost-amp
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+Info: An overlay for the Ghost amplifier.
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+Load: dtoverlay=ghost-amp,<param>=<val>
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+Params: fsm_debug Enable debug logging of the GPIO FSM (default
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+ off)
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+
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+
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Name: goodix
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Info: Enables I2C connected Goodix gt9271 multiple touch controller using
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GPIOs 4 and 17 (pins 7 and 11 on GPIO header) for interrupt and reset.
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
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@@ -0,0 +1,119 @@
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+// Overlay for the PCM5122-based Ghost amplifier using gpio-fsm
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/gpio/gpio-fsm.h>
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+
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+#define ENABLE GF_SW(0)
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+#define FAULT GF_IP(0) // GPIO5
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+#define RELAY1 GF_OP(0) // GPIO22
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+#define RELAY2 GF_OP(1) // GPIO23
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+
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+/ {
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ target = <&i2s>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&i2c1>;
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+ __overlay__ {
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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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+ pcm5122@4c {
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+ #sound-dai-cells = <0>;
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+ compatible = "ti,pcm5122";
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+ reg = <0x4c>;
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+ AVDD-supply = <&vdd_3v3_reg>;
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+ DVDD-supply = <&vdd_3v3_reg>;
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+ CPVDD-supply = <&vdd_3v3_reg>;
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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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+ fragment@2 {
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+ target = <&sound>;
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+ iqaudio_dac: __overlay__ {
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+ compatible = "iqaudio,iqaudio-dac";
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+ i2s-controller = <&i2s>;
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+ mute-gpios = <& 0 0>;
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+ iqaudio-dac,auto-mute-amp;
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target-path = "/";
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+ __overlay__ {
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+ amp: ghost-amp {
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+ compatible = "rpi,gpio-fsm";
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+
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+ debug = <0>;
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+ gpio-controller;
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+ #gpio-cells = <2>;
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+ num-soft-gpios = <1>;
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+ gpio-line-names = "enable";
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+ input-gpios = <&gpio 5 1>; // FAULT (active low)
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+ output-gpios = <&gpio 22 0>, // RELAY1
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+ <&gpio 23 0>; // RELAY2
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+ shutdown-timeout-ms = <1000>;
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+
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+ amp_off {
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+ start_state;
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+ shutdown_state;
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+
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+ set = <RELAY2 0>,
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+ <RELAY1 0>;
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+ amp_on_1 = <ENABLE 1>;
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+ fault = <FAULT 1>;
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+ };
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+
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+ amp_on_1 {
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+ set = <RELAY1 1>;
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+ amp_on = <GF_DELAY 1500>;
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+ amp_off = <ENABLE 0>;
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+ fault = <FAULT 1>;
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+ };
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+
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+ amp_on {
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+ set = <RELAY2 1>;
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+ amp_off_wait = <ENABLE 0>;
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+ fault = <FAULT 1>;
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+ };
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+
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+ amp_off_wait {
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+ amp_off_1 = <GF_DELAY (30*60*1000)>,
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+ <GF_SHUTDOWN 0>;
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+ amp_on = <ENABLE 1>;
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+ fault = <FAULT 1>;
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+ };
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+
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+ amp_off_1 {
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+ set = <RELAY2 0>;
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+ amp_on = <ENABLE 1>;
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+ amp_off = <GF_DELAY 100>;
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+ fault = <FAULT 1>;
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+ };
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+
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+ // Keep this a distinct state to prevent
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+ // changes and for the diagnostic output
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+ fault {
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+ set = <RELAY2 0>,
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+ <RELAY1 0>;
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+ shutdown_state;
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+ };
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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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+ fsm_debug = <&>,"debug:0";
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+ };
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+};
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