openwrt/target/linux/bcm27xx/patches-5.10/950-0629-overlays-ghost-amp-Change-early-disable-sequence.patch

From c6ae428b0fa43bee35aa6de4fb2f5d5cc81460a4 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Mon, 14 Jun 2021 15:07:38 +0100
Subject: [PATCH] overlays: ghost-amp: Change early-disable sequence

In the event that the ENABLE signal from the codec goes low before
RELAY2 has been enabled, wait until the full 1000ms has elapsed then
enable RELAY2 and jump to amp_on_wait, i.e. as if output had been
fully enabled then disabled, rather than returning to the amp_off
idle state.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 arch/arm/boot/dts/overlays/ghost-amp-overlay.dts | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

--- a/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
+++ b/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
@@ -82,14 +82,20 @@
 
 				amp_on_1 {
 					set = <RELAY1 1>;
-					amp_on = <GF_DELAY 1000>;
-					amp_off = <ENABLE 0>;
+					amp_on_2 = <GF_DELAY 1000>;
+					amp_off = <GF_SHUTDOWN 0>;
+					fault = <FAULT 1>;
+				};
+
+				amp_on_2 {
+					set = <RELAY2 1>;
+					amp_on_wait = <ENABLE 0>;
+					amp_on = <GF_DELAY 1>;
 					fault = <FAULT 1>;
 				};
 
 				amp_on {
-					set = <RELAY2 1>,
-					      <RELAYSSR 1>;
+					set = <RELAYSSR 1>;
 					amp_on_wait = <ENABLE 0>;
 					fault = <FAULT 1>;
 				};