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

   1 From c6ae428b0fa43bee35aa6de4fb2f5d5cc81460a4 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Mon, 14 Jun 2021 15:07:38 +0100
   4 Subject: [PATCH] overlays: ghost-amp: Change early-disable sequence
   5
   6 In the event that the ENABLE signal from the codec goes low before
   7 RELAY2 has been enabled, wait until the full 1000ms has elapsed then
   8 enable RELAY2 and jump to amp_on_wait, i.e. as if output had been
   9 fully enabled then disabled, rather than returning to the amp_off
  10 idle state.
  11
  12 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  13 ---
  14  arch/arm/boot/dts/overlays/ghost-amp-overlay.dts | 14 ++++++++++----
  15  1 file changed, 10 insertions(+), 4 deletions(-)
  16
  17 --- a/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
  18 +++ b/arch/arm/boot/dts/overlays/ghost-amp-overlay.dts
  19 @@ -82,14 +82,20 @@
  20
  21                                 amp_on_1 {
  22                                         set = <RELAY1 1>;
  23 -                                       amp_on = <GF_DELAY 1000>;
  24 -                                       amp_off = <ENABLE 0>;
  25 +                                       amp_on_2 = <GF_DELAY 1000>;
  26 +                                       amp_off = <GF_SHUTDOWN 0>;
  27 +                                       fault = <FAULT 1>;
  28 +                               };
  29 +
  30 +                               amp_on_2 {
  31 +                                       set = <RELAY2 1>;
  32 +                                       amp_on_wait = <ENABLE 0>;
  33 +                                       amp_on = <GF_DELAY 1>;
  34                                         fault = <FAULT 1>;
  35                                 };
  36
  37                                 amp_on {
  38 -                                       set = <RELAY2 1>,
  39 -                                             <RELAYSSR 1>;
  40 +                                       set = <RELAYSSR 1>;
  41                                         amp_on_wait = <ENABLE 0>;
  42                                         fault = <FAULT 1>;
  43                                 };