git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From 7b4fcaaaf4d7081c4c1be24b4961f59e14e2af6c Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Tue, 5 Apr 2016 19:40:12 +0100
   4 Subject: [PATCH 0074/1085] reboot: Use power off rather than busy spinning
   5  when halt is requested
   6
   7 reboot: Use power off rather than busy spinning when halt is requested
   8
   9 Busy spinning after halt is dumb
  10 We've previously applied this patch to arch/arm
  11 but it is currenltly missing in arch/arm64
  12
  13 Pi4 after "sudo halt" uses 520mA
  14 Pi4 after "sudo shutdown now" uses 310mA
  15
  16 Make them both use the lower powered option
  17
  18 Signed-off-by: Dom Cobley <popcornmix@gmail.com>
  19 ---
  20  arch/arm/kernel/reboot.c    | 4 +---
  21  arch/arm64/kernel/process.c | 4 +---
  22  2 files changed, 2 insertions(+), 6 deletions(-)
  23
  24 --- a/arch/arm/kernel/reboot.c
  25 +++ b/arch/arm/kernel/reboot.c
  26 @@ -102,9 +102,7 @@ void machine_shutdown(void)
  27   */
  28  void machine_halt(void)
  29  {
  30 -       local_irq_disable();
  31 -       smp_send_stop();
  32 -       while (1);
  33 +       machine_power_off();
  34  }
  35
  36  /*
  37 --- a/arch/arm64/kernel/process.c
  38 +++ b/arch/arm64/kernel/process.c
  39 @@ -96,9 +96,7 @@ void machine_shutdown(void)
  40   */
  41  void machine_halt(void)
  42  {
  43 -       local_irq_disable();
  44 -       smp_send_stop();
  45 -       while (1);
  46 +       machine_power_off();
  47  }
  48
  49  /*