mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-03-09 15:40:20 +00:00
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From b78671674d5205d43d4338d67a3541affb0acd11 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Thu, 25 Jun 2015 12:16:11 +0100
|
|
Subject: [PATCH] gpio-poweroff: Allow it to work on Raspberry Pi
|
|
|
|
The Raspberry Pi firmware manages the power-down and reboot
|
|
process. To do this it installs a pm_power_off handler, causing
|
|
the gpio-poweroff module to abort the probe function.
|
|
|
|
This patch introduces a "force" DT property that overrides that
|
|
behaviour, and also adds a DT overlay to enable and control it.
|
|
|
|
Note that running in an active-low configuration (DT parameter
|
|
"active_low") requires a custom dt-blob.bin and probably won't
|
|
allow a reboot without switching off, so an external inversion
|
|
of the trigger signal may be preferable.
|
|
---
|
|
drivers/power/reset/gpio-poweroff.c | 4 +++-
|
|
1 file changed, 3 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/power/reset/gpio-poweroff.c
|
|
+++ b/drivers/power/reset/gpio-poweroff.c
|
|
@@ -50,9 +50,11 @@ static int gpio_poweroff_probe(struct pl
|
|
{
|
|
bool input = false;
|
|
enum gpiod_flags flags;
|
|
+ bool force = false;
|
|
|
|
/* If a pm_power_off function has already been added, leave it alone */
|
|
- if (pm_power_off != NULL) {
|
|
+ force = of_property_read_bool(pdev->dev.of_node, "force");
|
|
+ if (!force && (pm_power_off != NULL)) {
|
|
dev_err(&pdev->dev,
|
|
"%s: pm_power_off function already registered\n",
|
|
__func__);
|