mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
From ae78ddade19993b7ab0dee76137510a996c3765c Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Tue, 27 Apr 2021 08:59:01 +0100
|
|
Subject: [PATCH] gpio-poweroff: Remember the old poweroff handler
|
|
|
|
Keeping a copy of the old poweroff handler allows it to be restored
|
|
should this module be unloaded, but also provides a fallback if the
|
|
power hasn't been removed when the timeout elapses.
|
|
|
|
See: https://github.com/raspberrypi/rpi-eeprom/issues/330
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/power/reset/gpio-poweroff.c | 7 ++++++-
|
|
1 file changed, 6 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/power/reset/gpio-poweroff.c
|
|
+++ b/drivers/power/reset/gpio-poweroff.c
|
|
@@ -24,6 +24,7 @@ static struct gpio_desc *reset_gpio;
|
|
static u32 timeout = DEFAULT_TIMEOUT_MS;
|
|
static u32 active_delay = 100;
|
|
static u32 inactive_delay = 100;
|
|
+static void (*old_power_off)(void);
|
|
|
|
static void gpio_poweroff_do_poweroff(void)
|
|
{
|
|
@@ -43,6 +44,9 @@ static void gpio_poweroff_do_poweroff(vo
|
|
/* give it some time */
|
|
mdelay(timeout);
|
|
|
|
+ if (old_power_off)
|
|
+ old_power_off();
|
|
+
|
|
WARN_ON(1);
|
|
}
|
|
|
|
@@ -83,6 +87,7 @@ static int gpio_poweroff_probe(struct pl
|
|
gpiod_export_link(&pdev->dev, "poweroff-gpio", reset_gpio);
|
|
}
|
|
|
|
+ old_power_off = pm_power_off;
|
|
pm_power_off = &gpio_poweroff_do_poweroff;
|
|
return 0;
|
|
}
|
|
@@ -90,7 +95,7 @@ static int gpio_poweroff_probe(struct pl
|
|
static int gpio_poweroff_remove(struct platform_device *pdev)
|
|
{
|
|
if (pm_power_off == &gpio_poweroff_do_poweroff)
|
|
- pm_power_off = NULL;
|
|
+ pm_power_off = old_power_off;
|
|
|
|
gpiod_unexport(reset_gpio);
|
|
|