brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/dedeckeh.git] / target / linux / brcm2708 / patches-4.19 / 950-0062-gpio-poweroff-Allow-it-to-work-on-Raspberry-Pi.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0062-gpio-poweroff-Allow-it-to-work-on-Raspberry-Pi.patch b/target/linux/brcm2708/patches-4.19/950-0062-gpio-poweroff-Allow-it-to-work-on-Raspberry-Pi.patch
new file mode 100644 (file)
index 0000000..0278156
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0062-gpio-poweroff-Allow-it-to-work-on-Raspberry-Pi.patch
@@ -0,0 +1,35 @@
+From 84cd61bdf5fe5ecf70ad88e60e07879cbde2d4a6 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
+@@ -51,9 +51,11 @@ 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",
+                      __func__);