[3.11.y.z extended stable] Patch "ARM: highbank: handle soft poweroff and reset key events" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ARM: highbank: handle soft poweroff and reset key events

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 7007385035a9ca83e880a8debbaeb04bd1b6bb27 Mon Sep 17 00:00:00 2001
From: Rob Herring <rob.herring at calxeda.com>
Date: Wed, 4 Dec 2013 11:05:17 -0600
Subject: ARM: highbank: handle soft poweroff and reset key events

commit 3843114856728075d0a80e7151197c19fb3a9e08 upstream.

Graceful reboot and poweroff via IPMI commands to the management
processor don't work. Power and reset keys are events from the
management processor which are generated via IPC messages. Passing
the keys to userspace does not work as neither acpid nor a desktop
environment are present.

This adds a notifier handler for the IPC messages so the kernel can
handle the key events directly and IPMI graceful shutdown will work.

Signed-off-by: Rob Herring <rob.herring at calxeda.com>
Signed-off-by: Olof Johansson <olof at lixom.net>
[ luis: backported to 3.11: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 arch/arm/mach-highbank/highbank.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index 8881579..d247cf2 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -17,15 +17,18 @@
 #include <linux/clkdev.h>
 #include <linux/clocksource.h>
 #include <linux/dma-mapping.h>
+#include <linux/input.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/irqdomain.h>
+#include <linux/mailbox.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
 #include <linux/smp.h>
+#include <linux/reboot.h>
 #include <linux/amba/bus.h>
 #include <linux/clk-provider.h>

@@ -158,6 +161,24 @@ static struct notifier_block highbank_platform_nb = {
 	.notifier_call = highbank_platform_notifier,
 };

+static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
+{
+	u32 key = *(u32 *)data;
+
+	if (event != 0x1000)
+		return 0;
+
+	if (key == KEY_POWER)
+		orderly_poweroff(false);
+	else if (key == 0xffff)
+		ctrl_alt_del();
+
+	return 0;
+}
+static struct notifier_block hb_keys_nb = {
+	.notifier_call = hb_keys_notifier,
+};
+
 static void __init highbank_init(void)
 {
 	pm_power_off = highbank_power_off;
@@ -166,6 +187,8 @@ static void __init highbank_init(void)
 	bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
 	bus_register_notifier(&amba_bustype, &highbank_amba_nb);

+	pl320_ipc_register_notifier(&hb_keys_nb);
+
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }

--
1.8.3.2