ARM: highbank: handle soft poweroff and reset key events

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@calxeda.com>
Cc: stable@vger.kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index b3d7e5634b83cb02ce568040099027007820a45b..bd3bf66ce3449a31c9c7c9f56be6b4225ee9cbf9 100644 (file)
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -17,12 +17,15 @@
 #include <linux/clkdev.h>
 #include <linux/clocksource.h>
 #include <linux/dma-mapping.h>
+#include <linux/input.h>
 #include <linux/io.h>
 #include <linux/irqchip.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/reboot.h>
 #include <linux/amba/bus.h>
 #include <linux/platform_device.h>
 
@@ -130,6 +133,24 @@ static struct platform_device highbank_cpuidle_device = {
        .name = "cpuidle-calxeda",
 };
 
+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)
 {
        struct device_node *np;
@@ -145,6 +166,8 @@ 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);
 
        if (psci_ops.cpu_suspend)