[PATCH] ARM: highbank: add soft power and reset key event handling
From: Rob Herring <hidden>
Date: 2013-12-03 18:58:23
Subsystem:
arm port, arm/calxeda highbank architecture, the rest · Maintainers:
Russell King, Andre Przywara, Linus Torvalds
From: Rob Herring <redacted> Power and reset keys come from management processor via ipc messages. Passing them to userspace does not work in a non-desktop environment as acpid is used in that case. So we handle the keys directly. Signed-off-by: Rob Herring <redacted> --- Olof, Kevin, This is something that has been in some distro kernels for some time and fell thru the cracks to upstream being dependent on pl320 driver. I would like this to be tagged for stable, so it gets picked up by distros where it has been inadvertently dropped. Rob 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 b3d7e56..bd3bf66 100644
--- 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)
--
1.8.3.2