[x86] update alix2 platform driver

Add support for Ed Wildgoose's alix platform driver plus my
enhancement to add GPIO soft button support.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28081 3c298f89-4303-0410-b956-a3cf2f4a3e73

6 files changed, 650 insertions, 1 deletions

diff --git a/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch b/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch
new file mode 100644
index 000000000..b6feacf84
--- /dev/null
+++ b/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch
@@ -0,0 +1,502 @@
+From: Ed Wildgoose <git@wildgooses.com>
+Date: Wed, 3 Aug 2011 00:52:36 +0000 (+1000)
+Subject: This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
+X-Git-Tag: next-20110812~1^2~75
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fnext%2Flinux-next.git;a=commitdiff_plain;h=2cd7b3e8f8078c214c93a2c60cb845500c92df4a;hp=dc849eae35bbf651ab3ee459f5683e1ff780413d
+
+This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
+driver that controls the LEDs through the leds-gpio driver.  The old
+driver accessed GPIOs directly, which created a conflict and prevented
+also loading the cs5535-gpio driver to read other GPIOs on the Alix board.
+ With this new driver, we hook into leds-gpio which in turn uses GPIO to
+control the LEDs and therefore it's possible to control both the LEDs and
+access onboard GPIOs
+
+Driver is moved to platform/geode and any other geode initialisation
+modules should move here also.
+
+This driver is inspired by leds-net5501.c by Alessandro Zummo.
+
+Ideally, leds-net5501.c should also be moved to platform/geode.
+Additionally the driver relies on parts of the patch: 7f131cf3ed ("leds:
+leds-alix2c - take port address from MSR) by Daniel Mack to perform
+detection of the Alix board.
+
+Signed-off-by: Ed Wildgoose <kernel@wildgooses.com>
+Cc: Alessandro Zummo <a.zummo@towertech.it>
+Cc: Daniel Mack <daniel@caiaq.de>
+Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
+Cc: Ingo Molnar <mingo@elte.hu>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Cc: "H. Peter Anvin" <hpa@zytor.com>
+Cc: Richard Purdie <rpurdie@rpsys.net>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+---
+
+diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
+index f1833e3..d18e7a2 100644
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -2073,6 +2073,20 @@ config OLPC_XO15_SCI
+ 	   - AC adapter status updates
+ 	   - Battery status updates
+ 
++config ALIX
++	bool "PCEngines ALIX System Support (LED setup)"
++	select GPIOLIB
++	---help---
++	  This option enables system support for the PCEngines ALIX.
++	  At present this just sets up LEDs for GPIO control on
++	  ALIX2/3/6 boards.  However, other system specific setup should
++	  get added here.
++
++	  Note: You must still enable the drivers for GPIO and LED support
++	  (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
++
++	  Note: You have to set alix.force=1 for boards with Award BIOS.
++
+ endif # X86_32
+ 
+ config AMD_NB
+diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
+index 021eee9..8d87439 100644
+--- a/arch/x86/platform/Makefile
++++ b/arch/x86/platform/Makefile
+@@ -1,6 +1,7 @@
+ # Platform specific code goes here
+ obj-y	+= ce4100/
+ obj-y	+= efi/
++obj-y	+= geode/
+ obj-y	+= iris/
+ obj-y	+= mrst/
+ obj-y	+= olpc/
+diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile
+new file mode 100644
+index 0000000..07c9cd0
+--- /dev/null
++++ b/arch/x86/platform/geode/Makefile
+@@ -0,0 +1 @@
++obj-$(CONFIG_ALIX)		+= alix.o
+diff --git a/arch/x86/platform/geode/alix.c b/arch/x86/platform/geode/alix.c
+new file mode 100644
+index 0000000..f3f01e2
+--- /dev/null
++++ b/arch/x86/platform/geode/alix.c
+@@ -0,0 +1,141 @@
++/*
++ * System Specific setup for PCEngines ALIX.
++ * At the moment this means setup of GPIO control of LEDs
++ * on Alix.2/3/6 boards.
++ *
++ *
++ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
++ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
++ *
++ * TODO: There are large similarities with leds-net5501.c
++ * by Alessandro Zummo <a.zummo@towertech.it>
++ * In the future leds-net5501.c should be migrated over to platform
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/string.h>
++#include <linux/leds.h>
++#include <linux/platform_device.h>
++#include <linux/gpio.h>
++
++#include <asm/geode.h>
++
++static int force = 0;
++module_param(force, bool, 0444);
++/* FIXME: Award bios is not automatically detected as Alix platform */
++MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
++
++static struct gpio_led alix_leds[] = {
++	{
++		.name = "alix:1",
++		.gpio = 6,
++		.default_trigger = "default-on",
++		.active_low = 1,
++	},
++	{
++		.name = "alix:2",
++		.gpio = 25,
++		.default_trigger = "default-off",
++		.active_low = 1,
++	},
++	{
++		.name = "alix:3",
++		.gpio = 27,
++		.default_trigger = "default-off",
++		.active_low = 1,
++	},
++};
++
++static struct gpio_led_platform_data alix_leds_data = {
++	.num_leds = ARRAY_SIZE(alix_leds),
++	.leds = alix_leds,
++};
++
++static struct platform_device alix_leds_dev = {
++	.name = "leds-gpio",
++	.id = -1,
++	.dev.platform_data = &alix_leds_data,
++};
++
++static void __init register_alix(void)
++{
++	/* Setup LED control through leds-gpio driver */
++	platform_device_register(&alix_leds_dev);
++}
++
++static int __init alix_present(unsigned long bios_phys,
++				const char *alix_sig,
++				size_t alix_sig_len)
++{
++	const size_t bios_len = 0x00010000;
++	const char *bios_virt;
++	const char *scan_end;
++	const char *p;
++	char name[64];
++
++	if (force) {
++		printk(KERN_NOTICE "%s: forced to skip BIOS test, "
++		       "assume system is ALIX.2/ALIX.3\n",
++		       KBUILD_MODNAME);
++		return 1;
++	}
++
++	bios_virt = phys_to_virt(bios_phys);
++	scan_end = bios_virt + bios_len - (alix_sig_len + 2);
++	for (p = bios_virt; p < scan_end; p++) {
++		const char *tail;
++		char *a;
++
++		if (memcmp(p, alix_sig, alix_sig_len) != 0)
++			continue;
++
++		memcpy(name, p, sizeof(name));
++
++		/* remove the first \0 character from string */
++		a = strchr(name, '\0');
++		if (a)
++			*a = ' ';
++
++		/* cut the string at a newline */
++		a = strchr(name, '\r');
++		if (a)
++			*a = '\0';
++
++		tail = p + alix_sig_len;
++		if ((tail[0] == '2' || tail[0] == '3')) {
++			printk(KERN_INFO
++			       "%s: system is recognized as \"%s\"\n",
++			       KBUILD_MODNAME, name);
++			return 1;
++		}
++	}
++
++	return 0;
++}
++
++static int __init alix_init(void)
++{
++	const char tinybios_sig[] = "PC Engines ALIX.";
++	const char coreboot_sig[] = "PC Engines\0ALIX.";
++
++	if (!is_geode())
++		return 0;
++
++	if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
++	    alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
++		register_alix();
++
++	return 0;
++}
++
++module_init(alix_init);
++
++MODULE_AUTHOR("Ed Wildgoose <kernel@wildgooses.com>");
++MODULE_DESCRIPTION("PCEngines ALIX System Setup");
++MODULE_LICENSE("GPL");
+diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
+index b591e72..8974d27 100644
+--- a/drivers/leds/Kconfig
++++ b/drivers/leds/Kconfig
+@@ -107,14 +107,6 @@
+ 	help
+ 	  This option enables support for the PCEngines WRAP programmable LEDs.
+ 
+-config LEDS_ALIX2
+-	tristate "LED Support for ALIX.2 and ALIX.3 series"
+-	depends on LEDS_CLASS
+-	depends on X86 && !GPIO_CS5535 && !CS5535_GPIO
+-	help
+-	  This option enables support for the PCEngines ALIX.2 and ALIX.3 LEDs.
+-	  You have to set leds-alix2.force=1 for boards with Award BIOS.
+-
+ config LEDS_H1940
+ 	tristate "LED Support for iPAQ H1940 device"
+ 	depends on LEDS_CLASS
+diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
+index bbfd2e3..a0a1b89 100644
+--- a/drivers/leds/Makefile
++++ b/drivers/leds/Makefile
+@@ -16,7 +16,6 @@ obj-$(CONFIG_LEDS_AMS_DELTA)		+= leds-ams-delta.o
+ obj-$(CONFIG_LEDS_NET48XX)		+= leds-net48xx.o
+ obj-$(CONFIG_LEDS_NET5501)		+= leds-net5501.o
+ obj-$(CONFIG_LEDS_WRAP)			+= leds-wrap.o
+-obj-$(CONFIG_LEDS_ALIX2)		+= leds-alix2.o
+ obj-$(CONFIG_LEDS_H1940)		+= leds-h1940.o
+ obj-$(CONFIG_LEDS_COBALT_QUBE)		+= leds-cobalt-qube.o
+ obj-$(CONFIG_LEDS_COBALT_RAQ)		+= leds-cobalt-raq.o
+diff --git a/drivers/leds/leds-alix2.c b/drivers/leds/leds-alix2.c
+deleted file mode 100644
+index f59ffad..0000000
+--- a/drivers/leds/leds-alix2.c
++++ /dev/null
+@@ -1,239 +0,0 @@
+-/*
+- * LEDs driver for PCEngines ALIX.2 and ALIX.3
+- *
+- * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
+- */
+-
+-#include <linux/err.h>
+-#include <linux/io.h>
+-#include <linux/kernel.h>
+-#include <linux/leds.h>
+-#include <linux/module.h>
+-#include <linux/platform_device.h>
+-#include <linux/string.h>
+-#include <linux/pci.h>
+-
+-static int force = 0;
+-module_param(force, bool, 0444);
+-MODULE_PARM_DESC(force, "Assume system has ALIX.2/ALIX.3 style LEDs");
+-
+-#define MSR_LBAR_GPIO		0x5140000C
+-#define CS5535_GPIO_SIZE	256
+-
+-static u32 gpio_base;
+-
+-static struct pci_device_id divil_pci[] = {
+-	{ PCI_DEVICE(PCI_VENDOR_ID_NS,  PCI_DEVICE_ID_NS_CS5535_ISA) },
+-	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
+-	{ } /* NULL entry */
+-};
+-MODULE_DEVICE_TABLE(pci, divil_pci);
+-
+-struct alix_led {
+-	struct led_classdev cdev;
+-	unsigned short port;
+-	unsigned int on_value;
+-	unsigned int off_value;
+-};
+-
+-static void alix_led_set(struct led_classdev *led_cdev,
+-			 enum led_brightness brightness)
+-{
+-	struct alix_led *led_dev =
+-		container_of(led_cdev, struct alix_led, cdev);
+-
+-	if (brightness)
+-		outl(led_dev->on_value, gpio_base + led_dev->port);
+-	else
+-		outl(led_dev->off_value, gpio_base + led_dev->port);
+-}
+-
+-static struct alix_led alix_leds[] = {
+-	{
+-		.cdev = {
+-			.name = "alix:1",
+-			.brightness_set = alix_led_set,
+-		},
+-		.port = 0x00,
+-		.on_value = 1 << 22,
+-		.off_value = 1 << 6,
+-	},
+-	{
+-		.cdev = {
+-			.name = "alix:2",
+-			.brightness_set = alix_led_set,
+-		},
+-		.port = 0x80,
+-		.on_value = 1 << 25,
+-		.off_value = 1 << 9,
+-	},
+-	{
+-		.cdev = {
+-			.name = "alix:3",
+-			.brightness_set = alix_led_set,
+-		},
+-		.port = 0x80,
+-		.on_value = 1 << 27,
+-		.off_value = 1 << 11,
+-	},
+-};
+-
+-static int __init alix_led_probe(struct platform_device *pdev)
+-{
+-	int i;
+-	int ret;
+-
+-	for (i = 0; i < ARRAY_SIZE(alix_leds); i++) {
+-		alix_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
+-		ret = led_classdev_register(&pdev->dev, &alix_leds[i].cdev);
+-		if (ret < 0)
+-			goto fail;
+-	}
+-	return 0;
+-
+-fail:
+-	while (--i >= 0)
+-		led_classdev_unregister(&alix_leds[i].cdev);
+-	return ret;
+-}
+-
+-static int alix_led_remove(struct platform_device *pdev)
+-{
+-	int i;
+-
+-	for (i = 0; i < ARRAY_SIZE(alix_leds); i++)
+-		led_classdev_unregister(&alix_leds[i].cdev);
+-	return 0;
+-}
+-
+-static struct platform_driver alix_led_driver = {
+-	.remove = alix_led_remove,
+-	.driver = {
+-		.name = KBUILD_MODNAME,
+-		.owner = THIS_MODULE,
+-	},
+-};
+-
+-static int __init alix_present(unsigned long bios_phys,
+-				const char *alix_sig,
+-				size_t alix_sig_len)
+-{
+-	const size_t bios_len = 0x00010000;
+-	const char *bios_virt;
+-	const char *scan_end;
+-	const char *p;
+-	char name[64];
+-
+-	if (force) {
+-		printk(KERN_NOTICE "%s: forced to skip BIOS test, "
+-		       "assume system has ALIX.2 style LEDs\n",
+-		       KBUILD_MODNAME);
+-		return 1;
+-	}
+-
+-	bios_virt = phys_to_virt(bios_phys);
+-	scan_end = bios_virt + bios_len - (alix_sig_len + 2);
+-	for (p = bios_virt; p < scan_end; p++) {
+-		const char *tail;
+-		char *a;
+-
+-		if (memcmp(p, alix_sig, alix_sig_len) != 0)
+-			continue;
+-
+-		memcpy(name, p, sizeof(name));
+-
+-		/* remove the first \0 character from string */
+-		a = strchr(name, '\0');
+-		if (a)
+-			*a = ' ';
+-
+-		/* cut the string at a newline */
+-		a = strchr(name, '\r');
+-		if (a)
+-			*a = '\0';
+-
+-		tail = p + alix_sig_len;
+-		if ((tail[0] == '2' || tail[0] == '3')) {
+-			printk(KERN_INFO
+-			       "%s: system is recognized as \"%s\"\n",
+-			       KBUILD_MODNAME, name);
+-			return 1;
+-		}
+-	}
+-
+-	return 0;
+-}
+-
+-static struct platform_device *pdev;
+-
+-static int __init alix_pci_led_init(void)
+-{
+-	u32 low, hi;
+-
+-	if (pci_dev_present(divil_pci) == 0) {
+-		printk(KERN_WARNING KBUILD_MODNAME": DIVIL not found\n");
+-		return -ENODEV;
+-	}
+-
+-	/* Grab the GPIO I/O range */
+-	rdmsr(MSR_LBAR_GPIO, low, hi);
+-
+-	/* Check the mask and whether GPIO is enabled (sanity check) */
+-	if (hi != 0x0000f001) {
+-		printk(KERN_WARNING KBUILD_MODNAME": GPIO not enabled\n");
+-		return -ENODEV;
+-	}
+-
+-	/* Mask off the IO base address */
+-	gpio_base = low & 0x0000ff00;
+-
+-	if (!request_region(gpio_base, CS5535_GPIO_SIZE, KBUILD_MODNAME)) {
+-		printk(KERN_ERR KBUILD_MODNAME": can't allocate I/O for GPIO\n");
+-		return -ENODEV;
+-	}
+-
+-	/* Set GPIO function to output */
+-	outl(1 << 6, gpio_base + 0x04);
+-	outl(1 << 9, gpio_base + 0x84);
+-	outl(1 << 11, gpio_base + 0x84);
+-
+-	return 0;
+-}
+-
+-static int __init alix_led_init(void)
+-{
+-	int ret = -ENODEV;
+-	const char tinybios_sig[] = "PC Engines ALIX.";
+-	const char coreboot_sig[] = "PC Engines\0ALIX.";
+-
+-	if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
+-	    alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
+-		ret = alix_pci_led_init();
+-
+-	if (ret < 0)
+-		return ret;
+-
+-	pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
+-	if (!IS_ERR(pdev)) {
+-		ret = platform_driver_probe(&alix_led_driver, alix_led_probe);
+-		if (ret)
+-			platform_device_unregister(pdev);
+-	} else
+-		ret = PTR_ERR(pdev);
+-
+-	return ret;
+-}
+-
+-static void __exit alix_led_exit(void)
+-{
+-	platform_device_unregister(pdev);
+-	platform_driver_unregister(&alix_led_driver);
+-	release_region(gpio_base, CS5535_GPIO_SIZE);
+-}
+-
+-module_init(alix_led_init);
+-module_exit(alix_led_exit);
+-
+-MODULE_AUTHOR("Constantin Baranov <const@mimas.ru>");
+-MODULE_DESCRIPTION("PCEngines ALIX.2 and ALIX.3 LED driver");
+-MODULE_LICENSE("GPL");
diff --git a/target/linux/generic/patches-2.6.39/106-alix_platform_gpio_keys_button.patch b/target/linux/generic/patches-2.6.39/106-alix_platform_gpio_keys_button.patch
new file mode 100644
index 000000000..cd2715cd9
--- /dev/null
+++ b/target/linux/generic/patches-2.6.39/106-alix_platform_gpio_keys_button.patch
@@ -0,0 +1,106 @@
+--- a/arch/x86/platform/geode/alix.c	2011-08-13 15:51:30.892956346 -0600
++++ b/arch/x86/platform/geode/alix.c	2011-08-13 16:14:58.082329961 -0600
+@@ -6,6 +6,7 @@
+  *
+  * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
+  * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
++ *                and Philip Prindeville <philipp@redfish-solutions.com>
+  *
+  * TODO: There are large similarities with leds-net5501.c
+  * by Alessandro Zummo <a.zummo@towertech.it>
+@@ -24,14 +25,48 @@
+ #include <linux/leds.h>
+ #include <linux/platform_device.h>
+ #include <linux/gpio.h>
++#include <linux/input.h>
++#include <linux/gpio_keys.h>
+ 
+ #include <asm/geode.h>
+ 
++#define BIOS_SIGNATURE_TINYBIOS	0x000f0000
++#define BIOS_SIGNATURE_COREBOOT	0x00000050
++#define BIOS_REGION_SIZE		0x00010000
++
++static int model = 0;
++
+ static int force = 0;
+ module_param(force, bool, 0444);
+ /* FIXME: Award bios is not automatically detected as Alix platform */
+ MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
+ 
++static struct gpio_keys_button alix_gpio_buttons[] = {
++	{
++		.code = KEY_RESTART,
++		.gpio = 24,
++		.active_low = 1,
++		.desc = "Reset button",
++		.type = EV_KEY,
++		.wakeup = 0,
++		.debounce_interval = 100,
++		.can_disable = 0,
++	}
++};
++static struct gpio_keys_platform_data alix_buttons_data = {
++	.buttons = alix_gpio_buttons,
++	.nbuttons = ARRAY_SIZE(alix_gpio_buttons),
++	.poll_interval = 20,
++};
++
++static struct platform_device alix_buttons_dev = {
++	.name = "gpio-polled-keys",
++	.id = 1,
++	.dev = {
++		.platform_data = &alix_buttons_data,
++	}
++};
++
+ static struct gpio_led alix_leds[] = {
+ 	{
+ 		.name = "alix:1",
+@@ -64,17 +98,22 @@
+ 	.dev.platform_data = &alix_leds_data,
+ };
+ 
++static struct __initdata platform_device *alix_devs[] = {
++	&alix_buttons_dev,
++	&alix_leds_dev,
++};
++
+ static void __init register_alix(void)
+ {
+ 	/* Setup LED control through leds-gpio driver */
+-	platform_device_register(&alix_leds_dev);
++	platform_add_devices(alix_devs, ARRAY_SIZE(alix_devs));
+ }
+ 
+ static int __init alix_present(unsigned long bios_phys,
+ 				const char *alix_sig,
+ 				size_t alix_sig_len)
+ {
+-	const size_t bios_len = 0x00010000;
++	const size_t bios_len = BIOS_REGION_SIZE;
+ 	const char *bios_virt;
+ 	const char *scan_end;
+ 	const char *p;
+@@ -109,7 +148,9 @@
+ 			*a = '\0';
+ 
+ 		tail = p + alix_sig_len;
+-		if ((tail[0] == '2' || tail[0] == '3')) {
++		if ((tail[0] == '2' || tail[0] == '3' || tail[0] == '6')) {
++			model = tail[0] - '0';
++
+ 			printk(KERN_INFO
+ 			       "%s: system is recognized as \"%s\"\n",
+ 			       KBUILD_MODNAME, name);
+@@ -128,8 +169,8 @@
+ 	if (!is_geode())
+ 		return 0;
+ 
+-	if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
+-	    alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
++	if (alix_present(BIOS_SIGNATURE_TINYBIOS, tinybios_sig, sizeof(tinybios_sig) - 1) ||
++	    alix_present(BIOS_SIGNATURE_COREBOOT, coreboot_sig, sizeof(coreboot_sig) - 1))
+ 		register_alix();
+ 
+ 	return 0;
diff --git a/target/linux/x86/alix2/base-files/etc/config/system b/target/linux/x86/alix2/base-files/etc/config/system
new file mode 100644
index 000000000..28134b64c
--- /dev/null
+++ b/target/linux/x86/alix2/base-files/etc/config/system
@@ -0,0 +1,26 @@
+config system
+	option hostname	OpenWrt
+	option timezone	UTC
+
+config rdate
+	option interface	wan
+
+config led
+	option default	1
+	option name	LAN
+	option sysfs	'alix:1'
+	option trigger	netdev
+	option mode	'tx rx'
+	option dev	'br-lan'
+
+config led
+	option default	1
+	option name	WiFi
+	option sysfs	'alix:2'
+	option trigger	'phy0tpt'
+
+config led
+	option default	0
+	option name	Heartbeat
+	option sysfs	'alix:3'
+	option trigger	'heartbeat'
diff --git a/target/linux/x86/alix2/base-files/etc/hotplug.d/button/50-reboot b/target/linux/x86/alix2/base-files/etc/hotplug.d/button/50-reboot
new file mode 100644
index 000000000..bf893c15b
--- /dev/null
+++ b/target/linux/x86/alix2/base-files/etc/hotplug.d/button/50-reboot
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+logger -t button -p daemon.info "$BUTTON/$ACTION"
+
+case "$BUTTON/$ACTION" in
+
+reset/released)
+  reboot -f
+  ;;
+
+esac
+
+exit 0
diff --git a/target/linux/x86/alix2/target.mk b/target/linux/x86/alix2/target.mk
index e8fd737b3..0c1c3d2dc 100644
--- a/target/linux/x86/alix2/target.mk
+++ b/target/linux/x86/alix2/target.mk
@@ -15,7 +15,8 @@ DEFAULT_PACKAGES += \
 			kmod-cfg80211 kmod-mac80211 \
 			kmod-mppe kmod-pppoe kmod-pppo2ltp \
 			kmod-ath kmod-ath5k kmod-ath9k \
-			kmod-leds-gpio kmod-input-gpio-buttons \
+			kmod-leds-gpio kmod-input-gpio-keys-polled \
+			kmod-button-hotplug \
 			kmod-ledtrig-heartbeat kmod-ledtrig-gpio \
 			kmod-ledtrig-netdev kmod-ledtrig-netfilter \
 			kmod-cpu-msr \
diff --git a/target/linux/x86/config-default b/target/linux/x86/config-default
index f3fbfe71b..c620db072 100644
--- a/target/linux/x86/config-default
+++ b/target/linux/x86/config-default
@@ -452,3 +452,4 @@ CONFIG_X86_XADD=y
 # CONFIG_ZONE_DMA32 is not set
 # CONFIG_BATTERY_BQ20Z75 is not set
 # CONFIG_TRANSPARENT_HUGEPAGE is not set
+# CONFIG_ALIX is not set