openwrtv4/target/linux/ath25/patches-4.4/210-reset_button.patch

--- a/arch/mips/ath25/Makefile
+++ b/arch/mips/ath25/Makefile
@@ -8,7 +8,7 @@
 # Copyright (C) 2006-2009 Felix Fietkau <nbd@nbd.name>
 #
 
-obj-y += board.o prom.o devices.o
+obj-y += board.o prom.o devices.o reset.o
 
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 
--- /dev/null
+++ b/arch/mips/ath25/reset.c
@@ -0,0 +1,57 @@
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <ath25_platform.h>
+#include "devices.h"
+
+static int __init
+ar231x_init_reset(void)
+{
+	struct platform_device *pdev;
+	struct gpio_keys_platform_data pdata;
+	struct gpio_keys_button *p;
+	int err;
+
+	if (ath25_board.config->reset_config_gpio == 0xffff)
+		return -ENODEV;
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		goto err;
+
+	p->desc = "reset";
+	p->type = EV_KEY;
+	p->code = KEY_RESTART;
+	p->debounce_interval = 60;
+	p->gpio = ath25_board.config->reset_config_gpio;
+
+	memset(&pdata, 0, sizeof(pdata));
+	pdata.poll_interval = 20;
+	pdata.buttons = p;
+	pdata.nbuttons = 1;
+
+	pdev = platform_device_alloc("gpio-keys-polled", 0);
+	if (!pdev)
+		goto err_free;
+
+	err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+	if (err)
+		goto err_put_pdev;
+
+	err = platform_device_add(pdev);
+	if (err)
+		goto err_put_pdev;
+
+	return 0;
+
+err_put_pdev:
+	platform_device_put(pdev);
+err_free:
+	kfree(p);
+err:
+	return -ENOMEM;
+}
+
+module_init(ar231x_init_reset);