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path: root/target/linux/lantiq/patches-2.6.39/520-register_buttons.patch
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--- a/arch/mips/lantiq/Makefile
+++ b/arch/mips/lantiq/Makefile
@@ -4,7 +4,7 @@
 # under the terms of the GNU General Public License version 2 as published
 # by the Free Software Foundation.
 
-obj-y := irq.o setup.o clk.o prom.o devices.o
+obj-y := irq.o setup.o clk.o prom.o devices.o dev-gpio-buttons.o
 
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 
--- /dev/null
+++ b/arch/mips/lantiq/dev-gpio-buttons.c
@@ -0,0 +1,58 @@
+/*
+ *  Lantiq GPIO button support
+ *
+ *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  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/init.h"
+#include "linux/slab.h"
+#include <linux/platform_device.h>
+
+#include "dev-gpio-buttons.h"
+
+void __init ltq_register_gpio_keys_polled(int id,
+					     unsigned poll_interval,
+					     unsigned nbuttons,
+					     struct gpio_keys_button *buttons)
+{
+	struct platform_device *pdev;
+	struct gpio_keys_platform_data pdata;
+	struct gpio_keys_button *p;
+	int err;
+
+	p = kmalloc(nbuttons * sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return;
+
+	memcpy(p, buttons, nbuttons * sizeof(*p));
+
+	pdev = platform_device_alloc("gpio-keys-polled", id);
+	if (!pdev)
+		goto err_free_buttons;
+
+	memset(&pdata, 0, sizeof(pdata));
+	pdata.poll_interval = poll_interval;
+	pdata.nbuttons = nbuttons;
+	pdata.buttons = p;
+
+	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;
+
+err_put_pdev:
+	platform_device_put(pdev);
+
+err_free_buttons:
+	kfree(p);
+}
--- /dev/null
+++ b/arch/mips/lantiq/dev-gpio-buttons.h
@@ -0,0 +1,26 @@
+/*
+ *  Lantiq GPIO button support
+ *
+ *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  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.
+ */
+
+#ifndef _LANTIQ_DEV_GPIO_BUTTONS_H
+#define _LANTIQ_DEV_GPIO_BUTTONS_H
+
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+
+#define LTQ_KEYS_POLL_INTERVAL		20 /* msecs */
+#define LTQ_KEYS_DEBOUNCE_INTERVAL	(3 * LTQ_KEYS_POLL_INTERVAL)
+
+void ltq_register_gpio_keys_polled(int id,
+				      unsigned poll_interval,
+				      unsigned nbuttons,
+				      struct gpio_keys_button *buttons);
+
+#endif /* _LANTIQ_DEV_GPIO_BUTTONS_H */