ramips: add common gpio-buttons device

SVN-Revision: 19404

4 files changed, 93 insertions, 1 deletions

diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/dev-gpio-buttons.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/dev-gpio-buttons.h
new file mode 100644
index 0000000..c1ae71e
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/dev-gpio-buttons.h
@@ -0,0 +1,31 @@
+/*
+ *  Ralink SoC GPIO button support
+ *
+ *  Copyright (C) 2010 Gabor Juhos <juhosg@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 __ASM_MACH_RALINK_DEV_GPIO_BUTTONS_H
+#define __ASM_MACH_RALINK_DEV_GPIO_BUTTONS_H
+
+#include <linux/input.h>
+#include <linux/gpio_buttons.h>
+
+#ifdef CONFIG_RALINK_DEV_GPIO_BUTTONS
+void __init ramips_register_gpio_buttons(int id,
+					 unsigned poll_interval,
+					 unsigned nbuttons,
+					 struct gpio_button *buttons);
+#else
+static inline void ramips_register_gpio_buttons(int id,
+						unsigned poll_interval,
+						unsigned nbuttons,
+						struct gpio_button *buttons);
+{
+}
+#endif
+
+#endif /* __ASM_MACH_RALINK_DEV_GPIO_BUTTONS_H */
diff --git a/target/linux/ramips/files/arch/mips/ralink/Kconfig b/target/linux/ramips/files/arch/mips/ralink/Kconfig
index fac5c7b..c30dbe1 100644
--- a/target/linux/ramips/files/arch/mips/ralink/Kconfig
+++ b/target/linux/ramips/files/arch/mips/ralink/Kconfig
@@ -48,6 +48,9 @@ config SOC_RT305X
 	select SYS_HAS_EARLY_PRINTK
 	select MIPS_MACHINE
 
+config RALINK_DEV_GPIO_BUTTONS
+	def_bool n
+
 config RALINK_DEV_GPIO_LEDS
 	def_bool n
 
diff --git a/target/linux/ramips/files/arch/mips/ralink/common/Makefile b/target/linux/ramips/files/arch/mips/ralink/common/Makefile
index c2cf48b..adab85f 100644
--- a/target/linux/ramips/files/arch/mips/ralink/common/Makefile
+++ b/target/linux/ramips/files/arch/mips/ralink/common/Makefile
@@ -1,7 +1,7 @@
 #
 # Makefile for the Ralink common stuff
 #
-# Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+# Copyright (C) 2009-2010 Gabor Juhos <juhosg@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
@@ -9,4 +9,5 @@
 
 obj-y	:= prom.o setup.o intc.o gpio.o
 
+obj-$(CONFIG_RALINK_DEV_GPIO_BUTTONS)	+= dev-gpio-buttons.o
 obj-$(CONFIG_RALINK_DEV_GPIO_LEDS)	+= dev-gpio-leds.o
diff --git a/target/linux/ramips/files/arch/mips/ralink/common/dev-gpio-buttons.c b/target/linux/ramips/files/arch/mips/ralink/common/dev-gpio-buttons.c
new file mode 100644
index 0000000..f323001
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/common/dev-gpio-buttons.c
@@ -0,0 +1,57 @@
+/*
+ *  Ralink SoC GPIO button support
+ *
+ *  Copyright (C) 2010 Gabor Juhos <juhosg@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/platform_device.h>
+
+#include <asm/mach-ralink/dev-gpio-buttons.h>
+
+void __init ramips_register_gpio_buttons(int id,
+					 unsigned poll_interval,
+					 unsigned nbuttons,
+					 struct gpio_button *buttons)
+{
+	struct platform_device *pdev;
+	struct gpio_buttons_platform_data pdata;
+	struct gpio_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-buttons", 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);
+}