/* * arch/sh/boards/renesas/r7780rp/psw.c * * push switch support for RDBRP-1/RDBREVRP-1 debug boards. * * Copyright (C) 2006  Paul Mundt * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. */#include <linux/io.h>#include <linux/init.h>#include <linux/interrupt.h>#include <linux/platform_device.h>#include <asm/mach/r7780rp.h>#include <asm/push-switch.h>static irqreturn_t psw_irq_handler(int irq, void *arg){	struct platform_device *pdev = arg;	struct push_switch *psw = platform_get_drvdata(pdev);	struct push_switch_platform_info *psw_info = pdev->dev.platform_data;	unsigned int l, mask;	int ret = 0;	l = ctrl_inw(PA_DBSW);	/* Nothing to do if there's no state change */	if (psw->state) {		ret = 1;		goto out;	}	mask = l & 0x70;	/* Figure out who raised it */	if (mask & (1 << psw_info->bit)) {		psw->state = !!(mask & (1 << psw_info->bit));		if (psw->state)	/* debounce */			mod_timer(&psw->debounce, jiffies + 50);		ret = 1;	}out:	/* Clear the switch IRQs */	l |= (0x7 << 12);	ctrl_outw(l, PA_DBSW);	return IRQ_RETVAL(ret);}static struct resource psw_resources[] = {	[0] = {		.start	= IRQ_PSW,		.flags	= IORESOURCE_IRQ,	},};static struct push_switch_platform_info s2_platform_data = {	.name		= "s2",	.bit		= 6,	.irq_flags	= IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |			  IRQF_SHARED,	.irq_handler	= psw_irq_handler,};static struct platform_device s2_switch_device = {	.name		= "push-switch",	.id		= 0,	.num_resources	= ARRAY_SIZE(psw_resources),	.resource	= psw_resources,	.dev		= {		.platform_data = &s2_platform_data,	},};static struct push_switch_platform_info s3_platform_data = {	.name		= "s3",	.bit		= 5,	.irq_flags	= IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |			  IRQF_SHARED,	.irq_handler	= psw_irq_handler,};static struct platform_device s3_switch_device = {	.name		= "push-switch",	.id		= 1,	.num_resources	= ARRAY_SIZE(psw_resources),	.resource	= psw_resources,	.dev		= {		.platform_data = &s3_platform_data,	},};static struct push_switch_platform_info s4_platform_data = {	.name		= "s4",	.bit		= 4,	.irq_flags	= IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |			  IRQF_SHARED,	.irq_handler	= psw_irq_handler,};static struct platform_device s4_switch_device = {	.name		= "push-switch",	.id		= 2,	.num_resources	= ARRAY_SIZE(psw_resources),	.resource	= psw_resources,	.dev		= {		.platform_data = &s4_platform_data,	},};static struct platform_device *psw_devices[] = {	&s2_switch_device, &s3_switch_device, &s4_switch_device,};static int __init psw_init(void){	return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));}module_init(psw_init);