2 * arch/sh/boards/renesas/r7780rp/psw.c
4 * push switch support for RDBRP-1/RDBREVRP-1 debug boards.
6 * Copyright (C) 2006 Paul Mundt
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <mach/highlander.h>
17 #include <asm/push-switch.h>
19 static irqreturn_t
psw_irq_handler(int irq
, void *arg
)
21 struct platform_device
*pdev
= arg
;
22 struct push_switch
*psw
= platform_get_drvdata(pdev
);
23 struct push_switch_platform_info
*psw_info
= pdev
->dev
.platform_data
;
27 l
= __raw_readw(PA_DBSW
);
29 /* Nothing to do if there's no state change */
36 /* Figure out who raised it */
37 if (mask
& (1 << psw_info
->bit
)) {
38 psw
->state
= !!(mask
& (1 << psw_info
->bit
));
39 if (psw
->state
) /* debounce */
40 mod_timer(&psw
->debounce
, jiffies
+ 50);
46 /* Clear the switch IRQs */
48 __raw_writew(l
, PA_DBSW
);
50 return IRQ_RETVAL(ret
);
53 static struct resource psw_resources
[] = {
56 .flags
= IORESOURCE_IRQ
,
60 static struct push_switch_platform_info s2_platform_data
= {
63 .irq_flags
= IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
|
65 .irq_handler
= psw_irq_handler
,
68 static struct platform_device s2_switch_device
= {
69 .name
= "push-switch",
71 .num_resources
= ARRAY_SIZE(psw_resources
),
72 .resource
= psw_resources
,
74 .platform_data
= &s2_platform_data
,
78 static struct push_switch_platform_info s3_platform_data
= {
81 .irq_flags
= IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
|
83 .irq_handler
= psw_irq_handler
,
86 static struct platform_device s3_switch_device
= {
87 .name
= "push-switch",
89 .num_resources
= ARRAY_SIZE(psw_resources
),
90 .resource
= psw_resources
,
92 .platform_data
= &s3_platform_data
,
96 static struct push_switch_platform_info s4_platform_data
= {
99 .irq_flags
= IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
|
101 .irq_handler
= psw_irq_handler
,
104 static struct platform_device s4_switch_device
= {
105 .name
= "push-switch",
107 .num_resources
= ARRAY_SIZE(psw_resources
),
108 .resource
= psw_resources
,
110 .platform_data
= &s4_platform_data
,
114 static struct platform_device
*psw_devices
[] = {
115 &s2_switch_device
, &s3_switch_device
, &s4_switch_device
,
118 static int __init
psw_init(void)
120 return platform_add_devices(psw_devices
, ARRAY_SIZE(psw_devices
));
122 module_init(psw_init
);