1 // SPDX-License-Identifier: GPL-2.0
3 * arch/sh/boards/landisk/psw.c
5 * push switch support for LANDISK and USL-5P
7 * Copyright (C) 2006-2007 Paul Mundt
8 * Copyright (C) 2007 kogiidena
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <mach-landisk/mach/iodata_landisk.h>
15 #include <asm/push-switch.h>
17 static irqreturn_t psw_irq_handler(int irq, void *arg)
19 struct platform_device *pdev = arg;
20 struct push_switch *psw = platform_get_drvdata(pdev);
21 struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
22 unsigned int sw_value;
25 sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));
27 /* Nothing to do if there's no state change */
33 /* Figure out who raised it */
34 if (sw_value & (1 << psw_info->bit)) {
36 mod_timer(&psw->debounce, jiffies + 50);
41 /* Clear the switch IRQs */
42 __raw_writeb(0x00, PA_PWRINT_CLR);
44 return IRQ_RETVAL(ret);
47 static struct resource psw_power_resources[] = {
50 .flags = IORESOURCE_IRQ,
54 static struct resource psw_usl5p_resources[] = {
57 .flags = IORESOURCE_IRQ,
61 static struct push_switch_platform_info psw_power_platform_data = {
64 .irq_flags = IRQF_SHARED,
65 .irq_handler = psw_irq_handler,
68 static struct push_switch_platform_info psw1_platform_data = {
71 .irq_flags = IRQF_SHARED,
72 .irq_handler = psw_irq_handler,
75 static struct push_switch_platform_info psw2_platform_data = {
78 .irq_flags = IRQF_SHARED,
79 .irq_handler = psw_irq_handler,
82 static struct push_switch_platform_info psw3_platform_data = {
85 .irq_flags = IRQF_SHARED,
86 .irq_handler = psw_irq_handler,
89 static struct platform_device psw_power_switch_device = {
90 .name = "push-switch",
92 .num_resources = ARRAY_SIZE(psw_power_resources),
93 .resource = psw_power_resources,
95 .platform_data = &psw_power_platform_data,
99 static struct platform_device psw1_switch_device = {
100 .name = "push-switch",
102 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
103 .resource = psw_usl5p_resources,
105 .platform_data = &psw1_platform_data,
109 static struct platform_device psw2_switch_device = {
110 .name = "push-switch",
112 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
113 .resource = psw_usl5p_resources,
115 .platform_data = &psw2_platform_data,
119 static struct platform_device psw3_switch_device = {
120 .name = "push-switch",
122 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
123 .resource = psw_usl5p_resources,
125 .platform_data = &psw3_platform_data,
129 static struct platform_device *psw_devices[] = {
130 &psw_power_switch_device,
136 static int __init psw_init(void)
138 return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
140 device_initcall(psw_init);