1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * arch/sh/boards/landisk/psw.c
4 *
5 * push switch support for LANDISK and USL-5P
6 *
7 * Copyright (C) 2006-2007 Paul Mundt
8 * Copyright (C) 2007 kogiidena
9 */
10 #include <linux/io.h>
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>
16
17 static irqreturn_t psw_irq_handler(int irq, void *arg)
18 {
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;
23 int ret = 0;
24
25 sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));
26
27 /* Nothing to do if there's no state change */
28 if (psw->state) {
29 ret = 1;
30 goto out;
31 }
32
33 /* Figure out who raised it */
34 if (sw_value & (1 << psw_info->bit)) {
35 psw->state = 1;
36 mod_timer(&psw->debounce, jiffies + 50);
37 ret = 1;
38 }
39
40 out:
41 /* Clear the switch IRQs */
42 __raw_writeb(0x00, PA_PWRINT_CLR);
43
44 return IRQ_RETVAL(ret);
45 }
46
47 static struct resource psw_power_resources[] = {
48 [0] = {
49 .start = IRQ_POWER,
50 .flags = IORESOURCE_IRQ,
51 },
52 };
53
54 static struct resource psw_usl5p_resources[] = {
55 [0] = {
56 .start = IRQ_BUTTON,
57 .flags = IORESOURCE_IRQ,
58 },
59 };
60
61 static struct push_switch_platform_info psw_power_platform_data = {
62 .name = "psw_power",
63 .bit = 4,
64 .irq_flags = IRQF_SHARED,
65 .irq_handler = psw_irq_handler,
66 };
67
68 static struct push_switch_platform_info psw1_platform_data = {
69 .name = "psw1",
70 .bit = 0,
71 .irq_flags = IRQF_SHARED,
72 .irq_handler = psw_irq_handler,
73 };
74
75 static struct push_switch_platform_info psw2_platform_data = {
76 .name = "psw2",
77 .bit = 2,
78 .irq_flags = IRQF_SHARED,
79 .irq_handler = psw_irq_handler,
80 };
81
82 static struct push_switch_platform_info psw3_platform_data = {
83 .name = "psw3",
84 .bit = 1,
85 .irq_flags = IRQF_SHARED,
86 .irq_handler = psw_irq_handler,
87 };
88
89 static struct platform_device psw_power_switch_device = {
90 .name = "push-switch",
91 .id = 0,
92 .num_resources = ARRAY_SIZE(psw_power_resources),
93 .resource = psw_power_resources,
94 .dev = {
95 .platform_data = &psw_power_platform_data,
96 },
97 };
98
99 static struct platform_device psw1_switch_device = {
100 .name = "push-switch",
101 .id = 1,
102 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
103 .resource = psw_usl5p_resources,
104 .dev = {
105 .platform_data = &psw1_platform_data,
106 },
107 };
108
109 static struct platform_device psw2_switch_device = {
110 .name = "push-switch",
111 .id = 2,
112 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
113 .resource = psw_usl5p_resources,
114 .dev = {
115 .platform_data = &psw2_platform_data,
116 },
117 };
118
119 static struct platform_device psw3_switch_device = {
120 .name = "push-switch",
121 .id = 3,
122 .num_resources = ARRAY_SIZE(psw_usl5p_resources),
123 .resource = psw_usl5p_resources,
124 .dev = {
125 .platform_data = &psw3_platform_data,
126 },
127 };
128
129 static struct platform_device *psw_devices[] = {
130 &psw_power_switch_device,
131 &psw1_switch_device,
132 &psw2_switch_device,
133 &psw3_switch_device,
134 };
135
136 static int __init psw_init(void)
137 {
138 return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
139 }
140 device_initcall(psw_init);
141
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