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authorPaul Mundt <lethal@linux-sh.org>2006-11-23 21:24:39 -0500
committerPaul Mundt <lethal@linux-sh.org>2006-12-05 20:45:38 -0500
commit9daa0c257d6c200b58092e0bfc32b77c4618a8af (patch)
treebe40047ad34250a61bfff9628a9edcc055db7135 /arch/sh/boards
parent9f5e8eee5cfe1328660c71812d87c2a67bda389f (diff)
sh: R7780RP push-switch support.
This adds simple push-switch support for the RDBRP-1/RDBREVRP-1 debug boards found on the R7780RP-1. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards')
-rw-r--r--arch/sh/boards/renesas/r7780rp/Makefile4
-rw-r--r--arch/sh/boards/renesas/r7780rp/psw.c122
2 files changed, 125 insertions, 1 deletions
diff --git a/arch/sh/boards/renesas/r7780rp/Makefile b/arch/sh/boards/renesas/r7780rp/Makefile
index f1776d027978..574b0316ed56 100644
--- a/arch/sh/boards/renesas/r7780rp/Makefile
+++ b/arch/sh/boards/renesas/r7780rp/Makefile
@@ -3,4 +3,6 @@
3# 3#
4 4
5obj-y := setup.o io.o irq.o 5obj-y := setup.o io.o irq.o
6obj-$(CONFIG_HEARTBEAT) += led.o 6
7obj-$(CONFIG_HEARTBEAT) += led.o
8obj-$(CONFIG_PUSH_SWITCH) += psw.o
diff --git a/arch/sh/boards/renesas/r7780rp/psw.c b/arch/sh/boards/renesas/r7780rp/psw.c
new file mode 100644
index 000000000000..c844dfa5d58d
--- /dev/null
+++ b/arch/sh/boards/renesas/r7780rp/psw.c
@@ -0,0 +1,122 @@
1/*
2 * arch/sh/boards/renesas/r7780rp/psw.c
3 *
4 * push switch support for RDBRP-1/RDBREVRP-1 debug boards.
5 *
6 * Copyright (C) 2006 Paul Mundt
7 *
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
10 * for more details.
11 */
12#include <linux/io.h>
13#include <linux/init.h>
14#include <linux/interrupt.h>
15#include <linux/platform_device.h>
16#include <asm/mach/r7780rp.h>
17#include <asm/push-switch.h>
18
19static irqreturn_t psw_irq_handler(int irq, void *arg)
20{
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;
24 unsigned int l, mask;
25 int ret = 0;
26
27 l = ctrl_inw(PA_DBSW);
28
29 /* Nothing to do if there's no state change */
30 if (psw->state) {
31 ret = 1;
32 goto out;
33 }
34
35 mask = l & 0x70;
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);
41
42 ret = 1;
43 }
44
45out:
46 /* Clear the switch IRQs */
47 l |= (0x7 << 12);
48 ctrl_outw(l, PA_DBSW);
49
50 return IRQ_RETVAL(ret);
51}
52
53static struct resource psw_resources[] = {
54 [0] = {
55 .start = IRQ_PSW,
56 .flags = IORESOURCE_IRQ,
57 },
58};
59
60static struct push_switch_platform_info s2_platform_data = {
61 .name = "s2",
62 .bit = 6,
63 .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
64 IRQF_SHARED,
65 .irq_handler = psw_irq_handler,
66};
67
68static struct platform_device s2_switch_device = {
69 .name = "push-switch",
70 .id = 0,
71 .num_resources = ARRAY_SIZE(psw_resources),
72 .resource = psw_resources,
73 .dev = {
74 .platform_data = &s2_platform_data,
75 },
76};
77
78static struct push_switch_platform_info s3_platform_data = {
79 .name = "s3",
80 .bit = 5,
81 .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
82 IRQF_SHARED,
83 .irq_handler = psw_irq_handler,
84};
85
86static struct platform_device s3_switch_device = {
87 .name = "push-switch",
88 .id = 1,
89 .num_resources = ARRAY_SIZE(psw_resources),
90 .resource = psw_resources,
91 .dev = {
92 .platform_data = &s3_platform_data,
93 },
94};
95
96static struct push_switch_platform_info s4_platform_data = {
97 .name = "s4",
98 .bit = 4,
99 .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
100 IRQF_SHARED,
101 .irq_handler = psw_irq_handler,
102};
103
104static struct platform_device s4_switch_device = {
105 .name = "push-switch",
106 .id = 2,
107 .num_resources = ARRAY_SIZE(psw_resources),
108 .resource = psw_resources,
109 .dev = {
110 .platform_data = &s4_platform_data,
111 },
112};
113
114static struct platform_device *psw_devices[] = {
115 &s2_switch_device, &s3_switch_device, &s4_switch_device,
116};
117
118static int __init psw_init(void)
119{
120 return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
121}
122module_init(psw_init);