1/*
2 * System Specific setup for Traverse Technologies GEOS.
3 * At the moment this means setup of GPIO control of LEDs.
4 *
5 * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
6 * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
7 *                and Philip Prindeville <philipp@redfish-solutions.com>
8 *
9 * TODO: There are large similarities with leds-net5501.c
10 * by Alessandro Zummo <a.zummo@towertech.it>
11 * In the future leds-net5501.c should be migrated over to platform
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 * as published by the Free Software Foundation.
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/io.h>
21#include <linux/string.h>
22#include <linux/module.h>
23#include <linux/leds.h>
24#include <linux/platform_device.h>
25#include <linux/gpio.h>
26#include <linux/input.h>
27#include <linux/gpio_keys.h>
28#include <linux/dmi.h>
29
30#include <asm/geode.h>
31
32static struct gpio_keys_button geos_gpio_buttons[] = {
33	{
34		.code = KEY_RESTART,
35		.gpio = 3,
36		.active_low = 1,
37		.desc = "Reset button",
38		.type = EV_KEY,
39		.wakeup = 0,
40		.debounce_interval = 100,
41		.can_disable = 0,
42	}
43};
44static struct gpio_keys_platform_data geos_buttons_data = {
45	.buttons = geos_gpio_buttons,
46	.nbuttons = ARRAY_SIZE(geos_gpio_buttons),
47	.poll_interval = 20,
48};
49
50static struct platform_device geos_buttons_dev = {
51	.name = "gpio-keys-polled",
52	.id = 1,
53	.dev = {
54		.platform_data = &geos_buttons_data,
55	}
56};
57
58static struct gpio_led geos_leds[] = {
59	{
60		.name = "geos:1",
61		.gpio = 6,
62		.default_trigger = "default-on",
63		.active_low = 1,
64	},
65	{
66		.name = "geos:2",
67		.gpio = 25,
68		.default_trigger = "default-off",
69		.active_low = 1,
70	},
71	{
72		.name = "geos:3",
73		.gpio = 27,
74		.default_trigger = "default-off",
75		.active_low = 1,
76	},
77};
78
79static struct gpio_led_platform_data geos_leds_data = {
80	.num_leds = ARRAY_SIZE(geos_leds),
81	.leds = geos_leds,
82};
83
84static struct platform_device geos_leds_dev = {
85	.name = "leds-gpio",
86	.id = -1,
87	.dev.platform_data = &geos_leds_data,
88};
89
90static struct platform_device *geos_devs[] __initdata = {
91	&geos_buttons_dev,
92	&geos_leds_dev,
93};
94
95static void __init register_geos(void)
96{
97	/* Setup LED control through leds-gpio driver */
98	platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
99}
100
101static int __init geos_init(void)
102{
103	const char *vendor, *product;
104
105	if (!is_geode())
106		return 0;
107
108	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
109	if (!vendor || strcmp(vendor, "Traverse Technologies"))
110		return 0;
111
112	product = dmi_get_system_info(DMI_PRODUCT_NAME);
113	if (!product || strcmp(product, "Geos"))
114		return 0;
115
116	printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
117	       KBUILD_MODNAME, vendor, product);
118
119	register_geos();
120
121	return 0;
122}
123
124module_init(geos_init);
125
126MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
127MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
128MODULE_LICENSE("GPL");
129