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
32 static 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 };
44 static 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
50 static 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
58 static 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
79 static struct gpio_led_platform_data geos_leds_data = {
80 .num_leds = ARRAY_SIZE(geos_leds),
81 .leds = geos_leds,
82 };
83
84 static struct platform_device geos_leds_dev = {
85 .name = "leds-gpio",
86 .id = -1,
87 .dev.platform_data = &geos_leds_data,
88 };
89
90 static struct platform_device *geos_devs[] __initdata = {
91 &geos_buttons_dev,
92 &geos_leds_dev,
93 };
94
register_geos(void)95 static 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
geos_init(void)101 static 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
124 module_init(geos_init);
125
126 MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
127 MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
128 MODULE_LICENSE("GPL");
129