1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * System Specific setup for Traverse Technologies GEOS.
4 * At the moment this means setup of GPIO control of LEDs.
5 *
6 * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
7 * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
8 *                and Philip Prindeville <philipp@redfish-solutions.com>
9 *
10 * TODO: There are large similarities with leds-net5501.c
11 * by Alessandro Zummo <a.zummo@towertech.it>
12 * In the future leds-net5501.c should be migrated over to platform
13 */
14
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/io.h>
18#include <linux/string.h>
19#include <linux/leds.h>
20#include <linux/platform_device.h>
21#include <linux/input.h>
22#include <linux/gpio_keys.h>
23#include <linux/dmi.h>
24
25#include <asm/geode.h>
26
27static struct gpio_keys_button geos_gpio_buttons[] = {
28	{
29		.code = KEY_RESTART,
30		.gpio = 3,
31		.active_low = 1,
32		.desc = "Reset button",
33		.type = EV_KEY,
34		.wakeup = 0,
35		.debounce_interval = 100,
36		.can_disable = 0,
37	}
38};
39static struct gpio_keys_platform_data geos_buttons_data = {
40	.buttons = geos_gpio_buttons,
41	.nbuttons = ARRAY_SIZE(geos_gpio_buttons),
42	.poll_interval = 20,
43};
44
45static struct platform_device geos_buttons_dev = {
46	.name = "gpio-keys-polled",
47	.id = 1,
48	.dev = {
49		.platform_data = &geos_buttons_data,
50	}
51};
52
53static struct gpio_led geos_leds[] = {
54	{
55		.name = "geos:1",
56		.gpio = 6,
57		.default_trigger = "default-on",
58		.active_low = 1,
59	},
60	{
61		.name = "geos:2",
62		.gpio = 25,
63		.default_trigger = "default-off",
64		.active_low = 1,
65	},
66	{
67		.name = "geos:3",
68		.gpio = 27,
69		.default_trigger = "default-off",
70		.active_low = 1,
71	},
72};
73
74static struct gpio_led_platform_data geos_leds_data = {
75	.num_leds = ARRAY_SIZE(geos_leds),
76	.leds = geos_leds,
77};
78
79static struct platform_device geos_leds_dev = {
80	.name = "leds-gpio",
81	.id = -1,
82	.dev.platform_data = &geos_leds_data,
83};
84
85static struct platform_device *geos_devs[] __initdata = {
86	&geos_buttons_dev,
87	&geos_leds_dev,
88};
89
90static void __init register_geos(void)
91{
92	/* Setup LED control through leds-gpio driver */
93	platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
94}
95
96static int __init geos_init(void)
97{
98	const char *vendor, *product;
99
100	if (!is_geode())
101		return 0;
102
103	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
104	if (!vendor || strcmp(vendor, "Traverse Technologies"))
105		return 0;
106
107	product = dmi_get_system_info(DMI_PRODUCT_NAME);
108	if (!product || strcmp(product, "Geos"))
109		return 0;
110
111	printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
112	       KBUILD_MODNAME, vendor, product);
113
114	register_geos();
115
116	return 0;
117}
118device_initcall(geos_init);
119