1 // SPDX-License-Identifier: GPL-2.0-only
3 * System Specific setup for Soekris net5501
4 * At the moment this means setup of GPIO control of LEDs and buttons
7 * Copyright (C) 2008-2009 Tower Technologies
8 * Written by Alessandro Zummo <a.zummo@towertech.it>
10 * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
11 * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
12 * and Philip Prindeville <philipp@redfish-solutions.com>
15 #include <linux/kernel.h>
16 #include <linux/init.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>
24 #include <asm/geode.h>
26 #define BIOS_REGION_BASE 0xffff0000
27 #define BIOS_REGION_SIZE 0x00010000
29 static struct gpio_keys_button net5501_gpio_buttons[] = {
34 .desc = "Reset button",
37 .debounce_interval = 100,
41 static struct gpio_keys_platform_data net5501_buttons_data = {
42 .buttons = net5501_gpio_buttons,
43 .nbuttons = ARRAY_SIZE(net5501_gpio_buttons),
47 static struct platform_device net5501_buttons_dev = {
48 .name = "gpio-keys-polled",
51 .platform_data = &net5501_buttons_data,
55 static struct gpio_led net5501_leds[] = {
59 .default_trigger = "default-on",
64 static struct gpio_led_platform_data net5501_leds_data = {
65 .num_leds = ARRAY_SIZE(net5501_leds),
69 static struct platform_device net5501_leds_dev = {
72 .dev.platform_data = &net5501_leds_data,
75 static struct platform_device *net5501_devs[] __initdata = {
80 static void __init register_net5501(void)
82 /* Setup LED control through leds-gpio driver */
83 platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
86 struct net5501_board {
92 static struct net5501_board __initdata boards[] = {
93 { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
94 { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
97 static bool __init net5501_present(void)
100 unsigned char *rombase, *bios;
103 rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
105 printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
109 bios = rombase + 0x20; /* null terminated */
111 if (memcmp(bios, "comBIOS", 7))
114 for (i = 0; i < ARRAY_SIZE(boards); i++) {
115 unsigned char *model = rombase + boards[i].offset;
117 if (!memcmp(model, boards[i].sig, boards[i].len)) {
118 printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
119 KBUILD_MODNAME, model);
131 static int __init net5501_init(void)
136 if (!net5501_present())
143 device_initcall(net5501_init);