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/leds.h> 23 #include <linux/platform_device.h> 24 #include <linux/gpio.h> 25 #include <linux/input.h> 26 #include <linux/gpio_keys.h> 27 #include <linux/dmi.h> 28 29 #include <asm/geode.h> 30 31 static struct gpio_keys_button geos_gpio_buttons[] = { 32 { 33 .code = KEY_RESTART, 34 .gpio = 3, 35 .active_low = 1, 36 .desc = "Reset button", 37 .type = EV_KEY, 38 .wakeup = 0, 39 .debounce_interval = 100, 40 .can_disable = 0, 41 } 42 }; 43 static struct gpio_keys_platform_data geos_buttons_data = { 44 .buttons = geos_gpio_buttons, 45 .nbuttons = ARRAY_SIZE(geos_gpio_buttons), 46 .poll_interval = 20, 47 }; 48 49 static struct platform_device geos_buttons_dev = { 50 .name = "gpio-keys-polled", 51 .id = 1, 52 .dev = { 53 .platform_data = &geos_buttons_data, 54 } 55 }; 56 57 static struct gpio_led geos_leds[] = { 58 { 59 .name = "geos:1", 60 .gpio = 6, 61 .default_trigger = "default-on", 62 .active_low = 1, 63 }, 64 { 65 .name = "geos:2", 66 .gpio = 25, 67 .default_trigger = "default-off", 68 .active_low = 1, 69 }, 70 { 71 .name = "geos:3", 72 .gpio = 27, 73 .default_trigger = "default-off", 74 .active_low = 1, 75 }, 76 }; 77 78 static struct gpio_led_platform_data geos_leds_data = { 79 .num_leds = ARRAY_SIZE(geos_leds), 80 .leds = geos_leds, 81 }; 82 83 static struct platform_device geos_leds_dev = { 84 .name = "leds-gpio", 85 .id = -1, 86 .dev.platform_data = &geos_leds_data, 87 }; 88 89 static struct platform_device *geos_devs[] __initdata = { 90 &geos_buttons_dev, 91 &geos_leds_dev, 92 }; 93 94 static void __init register_geos(void) 95 { 96 /* Setup LED control through leds-gpio driver */ 97 platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs)); 98 } 99 100 static int __init geos_init(void) 101 { 102 const char *vendor, *product; 103 104 if (!is_geode()) 105 return 0; 106 107 vendor = dmi_get_system_info(DMI_SYS_VENDOR); 108 if (!vendor || strcmp(vendor, "Traverse Technologies")) 109 return 0; 110 111 product = dmi_get_system_info(DMI_PRODUCT_NAME); 112 if (!product || strcmp(product, "Geos")) 113 return 0; 114 115 printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n", 116 KBUILD_MODNAME, vendor, product); 117 118 register_geos(); 119 120 return 0; 121 } 122 device_initcall(geos_init); 123