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/gpio.h> 22 #include <linux/input.h> 23 #include <linux/gpio_keys.h> 24 #include <linux/dmi.h> 25 26 #include <asm/geode.h> 27 28 static struct gpio_keys_button geos_gpio_buttons[] = { 29 { 30 .code = KEY_RESTART, 31 .gpio = 3, 32 .active_low = 1, 33 .desc = "Reset button", 34 .type = EV_KEY, 35 .wakeup = 0, 36 .debounce_interval = 100, 37 .can_disable = 0, 38 } 39 }; 40 static struct gpio_keys_platform_data geos_buttons_data = { 41 .buttons = geos_gpio_buttons, 42 .nbuttons = ARRAY_SIZE(geos_gpio_buttons), 43 .poll_interval = 20, 44 }; 45 46 static struct platform_device geos_buttons_dev = { 47 .name = "gpio-keys-polled", 48 .id = 1, 49 .dev = { 50 .platform_data = &geos_buttons_data, 51 } 52 }; 53 54 static struct gpio_led geos_leds[] = { 55 { 56 .name = "geos:1", 57 .gpio = 6, 58 .default_trigger = "default-on", 59 .active_low = 1, 60 }, 61 { 62 .name = "geos:2", 63 .gpio = 25, 64 .default_trigger = "default-off", 65 .active_low = 1, 66 }, 67 { 68 .name = "geos:3", 69 .gpio = 27, 70 .default_trigger = "default-off", 71 .active_low = 1, 72 }, 73 }; 74 75 static struct gpio_led_platform_data geos_leds_data = { 76 .num_leds = ARRAY_SIZE(geos_leds), 77 .leds = geos_leds, 78 }; 79 80 static struct platform_device geos_leds_dev = { 81 .name = "leds-gpio", 82 .id = -1, 83 .dev.platform_data = &geos_leds_data, 84 }; 85 86 static struct platform_device *geos_devs[] __initdata = { 87 &geos_buttons_dev, 88 &geos_leds_dev, 89 }; 90 91 static void __init register_geos(void) 92 { 93 /* Setup LED control through leds-gpio driver */ 94 platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs)); 95 } 96 97 static int __init geos_init(void) 98 { 99 const char *vendor, *product; 100 101 if (!is_geode()) 102 return 0; 103 104 vendor = dmi_get_system_info(DMI_SYS_VENDOR); 105 if (!vendor || strcmp(vendor, "Traverse Technologies")) 106 return 0; 107 108 product = dmi_get_system_info(DMI_PRODUCT_NAME); 109 if (!product || strcmp(product, "Geos")) 110 return 0; 111 112 printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n", 113 KBUILD_MODNAME, vendor, product); 114 115 register_geos(); 116 117 return 0; 118 } 119 device_initcall(geos_init); 120