From 3197059af0762c191af23c0ce3fd6f8311c564e7 Mon Sep 17 00:00:00 2001 From: "Philip A. Prindeville" Date: Sat, 14 Jan 2012 01:45:39 -0700 Subject: [PATCH] geos: Platform driver for Geos and Geos2 single-board computers. Trivial platform driver for Traverse Technologies Geos and Geos2 single-board computers. Uses SMBIOS to identify platform. Based on progressive revisions of the leds-net5501 driver that was rewritten by Ed Wildgoose as a platform driver. Supports GPIO-based LEDs (3) and 1 polled button which is typically used for a soft reset. Signed-off-by: Philip Prindeville Reviewed-by: Ed Wildgoose Acked-by: Andres Salomon Cc: Richard Purdie Cc: Andrew Morton Signed-off-by: Matthew Garrett --- arch/x86/Kconfig | 7 ++ arch/x86/platform/geode/Makefile | 1 + arch/x86/platform/geode/geos.c | 128 +++++++++++++++++++++++++++++++ 3 files changed, 136 insertions(+) create mode 100644 arch/x86/platform/geode/geos.c diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5bed94e189fa..3a38c4c1d359 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2133,6 +2133,13 @@ config ALIX Note: You have to set alix.force=1 for boards with Award BIOS. +config GEOS + bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)" + select GPIOLIB + depends on DMI + ---help--- + This option enables system support for the Traverse Technologies GEOS. + endif # X86_32 config AMD_NB diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile index 07c9cd05021a..d8ba5644f2f6 100644 --- a/arch/x86/platform/geode/Makefile +++ b/arch/x86/platform/geode/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_ALIX) += alix.o +obj-$(CONFIG_GEOS) += geos.o diff --git a/arch/x86/platform/geode/geos.c b/arch/x86/platform/geode/geos.c new file mode 100644 index 000000000000..c2e6d53558be --- /dev/null +++ b/arch/x86/platform/geode/geos.c @@ -0,0 +1,128 @@ +/* + * System Specific setup for Traverse Technologies GEOS. + * At the moment this means setup of GPIO control of LEDs. + * + * Copyright (C) 2008 Constantin Baranov + * Copyright (C) 2011 Ed Wildgoose + * and Philip Prindeville + * + * TODO: There are large similarities with leds-net5501.c + * by Alessandro Zummo + * In the future leds-net5501.c should be migrated over to platform + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct gpio_keys_button geos_gpio_buttons[] = { + { + .code = KEY_RESTART, + .gpio = 3, + .active_low = 1, + .desc = "Reset button", + .type = EV_KEY, + .wakeup = 0, + .debounce_interval = 100, + .can_disable = 0, + } +}; +static struct gpio_keys_platform_data geos_buttons_data = { + .buttons = geos_gpio_buttons, + .nbuttons = ARRAY_SIZE(geos_gpio_buttons), + .poll_interval = 20, +}; + +static struct platform_device geos_buttons_dev = { + .name = "gpio-keys-polled", + .id = 1, + .dev = { + .platform_data = &geos_buttons_data, + } +}; + +static struct gpio_led geos_leds[] = { + { + .name = "geos:1", + .gpio = 6, + .default_trigger = "default-on", + .active_low = 1, + }, + { + .name = "geos:2", + .gpio = 25, + .default_trigger = "default-off", + .active_low = 1, + }, + { + .name = "geos:3", + .gpio = 27, + .default_trigger = "default-off", + .active_low = 1, + }, +}; + +static struct gpio_led_platform_data geos_leds_data = { + .num_leds = ARRAY_SIZE(geos_leds), + .leds = geos_leds, +}; + +static struct platform_device geos_leds_dev = { + .name = "leds-gpio", + .id = -1, + .dev.platform_data = &geos_leds_data, +}; + +static struct __initdata platform_device *geos_devs[] = { + &geos_buttons_dev, + &geos_leds_dev, +}; + +static void __init register_geos(void) +{ + /* Setup LED control through leds-gpio driver */ + platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs)); +} + +static int __init geos_init(void) +{ + const char *vendor, *product; + + if (!is_geode()) + return 0; + + vendor = dmi_get_system_info(DMI_SYS_VENDOR); + if (!vendor || strcmp(vendor, "Traverse Technologies")) + return 0; + + product = dmi_get_system_info(DMI_PRODUCT_NAME); + if (!product || strcmp(product, "Geos")) + return 0; + + printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n", + KBUILD_MODNAME, vendor, product); + + register_geos(); + + return 0; +} + +module_init(geos_init); + +MODULE_AUTHOR("Philip Prindeville "); +MODULE_DESCRIPTION("Traverse Technologies Geos System Setup"); +MODULE_LICENSE("GPL");