From: Philip Prindeville <[email protected]> Trivial platform driver for Traverse Technologies Geos and Geos2 single-board computers. Uses Coreboot BIOS 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 <[email protected]> Reviewed-by: Ed Wildgoose <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andres Salomon <[email protected]> Cc: Nathan Williams <[email protected]> Cc: Guy Ellis <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Patrick Georgi <[email protected]> Cc: Carl-Daniel Hailfinger <[email protected]> Cc: [email protected] Cc: Alessandro Zummo <[email protected]> Cc: Constantin Baranov <[email protected]> --- arch/x86/Kconfig | 7 ++ arch/x86/platform/geode/Makefile | 1 + arch/x86/platform/geode/geos.c | 127 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 135 insertions(+), 0 deletions(-) create mode 100644 arch/x86/platform/geode/geos.c diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9f195f1..de8e783 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2161,6 +2161,13 @@ 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 + select COREBOOT + ---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 07c9cd0..d8ba564 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 0000000..68106a5 --- /dev/null +++ b/arch/x86/platform/geode/geos.c @@ -0,0 +1,127 @@ +/* + * System Specific setup for Traverse Technologies GEOS. + * At the moment this means setup of GPIO control of LEDs. + * + * Copyright (C) 2008 Constantin Baranov <[email protected]> + * Copyright (C) 2011 Ed Wildgoose <[email protected]> + * and Philip Prindeville <[email protected]> + * + * TODO: There are large similarities with leds-net5501.c + * by Alessandro Zummo <[email protected]> + * 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 <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/string.h> +#include <linux/module.h> +#include <linux/leds.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/input.h> +#include <linux/gpio_keys.h> +#include <linux/mm.h> + +#include <asm/geode.h> +#include <linux/coreboot.h> + +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, *model; + + if (!is_geode() || !coreboot_init()) + return 0; + + vendor = coreboot_vendor(); + model = coreboot_part(); + + if (strcmp(vendor, "Traverse Technologies") + || strcmp(model, "Geos")) + return 0; + + printk(KERN_INFO "geos: board %s %s\n", vendor, model); + + register_geos(); + + return 0; +} + +module_init(geos_init); + +MODULE_AUTHOR("Philip Prindeville <[email protected]>"); +MODULE_DESCRIPTION("Traverse Technologies Geos System Setup"); +MODULE_LICENSE("GPL"); -- 1.7.7.4 _______________________________________________ Linux-geode mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-geode
