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 <philipp@redfish-solutions.com>
Reviewed-by: Ed Wildgoose <ed@wildgooses.com>
Acked-by: Andres Salomon <dilinger@queued.net>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5bed94e..3a38c4c 100644 (file)
--- 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 07c9cd0..d8ba564 100644 (file)
--- 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 (file)
index 0000000..c2e6d53
--- /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 <const@mimas.ru>
+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
+ *                and Philip Prindeville <philipp@redfish-solutions.com>
+ *
+ * TODO: There are large similarities with leds-net5501.c
+ * by Alessandro Zummo <a.zummo@towertech.it>
+ * 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/dmi.h>
+
+#include <asm/geode.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, *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 <philipp@redfish-solutions.com>");
+MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
+MODULE_LICENSE("GPL");