Root/target/linux/x86/patches-3.2/002-geos_platform.patch

1From 31bc84d45320dad2392384381ad4d818ab21087a Mon Sep 17 00:00:00 2001
2From: "Philip A. Prindeville" <philipp@redfish-solutions.com>
3Date: Wed, 18 Jan 2012 11:15:33 -0700
4Subject: [PATCH 1/1] geos: Platform driver for Geos and Geos2 single-board
5 computers.
6
7Trivial platform driver for Traverse Technologies Geos and Geos2
8single-board computers. Uses SMBIOS to identify platform.
9Based on progressive revisions of the leds-net5501 driver that
10was rewritten by Ed Wildgoose as a platform driver.
11
12Supports GPIO-based LEDs (3) and 1 polled button which is
13typically used for a soft reset.
14
15Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
16Reviewed-by: Ed Wildgoose <ed@wildgooses.com>
17Acked-by: Andres Salomon <dilinger@queued.net>
18Cc: Richard Purdie <rpurdie@rpsys.net>
19Cc: Andrew Morton <akpm@linux-foundation.org>
20---
21 arch/x86/Kconfig | 7 ++
22 arch/x86/platform/geode/Makefile | 1 +
23 arch/x86/platform/geode/geos.c | 128 ++++++++++++++++++++++++++++++++++++++
24 3 files changed, 136 insertions(+), 0 deletions(-)
25 create mode 100644 arch/x86/platform/geode/geos.c
26
27--- a/arch/x86/Kconfig
28+++ b/arch/x86/Kconfig
29@@ -2090,6 +2090,13 @@ config ALIX
30 
31       Note: You have to set alix.force=1 for boards with Award BIOS.
32 
33+config GEOS
34+ bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
35+ select GPIOLIB
36+ depends on DMI
37+ ---help---
38+ This option enables system support for the Traverse Technologies GEOS.
39+
40 endif # X86_32
41 
42 config AMD_NB
43--- a/arch/x86/platform/geode/Makefile
44+++ b/arch/x86/platform/geode/Makefile
45@@ -1 +1,2 @@
46 obj-$(CONFIG_ALIX) += alix.o
47+obj-$(CONFIG_GEOS) += geos.o
48--- /dev/null
49+++ b/arch/x86/platform/geode/geos.c
50@@ -0,0 +1,128 @@
51+/*
52+ * System Specific setup for Traverse Technologies GEOS.
53+ * At the moment this means setup of GPIO control of LEDs.
54+ *
55+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
56+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
57+ * and Philip Prindeville <philipp@redfish-solutions.com>
58+ *
59+ * TODO: There are large similarities with leds-net5501.c
60+ * by Alessandro Zummo <a.zummo@towertech.it>
61+ * In the future leds-net5501.c should be migrated over to platform
62+ *
63+ * This program is free software; you can redistribute it and/or modify
64+ * it under the terms of the GNU General Public License version 2
65+ * as published by the Free Software Foundation.
66+ */
67+
68+#include <linux/kernel.h>
69+#include <linux/init.h>
70+#include <linux/io.h>
71+#include <linux/string.h>
72+#include <linux/module.h>
73+#include <linux/leds.h>
74+#include <linux/platform_device.h>
75+#include <linux/gpio.h>
76+#include <linux/input.h>
77+#include <linux/gpio_keys.h>
78+#include <linux/dmi.h>
79+
80+#include <asm/geode.h>
81+
82+static struct gpio_keys_button geos_gpio_buttons[] = {
83+ {
84+ .code = KEY_RESTART,
85+ .gpio = 3,
86+ .active_low = 1,
87+ .desc = "Reset button",
88+ .type = EV_KEY,
89+ .wakeup = 0,
90+ .debounce_interval = 100,
91+ .can_disable = 0,
92+ }
93+};
94+static struct gpio_keys_platform_data geos_buttons_data = {
95+ .buttons = geos_gpio_buttons,
96+ .nbuttons = ARRAY_SIZE(geos_gpio_buttons),
97+ .poll_interval = 20,
98+};
99+
100+static struct platform_device geos_buttons_dev = {
101+ .name = "gpio-keys-polled",
102+ .id = 1,
103+ .dev = {
104+ .platform_data = &geos_buttons_data,
105+ }
106+};
107+
108+static struct gpio_led geos_leds[] = {
109+ {
110+ .name = "geos:1",
111+ .gpio = 6,
112+ .default_trigger = "default-on",
113+ .active_low = 1,
114+ },
115+ {
116+ .name = "geos:2",
117+ .gpio = 25,
118+ .default_trigger = "default-off",
119+ .active_low = 1,
120+ },
121+ {
122+ .name = "geos:3",
123+ .gpio = 27,
124+ .default_trigger = "default-off",
125+ .active_low = 1,
126+ },
127+};
128+
129+static struct gpio_led_platform_data geos_leds_data = {
130+ .num_leds = ARRAY_SIZE(geos_leds),
131+ .leds = geos_leds,
132+};
133+
134+static struct platform_device geos_leds_dev = {
135+ .name = "leds-gpio",
136+ .id = -1,
137+ .dev.platform_data = &geos_leds_data,
138+};
139+
140+static struct __initdata platform_device *geos_devs[] = {
141+ &geos_buttons_dev,
142+ &geos_leds_dev,
143+};
144+
145+static void __init register_geos(void)
146+{
147+ /* Setup LED control through leds-gpio driver */
148+ platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
149+}
150+
151+static int __init geos_init(void)
152+{
153+ const char *vendor, *product;
154+
155+ if (!is_geode())
156+ return 0;
157+
158+ vendor = dmi_get_system_info(DMI_SYS_VENDOR);
159+ if (!vendor || strcmp(vendor, "Traverse Technologies"))
160+ return 0;
161+
162+ product = dmi_get_system_info(DMI_PRODUCT_NAME);
163+ if (!product || strcmp(product, "Geos"))
164+ return 0;
165+
166+ printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
167+ KBUILD_MODNAME, vendor, product);
168+
169+ register_geos();
170+
171+ return 0;
172+}
173+
174+module_init(geos_init);
175+
176+MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
177+MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
178+MODULE_LICENSE("GPL");
179

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