[PATCH 3/4] geos: Platform driver for Geos and Geos2 single-board computers.

Philip Prindeville

2011-12-22 20:28:52 UTC

There are some issues with linux-geode not accepting messages with multiple
recipients so I'm having to forward these to the list... Please add back the
original recipients when replying.

==== Original message follows ===

From: Philip Prindeville <philipp at redfish-solutions.com>
Date: Sun, 18 Dec 2011 12:50:54 -0700
Subject: [PATCH 3/4] geos: Platform driver for Geos and Geos2 single-board computers.
To: Ed Wildgoose <ed at wildgooses.com>,
Andrew Morton <akpm at linux-foundation.org>,
linux-geode at lists.infradead.org,
Andres Salomon <dilinger at queued.net>
Cc: Nathan Williams <nathan at traverse.com.au>,
Guy Ellis <guy at traverse.com.au>,
David Woodhouse <dwmw2 at infradead.org>,
Patrick Georgi <patrick.georgi at secunet.com>,
Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>
linux-mm at kvack.org

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 <philipp at redfish-solutions.com>
Reviewed-by: Ed Wildgoose <ed at wildgooses.com>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Andres Salomon <dilinger at queued.net>
Cc: Nathan Williams <nathan at traverse.com.au>
Cc: Guy Ellis <guy at traverse.com.au>
Cc: David Woodhouse <dwmw2 at infradead.org>
Cc: Patrick Georgi <patrick.georgi at secunet.com>
Cc: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>
Cc: linux-geode at lists.infradead.org
Cc: Alessandro Zummo <a.zummo at towertech.it>
Cc: Constantin Baranov <const at mimas.ru>
---
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 <const at mimas.ru>
+ * Copyright (C) 2011 Ed Wildgoose <kernel at wildgooses.com>
+ * and Philip Prindeville <philipp at redfish-solutions.com>
+ *
+ * TODO: There are large similarities with leds-net5501.c
+ * by Alessandro Zummo <a.zummo at 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/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 <philipp at redfish-solutions.com>");
+MODULE_DESCRIPTION("Traverse Technologies Geos System Setup");
+MODULE_LICENSE("GPL");

--
1.7.7.4