lkml.org 
[lkml]   [2012]   [Jan]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/1] net5501: platform driver for Soekris Engineering net5501 single-board computer
Date
From: "Philip A. Prindeville" <philipp@redfish-solutions.com>

Andrew: this is from the console when booting 3.2.1:

[ 0.308194] platform rtc_cmos: registered platform RTC device (no PNP device
found)
[ 0.325158] net5501: system is recognized as "net5501"
[ 0.375991] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.390948] JFFS2 version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY
) (c) 2001-2006 Red Hat, Inc.
[ 0.400301] msgmni has been set to 500
[ 0.412818] io scheduler noop registered
[ 0.416325] io scheduler deadline registered (default)

so the driver seems to be working as expected.

---
Trivial platform driver for Soekris Engineering net5501 single-board
computer. Probes well-known locations in ROM for BIOS signature to
confirm correct platform. Registers 1 LED and 1 GPIO-based button
(typically used for soft reset).

Changes in v2 per Andrew:
Bug out early if ioremap() fails.
Elevate warning message for ioremap() failure to KERN_ERR.
Remove duplicated calls to is_geode() and net5501_register().

Other changes in v2:
Prefix printk() messages with KBUILD_MODNAME.
Add missing <linux/module.h> #include.
Add missing newline to ioremap() error message.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Andres Salomon <dilinger@queued.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
---
arch/x86/Kconfig | 6 ++
arch/x86/platform/geode/Makefile | 1 +
arch/x86/platform/geode/net5501.c | 154 +++++++++++++++++++++++++++++++++++++
drivers/leds/leds-net5501.c | 97 -----------------------
4 files changed, 161 insertions(+), 97 deletions(-)
create mode 100644 arch/x86/platform/geode/net5501.c
delete mode 100644 drivers/leds/leds-net5501.c

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2f18a15..7a4f34b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2174,6 +2174,12 @@ config GEOS
---help---
This option enables system support for the Traverse Technologies GEOS.

+config NET5501
+ bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)"
+ select GPIOLIB
+ ---help---
+ This option enables system support for the Soekris Engineering net5501.
+
endif # X86_32

config AMD_NB
diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile
index d8ba564..5b51194 100644
--- a/arch/x86/platform/geode/Makefile
+++ b/arch/x86/platform/geode/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_ALIX) += alix.o
+obj-$(CONFIG_NET5501) += net5501.o
obj-$(CONFIG_GEOS) += geos.o
diff --git a/arch/x86/platform/geode/net5501.c b/arch/x86/platform/geode/net5501.c
new file mode 100644
index 0000000..66d377e
--- /dev/null
+++ b/arch/x86/platform/geode/net5501.c
@@ -0,0 +1,154 @@
+/*
+ * System Specific setup for Soekris net5501
+ * At the moment this means setup of GPIO control of LEDs and buttons
+ * on net5501 boards.
+ *
+ *
+ * Copyright (C) 2008-2009 Tower Technologies
+ * Written by Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
+ * and Philip Prindeville <philipp@redfish-solutions.com>
+ *
+ * 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 <asm/geode.h>
+
+#define BIOS_REGION_BASE 0xffff0000
+#define BIOS_REGION_SIZE 0x00010000
+
+static struct gpio_keys_button net5501_gpio_buttons[] = {
+ {
+ .code = KEY_RESTART,
+ .gpio = 24,
+ .active_low = 1,
+ .desc = "Reset button",
+ .type = EV_KEY,
+ .wakeup = 0,
+ .debounce_interval = 100,
+ .can_disable = 0,
+ }
+};
+static struct gpio_keys_platform_data net5501_buttons_data = {
+ .buttons = net5501_gpio_buttons,
+ .nbuttons = ARRAY_SIZE(net5501_gpio_buttons),
+ .poll_interval = 20,
+};
+
+static struct platform_device net5501_buttons_dev = {
+ .name = "gpio-keys-polled",
+ .id = 1,
+ .dev = {
+ .platform_data = &net5501_buttons_data,
+ }
+};
+
+static struct gpio_led net5501_leds[] = {
+ {
+ .name = "net5501:1",
+ .gpio = 6,
+ .default_trigger = "default-on",
+ .active_low = 1,
+ },
+};
+
+static struct gpio_led_platform_data net5501_leds_data = {
+ .num_leds = ARRAY_SIZE(net5501_leds),
+ .leds = net5501_leds,
+};
+
+static struct platform_device net5501_leds_dev = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &net5501_leds_data,
+};
+
+static struct __initdata platform_device *net5501_devs[] = {
+ &net5501_buttons_dev,
+ &net5501_leds_dev,
+};
+
+static void __init register_net5501(void)
+{
+ /* Setup LED control through leds-gpio driver */
+ platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
+}
+
+struct net5501_board {
+ u16 offset;
+ u16 len;
+ char *sig;
+};
+
+static struct net5501_board __initdata boards[] = {
+ { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
+ { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
+};
+
+static bool __init net5501_present(void)
+{
+ int i;
+ unsigned char *rombase, *bios;
+ bool found = false;
+
+ rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
+ if (!rombase) {
+ printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
+ return found;
+ }
+
+ bios = rombase + 0x20; /* null terminated */
+
+ if (memcmp(bios, "comBIOS", 7))
+ goto unmap;
+
+ for (i = 0; i < ARRAY_SIZE(boards); i++) {
+ unsigned char *model = rombase + boards[i].offset;
+
+ if (!memcmp(model, boards[i].sig, boards[i].len)) {
+ printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
+ KBUILD_MODNAME, model);
+
+ found = true;
+ break;
+ }
+ }
+
+unmap:
+ iounmap(rombase);
+ return found;
+}
+
+static int __init net5501_init(void)
+{
+ if (!is_geode())
+ return 0;
+
+ if (!net5501_present())
+ return 0;
+
+ register_net5501();
+
+ return 0;
+}
+
+module_init(net5501_init);
+
+MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
+MODULE_DESCRIPTION("Soekris net5501 System Setup");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-net5501.c b/drivers/leds/leds-net5501.c
deleted file mode 100644
index 0555d47..0000000
--- a/drivers/leds/leds-net5501.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Soekris board support code
- *
- * Copyright (C) 2008-2009 Tower Technologies
- * Written by Alessandro Zummo <a.zummo@towertech.it>
- *
- * 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/leds.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-
-#include <asm/geode.h>
-
-static const struct gpio_led net5501_leds[] = {
- {
- .name = "error",
- .gpio = 6,
- .default_trigger = "default-on",
- },
-};
-
-static struct gpio_led_platform_data net5501_leds_data = {
- .num_leds = ARRAY_SIZE(net5501_leds),
- .leds = net5501_leds,
-};
-
-static struct platform_device net5501_leds_dev = {
- .name = "leds-gpio",
- .id = -1,
- .dev.platform_data = &net5501_leds_data,
-};
-
-static void __init init_net5501(void)
-{
- platform_device_register(&net5501_leds_dev);
-}
-
-struct soekris_board {
- u16 offset;
- char *sig;
- u8 len;
- void (*init)(void);
-};
-
-static struct soekris_board __initdata boards[] = {
- { 0xb7b, "net5501", 7, init_net5501 }, /* net5501 v1.33/1.33c */
- { 0xb1f, "net5501", 7, init_net5501 }, /* net5501 v1.32i */
-};
-
-static int __init soekris_init(void)
-{
- int i;
- unsigned char *rombase, *bios;
-
- if (!is_geode())
- return 0;
-
- rombase = ioremap(0xffff0000, 0xffff);
- if (!rombase) {
- printk(KERN_INFO "Soekris net5501 LED driver failed to get rombase");
- return 0;
- }
-
- bios = rombase + 0x20; /* null terminated */
-
- if (strncmp(bios, "comBIOS", 7))
- goto unmap;
-
- for (i = 0; i < ARRAY_SIZE(boards); i++) {
- unsigned char *model = rombase + boards[i].offset;
-
- if (strncmp(model, boards[i].sig, boards[i].len) == 0) {
- printk(KERN_INFO "Soekris %s: %s\n", model, bios);
-
- if (boards[i].init)
- boards[i].init();
- break;
- }
- }
-
-unmap:
- iounmap(rombase);
- return 0;
-}
-
-arch_initcall(soekris_init);
-
-MODULE_LICENSE("GPL");
--
1.7.7.5


\
 
 \ /
  Last update: 2012-01-28 06:05    [W:0.735 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site