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/*
* Resume reason sysfs for the Openmoko Freerunner GSM Phone
*
* (C) 2008 by Openmoko Inc.
* Author: Andy Green <andy@openmoko.com>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License resume_reason 2 as
* published by the Free Software Foundation
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/regs-gpio.h>
static unsigned int *gstatus4_mapped;
static char *resume_reasons[17] = {
"EINT00_ACCEL1",
"EINT01_GSM",
"EINT02_BLUETOOTH",
"EINT03_DEBUGBRD",
"EINT04_JACK",
"EINT05_WLAN",
"EINT06_AUXKEY",
"EINT07_HOLDKEY",
"EINT08_ACCEL2",
"EINT09_PMU",
"EINT10_NULL",
"EINT11_NULL",
"EINT12_GLAMO",
"EINT13_NULL",
"EINT14_NULL",
"EINT15_NULL",
NULL
};
static ssize_t resume_reason_read(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int bit = 0;
char *end = buf;
for (bit = 0; resume_reasons[bit]; bit++) {
if ((*gstatus4_mapped) & (1 << bit))
end += sprintf(end, "* %s\n", resume_reasons[bit]);
else
end += sprintf(end, " %s\n", resume_reasons[bit]);
}
return end - buf;
}
static DEVICE_ATTR(resume_reason, 0644, resume_reason_read, NULL);
static struct attribute *gta02_resume_reason_sysfs_entries[] = {
&dev_attr_resume_reason.attr,
NULL
};
static struct attribute_group gta02_resume_reason_attr_group = {
.name = NULL,
.attrs = gta02_resume_reason_sysfs_entries,
};
static int __init gta02_resume_reason_probe(struct platform_device *pdev)
{
dev_info(&pdev->dev, "starting\n");
gstatus4_mapped = ioremap(S3C24XX_GSTATUS4, 0x4);
if (!gstatus4_mapped) {
dev_err(&pdev->dev, "failed to ioremap() memory region\n");
return -EINVAL;
}
return sysfs_create_group(&pdev->dev.kobj,
>a02_resume_reason_attr_group);
}
static int gta02_resume_reason_remove(struct platform_device *pdev)
{
sysfs_remove_group(&pdev->dev.kobj, >a02_resume_reason_attr_group);
iounmap(gstatus4_mapped);
return 0;
}
static struct platform_driver gta02_resume_reason_driver = {
.probe = gta02_resume_reason_probe,
.remove = gta02_resume_reason_remove,
.driver = {
.name = "gta02-resume-reason",
},
};
static int __devinit gta02_resume_reason_init(void)
{
return platform_driver_register(>a02_resume_reason_driver);
}
static void gta02_resume_reason_exit(void)
{
platform_driver_unregister(>a02_resume_reason_driver);
}
module_init(gta02_resume_reason_init);
module_exit(gta02_resume_reason_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
MODULE_DESCRIPTION("GTA02 resume_reason");
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