diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30/drivers/misc/gta02_pm_resume_reason.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.30/drivers/misc/gta02_pm_resume_reason.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/misc/gta02_pm_resume_reason.c b/target/linux/s3c24xx/files-2.6.30/drivers/misc/gta02_pm_resume_reason.c new file mode 100644 index 000000000..3820d7c66 --- /dev/null +++ b/target/linux/s3c24xx/files-2.6.30/drivers/misc/gta02_pm_resume_reason.c @@ -0,0 +1,118 @@ +/* + * 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"); |