1/* 2 * Resume reason sysfs for the Openmoko Freerunner GSM Phone 3 * 4 * (C) 2008 by Openmoko Inc. 5 * Author: Andy Green <andy@openmoko.com> 6 * All rights reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License resume_reason 2 as 10 * published by the Free Software Foundation 11 * 12 */ 13 14#include <linux/module.h> 15#include <linux/init.h> 16#include <linux/kernel.h> 17#include <linux/platform_device.h> 18#include <linux/io.h> 19 20#include <mach/regs-gpio.h> 21 22static unsigned int *gstatus4_mapped; 23static char *resume_reasons[17] = { 24 "EINT00_ACCEL1", 25 "EINT01_GSM", 26 "EINT02_BLUETOOTH", 27 "EINT03_DEBUGBRD", 28 "EINT04_JACK", 29 "EINT05_WLAN", 30 "EINT06_AUXKEY", 31 "EINT07_HOLDKEY", 32 "EINT08_ACCEL2", 33 "EINT09_PMU", 34 "EINT10_NULL", 35 "EINT11_NULL", 36 "EINT12_GLAMO", 37 "EINT13_NULL", 38 "EINT14_NULL", 39 "EINT15_NULL", 40 NULL 41}; 42 43static ssize_t resume_reason_read(struct device *dev, 44 struct device_attribute *attr, 45 char *buf) 46{ 47 int bit = 0; 48 char *end = buf; 49 50 for (bit = 0; resume_reasons[bit]; bit++) { 51 if ((*gstatus4_mapped) & (1 << bit)) 52 end += sprintf(end, "* %s\n", resume_reasons[bit]); 53 else 54 end += sprintf(end, " %s\n", resume_reasons[bit]); 55 56 } 57 58 return end - buf; 59} 60 61 62static DEVICE_ATTR(resume_reason, 0644, resume_reason_read, NULL); 63 64static struct attribute *gta02_resume_reason_sysfs_entries[] = { 65 &dev_attr_resume_reason.attr, 66 NULL 67}; 68 69static struct attribute_group gta02_resume_reason_attr_group = { 70 .name = NULL, 71 .attrs = gta02_resume_reason_sysfs_entries, 72}; 73 74static int __init gta02_resume_reason_probe(struct platform_device *pdev) 75{ 76 dev_info(&pdev->dev, "starting\n"); 77 78 gstatus4_mapped = ioremap(S3C24XX_GSTATUS4, 0x4); 79 if (!gstatus4_mapped) { 80 dev_err(&pdev->dev, "failed to ioremap() memory region\n"); 81 return -EINVAL; 82 } 83 84 return sysfs_create_group(&pdev->dev.kobj, 85 >a02_resume_reason_attr_group); 86} 87 88static int gta02_resume_reason_remove(struct platform_device *pdev) 89{ 90 sysfs_remove_group(&pdev->dev.kobj, >a02_resume_reason_attr_group); 91 iounmap(gstatus4_mapped); 92 return 0; 93} 94 95static struct platform_driver gta02_resume_reason_driver = { 96 .probe = gta02_resume_reason_probe, 97 .remove = gta02_resume_reason_remove, 98 .driver = { 99 .name = "gta02-resume-reason", 100 }, 101}; 102 103static int __devinit gta02_resume_reason_init(void) 104{ 105 return platform_driver_register(>a02_resume_reason_driver); 106} 107 108static void gta02_resume_reason_exit(void) 109{ 110 platform_driver_unregister(>a02_resume_reason_driver); 111} 112 113module_init(gta02_resume_reason_init); 114module_exit(gta02_resume_reason_exit); 115 116MODULE_LICENSE("GPL"); 117MODULE_AUTHOR("Andy Green <andy@openmoko.com>"); 118MODULE_DESCRIPTION("GTA02 resume_reason"); 119