1/* 2 * An RTC test device/driver 3 * Copyright (C) 2005 Tower Technologies 4 * Author: Alessandro Zummo <a.zummo@towertech.it> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/module.h> 12#include <linux/err.h> 13#include <linux/rtc.h> 14#include <linux/platform_device.h> 15 16static struct platform_device *test0 = NULL, *test1 = NULL; 17 18static int test_rtc_read_alarm(struct device *dev, 19 struct rtc_wkalrm *alrm) 20{ 21 return 0; 22} 23 24static int test_rtc_set_alarm(struct device *dev, 25 struct rtc_wkalrm *alrm) 26{ 27 return 0; 28} 29 30static int test_rtc_read_time(struct device *dev, 31 struct rtc_time *tm) 32{ 33 rtc_time_to_tm(get_seconds(), tm); 34 return 0; 35} 36 37static int test_rtc_set_mmss(struct device *dev, unsigned long secs) 38{ 39 dev_info(dev, "%s, secs = %lu\n", __func__, secs); 40 return 0; 41} 42 43static int test_rtc_proc(struct device *dev, struct seq_file *seq) 44{ 45 struct platform_device *plat_dev = to_platform_device(dev); 46 47 seq_printf(seq, "test\t\t: yes\n"); 48 seq_printf(seq, "id\t\t: %d\n", plat_dev->id); 49 50 return 0; 51} 52 53static int test_rtc_ioctl(struct device *dev, unsigned int cmd, 54 unsigned long arg) 55{ 56 /* We do support interrupts, they're generated 57 * using the sysfs interface. 58 */ 59 switch (cmd) { 60 case RTC_PIE_ON: 61 case RTC_PIE_OFF: 62 case RTC_UIE_ON: 63 case RTC_UIE_OFF: 64 case RTC_AIE_ON: 65 case RTC_AIE_OFF: 66 return 0; 67 68 default: 69 return -ENOIOCTLCMD; 70 } 71} 72 73static const struct rtc_class_ops test_rtc_ops = { 74 .proc = test_rtc_proc, 75 .read_time = test_rtc_read_time, 76 .read_alarm = test_rtc_read_alarm, 77 .set_alarm = test_rtc_set_alarm, 78 .set_mmss = test_rtc_set_mmss, 79 .ioctl = test_rtc_ioctl, 80}; 81 82static ssize_t test_irq_show(struct device *dev, 83 struct device_attribute *attr, char *buf) 84{ 85 return sprintf(buf, "%d\n", 42); 86} 87static ssize_t test_irq_store(struct device *dev, 88 struct device_attribute *attr, 89 const char *buf, size_t count) 90{ 91 int retval; 92 struct platform_device *plat_dev = to_platform_device(dev); 93 struct rtc_device *rtc = platform_get_drvdata(plat_dev); 94 95 retval = count; 96 if (strncmp(buf, "tick", 4) == 0) 97 rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF); 98 else if (strncmp(buf, "alarm", 5) == 0) 99 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); 100 else if (strncmp(buf, "update", 6) == 0) 101 rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF); 102 else 103 retval = -EINVAL; 104 105 return retval; 106} 107static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); 108 109static int test_probe(struct platform_device *plat_dev) 110{ 111 int err; 112 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev, 113 &test_rtc_ops, THIS_MODULE); 114 if (IS_ERR(rtc)) { 115 err = PTR_ERR(rtc); 116 return err; 117 } 118 119 err = device_create_file(&plat_dev->dev, &dev_attr_irq); 120 if (err) 121 goto err; 122 123 platform_set_drvdata(plat_dev, rtc); 124 125 return 0; 126 127err: 128 rtc_device_unregister(rtc); 129 return err; 130} 131 132static int __devexit test_remove(struct platform_device *plat_dev) 133{ 134 struct rtc_device *rtc = platform_get_drvdata(plat_dev); 135 136 rtc_device_unregister(rtc); 137 device_remove_file(&plat_dev->dev, &dev_attr_irq); 138 139 return 0; 140} 141 142static struct platform_driver test_driver = { 143 .probe = test_probe, 144 .remove = __devexit_p(test_remove), 145 .driver = { 146 .name = "rtc-test", 147 .owner = THIS_MODULE, 148 }, 149}; 150 151static int __init test_init(void) 152{ 153 int err; 154 155 if ((err = platform_driver_register(&test_driver))) 156 return err; 157 158 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) { 159 err = -ENOMEM; 160 goto exit_driver_unregister; 161 } 162 163 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) { 164 err = -ENOMEM; 165 goto exit_free_test0; 166 } 167 168 if ((err = platform_device_add(test0))) 169 goto exit_free_test1; 170 171 if ((err = platform_device_add(test1))) 172 goto exit_device_unregister; 173 174 return 0; 175 176exit_device_unregister: 177 platform_device_unregister(test0); 178 179exit_free_test1: 180 platform_device_put(test1); 181 182exit_free_test0: 183 platform_device_put(test0); 184 185exit_driver_unregister: 186 platform_driver_unregister(&test_driver); 187 return err; 188} 189 190static void __exit test_exit(void) 191{ 192 platform_device_unregister(test0); 193 platform_device_unregister(test1); 194 platform_driver_unregister(&test_driver); 195} 196 197MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); 198MODULE_DESCRIPTION("RTC test driver/device"); 199MODULE_LICENSE("GPL"); 200 201module_init(test_init); 202module_exit(test_exit); 203