rtc-test.rar_V2

/* * An RTC test device/driver * Copyright (C) 2005 Tower Technologies * Author: 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/module.h> #include <linux/err.h> #include <linux/rtc.h> #include <linux/platform_device.h> static struct platform_device *test0 = NULL, *test1 = NULL; static int test_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { return 0; } static int test_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { return 0; } static int test_rtc_read_time(struct device *dev, struct rtc_time *tm) { rtc_time_to_tm(get_seconds(), tm); return 0; } static int test_rtc_set_mmss(struct device *dev, unsigned long secs) { dev_info(dev, "%s, secs = %lu\n", __func__, secs); return 0; } static int test_rtc_proc(struct device *dev, struct seq_file *seq) { struct platform_device *plat_dev = to_platform_device(dev); seq_printf(seq, "test\t\t: yes\n"); seq_printf(seq, "id\t\t: %d\n", plat_dev->id); return 0; } static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) { return 0; } static const struct rtc_class_ops test_rtc_ops = { .proc = test_rtc_proc, .read_time = test_rtc_read_time, .read_alarm = test_rtc_read_alarm, .set_alarm = test_rtc_set_alarm, .set_mmss = test_rtc_set_mmss, .alarm_irq_enable = test_rtc_alarm_irq_enable, }; static ssize_t test_irq_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", 42); } static ssize_t test_irq_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int retval; struct platform_device *plat_dev = to_platform_device(dev); struct rtc_device *rtc = platform_get_drvdata(plat_dev); retval = count; if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled) rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF); else if (strncmp(buf, "alarm", 5) == 0) { struct rtc_wkalrm alrm; int err = rtc_read_alarm(rtc, &alrm); if (!err && alrm.enabled) rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF); } else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled) rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF); else retval = -EINVAL; return retval; } static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store); static int test_probe(struct platform_device *plat_dev) { int err; struct rtc_device *rtc; rtc = devm_rtc_device_register(&plat_dev->dev, "test", &test_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { return PTR_ERR(rtc); } err = device_create_file(&plat_dev->dev, &dev_attr_irq); if (err) dev_err(&plat_dev->dev, "Unable to create sysfs entry: %s\n", dev_attr_irq.attr.name); platform_set_drvdata(plat_dev, rtc); return 0; } static int test_remove(struct platform_device *plat_dev) { device_remove_file(&plat_dev->dev, &dev_attr_irq); return 0; } static struct platform_driver test_driver = { .probe = test_probe, .remove = test_remove, .driver = { .name = "rtc-test", }, }; static int __init test_init(void) { int err; if ((err = platform_driver_register(&test_driver))) return err; if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) { err = -ENOMEM; goto exit_driver_unregister; } if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) { err = -ENOMEM; goto exit_put_test0; } if ((err = platform_device_add(test0))) goto exit_put_test1; if ((err = platform_device_add(test1))) goto exit_del_test0; return 0; exit_del_test0: platform_device_del(test0); exit_put_test1: platform_device_put(test1); exit_put_test0: platform_device_put(test0); exit_driver_unregister: platform_driver_unregister(&test_driver); return err; } static void __exit test_exit(void) { platform_device_unregister(test0); platform_device_unregister(test1); platform_driver_unregister(&test_driver); } MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); MODULE_DESCRIPTION("RTC test driver/device"); MODULE_LICENSE("GPL"); module_init(test_init); module_exit(test_exit);