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![Alessandro Zummo](/assets/img/avatar_default.png)
RTC drivers must not return an error after device registration. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Reported-by: Ales Novak <alnovak@suse.cz> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Srikanth Srinivasan <srikanth.srinivasan@freescale.com> Cc: Lee Jones <lee.jones@linaro.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
187 lines
4.1 KiB
C
187 lines
4.1 KiB
C
/*
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* An RTC test device/driver
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* Copyright (C) 2005 Tower Technologies
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/rtc.h>
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#include <linux/platform_device.h>
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static struct platform_device *test0 = NULL, *test1 = NULL;
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static int test_rtc_read_alarm(struct device *dev,
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struct rtc_wkalrm *alrm)
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{
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return 0;
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}
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static int test_rtc_set_alarm(struct device *dev,
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struct rtc_wkalrm *alrm)
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{
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return 0;
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}
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static int test_rtc_read_time(struct device *dev,
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struct rtc_time *tm)
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{
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rtc_time_to_tm(get_seconds(), tm);
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return 0;
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}
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static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
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{
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dev_info(dev, "%s, secs = %lu\n", __func__, secs);
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return 0;
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}
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static int test_rtc_proc(struct device *dev, struct seq_file *seq)
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{
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struct platform_device *plat_dev = to_platform_device(dev);
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seq_printf(seq, "test\t\t: yes\n");
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seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
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return 0;
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}
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static int test_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
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{
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return 0;
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}
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static const struct rtc_class_ops test_rtc_ops = {
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.proc = test_rtc_proc,
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.read_time = test_rtc_read_time,
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.read_alarm = test_rtc_read_alarm,
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.set_alarm = test_rtc_set_alarm,
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.set_mmss = test_rtc_set_mmss,
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.alarm_irq_enable = test_rtc_alarm_irq_enable,
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};
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static ssize_t test_irq_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", 42);
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}
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static ssize_t test_irq_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int retval;
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struct platform_device *plat_dev = to_platform_device(dev);
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struct rtc_device *rtc = platform_get_drvdata(plat_dev);
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retval = count;
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if (strncmp(buf, "tick", 4) == 0 && rtc->pie_enabled)
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rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
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else if (strncmp(buf, "alarm", 5) == 0) {
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struct rtc_wkalrm alrm;
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int err = rtc_read_alarm(rtc, &alrm);
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if (!err && alrm.enabled)
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rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
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} else if (strncmp(buf, "update", 6) == 0 && rtc->uie_rtctimer.enabled)
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rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
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else
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retval = -EINVAL;
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return retval;
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}
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static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
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static int test_probe(struct platform_device *plat_dev)
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{
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int err;
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struct rtc_device *rtc;
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rtc = devm_rtc_device_register(&plat_dev->dev, "test",
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&test_rtc_ops, THIS_MODULE);
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if (IS_ERR(rtc)) {
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return PTR_ERR(rtc);
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}
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err = device_create_file(&plat_dev->dev, &dev_attr_irq);
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if (err)
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dev_err(&plat_dev->dev, "Unable to create sysfs entry: %s\n",
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dev_attr_irq.attr.name);
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platform_set_drvdata(plat_dev, rtc);
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return 0;
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}
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static int test_remove(struct platform_device *plat_dev)
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{
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device_remove_file(&plat_dev->dev, &dev_attr_irq);
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return 0;
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}
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static struct platform_driver test_driver = {
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.probe = test_probe,
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.remove = test_remove,
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.driver = {
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.name = "rtc-test",
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.owner = THIS_MODULE,
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},
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};
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static int __init test_init(void)
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{
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int err;
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if ((err = platform_driver_register(&test_driver)))
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return err;
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if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
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err = -ENOMEM;
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goto exit_driver_unregister;
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}
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if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
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err = -ENOMEM;
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goto exit_put_test0;
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}
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if ((err = platform_device_add(test0)))
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goto exit_put_test1;
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if ((err = platform_device_add(test1)))
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goto exit_del_test0;
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return 0;
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exit_del_test0:
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platform_device_del(test0);
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exit_put_test1:
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platform_device_put(test1);
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exit_put_test0:
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platform_device_put(test0);
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exit_driver_unregister:
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platform_driver_unregister(&test_driver);
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return err;
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}
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static void __exit test_exit(void)
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{
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platform_device_unregister(test0);
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platform_device_unregister(test1);
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platform_driver_unregister(&test_driver);
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}
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MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
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MODULE_DESCRIPTION("RTC test driver/device");
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MODULE_LICENSE("GPL");
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module_init(test_init);
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module_exit(test_exit);
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