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path: root/drivers/rtc/rtc-test.c
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Diffstat (limited to 'drivers/rtc/rtc-test.c')
-rw-r--r--drivers/rtc/rtc-test.c201
1 files changed, 201 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
new file mode 100644
index 000000000..3a2da4c89
--- /dev/null
+++ b/drivers/rtc/rtc-test.c
@@ -0,0 +1,201 @@
+/*
+ * 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 int test_mmss64;
+module_param(test_mmss64, int, 0644);
+MODULE_PARM_DESC(test_mmss64, "Test struct rtc_class_ops.set_mmss64().");
+
+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_time64_to_tm(ktime_get_real_seconds(), tm);
+ return 0;
+}
+
+static int test_rtc_set_mmss64(struct device *dev, time64_t secs)
+{
+ dev_info(dev, "%s, secs = %lld\n", __func__, (long long)secs);
+ 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 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;
+
+ if (test_mmss64) {
+ test_rtc_ops.set_mmss64 = test_rtc_set_mmss64;
+ test_rtc_ops.set_mmss = NULL;
+ }
+
+ 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);