[RFC][PATCH 7/7] RTC subsystem, test device/driver
From: Alessandro Zummo
Date: Mon Dec 26 2005 - 14:19:12 EST
This is a software RTC which can be
used to test the RTC subsystem APIs. It gets
the time from the system clock.
Interrupts can be generated by
echo "alarm|tick|update" >/sys/class/rtc/rtcX/device/irq
Signed-off-by: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
--
drivers/rtc/Kconfig | 15 +++
drivers/rtc/Makefile | 1
drivers/rtc/rtc-test.c | 196 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 212 insertions(+)
--- linux.orig/drivers/rtc/Kconfig 2005-12-26 19:33:46.000000000 +0100
+++ linux/drivers/rtc/Kconfig 2005-12-26 19:34:03.000000000 +0100
@@ -65,4 +65,19 @@
This driver can also be built as a module. If so, the module
will be called rtc-x1205.
+config RTC_DRV_TEST
+ tristate "Test driver/device"
+ depends on RTC_CLASS
+ help
+ If you say yes here you get support for the
+ RTC test driver. It's a software RTC which can be
+ used to test the RTC subsystem APIs. It gets
+ the time from the system clock.
+ You want this driver only if you are doing development
+ on the RTC subsystem. Please read the source code
+ for further details.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-test.
+
endmenu
--- linux.orig/drivers/rtc/Makefile 2005-12-26 19:33:46.000000000 +0100
+++ linux/drivers/rtc/Makefile 2005-12-26 19:34:03.000000000 +0100
@@ -10,4 +10,5 @@
obj-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
+obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux/drivers/rtc/rtc-test.c 2005-12-26 19:34:03.000000000 +0100
@@ -0,0 +1,196 @@
+/*
+ * An RTC test device/driver
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/string.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+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_time(struct device *dev,
+ struct rtc_time *tm)
+{
+ return 0;
+}
+
+static int test_rtc_set_mmss(struct device *dev, unsigned long 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, "24hr\t\t: yes\n");
+ 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_ioctl(struct device *dev, unsigned int cmd,
+ unsigned long arg)
+{
+ /* We do support interrupts, they're generated
+ * using the sysfs interface.
+ */
+ switch (cmd) {
+ case RTC_PIE_ON:
+ case RTC_PIE_OFF:
+ case RTC_UIE_ON:
+ case RTC_UIE_OFF:
+ case RTC_AIE_ON:
+ case RTC_AIE_OFF:
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct rtc_class_ops test_rtc_ops = {
+ .owner = THIS_MODULE,
+ .proc = test_rtc_proc,
+ .read_time = test_rtc_read_time,
+ .set_time = test_rtc_set_time,
+ .read_alarm = test_rtc_read_alarm,
+ .set_alarm = test_rtc_set_alarm,
+ .set_mmss = test_rtc_set_mmss,
+ .ioctl = test_rtc_ioctl,
+};
+
+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_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF);
+ else if (strncmp(buf, "alarm", 5) == 0)
+ rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF);
+ else if (strncmp(buf, "update", 6) == 0)
+ rtc_update_irq(&rtc->class_dev, 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_device_register(&plat_dev->dev,
+ &test_rtc_ops);
+ if (IS_ERR(rtc)) {
+ err = PTR_ERR(rtc);
+ dev_err(&plat_dev->dev,
+ "unable to register the class device\n");
+ return err;
+ }
+ device_create_file(&plat_dev->dev, &dev_attr_irq);
+
+ platform_set_drvdata(plat_dev, rtc);
+
+ return 0;
+}
+
+static int test_remove(struct platform_device *plat_dev)
+{
+ struct rtc_device *rtc = platform_get_drvdata(plat_dev);
+
+ rtc_device_unregister(rtc);
+ device_remove_file(&plat_dev->dev, &dev_attr_irq);
+
+ return 0;
+}
+
+static void test_release(struct device * dev)
+{
+}
+
+struct platform_device test_dev_zero = {
+ .name = "rtc-test",
+ .id = 0,
+ .dev.release = test_release,
+};
+
+struct platform_device test_dev_one = {
+ .name = "rtc-test",
+ .id = 1,
+ .dev.release = test_release,
+};
+
+struct platform_driver test_drv = {
+ .probe = test_probe,
+ .remove = test_remove,
+ .driver = {
+ .name = "rtc-test",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init test_init(void)
+{
+ platform_device_register(&test_dev_zero);
+ platform_device_register(&test_dev_one);
+ platform_driver_register(&test_drv);
+
+ return 0;
+}
+
+static void __exit test_exit(void)
+{
+ platform_driver_unregister(&test_drv);
+ platform_device_unregister(&test_dev_zero);
+ platform_device_unregister(&test_dev_one);
+}
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("RTC test driver/device");
+MODULE_LICENSE("GPL");
+
+module_init(test_init);
+module_exit(test_exit);
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