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    Subject[PATCH 08/11] RTC subsystem, test device/driver
    Interrupts can be generated by
    echo "alarm|tick|update" >/sys/class/rtc/rtcX/device/irq

    Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
    --

    drivers/rtc/Kconfig | 15 +++
    drivers/rtc/Makefile | 1
    drivers/rtc/rtc-test.c | 206 +++++++++++++++++++++++++++++++++++++++++++++++++
    3 files changed, 222 insertions(+)

    --- linux-rtc.orig/drivers/rtc/Kconfig 2006-02-13 19:35:30.000000000 +0100
    +++ linux-rtc/drivers/rtc/Kconfig 2006-02-13 19:39:51.000000000 +0100
    @@ -82,4 +82,19 @@ config RTC_DRV_X1205
    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-rtc.orig/drivers/rtc/Makefile 2006-02-13 19:35:30.000000000 +0100
    +++ linux-rtc/drivers/rtc/Makefile 2006-02-13 19:39:51.000000000 +0100
    @@ -11,4 +11,5 @@ obj-$(CONFIG_RTC_INTF_PROC) += rtc-proc.
    obj-$(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-rtc/drivers/rtc/rtc-test.c 2006-02-13 19:35:30.000000000 +0100
    @@ -0,0 +1,206 @@
    +/*
    + * 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 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/err.h>
    +#include <linux/rtc.h>
    +#include <linux/platform_device.h>
    +
    +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_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 = {
    + .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("test", &plat_dev->dev,
    + &test_rtc_ops, THIS_MODULE);
    + 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 __devexit 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 struct platform_driver test_drv = {
    + .probe = test_probe,
    + .remove = __devexit_p(test_remove),
    + .driver = {
    + .name = "rtc-test",
    + .owner = THIS_MODULE,
    + },
    +};
    +
    +static int __init test_init(void)
    +{
    + int err;
    +
    + if ((err = platform_driver_register(&test_drv)))
    + 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_free_test0;
    + }
    +
    + if ((err = platform_device_add(test0)))
    + goto exit_free_test1;
    +
    + if ((err = platform_device_add(test1)))
    + goto exit_device_unregister;
    +
    + return 0;
    +
    +exit_device_unregister:
    + platform_device_unregister(test0);
    +
    +exit_free_test1:
    + platform_device_put(test1);
    +
    +exit_free_test0:
    + platform_device_put(test0);
    +
    +exit_driver_unregister:
    + platform_driver_unregister(&test_drv);
    + return err;
    +}
    +
    +static void __exit test_exit(void)
    +{
    + platform_device_unregister(test0);
    + platform_device_unregister(test1);
    + platform_driver_unregister(&test_drv);
    +}
    +
    +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);
    --
    -
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