From a95579cd4b40a4e062e187d931f498145551ee29 Mon Sep 17 00:00:00 2001 From: Alessandro Zummo Date: Mon, 27 Mar 2006 01:16:42 -0800 Subject: [PATCH] [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/Kconfig | 15 +++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-test.c | 204 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 220 insertions(+) create mode 100644 drivers/rtc/rtc-test.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 3de823f2f055..7eb1368d04f6 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -86,4 +86,19 @@ 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 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index eaf89b22db7a..d5ea0ed81905 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -12,4 +12,5 @@ obj-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o obj-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o +obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c new file mode 100644 index 000000000000..43d107487820 --- /dev/null +++ b/drivers/rtc/rtc-test.c @@ -0,0 +1,204 @@ +/* + * An RTC test device/driver + * Copyright (C) 2005 Tower Technologies + * Author: Alessandro Zummo + * + * 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 +#include +#include +#include + +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_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 "); +MODULE_DESCRIPTION("RTC test driver/device"); +MODULE_LICENSE("GPL"); + +module_init(test_init); +module_exit(test_exit); 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