Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965064AbWAIArC (ORCPT ); Sun, 8 Jan 2006 19:47:02 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161261AbWAIAqk (ORCPT ); Sun, 8 Jan 2006 19:46:40 -0500 Received: from 213-140-6-124.ip.fastwebnet.it ([213.140.6.124]:64485 "EHLO linux") by vger.kernel.org with ESMTP id S965378AbWAIAqh (ORCPT ); Sun, 8 Jan 2006 19:46:37 -0500 Message-Id: <20060108231254.952993000@linux> References: <20060108231235.153748000@linux> Date: Mon, 09 Jan 2006 00:12:38 +0100 From: Alessandro Zummo To: linux-kernel@vger.kernel.org Subject: [PATCH 3/8] RTC subsystem, sysfs interface Content-Disposition: inline; filename=rtc-intf-sysfs.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5424 Lines: 184 This patch adds the sysfs interface to the RTC subsystem. Each RTC client will have his own entry under /sys/classs/rtc/rtcN . Within this entry some attributes are exported by the subsystem, like date and time. Signed-off-by: Alessandro Zummo -- drivers/rtc/Kconfig | 11 ++++ drivers/rtc/Makefile | 2 drivers/rtc/rtc-sysfs.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 141 insertions(+), 1 deletion(-) --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-nslu2/drivers/rtc/rtc-sysfs.c 2006-01-08 17:07:57.000000000 +0100 @@ -0,0 +1,129 @@ +/* + * RTC subsystem, sysfs interface + * + * 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 as published by + * the Free Software Foundation; version 2 of the License. +*/ + +#include +#include + +/* device attributes */ + +static ssize_t rtc_sysfs_show_name(struct class_device *dev, char *buf) +{ + return sprintf(buf, "%s\n", to_rtc_device(dev)->name); +} +static CLASS_DEVICE_ATTR(name, S_IRUGO, rtc_sysfs_show_name, NULL); + +static ssize_t rtc_sysfs_show_date(struct class_device *dev, char *buf) +{ + ssize_t retval = -ENODEV; + struct rtc_device *rtc = to_rtc_device(dev); + struct rtc_time tm; + + if ((retval = down_interruptible(&rtc->ops_lock))) + return retval; + + if (rtc->ops && ((retval = rtc_read_time(dev, &tm)) == 0)) { + retval = sprintf(buf, "%04d-%02d-%02d\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); + } + + up(&rtc->ops_lock); + + return retval; +} +static CLASS_DEVICE_ATTR(date, S_IRUGO, rtc_sysfs_show_date, NULL); + +static ssize_t rtc_sysfs_show_time(struct class_device *dev, char *buf) +{ + ssize_t retval = -ENODEV; + struct rtc_device *rtc = to_rtc_device(dev); + struct rtc_time tm; + + if ((retval = down_interruptible(&rtc->ops_lock))) + return retval; + + + if (rtc->ops && ((retval = rtc_read_time(dev, &tm)) == 0)) { + retval = sprintf(buf, "%02d:%02d:%02d\n", + tm.tm_hour, tm.tm_min, tm.tm_sec); + } + + up(&rtc->ops_lock); + + return retval; +} +static CLASS_DEVICE_ATTR(time, S_IRUGO, rtc_sysfs_show_time, NULL); + +static ssize_t rtc_sysfs_show_since_epoch(struct class_device *dev, char *buf) +{ + ssize_t retval = -ENODEV; + struct rtc_device *rtc = to_rtc_device(dev); + struct rtc_time tm; + + if ((retval = down_interruptible(&rtc->ops_lock))) + return retval; + + if (rtc->ops && ((retval = rtc_read_time(dev, &tm)) == 0)) { + unsigned long time; + rtc_tm_to_time(&tm, &time); + retval = sprintf(buf, "%lu\n", time); + } + + up(&rtc->ops_lock); + + return retval; +} +static CLASS_DEVICE_ATTR(since_epoch, S_IRUGO, rtc_sysfs_show_since_epoch, NULL); + +/* insertion/removal hooks */ + +static int __devinit rtc_sysfs_add_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + class_device_create_file(class_dev, &class_device_attr_name); + class_device_create_file(class_dev, &class_device_attr_date); + class_device_create_file(class_dev, &class_device_attr_time); + class_device_create_file(class_dev, &class_device_attr_since_epoch); + dev_info(class_dev->dev, "rtc intf: sysfs\n"); + return 0; +} + +static void rtc_sysfs_remove_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + class_device_remove_file(class_dev, &class_device_attr_name); + class_device_remove_file(class_dev, &class_device_attr_date); + class_device_remove_file(class_dev, &class_device_attr_time); + class_device_remove_file(class_dev, &class_device_attr_since_epoch); +} + +/* interface registration */ + +struct class_interface rtc_sysfs_interface = { + .add = &rtc_sysfs_add_device, + .remove = &rtc_sysfs_remove_device, +}; + +static int __init rtc_sysfs_init(void) +{ + return rtc_interface_register(&rtc_sysfs_interface); +} + +static void __exit rtc_sysfs_exit(void) +{ + class_interface_unregister(&rtc_sysfs_interface); +} + +module_init(rtc_sysfs_init); +module_exit(rtc_sysfs_exit); + +MODULE_AUTHOR("Alessandro Zummo "); +MODULE_DESCRIPTION("RTC class sysfs interface"); +MODULE_LICENSE("GPL"); --- linux-nslu2.orig/drivers/rtc/Kconfig 2006-01-08 17:02:53.000000000 +0100 +++ linux-nslu2/drivers/rtc/Kconfig 2006-01-08 18:54:50.000000000 +0100 @@ -19,6 +19,17 @@ config RTC_CLASS comment "RTC interfaces" depends on RTC_CLASS +config RTC_INTF_SYSFS + tristate "sysfs" + depends on RTC_CLASS && SYSFS + default RTC_CLASS + help + Say yes here if you want to use your RTC using the sysfs + interface, /sys/class/rtc/rtcX . + + This driver can also be built as a module. If so, the module + will be called rtc-sysfs. + comment "RTC drivers" depends on RTC_CLASS --- linux-nslu2.orig/drivers/rtc/Makefile 2006-01-08 17:02:53.000000000 +0100 +++ linux-nslu2/drivers/rtc/Makefile 2006-01-08 18:54:50.000000000 +0100 @@ -5,4 +5,4 @@ obj-y += utils.o obj-$(CONFIG_RTC_CLASS) += rtc-core.o rtc-core-y := class.o interface.o - +obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/