Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932090AbVLTUui (ORCPT ); Tue, 20 Dec 2005 15:50:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932093AbVLTUui (ORCPT ); Tue, 20 Dec 2005 15:50:38 -0500 Received: from jack.kinetikon.it ([62.152.125.81]:4332 "EHLO mail.towertech.it") by vger.kernel.org with ESMTP id S932090AbVLTUuh (ORCPT ); Tue, 20 Dec 2005 15:50:37 -0500 Date: Tue, 20 Dec 2005 21:48:01 +0100 From: Alessandro Zummo To: linux-kernel@vger.kernel.org Subject: [RFC][PATCH 4/6] RTC subsystem, proc interface Message-ID: <20051220214801.0f4cee7f@inspiron> Organization: Tower Technologies X-Mailer: Sylpheed Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5269 Lines: 180 This patch adds the proc interface to the RTC subsystem. The first RTC driver which registers with the class will be accessible by /proc/driver/rtc . Signed-off-by: Alessandro Zummo -- drivers/rtc/Kconfig | 11 ++++ drivers/rtc/Makefile | 1 drivers/rtc/rtc-proc.c | 132 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 144 insertions(+) --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-nslu2/drivers/rtc/rtc-proc.c 2005-12-20 20:38:50.000000000 +0100 @@ -0,0 +1,132 @@ +/* + * rtc-proc.c - rtc subsystem, proc interface + * + * Copyright (C) 2005 Tower Technologies + * Author: Alessandro Zummo + * + * based on arch/arm/common/rtctime.c + * + * 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 +#include +#include + +static struct class_device *rtc_dev = NULL; +static DECLARE_MUTEX(rtc_sem); + +static int rtc_proc_read(char *page, char **start, off_t off, int count, int *eof, void *data) +{ + struct class_device *class_dev = data; + struct rtc_class_ops *ops = class_get_devdata(class_dev); + struct rtc_wkalrm alrm; + struct rtc_time tm; + char *p = page; + + if (!try_module_get(ops->owner)) + return -ENODEV; + + if (rtc_read_time(class_dev, &tm) == 0) { + p += sprintf(p, + "rtc_time\t: %02d:%02d:%02d\n" + "rtc_date\t: %04d-%02d-%02d\n", + tm.tm_hour, tm.tm_min, tm.tm_sec, + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); + } + + if (rtc_read_alarm(class_dev, &alrm) == 0) { + p += sprintf(p, "alrm_time\t: "); + if ((unsigned int)alrm.time.tm_hour <= 24) + p += sprintf(p, "%02d:", alrm.time.tm_hour); + else + p += sprintf(p, "**:"); + if ((unsigned int)alrm.time.tm_min <= 59) + p += sprintf(p, "%02d:", alrm.time.tm_min); + else + p += sprintf(p, "**:"); + if ((unsigned int)alrm.time.tm_sec <= 59) + p += sprintf(p, "%02d\n", alrm.time.tm_sec); + else + p += sprintf(p, "**\n"); + + p += sprintf(p, "alrm_date\t: "); + if ((unsigned int)alrm.time.tm_year <= 200) + p += sprintf(p, "%04d-", alrm.time.tm_year + 1900); + else + p += sprintf(p, "****-"); + if ((unsigned int)alrm.time.tm_mon <= 11) + p += sprintf(p, "%02d-", alrm.time.tm_mon + 1); + else + p += sprintf(p, "**-"); + if ((unsigned int)alrm.time.tm_mday <= 31) + p += sprintf(p, "%02d\n", alrm.time.tm_mday); + else + p += sprintf(p, "**\n"); + p += sprintf(p, "alrm_wakeup\t: %s\n", + alrm.enabled ? "yes" : "no"); + p += sprintf(p, "alrm_pending\t: %s\n", + alrm.pending ? "yes" : "no"); + } + + if (ops->proc) + p += ops->proc(class_dev->dev, p); + + module_put(ops->owner); + + return p - page; +} + +static int rtc_proc_add_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + down(&rtc_sem); + if (rtc_dev == NULL) { + rtc_dev = class_dev; + + if (create_proc_read_entry("driver/rtc", 0, NULL, rtc_proc_read, + class_dev)) + dev_info(class_dev->dev, "rtc intf: proc\n"); + else + rtc_dev = NULL; + } + up(&rtc_sem); + + return 0; +} + +static void rtc_proc_remove_device(struct class_device *class_dev, + struct class_interface *class_intf) +{ + down(&rtc_sem); + if (rtc_dev == class_dev) { + remove_proc_entry("driver/rtc", NULL); + rtc_dev = NULL; + } + up(&rtc_sem); +} + +struct class_interface rtc_proc_interface = { + .add = &rtc_proc_add_device, + .remove = &rtc_proc_remove_device, +}; + +static int __init rtc_proc_init(void) +{ + return rtc_interface_register(&rtc_proc_interface); +} + +static void __exit rtc_proc_exit(void) +{ + class_interface_unregister(&rtc_proc_interface); +} + +module_init(rtc_proc_init); +module_exit(rtc_proc_exit); + +MODULE_AUTHOR("Alessandro Zummo "); +MODULE_DESCRIPTION("RTC class proc interface"); +MODULE_LICENSE("GPL"); --- linux-nslu2.orig/drivers/rtc/Kconfig 2005-12-20 20:37:42.000000000 +0100 +++ linux-nslu2/drivers/rtc/Kconfig 2005-12-20 20:38:50.000000000 +0100 @@ -30,6 +30,17 @@ config RTC_INTF_SYSFS This driver can also be built as a module. If so, the module will be called rtc-sysfs. +config RTC_INTF_PROC + tristate "proc" + depends on RTC_CLASS && PROC_FS + default RTC_CLASS + help + Say yes here if you want to use your RTC using the proc + interface, /proc/driver/rtc . + + This driver can also be built as a module. If so, the module + will be called rtc-proc. + comment "RTC drivers" depends on RTC_CLASS --- linux-nslu2.orig/drivers/rtc/Makefile 2005-12-20 20:37:42.000000000 +0100 +++ linux-nslu2/drivers/rtc/Makefile 2005-12-20 20:39:16.000000000 +0100 @@ -7,3 +7,4 @@ obj-$(CONFIG_RTC_CLASS) += rtc-core.o rtc-core-y := class.o intf.o rtc-core-objs := $(rtc-core-y) obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o +obj-$(CONFIG_RTC_INTF_PROC) += rtc-proc.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/