From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750756AbWCRRWX (ORCPT ); Sat, 18 Mar 2006 12:22:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750743AbWCRRWD (ORCPT ); Sat, 18 Mar 2006 12:22:03 -0500 Received: from 213-140-6-124.ip.fastwebnet.it ([213.140.6.124]:15349 "EHLO linux") by vger.kernel.org with ESMTP id S1750751AbWCRRV1 (ORCPT ); Sat, 18 Mar 2006 12:21:27 -0500 Message-Id: <20060318171949.853562000@towertech.it> References: <20060318171946.821316000@towertech.it> User-Agent: quilt/0.43-1 Date: Sat, 18 Mar 2006 18:20:02 +0100 From: Alessandro Zummo To: linux-kernel@vger.kernel.org Cc: akpm@zip.com.au Subject: [PATCH 16/18] RTC subsystem, EP93XX driver Content-Disposition: inline; filename=rtc-drv-ep93xx.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a driver for the RTC embedded in the Cirrus Logic EP93XX family of processors. Signed-off-by: Alessandro Zummo --- drivers/rtc/Kconfig | 11 +++ drivers/rtc/Makefile | 2 drivers/rtc/rtc-ep93xx.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 174 insertions(+), 1 deletion(-) --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-rtc/drivers/rtc/rtc-ep93xx.c 2006-03-13 03:31:29.000000000 +0100 @@ -0,0 +1,162 @@ +/* + * A driver for the RTC embedded in the Cirrus Logic EP93XX processors + * Copyright (c) 2006 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 + +#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x)) +#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000) +#define EP93XX_RTC_LOAD EP93XX_RTC_REG(0x000C) +#define EP93XX_RTC_SWCOMP EP93XX_RTC_REG(0x0108) + +#define DRV_VERSION "0.2" + +static int ep93xx_get_swcomp(struct device *dev, unsigned short *preload, + unsigned short *delete) +{ + unsigned short comp = __raw_readl(EP93XX_RTC_SWCOMP); + + if (preload) + *preload = comp & 0xffff; + + if (delete) + *delete = (comp >> 16) & 0x1f; + + return 0; +} + +static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + unsigned long time = __raw_readl(EP93XX_RTC_DATA); + + rtc_time_to_tm(time, tm); + return 0; +} + +static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs) +{ + __raw_writel(secs + 1, EP93XX_RTC_LOAD); + return 0; +} + +static int ep93xx_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + int err; + unsigned long secs; + + err = rtc_tm_to_time(tm, &secs); + if (err != 0) + return err; + + return ep93xx_rtc_set_mmss(dev, secs); +} + +static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq) +{ + unsigned short preload, delete; + + ep93xx_get_swcomp(dev, &preload, &delete); + + seq_printf(seq, "24hr\t\t: yes\n"); + seq_printf(seq, "preload\t\t: %d\n", preload); + seq_printf(seq, "delete\t\t: %d\n", delete); + + return 0; +} + +static struct rtc_class_ops ep93xx_rtc_ops = { + .read_time = ep93xx_rtc_read_time, + .set_time = ep93xx_rtc_set_time, + .set_mmss = ep93xx_rtc_set_mmss, + .proc = ep93xx_rtc_proc, +}; + +static ssize_t ep93xx_sysfs_show_comp_preload(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned short preload; + + ep93xx_get_swcomp(dev, &preload, NULL); + + return sprintf(buf, "%d\n", preload); +} +static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_sysfs_show_comp_preload, NULL); + +static ssize_t ep93xx_sysfs_show_comp_delete(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned short delete; + + ep93xx_get_swcomp(dev, NULL, &delete); + + return sprintf(buf, "%d\n", delete); +} +static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_sysfs_show_comp_delete, NULL); + + +static int __devinit ep93xx_rtc_probe(struct platform_device *dev) +{ + struct rtc_device *rtc = rtc_device_register("ep93xx", + &dev->dev, &ep93xx_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc)) { + dev_err(&dev->dev, "unable to register\n"); + return PTR_ERR(rtc); + } + + platform_set_drvdata(dev, rtc); + + device_create_file(&dev->dev, &dev_attr_comp_preload); + device_create_file(&dev->dev, &dev_attr_comp_delete); + + return 0; +} + +static int __devexit ep93xx_rtc_remove(struct platform_device *dev) +{ + struct rtc_device *rtc = platform_get_drvdata(dev); + + if (rtc) + rtc_device_unregister(rtc); + + platform_set_drvdata(dev, NULL); + + return 0; +} + +static struct platform_driver ep93xx_rtc_platform_driver = { + .driver = { + .name = "ep93xx-rtc", + .owner = THIS_MODULE, + }, + .probe = ep93xx_rtc_probe, + .remove = __devexit_p(ep93xx_rtc_remove), +}; + +static int __init ep93xx_rtc_init(void) +{ + return platform_driver_register(&ep93xx_rtc_platform_driver); +} + +static void __exit ep93xx_rtc_exit(void) +{ + platform_driver_unregister(&ep93xx_rtc_platform_driver); +} + +MODULE_AUTHOR("Alessandro Zummo "); +MODULE_DESCRIPTION("EP93XX RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +module_init(ep93xx_rtc_init); +module_exit(ep93xx_rtc_exit); --- linux-rtc.orig/drivers/rtc/Makefile 2006-03-13 03:28:53.000000000 +0100 +++ linux-rtc/drivers/rtc/Makefile 2006-03-13 03:30:50.000000000 +0100 @@ -16,4 +16,4 @@ obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o - +obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o --- linux-rtc.orig/drivers/rtc/Kconfig 2006-03-13 03:28:53.000000000 +0100 +++ linux-rtc/drivers/rtc/Kconfig 2006-03-13 03:30:50.000000000 +0100 @@ -117,6 +117,17 @@ config RTC_DRV_RS5C372 This driver can also be built as a module. If so, the module will be called rtc-rs5c372. +config RTC_DRV_EP93XX + tristate "Cirrus Logic EP93XX" + depends on RTC_CLASS && ARCH_EP93XX + help + If you say yes here you get support for the + RTC embedded in the Cirrus Logic EP93XX processors. + + This driver can also be built as a module. If so, the module + will be called rtc-ep93xx. + + config RTC_DRV_TEST tristate "Test driver/device" depends on RTC_CLASS --