rtc: rtc-ds1302 fixes
- removed spinlock protection, it's handled by the rtc class - use platform_driver_probe - return appropriate code for rtc_read_time - style issues Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Paul Mundt <lethal@linux-sh.org>hifive-unleashed-5.1
Alessandro Zummo
Paul Mundt
parent
307646c958
commit
2bfc3305f6
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@ -1,26 +1,25 @@
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/*
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* Dallas DS1302 RTC Support
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*
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* Copyright (C) 2002 David McCullough
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* Copyright (C) 2003 - 2007 Paul Mundt
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* Copyright (C) 2002 David McCullough
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* Copyright (C) 2003 - 2007 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License version 2. See the file "COPYING" in the main directory of
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* License version 2. See the file "COPYING" in the main directory of
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* this archive for more details.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/time.h>
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#include <linux/rtc.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/bcd.h>
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#include <asm/rtc.h>
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#define DRV_NAME "rtc-ds1302"
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#define DRV_VERSION "0.1.0"
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#define DRV_VERSION "0.1.1"
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#define RTC_CMD_READ 0x81 /* Read command */
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#define RTC_CMD_WRITE 0x80 /* Write command */
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@ -47,11 +46,6 @@
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#error "Add support for your platform"
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#endif
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struct ds1302_rtc {
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struct rtc_device *rtc_dev;
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spinlock_t lock;
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};
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static void ds1302_sendbits(unsigned int val)
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{
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int i;
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@ -105,8 +99,6 @@ static int ds1302_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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struct ds1302_rtc *rtc = dev_get_drvdata(dev);
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spin_lock_irq(&rtc->lock);
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tm->tm_sec = bcd2bin(ds1302_readbyte(RTC_ADDR_SEC));
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tm->tm_min = bcd2bin(ds1302_readbyte(RTC_ADDR_MIN));
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tm->tm_hour = bcd2bin(ds1302_readbyte(RTC_ADDR_HOUR));
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@ -118,26 +110,17 @@ static int ds1302_rtc_read_time(struct device *dev, struct rtc_time *tm)
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if (tm->tm_year < 70)
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tm->tm_year += 100;
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spin_unlock_irq(&rtc->lock);
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dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
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"mday=%d, mon=%d, year=%d, wday=%d\n",
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__func__,
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tm->tm_sec, tm->tm_min, tm->tm_hour,
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tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
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if (rtc_valid_tm(tm) < 0)
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dev_err(dev, "invalid date\n");
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return 0;
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return rtc_valid_tm(tm);
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}
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static int ds1302_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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struct ds1302_rtc *rtc = dev_get_drvdata(dev);
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spin_lock_irq(&rtc->lock);
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/* Stop RTC */
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ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) | 0x80);
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@ -152,8 +135,6 @@ static int ds1302_rtc_set_time(struct device *dev, struct rtc_time *tm)
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/* Start RTC */
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ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) & ~0x80);
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spin_unlock_irq(&rtc->lock);
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return 0;
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}
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@ -170,9 +151,7 @@ static int ds1302_rtc_ioctl(struct device *dev, unsigned int cmd,
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if (copy_from_user(&tcs_val, (int __user *)arg, sizeof(int)))
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return -EFAULT;
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spin_lock_irq(&rtc->lock);
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ds1302_writebyte(RTC_ADDR_TCR, (0xa0 | tcs_val * 0xf));
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spin_unlock_irq(&rtc->lock);
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return 0;
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}
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#endif
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@ -187,9 +166,9 @@ static struct rtc_class_ops ds1302_rtc_ops = {
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.ioctl = ds1302_rtc_ioctl,
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};
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static int __devinit ds1302_rtc_probe(struct platform_device *pdev)
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static int __init ds1302_rtc_probe(struct platform_device *pdev)
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{
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struct ds1302_rtc *rtc;
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struct rtc_device *rtc;
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int ret;
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/* Reset */
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@ -200,37 +179,23 @@ static int __devinit ds1302_rtc_probe(struct platform_device *pdev)
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if (ds1302_readbyte(RTC_ADDR_RAM0) != 0x42)
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return -ENODEV;
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rtc = kzalloc(sizeof(struct ds1302_rtc), GFP_KERNEL);
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if (unlikely(!rtc))
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return -ENOMEM;
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spin_lock_init(&rtc->lock);
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rtc->rtc_dev = rtc_device_register("ds1302", &pdev->dev,
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rtc = rtc_device_register("ds1302", &pdev->dev,
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&ds1302_rtc_ops, THIS_MODULE);
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if (IS_ERR(rtc->rtc_dev)) {
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ret = PTR_ERR(rtc->rtc_dev);
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goto out;
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}
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if (IS_ERR(rtc))
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return PTR_ERR(rtc);
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platform_set_drvdata(pdev, rtc);
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return 0;
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out:
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kfree(rtc);
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return ret;
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}
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static int __devexit ds1302_rtc_remove(struct platform_device *pdev)
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{
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struct ds1302_rtc *rtc = platform_get_drvdata(pdev);
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if (likely(rtc->rtc_dev))
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rtc_device_unregister(rtc->rtc_dev);
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struct rtc_device *rtc = platform_get_drvdata(pdev);
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rtc_device_unregister(rtc);
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platform_set_drvdata(pdev, NULL);
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kfree(rtc);
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return 0;
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}
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@ -239,13 +204,12 @@ static struct platform_driver ds1302_platform_driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = ds1302_rtc_probe,
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.remove = __devexit_p(ds1302_rtc_remove),
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.remove = __exit_p(ds1302_rtc_remove),
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};
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static int __init ds1302_rtc_init(void)
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{
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return platform_driver_register(&ds1302_platform_driver);
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return platform_driver_probe(&ds1302_platform_driver, ds1302_rtc_probe);
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}
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static void __exit ds1302_rtc_exit(void)
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