diff options
author | Alessandro Zummo <a.zummo@towertech.it> | 2008-11-14 16:37:54 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2008-11-14 16:37:54 -0800 |
commit | cecf61bdee426a3e0a014f7e26990d09c71ed458 (patch) | |
tree | 6a35a56424bbf23dd669f5faa7c0192dd2412c1e /drivers/rtc | |
parent | e64ed0225bd82d4c108c9f78f46070cfade14fac (diff) | |
download | kernel_samsung_smdk4412-cecf61bdee426a3e0a014f7e26990d09c71ed458.zip kernel_samsung_smdk4412-cecf61bdee426a3e0a014f7e26990d09c71ed458.tar.gz kernel_samsung_smdk4412-cecf61bdee426a3e0a014f7e26990d09c71ed458.tar.bz2 |
rtc: rtc-sun4v fixes, revised
- simplified code
- use platform_driver_probe
- removed locking: it's provided by rtc subsystem
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/rtc')
-rw-r--r-- | drivers/rtc/rtc-sun4v.c | 69 |
1 files changed, 19 insertions, 50 deletions
diff --git a/drivers/rtc/rtc-sun4v.c b/drivers/rtc/rtc-sun4v.c index 2012ccb..5b22610 100644 --- a/drivers/rtc/rtc-sun4v.c +++ b/drivers/rtc/rtc-sun4v.c @@ -1,4 +1,4 @@ -/* rtc-sun4c.c: Hypervisor based RTC for SUN4V systems. +/* rtc-sun4v.c: Hypervisor based RTC for SUN4V systems. * * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ @@ -7,21 +7,11 @@ #include <linux/module.h> #include <linux/delay.h> #include <linux/init.h> -#include <linux/time.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <asm/hypervisor.h> -MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); -MODULE_DESCRIPTION("SUN4V RTC driver"); -MODULE_LICENSE("GPL"); - -struct sun4v_rtc { - struct rtc_device *rtc; - spinlock_t lock; -}; - static unsigned long hypervisor_get_time(void) { unsigned long ret, time; @@ -45,15 +35,7 @@ retry: static int sun4v_read_time(struct device *dev, struct rtc_time *tm) { - struct sun4v_rtc *p = dev_get_drvdata(dev); - unsigned long flags, secs; - - spin_lock_irqsave(&p->lock, flags); - secs = hypervisor_get_time(); - spin_unlock_irqrestore(&p->lock, flags); - - rtc_time_to_tm(secs, tm); - + rtc_time_to_tm(hypervisor_get_time(), tm); return 0; } @@ -80,19 +62,14 @@ retry: static int sun4v_set_time(struct device *dev, struct rtc_time *tm) { - struct sun4v_rtc *p = dev_get_drvdata(dev); - unsigned long flags, secs; + unsigned long secs; int err; err = rtc_tm_to_time(tm, &secs); if (err) return err; - spin_lock_irqsave(&p->lock, flags); - err = hypervisor_set_time(secs); - spin_unlock_irqrestore(&p->lock, flags); - - return err; + return hypervisor_set_time(secs); } static const struct rtc_class_ops sun4v_rtc_ops = { @@ -100,33 +77,22 @@ static const struct rtc_class_ops sun4v_rtc_ops = { .set_time = sun4v_set_time, }; -static int __devinit sun4v_rtc_probe(struct platform_device *pdev) +static int __init sun4v_rtc_probe(struct platform_device *pdev) { - struct sun4v_rtc *p = kzalloc(sizeof(*p), GFP_KERNEL); - - if (!p) - return -ENOMEM; - - spin_lock_init(&p->lock); - - p->rtc = rtc_device_register("sun4v", &pdev->dev, + struct rtc_device *rtc = rtc_device_register("sun4v", &pdev->dev, &sun4v_rtc_ops, THIS_MODULE); - if (IS_ERR(p->rtc)) { - int err = PTR_ERR(p->rtc); - kfree(p); - return err; - } - platform_set_drvdata(pdev, p); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + platform_set_drvdata(pdev, rtc); return 0; } -static int __devexit sun4v_rtc_remove(struct platform_device *pdev) +static int __exit sun4v_rtc_remove(struct platform_device *pdev) { - struct sun4v_rtc *p = platform_get_drvdata(pdev); - - rtc_device_unregister(p->rtc); - kfree(p); + struct rtc_device *rtc = platform_get_drvdata(pdev); + rtc_device_unregister(rtc); return 0; } @@ -135,13 +101,12 @@ static struct platform_driver sun4v_rtc_driver = { .name = "rtc-sun4v", .owner = THIS_MODULE, }, - .probe = sun4v_rtc_probe, - .remove = __devexit_p(sun4v_rtc_remove), + .remove = __exit_p(sun4v_rtc_remove), }; static int __init sun4v_rtc_init(void) { - return platform_driver_register(&sun4v_rtc_driver); + return platform_driver_probe(&sun4v_rtc_driver, sun4v_rtc_probe); } static void __exit sun4v_rtc_exit(void) @@ -151,3 +116,7 @@ static void __exit sun4v_rtc_exit(void) module_init(sun4v_rtc_init); module_exit(sun4v_rtc_exit); + +MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); +MODULE_DESCRIPTION("SUN4V RTC driver"); +MODULE_LICENSE("GPL"); |