litmus-rt.git - The LITMUS^RT kernel.

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author	Ben Hutchings <ben@decadent.org.uk>	2014-02-12 17:14:38 -0500
committer	David S. Miller <davem@davemloft.net>	2014-02-12 17:33:03 -0500
commit	4e5a62db2bed17b2b6241850f330c820f75bc3cd (patch)
tree	69b0f40148adf7629f442241797d00766ea379ea /lib/bitmap.c
parent	fe5df1b91ec35fb80159874670e6bc81c8851c04 (diff)

ethtool: Expand documentation of struct ethtool_test

Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>

Diffstat (limited to 'lib/bitmap.c')

0 files changed, 0 insertions, 0 deletions

/* rtc-sun4v.c: Hypervisor based RTC for SUN4V systems. * * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <asm/hypervisor.h> static unsigned long hypervisor_get_time(void) { unsigned long ret, time; int retries = 10000; retry: ret = sun4v_tod_get(&time); if (ret == HV_EOK) return time; if (ret == HV_EWOULDBLOCK) { if (--retries > 0) { udelay(100); goto retry; } printk(KERN_WARNING "SUN4V: tod_get() timed out.\n"); return 0; } printk(KERN_WARNING "SUN4V: tod_get() not supported.\n"); return 0; } static int sun4v_read_time(struct device *dev, struct rtc_time *tm) { rtc_time_to_tm(hypervisor_get_time(), tm); return 0; } static int hypervisor_set_time(unsigned long secs) { unsigned long ret; int retries = 10000; retry: ret = sun4v_tod_set(secs); if (ret == HV_EOK) return 0; if (ret == HV_EWOULDBLOCK) { if (--retries > 0) { udelay(100); goto retry; } printk(KERN_WARNING "SUN4V: tod_set() timed out.\n"); return -EAGAIN; } printk(KERN_WARNING "SUN4V: tod_set() not supported.\n"); return -EOPNOTSUPP; } static int sun4v_set_time(struct device *dev, struct rtc_time *tm) { unsigned long secs; int err; err = rtc_tm_to_time(tm, &secs); if (err) return err; return hypervisor_set_time(secs); } static const struct rtc_class_ops sun4v_rtc_ops = { .read_time = sun4v_read_time, .set_time = sun4v_set_time, }; static int __init sun4v_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc = rtc_device_register("sun4v", &pdev->dev, &sun4v_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) return PTR_ERR(rtc); platform_set_drvdata(pdev, rtc); return 0; } static int __exit sun4v_rtc_remove(struct platform_device *pdev) { struct rtc_device *rtc = platform_get_drvdata(pdev); rtc_device_unregister(rtc); return 0; } static struct platform_driver sun4v_rtc_driver = { .driver = { .name = "rtc-sun4v", .owner = THIS_MODULE, }, .remove = __exit_p(sun4v_rtc_remove), }; static int __init sun4v_rtc_init(void) { return platform_driver_probe(&sun4v_rtc_driver, sun4v_rtc_probe); } static void __exit sun4v_rtc_exit(void) { platform_driver_unregister(&sun4v_rtc_driver); } 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");


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