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

diff options

author	Linus Torvalds <torvalds@linux-foundation.org>	2013-03-21 11:29:11 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2013-03-21 11:29:11 -0400
commit	cd82346934888e083da3b70e4bea13923175d086 (patch)
tree	40d5058b50864e2c42e5a14cc4bd1029fe9373e0 /kernel/user.c
parent	172a271b5e090da7468c66b9ccbcdb3d929eed75 (diff)
parent	fd4a5aef002bb57e8a35ed34d8a878034b9bde94 (diff)

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar: "A fair chunk of the linecount comes from a fix for a tracing bug that corrupts latency tracing buffers when the overwrite mode is changed on the fly - the rest is mostly assorted fewliner fixlets." * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86: Add SNB/SNB-EP scheduling constraints for cycle_activity event kprobes/x86: Check Interrupt Flag modifier when registering probe kprobes: Make hash_64() as always inlined perf: Generate EXIT event only once per task context perf: Reset hwc->last_period on sw clock events tracing: Prevent buffer overwrite disabled for latency tracers tracing: Keep overwrite in sync between regular and snapshot buffers tracing: Protect tracer flags with trace_types_lock perf tools: Fix LIBNUMA build with glibc 2.12 and older. tracing: Fix free of probe entry by calling call_rcu_sched() perf/POWER7: Create a sysfs format entry for Power7 events perf probe: Fix segfault libtraceevent: Remove hard coded include to /usr/local/include in Makefile perf record: Fix -C option perf tools: check if -DFORTIFY_SOURCE=2 is allowed perf report: Fix build with NO_NEWT=1 perf annotate: Fix build with NO_NEWT=1 tracing: Fix race in snapshot swapping

Diffstat (limited to 'kernel/user.c')

0 files changed, 0 insertions, 0 deletions

/* * A RTC driver for the Simtek STK17TA8 * * By Thomas Hommel <thomas.hommel@ge.com> * * Based on the DS1553 driver from * Atsushi Nemoto <anemo@mba.ocn.ne.jp> * * 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 <linux/bcd.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/gfp.h> #include <linux/delay.h> #include <linux/jiffies.h> #include <linux/interrupt.h> #include <linux/rtc.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/module.h> #define DRV_VERSION "0.1" #define RTC_REG_SIZE 0x20000 #define RTC_OFFSET 0x1fff0 #define RTC_FLAGS (RTC_OFFSET + 0) #define RTC_CENTURY (RTC_OFFSET + 1) #define RTC_SECONDS_ALARM (RTC_OFFSET + 2) #define RTC_MINUTES_ALARM (RTC_OFFSET + 3) #define RTC_HOURS_ALARM (RTC_OFFSET + 4) #define RTC_DATE_ALARM (RTC_OFFSET + 5) #define RTC_INTERRUPTS (RTC_OFFSET + 6) #define RTC_WATCHDOG (RTC_OFFSET + 7) #define RTC_CALIBRATION (RTC_OFFSET + 8) #define RTC_SECONDS (RTC_OFFSET + 9) #define RTC_MINUTES (RTC_OFFSET + 10) #define RTC_HOURS (RTC_OFFSET + 11) #define RTC_DAY (RTC_OFFSET + 12) #define RTC_DATE (RTC_OFFSET + 13) #define RTC_MONTH (RTC_OFFSET + 14) #define RTC_YEAR (RTC_OFFSET + 15) #define RTC_SECONDS_MASK 0x7f #define RTC_DAY_MASK 0x07 #define RTC_CAL_MASK 0x3f /* Bits in the Calibration register */ #define RTC_STOP 0x80 /* Bits in the Flags register */ #define RTC_FLAGS_AF 0x40 #define RTC_FLAGS_PF 0x20 #define RTC_WRITE 0x02 #define RTC_READ 0x01 /* Bits in the Interrupts register */ #define RTC_INTS_AIE 0x40 struct rtc_plat_data { struct rtc_device *rtc; void __iomem *ioaddr; unsigned long last_jiffies; int irq; unsigned int irqen; int alrm_sec; int alrm_min; int alrm_hour; int alrm_mday; spinlock_t lock; }; static int stk17ta8_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; u8 flags; flags = readb(pdata->ioaddr + RTC_FLAGS); writeb(flags | RTC_WRITE, pdata->ioaddr + RTC_FLAGS); writeb(bin2bcd(tm->tm_year % 100), ioaddr + RTC_YEAR); writeb(bin2bcd(tm->tm_mon + 1), ioaddr + RTC_MONTH); writeb(bin2bcd(tm->tm_wday) & RTC_DAY_MASK, ioaddr + RTC_DAY); writeb(bin2bcd(tm->tm_mday), ioaddr + RTC_DATE); writeb(bin2bcd(tm->tm_hour), ioaddr + RTC_HOURS); writeb(bin2bcd(tm->tm_min), ioaddr + RTC_MINUTES); writeb(bin2bcd(tm->tm_sec) & RTC_SECONDS_MASK, ioaddr + RTC_SECONDS); writeb(bin2bcd((tm->tm_year + 1900) / 100), ioaddr + RTC_CENTURY); writeb(flags & ~RTC_WRITE, pdata->ioaddr + RTC_FLAGS); return 0; } static int stk17ta8_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct platform_device *pdev = to_platform_device(dev); struct rtc_plat_data *pdata = platform_get_drvdata(pdev); void __iomem *ioaddr = pdata->ioaddr; unsigned int year, month, day, hour, minute, second, week; unsigned int century; u8 flags; /* give enough time to update RTC in case of continuous read */ if (pdata->last_jiffies == jiffies) msleep(1); pdata->last_jiffies = jiffies; flags = readb(pdata->ioaddr + RTC_FLAGS); writeb(flags | RTC_READ, ioaddr + RTC_FLAGS); second = readb(ioaddr + RTC_SECONDS) & RTC_SECONDS_MASK; minute = readb(ioaddr + RTC_MINUTES); hour = readb(ioaddr + RTC_HOURS); day = readb(ioaddr + RTC_DATE); week = readb(ioaddr + RTC_DAY) & RTC_DAY_MASK; month = readb(ioaddr + RTC_MONTH); year = readb(ioaddr + RTC_YEAR); century = readb(ioaddr + RTC_CENTURY); writeb(flags & ~RTC_READ, ioaddr + RTC_FLAGS); tm->tm_sec = bcd2bin(second); tm->tm_min = bcd2bin(minute); tm->tm_hour = bcd2bin(hour); tm->tm_mday = bcd2bin(day); tm->tm_wday = bcd2bin(week); tm->tm_mon = bcd2bin(month) - 1; /* year is 1900 + tm->tm_year */ tm->tm_year = bcd2bin(year) + bcd2bin(century) * 100 - 1900; if (rtc_valid_tm(tm) < 0) { dev_err(dev, "retrieved date/time is not valid.\n"); rtc_time_to_tm(0, tm); } return 0; } static void stk17ta8_rtc_update_alarm(struct rtc_plat_data *pdata) { void __iomem *ioaddr = pdata->ioaddr; unsigned long irqflags; u8 flags; spin_lock_irqsave(&pdata->lock, irqflags); flags = readb(ioaddr + RTC_FLAGS); writeb(flags | RTC_WRITE, ioaddr + RTC_FLAGS); writeb(pdata->alrm_mday < 0 || (pdata->irqen & RTC_UF) ? 0x80 : bin2bcd(pdata->alrm_mday), ioaddr + RTC_DATE_ALARM); writeb(pdata->alrm_hour < 0 || (pdata->irqen & RTC_UF) ? 0x80 : bin2bcd(pdata->alrm_hour), ioaddr + RTC_HOURS_ALARM); writeb(pdata->alrm_min < 0 || (pdata->irqen & RTC_UF) ? 0x80 : bin2bcd(pdata->alrm_min), ioaddr + RTC_MINUTES_ALARM);


context:
space:
mode: