linux.git/arch/x86/kernel/rtc.c, branch v2.6.26

provide rtc_cmos platform device

2008-06-13T01:05:42+00:00

Recently (around 2.6.25) I've noticed that RTC no longer works for me.  It
turned out this is because I use pnpacpi=off kernel option to work around
the parport_pc bugs.  I always did so, but RTC used to work fine in the
past, and now it have regressed.

The patch fixes the problem by creating the platform device for the RTC
when PNP is disabled.  This may also help running the PNP-enabled kernel
on an older PCs.

Signed-off-by: Stas Sergeev 
Cc: David Brownell 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Bjorn Helgaas 
Cc: Adam Belay 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

x86: fix cmos read and write to not use inb_p and outb_p

2008-04-17T15:40:47+00:00

fix code to access CMOS rtc registers so that it does not use inb_p and
outb_p routines, which are deprecated.  Extensive research on all known
CMOS RTC chipset timing shows that there is no need for a delay in
accessing the registers of these chips even on old machines. These chipa
are never on an expansion bus, but have always been "motherboard"
resources, either in the processor chipset or explicitly on the
motherboard, and they are not part of the ISA/LPC or PCI buses, so
delays should not be based on bus timing. The reason to fix it:

 1) port 80 writes often hang some laptops that use ENE EC chipsets,
    esp. those designed and manufactured by Quanta for HP;

 2) RTC accesses are timing sensitive, and extra microseconds may matter;

 3) the new "io_delay" function is calibrated by expansion bus timing needs,
    thus is not appropriate for access to CMOS rtc registers.

Signed-off-by: David P. Reed 
Acked-by: Alan Cox 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: enable ACPI extended century handling for 32bit

2008-04-17T15:40:45+00:00

The extended century readout does not solve the year 2038 problem on
32bit!

v2: Fix compilation on !ACPI, pointed out by tglx

Signed-off-by: Andi Kleen 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: add warning when RTC clock reports binary

2008-04-17T15:40:45+00:00

We assume that the RTC clock is BCD, so print a warning if it claims
to be binary.

[ tglx@linutronix.de: changed to WARN_ON - we want to know that!
  If no one reports it we can remove the complete if (RTC_ALWAYS_BCD)
  magic, which has RTC_ALWAYS_BCD defined to 1 since Linux 1.0 ... ]

Signed-off-by: Andi Kleen 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: use year 2000 offset for cmos clock

2008-04-17T15:40:45+00:00

We know it is already after 2000. Use the year 2000 offset for both 32
and 64 bit, which removes ifdefs and the 1970 magic.

[ tglx@linutronix.de: remove 1970 magic, replace bogus commit message ]

Signed-off-by: Andi Kleen 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: fix sched_clock()

2008-01-30T12:32:40+00:00

[ andi@firstfloor.org: build fix ]

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: read_tsc sync

2008-01-30T12:32:39+00:00

make native_read_tsc() always non-speculative.

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: move native_read_tsc() offline

2008-01-30T12:32:39+00:00

move native_read_tsc() offline.

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: share rtc code

2008-01-30T12:30:27+00:00

Remove the rtc code from time_64.c and add the extra bits to the
i386 path. The ACPI century check is probably valid for i386 as
well, but this is material for a separate patch.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar

x86: isolate the rtc code for sharing

2008-01-30T12:30:26+00:00

The mach-default/mach_time.h code inline is moved to arch/x86/kernel/rtc.c
and the header files are adjusted.

Shrink the 3 dozen includes to the ones we really need.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar