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[MIPS] Fixup migration to GENERIC_TIME

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Since we already moved to GENERIC_TIME, we should implement alternatives
of old do_gettimeoffset routines to get sub-jiffies resolution from
gettimeofday().  This patch includes:

 * MIPS clocksource support (based on works by Manish Lachwani).
 * remove unused gettimeoffset routines and related codes.
 * remove unised 64bit do_div64_32().
 * simplify mips_hpt_init. (no argument needed, __init tag)
 * simplify c0_hpt_timer_init. (no need to write to c0_count)
 * remove some hpt_init routines.
 * mips_hpt_mask variable to specify bitmask of hpt value.
 * convert jmr3927_do_gettimeoffset to jmr3927_hpt_read.
 * convert ip27_do_gettimeoffset to ip27_hpt_read.
 * convert bcm1480_do_gettimeoffset to bcm1480_hpt_read.
 * simplify sb1250 hpt functions. (no need to subtract and shift)
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-10-24 00:21:27 +09:00
committed by Ralf Baechle
parent 70e46f48cb
commit 16b7b2ac01
13 changed files with 104 additions and 523 deletions
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9
arch/mips/dec/time.c
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@@ -160,11 +160,6 @@ static unsigned int dec_ioasic_hpt_read(void)
return ioasic_read(IO_REG_FCTR);
}
static void dec_ioasic_hpt_init(unsigned int count)
{
ioasic_write(IO_REG_FCTR, ioasic_read(IO_REG_FCTR) - count);
}
void __init dec_time_init(void)
{
@@ -174,11 +169,9 @@ void __init dec_time_init(void)
mips_timer_state = dec_timer_state;
mips_timer_ack = dec_timer_ack;
if (!cpu_has_counter && IOASIC) {
if (!cpu_has_counter && IOASIC)
/* For pre-R4k systems we use the I/O ASIC's counter. */
mips_hpt_read = dec_ioasic_hpt_read;
mips_hpt_init = dec_ioasic_hpt_init;
}
/* Set up the rate of periodic DS1287 interrupts. */
CMOS_WRITE(RTC_REF_CLCK_32KHZ | (16 - __ffs(HZ)), RTC_REG_A);