61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License as published by the
|
||
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
* option) any later version.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
||
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along
|
||
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/ssb/ssb.h>
|
||
|
|
#include <asm/time.h>
|
||
|
|
#include <bcm47xx.h>
|
||
|
|
|
||
|
|
void __init plat_time_init(void)
|
||
|
|
{
|
||
|
|
unsigned long hz = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Use deterministic values for initial counter interrupt
|
||
|
|
* so that calibrate delay avoids encountering a counter wrap.
|
||
|
|
*/
|
||
|
|
write_c0_count(0);
|
||
|
|
write_c0_compare(0xffff);
|
||
|
|
|
||
|
|
switch (bcm47xx_bus_type) {
|
||
|
|
#ifdef CONFIG_BCM47XX_SSB
|
||
|
|
case BCM47XX_BUS_TYPE_SSB:
|
||
|
|
hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2;
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_BCM47XX_BCMA
|
||
|
|
case BCM47XX_BUS_TYPE_BCMA:
|
||
|
|
hz = bcma_cpu_clock(&bcm47xx_bus.bcma.bus.drv_mips) / 2;
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!hz)
|
||
|
|
hz = 100000000;
|
||
|
|
|
||
|
|
/* Set MIPS counter frequency for fixed_rate_gettimeoffset() */
|
||
|
|
mips_hpt_frequency = hz;
|
||
|
|
}
|