mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 21:33:00 +00:00
9ebc2935f3
It was the last platform under gt64120 and will fit better into the new platform makefile scheme, if moved. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
|
|
* time.c: MIPS CPU Count/Compare timer hookup
|
|
*
|
|
* Author: Mark.Zhan, <rongkai.zhan@windriver.com>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
|
|
* Copyright (C) 2006, Wind River System Inc.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/gt64120.h>
|
|
#include <asm/time.h>
|
|
|
|
#define WRPPMC_CPU_CLK_FREQ 40000000 /* 40MHZ */
|
|
|
|
/*
|
|
* Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect
|
|
*
|
|
* NOTE: We disable all GT64120 timers, and use MIPS processor internal
|
|
* timer as the source of kernel clock tick.
|
|
*/
|
|
void __init plat_time_init(void)
|
|
{
|
|
/* Disable GT64120 timers */
|
|
GT_WRITE(GT_TC_CONTROL_OFS, 0x00);
|
|
GT_WRITE(GT_TC0_OFS, 0x00);
|
|
GT_WRITE(GT_TC1_OFS, 0x00);
|
|
GT_WRITE(GT_TC2_OFS, 0x00);
|
|
GT_WRITE(GT_TC3_OFS, 0x00);
|
|
|
|
/* Use MIPS compare/count internal timer */
|
|
mips_hpt_frequency = WRPPMC_CPU_CLK_FREQ;
|
|
}
|