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Based on 2 normalized pattern(s): 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 program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 51 franklin street fifth floor boston ma 02110 1301 usa 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 [no]_[pad]_[ctrl] any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
42 lines
791 B
C
42 lines
791 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Cobalt time initialization.
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*
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* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
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*/
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#include <linux/i8253.h>
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#include <linux/init.h>
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#include <asm/gt64120.h>
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#include <asm/time.h>
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#define GT641XX_BASE_CLOCK 50000000 /* 50MHz */
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void __init plat_time_init(void)
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{
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u32 start, end;
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int i = HZ / 10;
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setup_pit_timer();
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gt641xx_set_base_clock(GT641XX_BASE_CLOCK);
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/*
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* MIPS counter frequency is measured during a 100msec interval
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* using GT64111 timer0.
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*/
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while (!gt641xx_timer0_state())
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;
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start = read_c0_count();
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while (i--)
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while (!gt641xx_timer0_state())
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;
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end = read_c0_count();
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mips_hpt_frequency = (end - start) * 10;
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printk(KERN_INFO "MIPS counter frequency %dHz\n", mips_hpt_frequency);
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}
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