60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
/*
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* This file is part of the depthcharge project.
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*
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* Copyright (C) 2014 The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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/*
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* TODO(vbendeb): reverted this hack once proper timer code is in place (see
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* http://crosbug.com/p/28880 for details.
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*/
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#define MIN_TIMER_FREQ 1000000
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uint64_t timer_hz(void)
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{
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return (CONFIG_LP_IPQ806X_TIMER_FREQ >= MIN_TIMER_FREQ) ?
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CONFIG_LP_IPQ806X_TIMER_FREQ : MIN_TIMER_FREQ;
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}
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uint64_t timer_raw_value(void)
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{
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uint64_t rawv = readl((void *)CONFIG_LP_IPQ806X_TIMER_REG);
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/*
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* This is extremely crude, but it kicks in only for the case when the
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* timer clock frequency is below 1MHz, which should never be the case
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* on a properly configured system. The compiler will eliminate the
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* check as long as config value exceeds 1MHz.
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*/
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if (CONFIG_LP_IPQ806X_TIMER_FREQ < MIN_TIMER_FREQ)
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rawv *= (MIN_TIMER_FREQ / CONFIG_LP_IPQ806X_TIMER_FREQ);
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return rawv;
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}
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