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ARM: tegra: convert to common timer code

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Convert tegra to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Rob Herring 2013-10-04 10:22:47 -05:00 committed by Tom Rini
parent 23ab7ee0ff
commit 31df9893b9
3 changed files with 4 additions and 96 deletions
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2
arch/arm/cpu/tegra-common/Makefile
View file

@ -8,4 +8,4 @@
#
obj-y += lowlevel_init.o
obj-y += ap.o board.o sys_info.o timer.o clock.o cache.o
obj-y += ap.o board.o sys_info.o clock.o cache.o

95
arch/arm/cpu/tegra-common/timer.c
View file

@ -1,95 +0,0 @@
/*
* (C) Copyright 2010,2011
* NVIDIA Corporation <www.nvidia.com>
*
* (C) Copyright 2008
* Texas Instruments
*
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Moahmmed Khasim <khasim@ti.com>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
* Alex Zuepke <azu@sysgo.de>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/timer.h>
DECLARE_GLOBAL_DATA_PTR;
/* counter runs at 1MHz */
#define TIMER_CLK 1000000
#define TIMER_LOAD_VAL 0xffffffff
/* timer without interrupts */
ulong get_timer(ulong base)
{
return get_timer_masked() - base;
}
/* delay x useconds */
void __udelay(unsigned long usec)
{
long tmo = usec * (TIMER_CLK / 1000) / 1000;
unsigned long now, last = timer_get_us();
while (tmo > 0) {
now = timer_get_us();
if (last > now) /* count up timer overflow */
tmo -= TIMER_LOAD_VAL - last + now;
else
tmo -= now - last;
last = now;
}
}
ulong get_timer_masked(void)
{
ulong now;
/* current tick value */
now = timer_get_us() / (TIMER_CLK / CONFIG_SYS_HZ);
if (now >= gd->arch.lastinc) /* normal mode (non roll) */
/* move stamp forward with absolute diff ticks */
gd->arch.tbl += (now - gd->arch.lastinc);
else /* we have rollover of incrementer */
gd->arch.tbl += ((TIMER_LOAD_VAL / (TIMER_CLK / CONFIG_SYS_HZ))
- gd->arch.lastinc) + now;
gd->arch.lastinc = now;
return gd->arch.tbl;
}
/*
* This function is derived from PowerPC code (read timebase as long long).
* On ARM it just returns the timer value.
*/
unsigned long long get_ticks(void)
{
return get_timer(0);
}
/*
* This function is derived from PowerPC code (timebase clock frequency).
* On ARM it returns the number of timer ticks per second.
*/
ulong get_tbclk(void)
{
return CONFIG_SYS_HZ;
}
unsigned long timer_get_us(void)
{
struct timerus *timer_base = (struct timerus *)NV_PA_TMRUS_BASE;
return readl(&timer_base->cntr_1us);
}

3
include/configs/tegra-common.h
View file

@ -19,6 +19,9 @@
#include <asm/arch/tegra.h> /* get chip and board defs */
#define CONFIG_SYS_TIMER_RATE 1000000
#define CONFIG_SYS_TIMER_COUNTER NV_PA_TMRUS_BASE
/*
* Display CPU and Board information
*/