ARM: tegra: convert to common timer code

Convert tegra to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>

arch/arm/cpu/tegra-common/Makefile

@@ -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

arch/arm/cpu/tegra-common/timer.c

-/*
- * (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);
-}

include/configs/tegra-common.h

@@ -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
  */