[U-Boot] [PATCH 4/4] ARM: bcm283x: Switch to generic timer

Marek Vasut
2015-05-04T20:54:37Z

Switch to generic timer implementation from lib/time.c .
This also fixes a signed overflow which was in __udelay()
implementation.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Tyler Baker <tyler.baker@linaro.org>
---
arch/arm/mach-bcm283x/Makefile | 2 +-
arch/arm/mach-bcm283x/timer.c | 58 ------------------------------------------
include/configs/rpi-common.h | 6 +++++
3 files changed, 7 insertions(+), 59 deletions(-)
delete mode 100644 arch/arm/mach-bcm283x/timer.c

diff --git a/arch/arm/mach-bcm283x/Makefile b/arch/arm/mach-bcm283x/Makefile
index ac27d00..f0dadd0 100644
--- a/arch/arm/mach-bcm283x/Makefile
+++ b/arch/arm/mach-bcm283x/Makefile
@@ -5,4 +5,4 @@
#

obj-$(CONFIG_TARGET_RPI) += lowlevel_init.o
-obj-y += init.o reset.o timer.o mbox.o phys2bus.o
+obj-y += init.o reset.o mbox.o phys2bus.o
diff --git a/arch/arm/mach-bcm283x/timer.c b/arch/arm/mach-bcm283x/timer.c
deleted file mode 100644
index 017907c..0000000
--- a/arch/arm/mach-bcm283x/timer.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * (C) Copyright 2012 Stephen Warren
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * 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.
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/arch/timer.h>
-
-ulong get_timer_us(ulong base)
-{
- struct bcm2835_timer_regs *regs =
- (struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR;
-
- return readl(&regs->clo) - base;
-}
-
-ulong get_timer(ulong base)
-{
- ulong us = get_timer_us(0);
- us /= (1000000 / CONFIG_SYS_HZ);
- us -= base;
- return us;
-}
-
-unsigned long long get_ticks(void)
-{
- return get_timer(0);
-}
-
-ulong get_tbclk(void)
-{
- return CONFIG_SYS_HZ;
-}
-
-void __udelay(unsigned long usec)
-{
- ulong endtime;
- signed long diff;
-
- endtime = get_timer_us(0) + usec;
-
- do {
- ulong now = get_timer_us(0);
- diff = endtime - now;
- } while (diff >= 0);
-}
diff --git a/include/configs/rpi-common.h b/include/configs/rpi-common.h
index 3121ac9..b54cf8b 100644
--- a/include/configs/rpi-common.h
+++ b/include/configs/rpi-common.h
@@ -8,12 +8,18 @@
#define _RPI_COMMON_H_

#include <linux/sizes.h>
+#include <asm/arch/timer.h>

/* Architecture, CPU, etc.*/
#define CONFIG_SYS_GENERIC_BOARD
#define CONFIG_BCM2835
#define CONFIG_ARCH_CPU_INIT
#define CONFIG_SYS_DCACHE_OFF
+
+#define CONFIG_SYS_TIMER_RATE 1000000
+#define CONFIG_SYS_TIMER_COUNTER \
+ (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
+
/*
* 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
* so 2708 has historically been used rather than a dedicated 2835 ID.
--
2.1.4