From 614c27251196b7567fdb6e98a8b1fe2905367c0c Mon Sep 17 00:00:00 2001
From: Soren Brinkmann <soren.brinkmann@xilinx.com>
Date: Thu, 21 Nov 2013 13:38:57 -0800
Subject: [PATCH] zynq: timer: Migrate to zynq clock framework
Remove hardcoded frequencies in favor of Zynq clock framework.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---
arch/arm/cpu/armv7/zynq/timer.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/armv7/zynq/timer.c b/arch/arm/cpu/armv7/zynq/timer.c
index 2be253c2c3..78e30a6ddc 100644
--- a/arch/arm/cpu/armv7/zynq/timer.c
+++ b/arch/arm/cpu/armv7/zynq/timer.c
@@ -29,6 +29,7 @@
#include <div64.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
+#include <asm/arch/clk.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -48,7 +49,6 @@ static struct scu_timer *timer_base =
#define TIMER_LOAD_VAL 0xFFFFFFFF
#define TIMER_PRESCALE 255
-#define TIMER_TICK_HZ (CONFIG_CPU_FREQ_HZ / 2 / TIMER_PRESCALE)
int timer_init(void)
{
@@ -56,6 +56,8 @@ int timer_init(void)
(TIMER_PRESCALE << SCUTIMER_CONTROL_PRESCALER_SHIFT) |
SCUTIMER_CONTROL_ENABLE_MASK;
+ gd->arch.timer_rate_hz = (gd->cpu_clk / 2) / TIMER_PRESCALE;
+
/* Load the timer counter register */
writel(0xFFFFFFFF, &timer_base->load);
@@ -69,7 +71,7 @@ int timer_init(void)
/* Reset time */
gd->arch.lastinc = readl(&timer_base->counter) /
- (TIMER_TICK_HZ / CONFIG_SYS_HZ);
+ (gd->arch.timer_rate_hz / CONFIG_SYS_HZ);
gd->arch.tbl = 0;
return 0;
@@ -83,7 +85,8 @@ ulong get_timer_masked(void)
{
ulong now;
- now = readl(&timer_base->counter) / (TIMER_TICK_HZ / CONFIG_SYS_HZ);
+ now = readl(&timer_base->counter) /
+ (gd->arch.timer_rate_hz / CONFIG_SYS_HZ);
if (gd->arch.lastinc >= now) {
/* Normal mode */
@@ -107,7 +110,7 @@ void __udelay(unsigned long usec)
if (usec == 0)
return;
- countticks = lldiv(TIMER_TICK_HZ * usec, 1000000);
+ countticks = lldiv(gd->arch.timer_rate_hz * usec, 1000000);
/* decrementing timer */
timeend = readl(&timer_base->counter) - countticks;
--
2.39.5