Remove volatiles and memory mapped structure accesses and replace with
readl and writel macro usage.
Signed-off-by: Nick Thompson <nick.thomp...@gefanuc.com>
---
This patch was originally part of the da830 support patch, but this
effort is now being integrated into davinci. As a result, these
changes would be have been lost, as no change is required for da830.
The changes where request to be kept available however, so here they
are.
cpu/arm926ejs/davinci/timer.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/cpu/arm926ejs/davinci/timer.c b/cpu/arm926ejs/davinci/timer.c
index 80751ad..7c2c208 100644
--- a/cpu/arm926ejs/davinci/timer.c
+++ b/cpu/arm926ejs/davinci/timer.c
@@ -38,8 +38,9 @@
*/
#include <common.h>
+#include <asm/io.h>
-typedef volatile struct {
+struct davinci_timer {
u_int32_t pid12;
u_int32_t emumgt;
u_int32_t na1;
@@ -51,9 +52,10 @@ typedef volatile struct {
u_int32_t tcr;
u_int32_t tgcr;
u_int32_t wdtcr;
-} davinci_timer;
+};
-davinci_timer *timer = (davinci_timer *)CONFIG_SYS_TIMERBASE;
+static struct davinci_timer * const timer =
+ (struct davinci_timer *)CONFIG_SYS_TIMERBASE;
#define TIMER_LOAD_VAL (CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ)
#define TIM_CLK_DIV 16
@@ -64,30 +66,30 @@ static ulong lastinc;
int timer_init(void)
{
/* We are using timer34 in unchained 32-bit mode, full speed */
- timer->tcr = 0x0;
- timer->tgcr = 0x0;
- timer->tgcr = 0x06 | ((TIM_CLK_DIV - 1) << 8);
- timer->tim34 = 0x0;
- timer->prd34 = TIMER_LOAD_VAL;
+ writel(0x0, &timer->tcr);
+ writel(0x0, &timer->tgcr);
+ writel(0x06 | ((TIM_CLK_DIV - 1) << 8), &timer->tgcr);
+ writel(0x0, &timer->tim34);
+ writel(TIMER_LOAD_VAL, &timer->prd34);
lastinc = 0;
timestamp = 0;
- timer->tcr = 2 << 22;
+ writel(2 << 22, &timer->tcr);
return(0);
}
void reset_timer(void)
{
- timer->tcr = 0x0;
- timer->tim34 = 0;
+ writel(0x0, &timer->tcr);
+ writel(0x0, &timer->tim34);
lastinc = 0;
timestamp = 0;
- timer->tcr = 2 << 22;
+ writel(2 << 22, &timer->tcr);
}
static ulong get_timer_raw(void)
{
- ulong now = timer->tim34;
+ ulong now = readl(&timer->tim34);
if (now >= lastinc) {
/* normal mode */
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