Paulraj, Sandeep wrote:
Remove volatiles and memory mapped structure accesses and replace with readl and writel macro usage.
Signed-off-by: Nick Thompson nick.thompson@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 | 29 +++++++++++++++++------------ 1 files changed, 17 insertions(+), 12 deletions(-)
I started the process of integrating into my branch and doing some quick tests on other DM parts. But, I got 2 checkpatch warnings while running checkpatch. One of them I believe is unavoidable because U-boot does not have a linux/io.h
The other deals with using a typedef.
I only get one warning with 0.09 of checkpatch. It warns about not adding new typedefs. The typedef is already there though - I only removed the volatile. No excuse really.
In this case I expect it is fine to just to use a struct instead. Do you want me to make that change?
diff --git a/cpu/arm926ejs/davinci/timer.c b/cpu/arm926ejs/davinci/timer.c index 80751ad..f705a6e 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 { +typedef struct { u_int32_t pid12; u_int32_t emumgt; u_int32_t na1; @@ -53,7 +54,7 @@ typedef volatile struct { u_int32_t wdtcr; } davinci_timer;
-davinci_timer *timer = (davinci_timer *)CONFIG_SYS_TIMERBASE; +static davinci_timer * const timer = (davinci_timer *)CONFIG_SYS_TIMERBASE;
#define TIMER_LOAD_VAL (CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ) #define TIM_CLK_DIV 16 @@ -64,30 +65,30 @@ 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 */