ARM: at91: make ST (System Timer) soc independent
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Ryan Mallon <rmallon@gmail.com>
diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index a028cdf..0c1980c 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -43,9 +43,9 @@
{
unsigned long x1, x2;
- x1 = at91_sys_read(AT91_ST_CRTR);
+ x1 = at91_st_read(AT91_ST_CRTR);
do {
- x2 = at91_sys_read(AT91_ST_CRTR);
+ x2 = at91_st_read(AT91_ST_CRTR);
if (x1 == x2)
break;
x1 = x2;
@@ -58,7 +58,7 @@
*/
static irqreturn_t at91rm9200_timer_interrupt(int irq, void *dev_id)
{
- u32 sr = at91_sys_read(AT91_ST_SR) & irqmask;
+ u32 sr = at91_st_read(AT91_ST_SR) & irqmask;
/*
* irqs should be disabled here, but as the irq is shared they are only
@@ -110,22 +110,22 @@
clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
{
/* Disable and flush pending timer interrupts */
- at91_sys_write(AT91_ST_IDR, AT91_ST_PITS | AT91_ST_ALMS);
- (void) at91_sys_read(AT91_ST_SR);
+ at91_st_write(AT91_ST_IDR, AT91_ST_PITS | AT91_ST_ALMS);
+ (void) at91_st_read(AT91_ST_SR);
last_crtr = read_CRTR();
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
/* PIT for periodic irqs; fixed rate of 1/HZ */
irqmask = AT91_ST_PITS;
- at91_sys_write(AT91_ST_PIMR, RM9200_TIMER_LATCH);
+ at91_st_write(AT91_ST_PIMR, RM9200_TIMER_LATCH);
break;
case CLOCK_EVT_MODE_ONESHOT:
/* ALM for oneshot irqs, set by next_event()
* before 32 seconds have passed
*/
irqmask = AT91_ST_ALMS;
- at91_sys_write(AT91_ST_RTAR, last_crtr);
+ at91_st_write(AT91_ST_RTAR, last_crtr);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
@@ -133,7 +133,7 @@
irqmask = 0;
break;
}
- at91_sys_write(AT91_ST_IER, irqmask);
+ at91_st_write(AT91_ST_IER, irqmask);
}
static int
@@ -156,12 +156,12 @@
alm = read_CRTR();
/* Cancel any pending alarm; flush any pending IRQ */
- at91_sys_write(AT91_ST_RTAR, alm);
- (void) at91_sys_read(AT91_ST_SR);
+ at91_st_write(AT91_ST_RTAR, alm);
+ (void) at91_st_read(AT91_ST_SR);
/* Schedule alarm by writing RTAR. */
alm += delta;
- at91_sys_write(AT91_ST_RTAR, alm);
+ at91_st_write(AT91_ST_RTAR, alm);
return status;
}
@@ -175,15 +175,24 @@
.set_mode = clkevt32k_mode,
};
+void __iomem *at91_st_base;
+
+void __init at91rm9200_ioremap_st(u32 addr)
+{
+ at91_st_base = ioremap(addr, 256);
+ if (!at91_st_base)
+ panic("Impossible to ioremap ST\n");
+}
+
/*
* ST (system timer) module supports both clockevents and clocksource.
*/
void __init at91rm9200_timer_init(void)
{
/* Disable all timer interrupts, and clear any pending ones */
- at91_sys_write(AT91_ST_IDR,
+ at91_st_write(AT91_ST_IDR,
AT91_ST_PITS | AT91_ST_WDOVF | AT91_ST_RTTINC | AT91_ST_ALMS);
- (void) at91_sys_read(AT91_ST_SR);
+ (void) at91_st_read(AT91_ST_SR);
/* Make IRQs happen for the system timer */
setup_irq(AT91_ID_SYS, &at91rm9200_timer_irq);
@@ -192,7 +201,7 @@
* directly for the clocksource and all clockevents, after adjusting
* its prescaler from the 1 Hz default.
*/
- at91_sys_write(AT91_ST_RTMR, 1);
+ at91_st_write(AT91_ST_RTMR, 1);
/* Setup timer clockevent, with minimum of two ticks (important!!) */
clkevt.mult = div_sc(AT91_SLOW_CLOCK, NSEC_PER_SEC, clkevt.shift);