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>

1 files changed, 23 insertions, 14 deletions

diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index a028cdf8f974..0c1980c3608a 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -43,9 +43,9 @@ static inline unsigned long read_CRTR(void)
 {
         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 inline unsigned long read_CRTR(void)
  */
 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 @@ static void
 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 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
                 irqmask = 0;
                 break;
         }
-        at91_sys_write(AT91_ST_IER, irqmask);
+        at91_st_write(AT91_ST_IER, irqmask);
 }
 
 static int
@@ -156,12 +156,12 @@ clkevt32k_next_event(unsigned long delta, struct clock_event_device *dev)
         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 @@ static struct clock_event_device clkevt = {
         .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 @@ void __init at91rm9200_timer_init(void)
          * 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);