ARM: sa11x0/pxa: convert OS timer registers to IOMEM
Make the OS timer registers have IOMEM like properities so they can
be passed to readl_relaxed/writel_relaxed() et.al. rather than being
straight volatile dereferences. Add linux/io.h includes where
required.
linux/io.h includes added to arch/arm/mach-sa1100/cpu-sa1100.c,
arch/arm/mach-sa1100/jornada720_ssp.c, arch/arm/mach-sa1100/leds-lart.c
drivers/input/touchscreen/jornada720_ts.c, drivers/pcmcia/sa1100_shannon.c
from Arnd.
This fixes these warnings:
arch/arm/mach-sa1100/time.c: In function 'sa1100_timer_init':
arch/arm/mach-sa1100/time.c:104: warning: passing argument 1 of 'clocksource_mmio_init' discards qualifiers from pointer target type
arch/arm/mach-pxa/time.c: In function 'pxa_timer_init':
arch/arm/mach-pxa/time.c:126: warning: passing argument 1 of 'clocksource_mmio_init' discards qualifiers from pointer target type
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c
index 6af26e8..80702c9 100644
--- a/arch/arm/mach-sa1100/time.c
+++ b/arch/arm/mach-sa1100/time.c
@@ -22,7 +22,7 @@
static u32 notrace sa1100_read_sched_clock(void)
{
- return OSCR;
+ return readl_relaxed(OSCR);
}
#define MIN_OSCR_DELTA 2
@@ -32,8 +32,8 @@
struct clock_event_device *c = dev_id;
/* Disarm the compare/match, signal the event. */
- OIER &= ~OIER_E0;
- OSSR = OSSR_M0;
+ writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER);
+ writel_relaxed(OSSR_M0, OSSR);
c->event_handler(c);
return IRQ_HANDLED;
@@ -44,10 +44,10 @@
{
unsigned long next, oscr;
- OIER |= OIER_E0;
- next = OSCR + delta;
- OSMR0 = next;
- oscr = OSCR;
+ writel_relaxed(readl_relaxed(OIER) | OIER_E0, OIER);
+ next = readl_relaxed(OSCR) + delta;
+ writel_relaxed(next, OSMR0);
+ oscr = readl_relaxed(OSCR);
return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;
}
@@ -59,8 +59,8 @@
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
- OIER &= ~OIER_E0;
- OSSR = OSSR_M0;
+ writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER);
+ writel_relaxed(OSSR_M0, OSSR);
break;
case CLOCK_EVT_MODE_RESUME:
@@ -86,8 +86,8 @@
static void __init sa1100_timer_init(void)
{
- OIER = 0;
- OSSR = OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3;
+ writel_relaxed(0, OIER);
+ writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
setup_sched_clock(sa1100_read_sched_clock, 32, 3686400);
@@ -100,7 +100,7 @@
setup_irq(IRQ_OST0, &sa1100_timer_irq);
- clocksource_mmio_init(&OSCR, "oscr", CLOCK_TICK_RATE, 200, 32,
+ clocksource_mmio_init(OSCR, "oscr", CLOCK_TICK_RATE, 200, 32,
clocksource_mmio_readl_up);
clockevents_register_device(&ckevt_sa1100_osmr0);
}
@@ -110,26 +110,26 @@
static void sa1100_timer_suspend(void)
{
- osmr[0] = OSMR0;
- osmr[1] = OSMR1;
- osmr[2] = OSMR2;
- osmr[3] = OSMR3;
- oier = OIER;
+ osmr[0] = readl_relaxed(OSMR0);
+ osmr[1] = readl_relaxed(OSMR1);
+ osmr[2] = readl_relaxed(OSMR2);
+ osmr[3] = readl_relaxed(OSMR3);
+ oier = readl_relaxed(OIER);
}
static void sa1100_timer_resume(void)
{
- OSSR = 0x0f;
- OSMR0 = osmr[0];
- OSMR1 = osmr[1];
- OSMR2 = osmr[2];
- OSMR3 = osmr[3];
- OIER = oier;
+ writel_relaxed(0x0f, OSSR);
+ writel_relaxed(osmr[0], OSMR0);
+ writel_relaxed(osmr[1], OSMR1);
+ writel_relaxed(osmr[2], OSMR2);
+ writel_relaxed(osmr[3], OSMR3);
+ writel_relaxed(oier, OIER);
/*
* OSMR0 is the system timer: make sure OSCR is sufficiently behind
*/
- OSCR = OSMR0 - LATCH;
+ writel_relaxed(OSMR0 - LATCH, OSCR);
}
#else
#define sa1100_timer_suspend NULL