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Diffstat (limited to 'arch/arm/mach-realview/core.c')
-rw-r--r--arch/arm/mach-realview/core.c198
1 files changed, 28 insertions, 170 deletions
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 9f293438e020..02e9fdeb8faf 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -25,12 +25,11 @@
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/ata_platform.h>
#include <linux/amba/mmci.h>
+#include <linux/gfp.h>
#include <asm/clkdev.h>
#include <asm/system.h>
@@ -39,7 +38,7 @@
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/hardware/arm_timer.h>
-#include <asm/hardware/icst307.h>
+#include <asm/hardware/icst.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
@@ -48,13 +47,12 @@
#include <asm/hardware/gic.h>
+#include <mach/clkdev.h>
#include <mach/platform.h>
#include <mach/irqs.h>
+#include <plat/timer-sp.h>
#include "core.h"
-#include "clock.h"
-
-#define REALVIEW_REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET)
/* used by entry-macro.S and platsmp.c */
void __iomem *gic_cpu_base_addr;
@@ -78,20 +76,6 @@ void __init realview_adjust_zones(int node, unsigned long *size,
}
#endif
-/*
- * This is the RealView sched_clock implementation. This has
- * a resolution of 41.7ns, and a maximum value of about 179s.
- */
-unsigned long long sched_clock(void)
-{
- unsigned long long v;
-
- v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125;
- do_div(v, 3);
-
- return v;
-}
-
#define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
@@ -273,37 +257,40 @@ struct mmci_platform_data realview_mmc1_plat_data = {
/*
* Clock handling
*/
-static const struct icst307_params realview_oscvco_params = {
- .ref = 24000,
- .vco_max = 200000,
+static const struct icst_params realview_oscvco_params = {
+ .ref = 24000000,
+ .vco_max = ICST307_VCO_MAX,
+ .vco_min = ICST307_VCO_MIN,
.vd_min = 4 + 8,
.vd_max = 511 + 8,
.rd_min = 1 + 2,
.rd_max = 127 + 2,
+ .s2div = icst307_s2div,
+ .idx2s = icst307_idx2s,
};
-static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco)
+static void realview_oscvco_set(struct clk *clk, struct icst_vco vco)
{
void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
- void __iomem *sys_osc;
u32 val;
- if (machine_is_realview_pb1176())
- sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC0_OFFSET;
- else
- sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET;
-
- val = readl(sys_osc) & ~0x7ffff;
+ val = readl(clk->vcoreg) & ~0x7ffff;
val |= vco.v | (vco.r << 9) | (vco.s << 16);
writel(0xa05f, sys_lock);
- writel(val, sys_osc);
+ writel(val, clk->vcoreg);
writel(0, sys_lock);
}
+static const struct clk_ops oscvco_clk_ops = {
+ .round = icst_clk_round,
+ .set = icst_clk_set,
+ .setvco = realview_oscvco_set,
+};
+
static struct clk oscvco_clk = {
+ .ops = &oscvco_clk_ops,
.params = &realview_oscvco_params,
- .setvco = realview_oscvco_set,
};
/*
@@ -346,10 +333,13 @@ static struct clk_lookup lookups[] = {
static int __init clk_init(void)
{
- int i;
+ if (machine_is_realview_pb1176())
+ oscvco_clk.vcoreg = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC0_OFFSET;
+ else
+ oscvco_clk.vcoreg = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET;
+
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
- for (i = 0; i < ARRAY_SIZE(lookups); i++)
- clkdev_add(&lookups[i]);
return 0;
}
arch_initcall(clk_init);
@@ -646,133 +636,6 @@ void __iomem *timer2_va_base;
void __iomem *timer3_va_base;
/*
- * How long is the timer interval?
- */
-#define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
-#if TIMER_INTERVAL >= 0x100000
-#define TIMER_RELOAD (TIMER_INTERVAL >> 8)
-#define TIMER_DIVISOR (TIMER_CTRL_DIV256)
-#define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC)
-#elif TIMER_INTERVAL >= 0x10000
-#define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
-#define TIMER_DIVISOR (TIMER_CTRL_DIV16)
-#define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC)
-#else
-#define TIMER_RELOAD (TIMER_INTERVAL)
-#define TIMER_DIVISOR (TIMER_CTRL_DIV1)
-#define TICKS2USECS(x) ((x) / TICKS_PER_uSEC)
-#endif
-
-static void timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk)
-{
- unsigned long ctrl;
-
- switch(mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- writel(TIMER_RELOAD, timer0_va_base + TIMER_LOAD);
-
- ctrl = TIMER_CTRL_PERIODIC;
- ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE;
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* period set, and timer enabled in 'next_event' hook */
- ctrl = TIMER_CTRL_ONESHOT;
- ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE;
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- default:
- ctrl = 0;
- }
-
- writel(ctrl, timer0_va_base + TIMER_CTRL);
-}
-
-static int timer_set_next_event(unsigned long evt,
- struct clock_event_device *unused)
-{
- unsigned long ctrl = readl(timer0_va_base + TIMER_CTRL);
-
- writel(evt, timer0_va_base + TIMER_LOAD);
- writel(ctrl | TIMER_CTRL_ENABLE, timer0_va_base + TIMER_CTRL);
-
- return 0;
-}
-
-static struct clock_event_device timer0_clockevent = {
- .name = "timer0",
- .shift = 32,
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = timer_set_mode,
- .set_next_event = timer_set_next_event,
- .rating = 300,
- .cpumask = cpu_all_mask,
-};
-
-static void __init realview_clockevents_init(unsigned int timer_irq)
-{
- timer0_clockevent.irq = timer_irq;
- timer0_clockevent.mult =
- div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift);
- timer0_clockevent.max_delta_ns =
- clockevent_delta2ns(0xffffffff, &timer0_clockevent);
- timer0_clockevent.min_delta_ns =
- clockevent_delta2ns(0xf, &timer0_clockevent);
-
- clockevents_register_device(&timer0_clockevent);
-}
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t realview_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &timer0_clockevent;
-
- /* clear the interrupt */
- writel(1, timer0_va_base + TIMER_INTCLR);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction realview_timer_irq = {
- .name = "RealView Timer Tick",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = realview_timer_interrupt,
-};
-
-static cycle_t realview_get_cycles(struct clocksource *cs)
-{
- return ~readl(timer3_va_base + TIMER_VALUE);
-}
-
-static struct clocksource clocksource_realview = {
- .name = "timer3",
- .rating = 200,
- .read = realview_get_cycles,
- .mask = CLOCKSOURCE_MASK(32),
- .shift = 20,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static void __init realview_clocksource_init(void)
-{
- /* setup timer 0 as free-running clocksource */
- writel(0, timer3_va_base + TIMER_CTRL);
- writel(0xffffffff, timer3_va_base + TIMER_LOAD);
- writel(0xffffffff, timer3_va_base + TIMER_VALUE);
- writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
- timer3_va_base + TIMER_CTRL);
-
- clocksource_realview.mult =
- clocksource_khz2mult(1000, clocksource_realview.shift);
- clocksource_register(&clocksource_realview);
-}
-
-/*
* Set up the clock source and clock events devices
*/
void __init realview_timer_init(unsigned int timer_irq)
@@ -799,13 +662,8 @@ void __init realview_timer_init(unsigned int timer_irq)
writel(0, timer2_va_base + TIMER_CTRL);
writel(0, timer3_va_base + TIMER_CTRL);
- /*
- * Make irqs happen for the system timer
- */
- setup_irq(timer_irq, &realview_timer_irq);
-
- realview_clocksource_init();
- realview_clockevents_init(timer_irq);
+ sp804_clocksource_init(timer3_va_base);
+ sp804_clockevents_init(timer0_va_base, timer_irq);
}
/*
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-10 04:24:34 +0000