Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / arm / mach-omap1 / time.c

diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index 1be6a214d88de2d5cbc77dd259c84a42f7548f06..6885d2fac183d69e3ad8861d4c2bde464485adcb 100644 (file)
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -49,9 +49,14 @@
 #include <mach/hardware.h>
 #include <asm/leds.h>
 #include <asm/irq.h>
+#include <asm/sched_clock.h>
+
 #include <asm/mach/irq.h>
 #include <asm/mach/time.h>
 
+#include <plat/common.h>
+
+#ifdef CONFIG_OMAP_MPU_TIMER
 
 #define OMAP_MPU_TIMER_BASE            OMAP_MPU_TIMER1_BASE
 #define OMAP_MPU_TIMER_OFFSET          0x100
@@ -66,7 +71,7 @@ typedef struct {
 ((volatile omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE +       \
                                 (n)*OMAP_MPU_TIMER_OFFSET))
 
-static inline unsigned long omap_mpu_timer_read(int nr)
+static inline unsigned long notrace omap_mpu_timer_read(int nr)
 {
        volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
        return timer->read_tim;
@@ -208,31 +213,49 @@ static struct clocksource clocksource_mpu = {
        .rating         = 300,
        .read           = mpu_read,
        .mask           = CLOCKSOURCE_MASK(32),
-       .shift          = 24,
        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
+static DEFINE_CLOCK_DATA(cd);
+
+static inline unsigned long long notrace _omap_mpu_sched_clock(void)
+{
+       u32 cyc = mpu_read(&clocksource_mpu);
+       return cyc_to_sched_clock(&cd, cyc, (u32)~0);
+}
+
+#ifndef CONFIG_OMAP_32K_TIMER
+unsigned long long notrace sched_clock(void)
+{
+       return _omap_mpu_sched_clock();
+}
+#else
+static unsigned long long notrace omap_mpu_sched_clock(void)
+{
+       return _omap_mpu_sched_clock();
+}
+#endif
+
+static void notrace mpu_update_sched_clock(void)
+{
+       u32 cyc = mpu_read(&clocksource_mpu);
+       update_sched_clock(&cd, cyc, (u32)~0);
+}
+
 static void __init omap_init_clocksource(unsigned long rate)
 {
        static char err[] __initdata = KERN_ERR
                        "%s: can't register clocksource!\n";
 
-       clocksource_mpu.mult
-               = clocksource_khz2mult(rate/1000, clocksource_mpu.shift);
-
        setup_irq(INT_TIMER2, &omap_mpu_timer2_irq);
        omap_mpu_timer_start(1, ~0, 1);
+       init_sched_clock(&cd, mpu_update_sched_clock, 32, rate);
 
-       if (clocksource_register(&clocksource_mpu))
+       if (clocksource_register_hz(&clocksource_mpu, rate))
                printk(err, clocksource_mpu.name);
 }
 
-/*
- * ---------------------------------------------------------------------------
- * Timer initialization
- * ---------------------------------------------------------------------------
- */
-static void __init omap_timer_init(void)
+static void __init omap_mpu_timer_init(void)
 {
        struct clk      *ck_ref = clk_get(NULL, "ck_ref");
        unsigned long   rate;
@@ -249,6 +272,66 @@ static void __init omap_timer_init(void)
        omap_init_clocksource(rate);
 }
 
+#else
+static inline void omap_mpu_timer_init(void)
+{
+       pr_err("Bogus timer, should not happen\n");
+}
+#endif /* CONFIG_OMAP_MPU_TIMER */
+
+#if defined(CONFIG_OMAP_MPU_TIMER) && defined(CONFIG_OMAP_32K_TIMER)
+static unsigned long long (*preferred_sched_clock)(void);
+
+unsigned long long notrace sched_clock(void)
+{
+       if (!preferred_sched_clock)
+               return 0;
+
+       return preferred_sched_clock();
+}
+
+static inline void preferred_sched_clock_init(bool use_32k_sched_clock)
+{
+       if (use_32k_sched_clock)
+               preferred_sched_clock = omap_32k_sched_clock;
+       else
+               preferred_sched_clock = omap_mpu_sched_clock;
+}
+#else
+static inline void preferred_sched_clock_init(bool use_32k_sched_clcok)
+{
+}
+#endif
+
+static inline int omap_32k_timer_usable(void)
+{
+       int res = false;
+
+       if (cpu_is_omap730() || cpu_is_omap15xx())
+               return res;
+
+#ifdef CONFIG_OMAP_32K_TIMER
+       res = omap_32k_timer_init();
+#endif
+
+       return res;
+}
+
+/*
+ * ---------------------------------------------------------------------------
+ * Timer initialization
+ * ---------------------------------------------------------------------------
+ */
+static void __init omap_timer_init(void)
+{
+       if (omap_32k_timer_usable()) {
+               preferred_sched_clock_init(1);
+       } else {
+               omap_mpu_timer_init();
+               preferred_sched_clock_init(0);
+       }
+}
+
 struct sys_timer omap_timer = {
        .init           = omap_timer_init,
 };