Merge tag 'mct-exynos-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers

From Kukjin Kim <kgene.kim@samsung.com>:

add support exynos mct device tree and move into drivers/clocksource

* tag 'mct-exynos-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  clocksource: mct: Add terminating entry for exynos_mct_ids table
  clocksource: mct: Add missing semicolons in exynos_mct.c
  ARM: EXYNOS: move mct driver to drivers/clocksource
  ARM: EXYNOS: remove static io-remapping of mct registers for Exynos5
  ARM: dts: add mct device tree node for all supported Exynos SoC's
  ARM: EXYNOS: allow dt based discovery of mct controller using clocksource_of_init
  ARM: EXYNOS: add device tree support for MCT controller driver
  ARM: EXYNOS: prepare an array of MCT interrupt numbers and use it
  ARM: EXYNOS: add a register base address variable in mct controller driver

Conflicts:
	drivers/clocksource/Makefile
	drivers/clocksource/exynos_mct.c

[arnd: adapt to CLOCKSOURCE_OF_DECLARE interface change]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 563 insertions, 1 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 3167fda9bbb3..73fcddb8314d 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -70,3 +70,8 @@ config CLKSRC_METAG_GENERIC
         def_bool y if METAG
         help
           This option enables support for the Meta per-thread timers.
+
+config CLKSRC_EXYNOS_MCT
+        def_bool y if ARCH_EXYNOS
+        help
+          Support for Multi Core Timer controller on Exynos SoCs.
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index e74c8ce26bf0..cd1f09cbd61a 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -19,7 +19,8 @@ obj-$(CONFIG_ARCH_BCM2835)	+= bcm2835_timer.o
 obj-$(CONFIG_SUNXI_TIMER)       += sunxi_timer.o
 obj-$(CONFIG_ARCH_TEGRA)        += tegra20_timer.o
 obj-$(CONFIG_VT8500_TIMER)      += vt8500_timer.o
-obj-$(CONFIG_CADENCE_TTC_TIMER)         += cadence_ttc_timer.o
+obj-$(CONFIG_CADENCE_TTC_TIMER) += cadence_ttc_timer.o
+obj-$(CONFIG_CLKSRC_EXYNOS_MCT) += exynos_mct.o
 
 obj-$(CONFIG_ARM_ARCH_TIMER)            += arm_arch_timer.o
 obj-$(CONFIG_CLKSRC_METAG_GENERIC)      += metag_generic.o
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
new file mode 100644
index 000000000000..957af8636c9d
--- /dev/null
+++ b/drivers/clocksource/exynos_mct.c
@@ -0,0 +1,556 @@
+/* linux/arch/arm/mach-exynos4/mct.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * EXYNOS4 MCT(Multi-Core Timer) support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/percpu.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/clocksource.h>
+
+#include <asm/arch_timer.h>
+#include <asm/localtimer.h>
+
+#include <plat/cpu.h>
+
+#include <mach/map.h>
+#include <mach/irqs.h>
+#include <asm/mach/time.h>
+
+#define EXYNOS4_MCTREG(x)               (x)
+#define EXYNOS4_MCT_G_CNT_L             EXYNOS4_MCTREG(0x100)
+#define EXYNOS4_MCT_G_CNT_U             EXYNOS4_MCTREG(0x104)
+#define EXYNOS4_MCT_G_CNT_WSTAT         EXYNOS4_MCTREG(0x110)
+#define EXYNOS4_MCT_G_COMP0_L           EXYNOS4_MCTREG(0x200)
+#define EXYNOS4_MCT_G_COMP0_U           EXYNOS4_MCTREG(0x204)
+#define EXYNOS4_MCT_G_COMP0_ADD_INCR    EXYNOS4_MCTREG(0x208)
+#define EXYNOS4_MCT_G_TCON              EXYNOS4_MCTREG(0x240)
+#define EXYNOS4_MCT_G_INT_CSTAT         EXYNOS4_MCTREG(0x244)
+#define EXYNOS4_MCT_G_INT_ENB           EXYNOS4_MCTREG(0x248)
+#define EXYNOS4_MCT_G_WSTAT             EXYNOS4_MCTREG(0x24C)
+#define _EXYNOS4_MCT_L_BASE             EXYNOS4_MCTREG(0x300)
+#define EXYNOS4_MCT_L_BASE(x)           (_EXYNOS4_MCT_L_BASE + (0x100 * x))
+#define EXYNOS4_MCT_L_MASK              (0xffffff00)
+
+#define MCT_L_TCNTB_OFFSET              (0x00)
+#define MCT_L_ICNTB_OFFSET              (0x08)
+#define MCT_L_TCON_OFFSET               (0x20)
+#define MCT_L_INT_CSTAT_OFFSET          (0x30)
+#define MCT_L_INT_ENB_OFFSET            (0x34)
+#define MCT_L_WSTAT_OFFSET              (0x40)
+#define MCT_G_TCON_START                (1 << 8)
+#define MCT_G_TCON_COMP0_AUTO_INC       (1 << 1)
+#define MCT_G_TCON_COMP0_ENABLE         (1 << 0)
+#define MCT_L_TCON_INTERVAL_MODE        (1 << 2)
+#define MCT_L_TCON_INT_START            (1 << 1)
+#define MCT_L_TCON_TIMER_START          (1 << 0)
+
+#define TICK_BASE_CNT   1
+
+enum {
+        MCT_INT_SPI,
+        MCT_INT_PPI
+};
+
+enum {
+        MCT_G0_IRQ,
+        MCT_G1_IRQ,
+        MCT_G2_IRQ,
+        MCT_G3_IRQ,
+        MCT_L0_IRQ,
+        MCT_L1_IRQ,
+        MCT_L2_IRQ,
+        MCT_L3_IRQ,
+        MCT_NR_IRQS,
+};
+
+static void __iomem *reg_base;
+static unsigned long clk_rate;
+static unsigned int mct_int_type;
+static int mct_irqs[MCT_NR_IRQS];
+
+struct mct_clock_event_device {
+        struct clock_event_device *evt;
+        unsigned long base;
+        char name[10];
+};
+
+static void exynos4_mct_write(unsigned int value, unsigned long offset)
+{
+        unsigned long stat_addr;
+        u32 mask;
+        u32 i;
+
+        __raw_writel(value, reg_base + offset);
+
+        if (likely(offset >= EXYNOS4_MCT_L_BASE(0))) {
+                stat_addr = (offset & ~EXYNOS4_MCT_L_MASK) + MCT_L_WSTAT_OFFSET;
+                switch (offset & EXYNOS4_MCT_L_MASK) {
+                case MCT_L_TCON_OFFSET:
+                        mask = 1 << 3;          /* L_TCON write status */
+                        break;
+                case MCT_L_ICNTB_OFFSET:
+                        mask = 1 << 1;          /* L_ICNTB write status */
+                        break;
+                case MCT_L_TCNTB_OFFSET:
+                        mask = 1 << 0;          /* L_TCNTB write status */
+                        break;
+                default:
+                        return;
+                }
+        } else {
+                switch (offset) {
+                case EXYNOS4_MCT_G_TCON:
+                        stat_addr = EXYNOS4_MCT_G_WSTAT;
+                        mask = 1 << 16;         /* G_TCON write status */
+                        break;
+                case EXYNOS4_MCT_G_COMP0_L:
+                        stat_addr = EXYNOS4_MCT_G_WSTAT;
+                        mask = 1 << 0;          /* G_COMP0_L write status */
+                        break;
+                case EXYNOS4_MCT_G_COMP0_U:
+                        stat_addr = EXYNOS4_MCT_G_WSTAT;
+                        mask = 1 << 1;          /* G_COMP0_U write status */
+                        break;
+                case EXYNOS4_MCT_G_COMP0_ADD_INCR:
+                        stat_addr = EXYNOS4_MCT_G_WSTAT;
+                        mask = 1 << 2;          /* G_COMP0_ADD_INCR w status */
+                        break;
+                case EXYNOS4_MCT_G_CNT_L:
+                        stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
+                        mask = 1 << 0;          /* G_CNT_L write status */
+                        break;
+                case EXYNOS4_MCT_G_CNT_U:
+                        stat_addr = EXYNOS4_MCT_G_CNT_WSTAT;
+                        mask = 1 << 1;          /* G_CNT_U write status */
+                        break;
+                default:
+                        return;
+                }
+        }
+
+        /* Wait maximum 1 ms until written values are applied */
+        for (i = 0; i < loops_per_jiffy / 1000 * HZ; i++)
+                if (__raw_readl(reg_base + stat_addr) & mask) {
+                        __raw_writel(mask, reg_base + stat_addr);
+                        return;
+                }
+
+        panic("MCT hangs after writing %d (offset:0x%lx)\n", value, offset);
+}
+
+/* Clocksource handling */
+static void exynos4_mct_frc_start(u32 hi, u32 lo)
+{
+        u32 reg;
+
+        exynos4_mct_write(lo, EXYNOS4_MCT_G_CNT_L);
+        exynos4_mct_write(hi, EXYNOS4_MCT_G_CNT_U);
+
+        reg = __raw_readl(reg_base + EXYNOS4_MCT_G_TCON);
+        reg |= MCT_G_TCON_START;
+        exynos4_mct_write(reg, EXYNOS4_MCT_G_TCON);
+}
+
+static cycle_t exynos4_frc_read(struct clocksource *cs)
+{
+        unsigned int lo, hi;
+        u32 hi2 = __raw_readl(reg_base + EXYNOS4_MCT_G_CNT_U);
+
+        do {
+                hi = hi2;
+                lo = __raw_readl(reg_base + EXYNOS4_MCT_G_CNT_L);
+                hi2 = __raw_readl(reg_base + EXYNOS4_MCT_G_CNT_U);
+        } while (hi != hi2);
+
+        return ((cycle_t)hi << 32) | lo;
+}
+
+static void exynos4_frc_resume(struct clocksource *cs)
+{
+        exynos4_mct_frc_start(0, 0);
+}
+
+struct clocksource mct_frc = {
+        .name           = "mct-frc",
+        .rating         = 400,
+        .read           = exynos4_frc_read,
+        .mask           = CLOCKSOURCE_MASK(64),
+        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
+        .resume         = exynos4_frc_resume,
+};
+
+static void __init exynos4_clocksource_init(void)
+{
+        exynos4_mct_frc_start(0, 0);
+
+        if (clocksource_register_hz(&mct_frc, clk_rate))
+                panic("%s: can't register clocksource\n", mct_frc.name);
+}
+
+static void exynos4_mct_comp0_stop(void)
+{
+        unsigned int tcon;
+
+        tcon = __raw_readl(reg_base + EXYNOS4_MCT_G_TCON);
+        tcon &= ~(MCT_G_TCON_COMP0_ENABLE | MCT_G_TCON_COMP0_AUTO_INC);
+
+        exynos4_mct_write(tcon, EXYNOS4_MCT_G_TCON);
+        exynos4_mct_write(0, EXYNOS4_MCT_G_INT_ENB);
+}
+
+static void exynos4_mct_comp0_start(enum clock_event_mode mode,
+                                    unsigned long cycles)
+{
+        unsigned int tcon;
+        cycle_t comp_cycle;
+
+        tcon = __raw_readl(reg_base + EXYNOS4_MCT_G_TCON);
+
+        if (mode == CLOCK_EVT_MODE_PERIODIC) {
+                tcon |= MCT_G_TCON_COMP0_AUTO_INC;
+                exynos4_mct_write(cycles, EXYNOS4_MCT_G_COMP0_ADD_INCR);
+        }
+
+        comp_cycle = exynos4_frc_read(&mct_frc) + cycles;
+        exynos4_mct_write((u32)comp_cycle, EXYNOS4_MCT_G_COMP0_L);
+        exynos4_mct_write((u32)(comp_cycle >> 32), EXYNOS4_MCT_G_COMP0_U);
+
+        exynos4_mct_write(0x1, EXYNOS4_MCT_G_INT_ENB);
+
+        tcon |= MCT_G_TCON_COMP0_ENABLE;
+        exynos4_mct_write(tcon , EXYNOS4_MCT_G_TCON);
+}
+
+static int exynos4_comp_set_next_event(unsigned long cycles,
+                                       struct clock_event_device *evt)
+{
+        exynos4_mct_comp0_start(evt->mode, cycles);
+
+        return 0;
+}
+
+static void exynos4_comp_set_mode(enum clock_event_mode mode,
+                                  struct clock_event_device *evt)
+{
+        unsigned long cycles_per_jiffy;
+        exynos4_mct_comp0_stop();
+
+        switch (mode) {
+        case CLOCK_EVT_MODE_PERIODIC:
+                cycles_per_jiffy =
+                        (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift);
+                exynos4_mct_comp0_start(mode, cycles_per_jiffy);
+                break;
+
+        case CLOCK_EVT_MODE_ONESHOT:
+        case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_SHUTDOWN:
+        case CLOCK_EVT_MODE_RESUME:
+                break;
+        }
+}
+
+static struct clock_event_device mct_comp_device = {
+        .name           = "mct-comp",
+        .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+        .rating         = 250,
+        .set_next_event = exynos4_comp_set_next_event,
+        .set_mode       = exynos4_comp_set_mode,
+};
+
+static irqreturn_t exynos4_mct_comp_isr(int irq, void *dev_id)
+{
+        struct clock_event_device *evt = dev_id;
+
+        exynos4_mct_write(0x1, EXYNOS4_MCT_G_INT_CSTAT);
+
+        evt->event_handler(evt);
+
+        return IRQ_HANDLED;
+}
+
+static struct irqaction mct_comp_event_irq = {
+        .name           = "mct_comp_irq",
+        .flags          = IRQF_TIMER | IRQF_IRQPOLL,
+        .handler        = exynos4_mct_comp_isr,
+        .dev_id         = &mct_comp_device,
+};
+
+static void exynos4_clockevent_init(void)
+{
+        mct_comp_device.cpumask = cpumask_of(0);
+        clockevents_config_and_register(&mct_comp_device, clk_rate,
+                                        0xf, 0xffffffff);
+        setup_irq(mct_irqs[MCT_G0_IRQ], &mct_comp_event_irq);
+}
+
+#ifdef CONFIG_LOCAL_TIMERS
+
+static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick);
+
+/* Clock event handling */
+static void exynos4_mct_tick_stop(struct mct_clock_event_device *mevt)
+{
+        unsigned long tmp;
+        unsigned long mask = MCT_L_TCON_INT_START | MCT_L_TCON_TIMER_START;
+        unsigned long offset = mevt->base + MCT_L_TCON_OFFSET;
+
+        tmp = __raw_readl(reg_base + offset);
+        if (tmp & mask) {
+                tmp &= ~mask;
+                exynos4_mct_write(tmp, offset);
+        }
+}
+
+static void exynos4_mct_tick_start(unsigned long cycles,
+                                   struct mct_clock_event_device *mevt)
+{
+        unsigned long tmp;
+
+        exynos4_mct_tick_stop(mevt);
+
+        tmp = (1 << 31) | cycles;       /* MCT_L_UPDATE_ICNTB */
+
+        /* update interrupt count buffer */
+        exynos4_mct_write(tmp, mevt->base + MCT_L_ICNTB_OFFSET);
+
+        /* enable MCT tick interrupt */
+        exynos4_mct_write(0x1, mevt->base + MCT_L_INT_ENB_OFFSET);
+
+        tmp = __raw_readl(reg_base + mevt->base + MCT_L_TCON_OFFSET);
+        tmp |= MCT_L_TCON_INT_START | MCT_L_TCON_TIMER_START |
+               MCT_L_TCON_INTERVAL_MODE;
+        exynos4_mct_write(tmp, mevt->base + MCT_L_TCON_OFFSET);
+}
+
+static int exynos4_tick_set_next_event(unsigned long cycles,
+                                       struct clock_event_device *evt)
+{
+        struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
+
+        exynos4_mct_tick_start(cycles, mevt);
+
+        return 0;
+}
+
+static inline void exynos4_tick_set_mode(enum clock_event_mode mode,
+                                         struct clock_event_device *evt)
+{
+        struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
+        unsigned long cycles_per_jiffy;
+
+        exynos4_mct_tick_stop(mevt);
+
+        switch (mode) {
+        case CLOCK_EVT_MODE_PERIODIC:
+                cycles_per_jiffy =
+                        (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift);
+                exynos4_mct_tick_start(cycles_per_jiffy, mevt);
+                break;
+
+        case CLOCK_EVT_MODE_ONESHOT:
+        case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_SHUTDOWN:
+        case CLOCK_EVT_MODE_RESUME:
+                break;
+        }
+}
+
+static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt)
+{
+        struct clock_event_device *evt = mevt->evt;
+
+        /*
+         * This is for supporting oneshot mode.
+         * Mct would generate interrupt periodically
+         * without explicit stopping.
+         */
+        if (evt->mode != CLOCK_EVT_MODE_PERIODIC)
+                exynos4_mct_tick_stop(mevt);
+
+        /* Clear the MCT tick interrupt */
+        if (__raw_readl(reg_base + mevt->base + MCT_L_INT_CSTAT_OFFSET) & 1) {
+                exynos4_mct_write(0x1, mevt->base + MCT_L_INT_CSTAT_OFFSET);
+                return 1;
+        } else {
+                return 0;
+        }
+}
+
+static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id)
+{
+        struct mct_clock_event_device *mevt = dev_id;
+        struct clock_event_device *evt = mevt->evt;
+
+        exynos4_mct_tick_clear(mevt);
+
+        evt->event_handler(evt);
+
+        return IRQ_HANDLED;
+}
+
+static struct irqaction mct_tick0_event_irq = {
+        .name           = "mct_tick0_irq",
+        .flags          = IRQF_TIMER | IRQF_NOBALANCING,
+        .handler        = exynos4_mct_tick_isr,
+};
+
+static struct irqaction mct_tick1_event_irq = {
+        .name           = "mct_tick1_irq",
+        .flags          = IRQF_TIMER | IRQF_NOBALANCING,
+        .handler        = exynos4_mct_tick_isr,
+};
+
+static int __cpuinit exynos4_local_timer_setup(struct clock_event_device *evt)
+{
+        struct mct_clock_event_device *mevt;
+        unsigned int cpu = smp_processor_id();
+
+        mevt = this_cpu_ptr(&percpu_mct_tick);
+        mevt->evt = evt;
+
+        mevt->base = EXYNOS4_MCT_L_BASE(cpu);
+        sprintf(mevt->name, "mct_tick%d", cpu);
+
+        evt->name = mevt->name;
+        evt->cpumask = cpumask_of(cpu);
+        evt->set_next_event = exynos4_tick_set_next_event;
+        evt->set_mode = exynos4_tick_set_mode;
+        evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+        evt->rating = 450;
+        clockevents_config_and_register(evt, clk_rate / (TICK_BASE_CNT + 1),
+                                        0xf, 0x7fffffff);
+
+        exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
+
+        if (mct_int_type == MCT_INT_SPI) {
+                if (cpu == 0) {
+                        mct_tick0_event_irq.dev_id = mevt;
+                        evt->irq = mct_irqs[MCT_L0_IRQ];
+                        setup_irq(evt->irq, &mct_tick0_event_irq);
+                } else {
+                        mct_tick1_event_irq.dev_id = mevt;
+                        evt->irq = mct_irqs[MCT_L1_IRQ];
+                        setup_irq(evt->irq, &mct_tick1_event_irq);
+                        irq_set_affinity(evt->irq, cpumask_of(1));
+                }
+        } else {
+                enable_percpu_irq(mct_irqs[MCT_L0_IRQ], 0);
+        }
+
+        return 0;
+}
+
+static void exynos4_local_timer_stop(struct clock_event_device *evt)
+{
+        unsigned int cpu = smp_processor_id();
+        evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
+        if (mct_int_type == MCT_INT_SPI)
+                if (cpu == 0)
+                        remove_irq(evt->irq, &mct_tick0_event_irq);
+                else
+                        remove_irq(evt->irq, &mct_tick1_event_irq);
+        else
+                disable_percpu_irq(mct_irqs[MCT_L0_IRQ]);
+}
+
+static struct local_timer_ops exynos4_mct_tick_ops __cpuinitdata = {
+        .setup  = exynos4_local_timer_setup,
+        .stop   = exynos4_local_timer_stop,
+};
+#endif /* CONFIG_LOCAL_TIMERS */
+
+static void __init exynos4_timer_resources(void __iomem *base)
+{
+        struct clk *mct_clk;
+        mct_clk = clk_get(NULL, "xtal");
+
+        clk_rate = clk_get_rate(mct_clk);
+
+        reg_base = base;
+        if (!reg_base)
+                panic("%s: unable to ioremap mct address space\n", __func__);
+
+#ifdef CONFIG_LOCAL_TIMERS
+        if (mct_int_type == MCT_INT_PPI) {
+                int err;
+
+                err = request_percpu_irq(mct_irqs[MCT_L0_IRQ],
+                                         exynos4_mct_tick_isr, "MCT",
+                                         &percpu_mct_tick);
+                WARN(err, "MCT: can't request IRQ %d (%d)\n",
+                     mct_irqs[MCT_L0_IRQ], err);
+        }
+
+        local_timer_register(&exynos4_mct_tick_ops);
+#endif /* CONFIG_LOCAL_TIMERS */
+}
+
+void __init mct_init(void)
+{
+        if (soc_is_exynos4210()) {
+                mct_irqs[MCT_G0_IRQ] = EXYNOS4_IRQ_MCT_G0;
+                mct_irqs[MCT_L0_IRQ] = EXYNOS4_IRQ_MCT_L0;
+                mct_irqs[MCT_L1_IRQ] = EXYNOS4_IRQ_MCT_L1;
+                mct_int_type = MCT_INT_SPI;
+        } else {
+                panic("unable to determine mct controller type\n");
+        }
+
+        exynos4_timer_resources(S5P_VA_SYSTIMER);
+        exynos4_clocksource_init();
+        exynos4_clockevent_init();
+}
+
+static void __init mct_init_dt(struct device_node *np, unsigned int int_type)
+{
+        u32 nr_irqs, i;
+
+        mct_int_type = int_type;
+
+        /* This driver uses only one global timer interrupt */
+        mct_irqs[MCT_G0_IRQ] = irq_of_parse_and_map(np, MCT_G0_IRQ);
+
+        /*
+         * Find out the number of local irqs specified. The local
+         * timer irqs are specified after the four global timer
+         * irqs are specified.
+         */
+        nr_irqs = of_irq_count(np);
+        for (i = MCT_L0_IRQ; i < nr_irqs; i++)
+                mct_irqs[i] = irq_of_parse_and_map(np, i);
+
+        exynos4_timer_resources(of_iomap(np, 0));
+        exynos4_clocksource_init();
+        exynos4_clockevent_init();
+}
+
+
+static void __init mct_init_spi(struct device_node *np)
+{
+        return mct_init_dt(np, MCT_INT_SPI);
+}
+
+static void __init mct_init_ppi(struct device_node *np)
+{
+        return mct_init_dt(np, MCT_INT_PPI);
+}
+CLOCKSOURCE_OF_DECLARE(exynos4210, "samsung,exynos4210-mct", mct_init_spi);
+CLOCKSOURCE_OF_DECLARE(exynos4412, "samsung,exynos4412-mct", mct_init_ppi);