Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer changes from Ingo Molnar:
 "Various clocksource driver updates: extend the core with memory mapped
  hardware (mmio) support and add new (ARM) Moxart SoC and sun4i
  hardware support"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  clocksource: arch_timer: Add support for memory mapped timers
  clocksource: arch_timer: Push the read/write wrappers deeper
  Documentation: Add memory mapped ARM architected timer binding
  clocksource: arch_timer: Pass clock event to set_mode callback
  clocksource: arch_timer: Make register accessors less error-prone
  ARM: clocksource: moxart: documentation: Update device tree bindings document
  ARM: clocksource: moxart: Add bitops.h include
  ARM: clocksource: moxart: documentation: Fix device tree bindings document
  ARM: clocksource: Add support for MOXA ART SoCs
  clocksource: cadence_ttc: Reuse clocksource as sched_clock
  clocksource: cadence_ttc: Remove unused header
  clocksource: sun4i: Fix bug when switching from periodic to oneshot modes
  clocksource: sun4i: Cleanup parent clock setup
  clocksource: sun4i: Remove TIMER_SCAL variable
  clocksource: sun4i: Factor out some timer code
  clocksource: sun4i: Fix the next event code
  clocksource: sun4i: Don't forget to enable the clock we use
  clocksource: sun4i: Add clocksource and sched clock drivers
  clocksource: sun4i: rename AUTORELOAD define to RELOAD
  clocksource: sun4i: Wrap macros arguments in parenthesis
  ...

Documentation/devicetree/bindings/arm/arch_timer.txt

 * ARM architected timer
 
-ARM cores may have a per-core architected timer, which provides per-cpu timers.
+ARM cores may have a per-core architected timer, which provides per-cpu timers,
+or a memory mapped architected timer, which provides up to 8 frames with a
+physical and optional virtual timer per frame.
 
-The timer is attached to a GIC to deliver its per-processor interrupts.
+The per-core architected timer is attached to a GIC to deliver its
+per-processor interrupts via PPIs. The memory mapped timer is attached to a GIC
+to deliver its interrupts via SPIs.
 
-** Timer node properties:
+** CP15 Timer node properties:
 
 - compatible : Should at least contain one of
 	"arm,armv7-timer"
@@ -26,3 +30,52 @@ Example:
 			     <1 10 0xf08>;
 		clock-frequency = <100000000>;
 	};
+
+** Memory mapped timer node properties:
+
+- compatible : Should at least contain "arm,armv7-timer-mem".
+
+- clock-frequency : The frequency of the main counter, in Hz. Optional.
+
+- reg : The control frame base address.
+
+Note that #address-cells, #size-cells, and ranges shall be present to ensure
+the CPU can address a frame's registers.
+
+A timer node has up to 8 frame sub-nodes, each with the following properties:
+
+- frame-number: 0 to 7.
+
+- interrupts : Interrupt list for physical and virtual timers in that order.
+  The virtual timer interrupt is optional.
+
+- reg : The first and second view base addresses in that order. The second view
+  base address is optional.
+
+- status : "disabled" indicates the frame is not available for use. Optional.
+
+Example:
+
+	timer@f0000000 {
+		compatible = "arm,armv7-timer-mem";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		reg = <0xf0000000 0x1000>;
+		clock-frequency = <50000000>;
+
+		frame@f0001000 {
+			frame-number = <0>
+			interrupts = <0 13 0x8>,
+				     <0 14 0x8>;
+			reg = <0xf0001000 0x1000>,
+			      <0xf0002000 0x1000>;
+		};
+
+		frame@f0003000 {
+			frame-number = <1>
+			interrupts = <0 15 0x8>;
+			reg = <0xf0003000 0x1000>;
+			status = "disabled";
+		};
+	};

Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt

+MOXA ART timer
+
+Required properties:
+
+- compatible : Must be "moxa,moxart-timer"
+- reg : Should contain registers location and length
+- interrupts : Should contain the timer interrupt number
+- clocks : Should contain phandle for the clock that drives the counter
+
+Example:
+
+	timer: timer@98400000 {
+		compatible = "moxa,moxart-timer";
+		reg = <0x98400000 0x42>;
+		interrupts = <19 1>;
+		clocks = <&coreclk>;
+	};

MAINTAINERS

@@ -2125,6 +2125,13 @@ M:	Russell King <linux@arm.linux.org.uk>
 S:	Maintained
 F:	include/linux/clk.h
 
+CLOCKSOURCE, CLOCKEVENT DRIVERS
+M:	Daniel Lezcano <daniel.lezcano@linaro.org>
+M:	Thomas Gleixner <tglx@linutronix.de>
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
+S:	Supported
+F:	drivers/clocksource
+
 CISCO FCOE HBA DRIVER
 M:	Hiral Patel <hiralpat@cisco.com>
 M:	Suma Ramars <sramars@cisco.com>
@@ -7156,7 +7163,7 @@ S:	Maintained
 F:	include/linux/mmc/dw_mmc.h
 F:	drivers/mmc/host/dw_mmc*
 
-TIMEKEEPING, NTP
+TIMEKEEPING, CLOCKSOURCE CORE, NTP
 M:	John Stultz <john.stultz@linaro.org>
 M:	Thomas Gleixner <tglx@linutronix.de>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
@@ -7169,7 +7176,6 @@ F:	include/uapi/linux/timex.h
 F:	kernel/time/clocksource.c
 F:	kernel/time/time*.c
 F:	kernel/time/ntp.c
-F:	drivers/clocksource
 
 TLG2300 VIDEO4LINUX-2 DRIVER
 M:	Huang Shijie <shijie8@gmail.com>

arch/arm/include/asm/arch_timer.h

@@ -17,7 +17,8 @@ int arch_timer_arch_init(void);
  * nicely work out which register we want, and chuck away the rest of
  * the code. At least it does so with a recent GCC (4.6.3).
  */
-static inline void arch_timer_reg_write(const int access, const int reg, u32 val)
+static __always_inline
+void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val)
 {
 	if (access == ARCH_TIMER_PHYS_ACCESS) {
 		switch (reg) {
@@ -28,9 +29,7 @@ static inline void arch_timer_reg_write(const int access, const int reg, u32 val
 			asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" (val));
 			break;
 		}
-	}
-
-	if (access == ARCH_TIMER_VIRT_ACCESS) {
+	} else if (access == ARCH_TIMER_VIRT_ACCESS) {
 		switch (reg) {
 		case ARCH_TIMER_REG_CTRL:
 			asm volatile("mcr p15, 0, %0, c14, c3, 1" : : "r" (val));
@@ -44,7 +43,8 @@ static inline void arch_timer_reg_write(const int access, const int reg, u32 val
 	isb();
 }
 
-static inline u32 arch_timer_reg_read(const int access, const int reg)
+static __always_inline
+u32 arch_timer_reg_read_cp15(int access, enum arch_timer_reg reg)
 {
 	u32 val = 0;
 
@@ -57,9 +57,7 @@ static inline u32 arch_timer_reg_read(const int access, const int reg)
 			asm volatile("mrc p15, 0, %0, c14, c2, 0" : "=r" (val));
 			break;
 		}
-	}
-
-	if (access == ARCH_TIMER_VIRT_ACCESS) {
+	} else if (access == ARCH_TIMER_VIRT_ACCESS) {
 		switch (reg) {
 		case ARCH_TIMER_REG_CTRL:
 			asm volatile("mrc p15, 0, %0, c14, c3, 1" : "=r" (val));

arch/arm64/include/asm/arch_timer.h

@@ -26,7 +26,13 @@
 
 #include <clocksource/arm_arch_timer.h>
 
-static inline void arch_timer_reg_write(int access, int reg, u32 val)
+/*
+ * These register accessors are marked inline so the compiler can
+ * nicely work out which register we want, and chuck away the rest of
+ * the code.
+ */
+static __always_inline
+void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val)
 {
 	if (access == ARCH_TIMER_PHYS_ACCESS) {
 		switch (reg) {
@@ -36,8 +42,6 @@ static inline void arch_timer_reg_write(int access, int reg, u32 val)
 		case ARCH_TIMER_REG_TVAL:
 			asm volatile("msr cntp_tval_el0, %0" : : "r" (val));
 			break;
-		default:
-			BUILD_BUG();
 		}
 	} else if (access == ARCH_TIMER_VIRT_ACCESS) {
 		switch (reg) {
@@ -47,17 +51,14 @@ static inline void arch_timer_reg_write(int access, int reg, u32 val)
 		case ARCH_TIMER_REG_TVAL:
 			asm volatile("msr cntv_tval_el0, %0" : : "r" (val));
 			break;
-		default:
-			BUILD_BUG();
 		}
-	} else {
-		BUILD_BUG();
 	}
 
 	isb();
 }
 
-static inline u32 arch_timer_reg_read(int access, int reg)
+static __always_inline
+u32 arch_timer_reg_read_cp15(int access, enum arch_timer_reg reg)
 {
 	u32 val;
 
@@ -69,8 +70,6 @@ static inline u32 arch_timer_reg_read(int access, int reg)
 		case ARCH_TIMER_REG_TVAL:
 			asm volatile("mrs %0, cntp_tval_el0" : "=r" (val));
 			break;
-		default:
-			BUILD_BUG();
 		}
 	} else if (access == ARCH_TIMER_VIRT_ACCESS) {
 		switch (reg) {
@@ -80,11 +79,7 @@ static inline u32 arch_timer_reg_read(int access, int reg)
 		case ARCH_TIMER_REG_TVAL:
 			asm volatile("mrs %0, cntv_tval_el0" : "=r" (val));
 			break;
-		default:
-			BUILD_BUG();
 		}
-	} else {
-		BUILD_BUG();
 	}
 
 	return val;

drivers/clocksource/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_ARMADA_370_XP_TIMER)	+= time-armada-370-xp.o
 obj-$(CONFIG_ORION_TIMER)	+= time-orion.o
 obj-$(CONFIG_ARCH_BCM2835)	+= bcm2835_timer.o
 obj-$(CONFIG_ARCH_MARCO)	+= timer-marco.o
+obj-$(CONFIG_ARCH_MOXART)	+= moxart_timer.o
 obj-$(CONFIG_ARCH_MXS)		+= mxs_timer.o
 obj-$(CONFIG_ARCH_PRIMA2)	+= timer-prima2.o
 obj-$(CONFIG_SUN4I_TIMER)	+= sun4i_timer.o

drivers/clocksource/cadence_ttc_timer.c

@@ -21,7 +21,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/slab.h>
-#include <linux/clk-provider.h>
+#include <linux/sched_clock.h>
 
 /*
  * This driver configures the 2 16-bit count-up timers as follows:
@@ -95,6 +95,8 @@ struct ttc_timer_clockevent {
 #define to_ttc_timer_clkevent(x) \
 		container_of(x, struct ttc_timer_clockevent, ce)
 
+static void __iomem *ttc_sched_clock_val_reg;
+
 /**
  * ttc_set_interval - Set the timer interval value
  *
@@ -156,6 +158,11 @@ static cycle_t __ttc_clocksource_read(struct clocksource *cs)
 				TTC_COUNT_VAL_OFFSET);
 }
 
+static u32 notrace ttc_sched_clock_read(void)
+{
+	return __raw_readl(ttc_sched_clock_val_reg);
+}
+
 /**
  * ttc_set_next_event - Sets the time interval for next event
  *
@@ -297,6 +304,10 @@ static void __init ttc_setup_clocksource(struct clk *clk, void __iomem *base)
 		kfree(ttccs);
 		return;
 	}
+
+	ttc_sched_clock_val_reg = base + TTC_COUNT_VAL_OFFSET;
+	setup_sched_clock(ttc_sched_clock_read, 16,
+			clk_get_rate(ttccs->ttc.clk) / PRESCALE);
 }
 
 static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,

drivers/clocksource/moxart_timer.c

+/*
+ * MOXA ART SoCs timer handling.
+ *
+ * Copyright (C) 2013 Jonas Jensen
+ *
+ * Jonas Jensen <jonas.jensen@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqreturn.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+#include <linux/clocksource.h>
+#include <linux/bitops.h>
+
+#define TIMER1_BASE		0x00
+#define TIMER2_BASE		0x10
+#define TIMER3_BASE		0x20
+
+#define REG_COUNT		0x0 /* writable */
+#define REG_LOAD		0x4
+#define REG_MATCH1		0x8
+#define REG_MATCH2		0xC
+
+#define TIMER_CR		0x30
+#define TIMER_INTR_STATE	0x34
+#define TIMER_INTR_MASK		0x38
+
+/*
+ * TIMER_CR flags:
+ *
+ * TIMEREG_CR_*_CLOCK	0: PCLK, 1: EXT1CLK
+ * TIMEREG_CR_*_INT	overflow interrupt enable bit
+ */
+#define TIMEREG_CR_1_ENABLE	BIT(0)
+#define TIMEREG_CR_1_CLOCK	BIT(1)
+#define TIMEREG_CR_1_INT	BIT(2)
+#define TIMEREG_CR_2_ENABLE	BIT(3)
+#define TIMEREG_CR_2_CLOCK	BIT(4)
+#define TIMEREG_CR_2_INT	BIT(5)
+#define TIMEREG_CR_3_ENABLE	BIT(6)
+#define TIMEREG_CR_3_CLOCK	BIT(7)
+#define TIMEREG_CR_3_INT	BIT(8)
+#define TIMEREG_CR_COUNT_UP	BIT(9)
+
+#define TIMER1_ENABLE		(TIMEREG_CR_2_ENABLE | TIMEREG_CR_1_ENABLE)
+#define TIMER1_DISABLE		(TIMEREG_CR_2_ENABLE)
+
+static void __iomem *base;
+static unsigned int clock_count_per_tick;
+
+static void moxart_clkevt_mode(enum clock_event_mode mode,
+			       struct clock_event_device *clk)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_RESUME:
+	case CLOCK_EVT_MODE_ONESHOT:
+		writel(TIMER1_DISABLE, base + TIMER_CR);
+		writel(~0, base + TIMER1_BASE + REG_LOAD);
+		break;
+	case CLOCK_EVT_MODE_PERIODIC:
+		writel(clock_count_per_tick, base + TIMER1_BASE + REG_LOAD);
+		writel(TIMER1_ENABLE, base + TIMER_CR);
+		break;
+	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_SHUTDOWN:
+	default:
+		writel(TIMER1_DISABLE, base + TIMER_CR);
+		break;
+	}
+}
+
+static int moxart_clkevt_next_event(unsigned long cycles,
+				    struct clock_event_device *unused)
+{
+	u32 u;
+
+	writel(TIMER1_DISABLE, base + TIMER_CR);
+
+	u = readl(base + TIMER1_BASE + REG_COUNT) - cycles;
+	writel(u, base + TIMER1_BASE + REG_MATCH1);
+
+	writel(TIMER1_ENABLE, base + TIMER_CR);
+
+	return 0;
+}
+
+static struct clock_event_device moxart_clockevent = {
+	.name		= "moxart_timer",
+	.rating		= 200,
+	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+	.set_mode	= moxart_clkevt_mode,
+	.set_next_event	= moxart_clkevt_next_event,
+};
+
+static irqreturn_t moxart_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = dev_id;
+	evt->event_handler(evt);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction moxart_timer_irq = {
+	.name		= "moxart-timer",
+	.flags		= IRQF_TIMER,
+	.handler	= moxart_timer_interrupt,
+	.dev_id		= &moxart_clockevent,
+};
+
+static void __init moxart_timer_init(struct device_node *node)
+{
+	int ret, irq;
+	unsigned long pclk;
+	struct clk *clk;
+
+	base = of_iomap(node, 0);
+	if (!base)
+		panic("%s: of_iomap failed\n", node->full_name);
+
+	irq = irq_of_parse_and_map(node, 0);
+	if (irq <= 0)
+		panic("%s: irq_of_parse_and_map failed\n", node->full_name);
+
+	ret = setup_irq(irq, &moxart_timer_irq);
+	if (ret)
+		panic("%s: setup_irq failed\n", node->full_name);
+
+	clk = of_clk_get(node, 0);
+	if (IS_ERR(clk))
+		panic("%s: of_clk_get failed\n", node->full_name);
+
+	pclk = clk_get_rate(clk);
+
+	if (clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
+				  "moxart_timer", pclk, 200, 32,
+				  clocksource_mmio_readl_down))
+		panic("%s: clocksource_mmio_init failed\n", node->full_name);
+
+	clock_count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ);
+
+	writel(~0, base + TIMER2_BASE + REG_LOAD);
+	writel(TIMEREG_CR_2_ENABLE, base + TIMER_CR);
+
+	moxart_clockevent.cpumask = cpumask_of(0);
+	moxart_clockevent.irq = irq;
+
+	/*
+	 * documentation is not publicly available:
+	 * min_delta / max_delta obtained by trial-and-error,
+	 * max_delta 0xfffffffe should be ok because count
+	 * register size is u32
+	 */
+	clockevents_config_and_register(&moxart_clockevent, pclk,
+					0x4, 0xfffffffe);
+}
+CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", moxart_timer_init);

drivers/clocksource/sun4i_timer.c

@@ -19,42 +19,83 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqreturn.h>
+#include <linux/sched_clock.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 
 #define TIMER_IRQ_EN_REG	0x00
-#define TIMER_IRQ_EN(val)		(1 << val)
+#define TIMER_IRQ_EN(val)		BIT(val)
 #define TIMER_IRQ_ST_REG	0x04
 #define TIMER_CTL_REG(val)	(0x10 * val + 0x10)
-#define TIMER_CTL_ENABLE		(1 << 0)
-#define TIMER_CTL_AUTORELOAD		(1 << 1)
-#define TIMER_CTL_ONESHOT		(1 << 7)
-#define TIMER_INTVAL_REG(val)	(0x10 * val + 0x14)
-#define TIMER_CNTVAL_REG(val)	(0x10 * val + 0x18)
-
-#define TIMER_SCAL		16
+#define TIMER_CTL_ENABLE		BIT(0)
+#define TIMER_CTL_RELOAD		BIT(1)
+#define TIMER_CTL_CLK_SRC(val)		(((val) & 0x3) << 2)
+#define TIMER_CTL_CLK_SRC_OSC24M		(1)
+#define TIMER_CTL_CLK_PRES(val)		(((val) & 0x7) << 4)
+#define TIMER_CTL_ONESHOT		BIT(7)
+#define TIMER_INTVAL_REG(val)	(0x10 * (val) + 0x14)
+#define TIMER_CNTVAL_REG(val)	(0x10 * (val) + 0x18)
 
 static void __iomem *timer_base;
+static u32 ticks_per_jiffy;
+
+/*
+ * When we disable a timer, we need to wait at least for 2 cycles of
+ * the timer source clock. We will use for that the clocksource timer
+ * that is already setup and runs at the same frequency than the other
+ * timers, and we never will be disabled.
+ */
+static void sun4i_clkevt_sync(void)
+{
+	u32 old = readl(timer_base + TIMER_CNTVAL_REG(1));
+
+	while ((old - readl(timer_base + TIMER_CNTVAL_REG(1))) < 3)
+		cpu_relax();
+}
+
+static void sun4i_clkevt_time_stop(u8 timer)
+{
+	u32 val = readl(timer_base + TIMER_CTL_REG(timer));
+	writel(val & ~TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(timer));
+	sun4i_clkevt_sync();
+}
+
+static void sun4i_clkevt_time_setup(u8 timer, unsigned long delay)
+{
+	writel(delay, timer_base + TIMER_INTVAL_REG(timer));
+}
+
+static void sun4i_clkevt_time_start(u8 timer, bool periodic)
+{
+	u32 val = readl(timer_base + TIMER_CTL_REG(timer));
+
+	if (periodic)
+		val &= ~TIMER_CTL_ONESHOT;
+	else
+		val |= TIMER_CTL_ONESHOT;
+
+	writel(val | TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
+	       timer_base + TIMER_CTL_REG(timer));
+}
 
 static void sun4i_clkevt_mode(enum clock_event_mode mode,
 			      struct clock_event_device *clk)
 {
-	u32 u = readl(timer_base + TIMER_CTL_REG(0));
-
 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
-		u &= ~(TIMER_CTL_ONESHOT);
-		writel(u | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0));
+		sun4i_clkevt_time_stop(0);
+		sun4i_clkevt_time_setup(0, ticks_per_jiffy);
+		sun4i_clkevt_time_start(0, true);
 		break;
-
 	case CLOCK_EVT_MODE_ONESHOT:
-		writel(u | TIMER_CTL_ONESHOT, timer_base + TIMER_CTL_REG(0));
+		sun4i_clkevt_time_stop(0);
+		sun4i_clkevt_time_start(0, false);
 		break;
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	default:
-		writel(u & ~(TIMER_CTL_ENABLE), timer_base + TIMER_CTL_REG(0));
+		sun4i_clkevt_time_stop(0);
 		break;
 	}
 }
@@ -62,10 +103,9 @@ static void sun4i_clkevt_mode(enum clock_event_mode mode,
 static int sun4i_clkevt_next_event(unsigned long evt,
 				   struct clock_event_device *unused)
 {
-	u32 u = readl(timer_base + TIMER_CTL_REG(0));
-	writel(evt, timer_base + TIMER_CNTVAL_REG(0));
-	writel(u | TIMER_CTL_ENABLE | TIMER_CTL_AUTORELOAD,
-	       timer_base + TIMER_CTL_REG(0));
+	sun4i_clkevt_time_stop(0);
+	sun4i_clkevt_time_setup(0, evt);
+	sun4i_clkevt_time_start(0, false);
 
 	return 0;
 }
@@ -96,6 +136,11 @@ static struct irqaction sun4i_timer_irq = {
 	.dev_id = &sun4i_clockevent,
 };
 
+static u32 sun4i_timer_sched_read(void)
+{
+	return ~readl(timer_base + TIMER_CNTVAL_REG(1));
+}
+
 static void __init sun4i_timer_init(struct device_node *node)
 {
 	unsigned long rate = 0;
@@ -114,22 +159,23 @@ static void __init sun4i_timer_init(struct device_node *node)
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk))
 		panic("Can't get timer clock");
+	clk_prepare_enable(clk);
 
 	rate = clk_get_rate(clk);
 
-	writel(rate / (TIMER_SCAL * HZ),
-	       timer_base + TIMER_INTVAL_REG(0));
+	writel(~0, timer_base + TIMER_INTVAL_REG(1));
+	writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD |
+	       TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
+	       timer_base + TIMER_CTL_REG(1));
+
+	setup_sched_clock(sun4i_timer_sched_read, 32, rate);
+	clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name,
+			      rate, 300, 32, clocksource_mmio_readl_down);
 
-	/* set clock source to HOSC, 16 pre-division */
-	val = readl(timer_base + TIMER_CTL_REG(0));
-	val &= ~(0x07 << 4);
-	val &= ~(0x03 << 2);
-	val |= (4 << 4) | (1 << 2);
-	writel(val, timer_base + TIMER_CTL_REG(0));
+	ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
 
-	/* set mode to auto reload */
-	val = readl(timer_base + TIMER_CTL_REG(0));
-	writel(val | TIMER_CTL_AUTORELOAD, timer_base + TIMER_CTL_REG(0));
+	writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
+	       timer_base + TIMER_CTL_REG(0));
 
 	ret = setup_irq(irq, &sun4i_timer_irq);
 	if (ret)
@@ -141,8 +187,8 @@ static void __init sun4i_timer_init(struct device_node *node)
 
 	sun4i_clockevent.cpumask = cpumask_of(0);
 
-	clockevents_config_and_register(&sun4i_clockevent, rate / TIMER_SCAL,
-					0x1, 0xff);
+	clockevents_config_and_register(&sun4i_clockevent, rate, 0x1,
+					0xffffffff);
 }
 CLOCKSOURCE_OF_DECLARE(sun4i, "allwinner,sun4i-timer",
 		       sun4i_timer_init);

drivers/clocksource/time-orion.c

@@ -19,7 +19,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/spinlock.h>
-#include <asm/sched_clock.h>
+#include <linux/sched_clock.h>
 
 #define TIMER_CTRL		0x00
 #define  TIMER0_EN		BIT(0)

include/clocksource/arm_arch_timer.h

@@ -23,16 +23,20 @@
 #define ARCH_TIMER_CTRL_IT_MASK		(1 << 1)
 #define ARCH_TIMER_CTRL_IT_STAT		(1 << 2)
 
-#define ARCH_TIMER_REG_CTRL		0
-#define ARCH_TIMER_REG_TVAL		1
+enum arch_timer_reg {
+	ARCH_TIMER_REG_CTRL,
+	ARCH_TIMER_REG_TVAL,
+};
 
 #define ARCH_TIMER_PHYS_ACCESS		0
 #define ARCH_TIMER_VIRT_ACCESS		1
+#define ARCH_TIMER_MEM_PHYS_ACCESS	2
+#define ARCH_TIMER_MEM_VIRT_ACCESS	3
 
 #ifdef CONFIG_ARM_ARCH_TIMER
 
 extern u32 arch_timer_get_rate(void);
-extern u64 arch_timer_read_counter(void);
+extern u64 (*arch_timer_read_counter)(void);
 extern struct timecounter *arch_timer_get_timecounter(void);
 
 #else