ARM: u300: move timer driver to clocksource

Move the U300 timer driver down to the clocksource driver
subsystem and keep arch/arm clean.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

2 files changed, 1 insertions, 452 deletions

diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
index 0f362b64fb8..3ec74ac95bc 100644
--- a/arch/arm/mach-u300/Makefile
+++ b/arch/arm/mach-u300/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel, U300 machine.
 #
 
-obj-y		:= core.o timer.o
+obj-y		:= core.o
 obj-m		:=
 obj-n		:=
 obj-		:=
diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c
deleted file mode 100644
index fe08fd34c0c..00000000000
--- a/arch/arm/mach-u300/timer.c
+++ /dev/null
@@ -1,451 +0,0 @@
-/*
- *
- * arch/arm/mach-u300/timer.c
- *
- *
- * Copyright (C) 2007-2009 ST-Ericsson AB
- * License terms: GNU General Public License (GPL) version 2
- * Timer COH 901 328, runs the OS timer interrupt.
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- */
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/timex.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/sched_clock.h>
-
-/* Generic stuff */
-#include <asm/mach/map.h>
-#include <asm/mach/time.h>
-
-/*
- * APP side special timer registers
- * This timer contains four timers which can fire an interrupt each.
- * OS (operating system) timer @ 32768 Hz
- * DD (device driver) timer @ 1 kHz
- * GP1 (general purpose 1) timer @ 1MHz
- * GP2 (general purpose 2) timer @ 1MHz
- */
-
-/* Reset OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_ROST					(0x0000)
-#define U300_TIMER_APP_ROST_TIMER_RESET				(0x00000000)
-/* Enable OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_EOST					(0x0004)
-#define U300_TIMER_APP_EOST_TIMER_ENABLE			(0x00000000)
-/* Disable OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_DOST					(0x0008)
-#define U300_TIMER_APP_DOST_TIMER_DISABLE			(0x00000000)
-/* OS Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SOSTM					(0x000c)
-#define U300_TIMER_APP_SOSTM_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_SOSTM_MODE_ONE_SHOT			(0x00000001)
-/* OS Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_OSTS					(0x0010)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_MASK			(0x0000000F)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_IDLE			(0x00000001)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_ACTIVE			(0x00000002)
-#define U300_TIMER_APP_OSTS_ENABLE_IND				(0x00000010)
-#define U300_TIMER_APP_OSTS_MODE_MASK				(0x00000020)
-#define U300_TIMER_APP_OSTS_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_OSTS_MODE_ONE_SHOT			(0x00000020)
-#define U300_TIMER_APP_OSTS_IRQ_ENABLED_IND			(0x00000040)
-#define U300_TIMER_APP_OSTS_IRQ_PENDING_IND			(0x00000080)
-/* OS Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_OSTCC					(0x0014)
-/* OS Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_OSTTC					(0x0018)
-/* OS Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_OSTIE					(0x001c)
-#define U300_TIMER_APP_OSTIE_IRQ_DISABLE			(0x00000000)
-#define U300_TIMER_APP_OSTIE_IRQ_ENABLE				(0x00000001)
-/* OS Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_OSTIA					(0x0020)
-#define U300_TIMER_APP_OSTIA_IRQ_ACK				(0x00000080)
-
-/* Reset DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_RDDT					(0x0040)
-#define U300_TIMER_APP_RDDT_TIMER_RESET				(0x00000000)
-/* Enable DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_EDDT					(0x0044)
-#define U300_TIMER_APP_EDDT_TIMER_ENABLE			(0x00000000)
-/* Disable DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_DDDT					(0x0048)
-#define U300_TIMER_APP_DDDT_TIMER_DISABLE			(0x00000000)
-/* DD Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SDDTM					(0x004c)
-#define U300_TIMER_APP_SDDTM_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_SDDTM_MODE_ONE_SHOT			(0x00000001)
-/* DD Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_DDTS					(0x0050)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_MASK			(0x0000000F)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_IDLE			(0x00000001)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_ACTIVE			(0x00000002)
-#define U300_TIMER_APP_DDTS_ENABLE_IND				(0x00000010)
-#define U300_TIMER_APP_DDTS_MODE_MASK				(0x00000020)
-#define U300_TIMER_APP_DDTS_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_DDTS_MODE_ONE_SHOT			(0x00000020)
-#define U300_TIMER_APP_DDTS_IRQ_ENABLED_IND			(0x00000040)
-#define U300_TIMER_APP_DDTS_IRQ_PENDING_IND			(0x00000080)
-/* DD Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_DDTCC					(0x0054)
-/* DD Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_DDTTC					(0x0058)
-/* DD Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_DDTIE					(0x005c)
-#define U300_TIMER_APP_DDTIE_IRQ_DISABLE			(0x00000000)
-#define U300_TIMER_APP_DDTIE_IRQ_ENABLE				(0x00000001)
-/* DD Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_DDTIA					(0x0060)
-#define U300_TIMER_APP_DDTIA_IRQ_ACK				(0x00000080)
-
-/* Reset GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_RGPT1					(0x0080)
-#define U300_TIMER_APP_RGPT1_TIMER_RESET			(0x00000000)
-/* Enable GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_EGPT1					(0x0084)
-#define U300_TIMER_APP_EGPT1_TIMER_ENABLE			(0x00000000)
-/* Disable GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_DGPT1					(0x0088)
-#define U300_TIMER_APP_DGPT1_TIMER_DISABLE			(0x00000000)
-/* GP1 Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SGPT1M					(0x008c)
-#define U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT			(0x00000001)
-/* GP1 Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT1S					(0x0090)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_MASK			(0x0000000F)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_IDLE			(0x00000001)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_ACTIVE			(0x00000002)
-#define U300_TIMER_APP_GPT1S_ENABLE_IND				(0x00000010)
-#define U300_TIMER_APP_GPT1S_MODE_MASK				(0x00000020)
-#define U300_TIMER_APP_GPT1S_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_GPT1S_MODE_ONE_SHOT			(0x00000020)
-#define U300_TIMER_APP_GPT1S_IRQ_ENABLED_IND			(0x00000040)
-#define U300_TIMER_APP_GPT1S_IRQ_PENDING_IND			(0x00000080)
-/* GP1 Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT1CC					(0x0094)
-/* GP1 Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_GPT1TC					(0x0098)
-/* GP1 Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT1IE					(0x009c)
-#define U300_TIMER_APP_GPT1IE_IRQ_DISABLE			(0x00000000)
-#define U300_TIMER_APP_GPT1IE_IRQ_ENABLE			(0x00000001)
-/* GP1 Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT1IA					(0x00a0)
-#define U300_TIMER_APP_GPT1IA_IRQ_ACK				(0x00000080)
-
-/* Reset GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_RGPT2					(0x00c0)
-#define U300_TIMER_APP_RGPT2_TIMER_RESET			(0x00000000)
-/* Enable GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_EGPT2					(0x00c4)
-#define U300_TIMER_APP_EGPT2_TIMER_ENABLE			(0x00000000)
-/* Disable GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_DGPT2					(0x00c8)
-#define U300_TIMER_APP_DGPT2_TIMER_DISABLE			(0x00000000)
-/* GP2 Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SGPT2M					(0x00cc)
-#define U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_SGPT2M_MODE_ONE_SHOT			(0x00000001)
-/* GP2 Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT2S					(0x00d0)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_MASK			(0x0000000F)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_IDLE			(0x00000001)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_ACTIVE			(0x00000002)
-#define U300_TIMER_APP_GPT2S_ENABLE_IND				(0x00000010)
-#define U300_TIMER_APP_GPT2S_MODE_MASK				(0x00000020)
-#define U300_TIMER_APP_GPT2S_MODE_CONTINUOUS			(0x00000000)
-#define U300_TIMER_APP_GPT2S_MODE_ONE_SHOT			(0x00000020)
-#define U300_TIMER_APP_GPT2S_IRQ_ENABLED_IND			(0x00000040)
-#define U300_TIMER_APP_GPT2S_IRQ_PENDING_IND			(0x00000080)
-/* GP2 Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT2CC					(0x00d4)
-/* GP2 Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_GPT2TC					(0x00d8)
-/* GP2 Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT2IE					(0x00dc)
-#define U300_TIMER_APP_GPT2IE_IRQ_DISABLE			(0x00000000)
-#define U300_TIMER_APP_GPT2IE_IRQ_ENABLE			(0x00000001)
-/* GP2 Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT2IA					(0x00e0)
-#define U300_TIMER_APP_GPT2IA_IRQ_ACK				(0x00000080)
-
-/* Clock request control register - all four timers */
-#define U300_TIMER_APP_CRC					(0x100)
-#define U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE			(0x00000001)
-
-static void __iomem *u300_timer_base;
-
-struct u300_clockevent_data {
-	struct clock_event_device cevd;
-	unsigned ticks_per_jiffy;
-};
-
-/*
- * The u300_set_mode() function is always called first, if we
- * have oneshot timer active, the oneshot scheduling function
- * u300_set_next_event() is called immediately after.
- */
-static void u300_set_mode(enum clock_event_mode mode,
-			  struct clock_event_device *evt)
-{
-	struct u300_clockevent_data *cevdata =
-		container_of(evt, struct u300_clockevent_data, cevd);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		/* Disable interrupts on GPT1 */
-		writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_GPT1IE);
-		/* Disable GP1 while we're reprogramming it. */
-		writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_DGPT1);
-		/*
-		 * Set the periodic mode to a certain number of ticks per
-		 * jiffy.
-		 */
-		writel(cevdata->ticks_per_jiffy,
-		       u300_timer_base + U300_TIMER_APP_GPT1TC);
-		/*
-		 * Set continuous mode, so the timer keeps triggering
-		 * interrupts.
-		 */
-		writel(U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS,
-		       u300_timer_base + U300_TIMER_APP_SGPT1M);
-		/* Enable timer interrupts */
-		writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
-		       u300_timer_base + U300_TIMER_APP_GPT1IE);
-		/* Then enable the OS timer again */
-		writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
-		       u300_timer_base + U300_TIMER_APP_EGPT1);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		/* Just break; here? */
-		/*
-		 * The actual event will be programmed by the next event hook,
-		 * so we just set a dummy value somewhere at the end of the
-		 * universe here.
-		 */
-		/* Disable interrupts on GPT1 */
-		writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_GPT1IE);
-		/* Disable GP1 while we're reprogramming it. */
-		writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_DGPT1);
-		/*
-		 * Expire far in the future, u300_set_next_event() will be
-		 * called soon...
-		 */
-		writel(0xFFFFFFFF, u300_timer_base + U300_TIMER_APP_GPT1TC);
-		/* We run one shot per tick here! */
-		writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
-		       u300_timer_base + U300_TIMER_APP_SGPT1M);
-		/* Enable interrupts for this timer */
-		writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
-		       u300_timer_base + U300_TIMER_APP_GPT1IE);
-		/* Enable timer */
-		writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
-		       u300_timer_base + U300_TIMER_APP_EGPT1);
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		/* Disable interrupts on GP1 */
-		writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_GPT1IE);
-		/* Disable GP1 */
-		writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
-		       u300_timer_base + U300_TIMER_APP_DGPT1);
-		break;
-	case CLOCK_EVT_MODE_RESUME:
-		/* Ignore this call */
-		break;
-	}
-}
-
-/*
- * The app timer in one shot mode obviously has to be reprogrammed
- * in EXACTLY this sequence to work properly. Do NOT try to e.g. replace
- * the interrupt disable + timer disable commands with a reset command,
- * it will fail miserably. Apparently (and I found this the hard way)
- * the timer is very sensitive to the instruction order, though you don't
- * get that impression from the data sheet.
- */
-static int u300_set_next_event(unsigned long cycles,
-			       struct clock_event_device *evt)
-
-{
-	/* Disable interrupts on GPT1 */
-	writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
-	       u300_timer_base + U300_TIMER_APP_GPT1IE);
-	/* Disable GP1 while we're reprogramming it. */
-	writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
-	       u300_timer_base + U300_TIMER_APP_DGPT1);
-	/* Reset the General Purpose timer 1. */
-	writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
-	       u300_timer_base + U300_TIMER_APP_RGPT1);
-	/* IRQ in n * cycles */
-	writel(cycles, u300_timer_base + U300_TIMER_APP_GPT1TC);
-	/*
-	 * We run one shot per tick here! (This is necessary to reconfigure,
-	 * the timer will tilt if you don't!)
-	 */
-	writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
-	       u300_timer_base + U300_TIMER_APP_SGPT1M);
-	/* Enable timer interrupts */
-	writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
-	       u300_timer_base + U300_TIMER_APP_GPT1IE);
-	/* Then enable the OS timer again */
-	writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
-	       u300_timer_base + U300_TIMER_APP_EGPT1);
-	return 0;
-}
-
-static struct u300_clockevent_data u300_clockevent_data = {
-	/* Use general purpose timer 1 as clock event */
-	.cevd = {
-		.name		= "GPT1",
-		/* Reasonably fast and accurate clock event */
-		.rating		= 300,
-		.features	= CLOCK_EVT_FEAT_PERIODIC |
-			CLOCK_EVT_FEAT_ONESHOT,
-		.set_next_event	= u300_set_next_event,
-		.set_mode	= u300_set_mode,
-	},
-};
-
-/* Clock event timer interrupt handler */
-static irqreturn_t u300_timer_interrupt(int irq, void *dev_id)
-{
-	struct clock_event_device *evt = &u300_clockevent_data.cevd;
-	/* ACK/Clear timer IRQ for the APP GPT1 Timer */
-
-	writel(U300_TIMER_APP_GPT1IA_IRQ_ACK,
-		u300_timer_base + U300_TIMER_APP_GPT1IA);
-	evt->event_handler(evt);
-	return IRQ_HANDLED;
-}
-
-static struct irqaction u300_timer_irq = {
-	.name		= "U300 Timer Tick",
-	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-	.handler	= u300_timer_interrupt,
-};
-
-/*
- * Override the global weak sched_clock symbol with this
- * local implementation which uses the clocksource to get some
- * better resolution when scheduling the kernel. We accept that
- * this wraps around for now, since it is just a relative time
- * stamp. (Inspired by OMAP implementation.)
- */
-
-static u64 notrace u300_read_sched_clock(void)
-{
-	return readl(u300_timer_base + U300_TIMER_APP_GPT2CC);
-}
-
-static unsigned long u300_read_current_timer(void)
-{
-	return readl(u300_timer_base + U300_TIMER_APP_GPT2CC);
-}
-
-static struct delay_timer u300_delay_timer;
-
-/*
- * This sets up the system timers, clock source and clock event.
- */
-static void __init u300_timer_init_of(struct device_node *np)
-{
-	unsigned int irq;
-	struct clk *clk;
-	unsigned long rate;
-
-	u300_timer_base = of_iomap(np, 0);
-	if (!u300_timer_base)
-		panic("could not ioremap system timer\n");
-
-	/* Get the IRQ for the GP1 timer */
-	irq = irq_of_parse_and_map(np, 2);
-	if (!irq)
-		panic("no IRQ for system timer\n");
-
-	pr_info("U300 GP1 timer @ base: %p, IRQ: %u\n", u300_timer_base, irq);
-
-	/* Clock the interrupt controller */
-	clk = of_clk_get(np, 0);
-	BUG_ON(IS_ERR(clk));
-	clk_prepare_enable(clk);
-	rate = clk_get_rate(clk);
-
-	u300_clockevent_data.ticks_per_jiffy = DIV_ROUND_CLOSEST(rate, HZ);
-
-	sched_clock_register(u300_read_sched_clock, 32, rate);
-
-	u300_delay_timer.read_current_timer = &u300_read_current_timer;
-	u300_delay_timer.freq = rate;
-	register_current_timer_delay(&u300_delay_timer);
-
-	/*
-	 * Disable the "OS" and "DD" timers - these are designed for Symbian!
-	 * Example usage in cnh1601578 cpu subsystem pd_timer_app.c
-	 */
-	writel(U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE,
-		u300_timer_base + U300_TIMER_APP_CRC);
-	writel(U300_TIMER_APP_ROST_TIMER_RESET,
-		u300_timer_base + U300_TIMER_APP_ROST);
-	writel(U300_TIMER_APP_DOST_TIMER_DISABLE,
-		u300_timer_base + U300_TIMER_APP_DOST);
-	writel(U300_TIMER_APP_RDDT_TIMER_RESET,
-		u300_timer_base + U300_TIMER_APP_RDDT);
-	writel(U300_TIMER_APP_DDDT_TIMER_DISABLE,
-		u300_timer_base + U300_TIMER_APP_DDDT);
-
-	/* Reset the General Purpose timer 1. */
-	writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
-		u300_timer_base + U300_TIMER_APP_RGPT1);
-
-	/* Set up the IRQ handler */
-	setup_irq(irq, &u300_timer_irq);
-
-	/* Reset the General Purpose timer 2 */
-	writel(U300_TIMER_APP_RGPT2_TIMER_RESET,
-		u300_timer_base + U300_TIMER_APP_RGPT2);
-	/* Set this timer to run around forever */
-	writel(0xFFFFFFFFU, u300_timer_base + U300_TIMER_APP_GPT2TC);
-	/* Set continuous mode so it wraps around */
-	writel(U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS,
-	       u300_timer_base + U300_TIMER_APP_SGPT2M);
-	/* Disable timer interrupts */
-	writel(U300_TIMER_APP_GPT2IE_IRQ_DISABLE,
-		u300_timer_base + U300_TIMER_APP_GPT2IE);
-	/* Then enable the GP2 timer to use as a free running us counter */
-	writel(U300_TIMER_APP_EGPT2_TIMER_ENABLE,
-		u300_timer_base + U300_TIMER_APP_EGPT2);
-
-	/* Use general purpose timer 2 as clock source */
-	if (clocksource_mmio_init(u300_timer_base + U300_TIMER_APP_GPT2CC,
-			"GPT2", rate, 300, 32, clocksource_mmio_readl_up))
-		pr_err("timer: failed to initialize U300 clock source\n");
-
-	/* Configure and register the clockevent */
-	clockevents_config_and_register(&u300_clockevent_data.cevd, rate,
-					1, 0xffffffff);
-
-	/*
-	 * TODO: init and register the rest of the timers too, they can be
-	 * used by hrtimers!
-	 */
-}
-
-CLOCKSOURCE_OF_DECLARE(u300_timer, "stericsson,u300-apptimer",
-		       u300_timer_init_of);