[linux-2.6-block.git] / drivers / clocksource / time-armada-370-xp.c

/*
 * Marvell Armada 370/XP SoC timer handling.
 *
 * Copyright (C) 2012 Marvell
 *
 * Lior Amsalem <alior@marvell.com>
 * Gregory CLEMENT <gregory.clement@free-electrons.com>
 * Thomas Petazzoni <thomas.petazzoni@free-electrons.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.
 *
 * Timer 0 is used as free-running clocksource, while timer 1 is
 * used as clock_event_device.
 *
 * ---
 * Clocksource driver for Armada 370 and Armada XP SoC.
 * This driver implements one compatible string for each SoC, given
 * each has its own characteristics:
 *
 *   * Armada 370 has no 25 MHz fixed timer.
 *
 *   * Armada XP cannot work properly without such 25 MHz fixed timer as
 *     doing otherwise leads to using a clocksource whose frequency varies
 *     when doing cpufreq frequency changes.
 *
 * See Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/timer.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/sched_clock.h>
#include <linux/percpu.h>

/*
 * Timer block registers.
 */
#define TIMER_CTRL_OFF		0x0000
#define  TIMER0_EN		 BIT(0)
#define  TIMER0_RELOAD_EN	 BIT(1)
#define  TIMER0_25MHZ            BIT(11)
#define  TIMER0_DIV(div)         ((div) << 19)
#define  TIMER1_EN		 BIT(2)
#define  TIMER1_RELOAD_EN	 BIT(3)
#define  TIMER1_25MHZ            BIT(12)
#define  TIMER1_DIV(div)         ((div) << 22)
#define TIMER_EVENTS_STATUS	0x0004
#define  TIMER0_CLR_MASK         (~0x1)
#define  TIMER1_CLR_MASK         (~0x100)
#define TIMER0_RELOAD_OFF	0x0010
#define TIMER0_VAL_OFF		0x0014
#define TIMER1_RELOAD_OFF	0x0018
#define TIMER1_VAL_OFF		0x001c

#define LCL_TIMER_EVENTS_STATUS	0x0028
/* Global timers are connected to the coherency fabric clock, and the
   below divider reduces their incrementing frequency. */
#define TIMER_DIVIDER_SHIFT     5
#define TIMER_DIVIDER           (1 << TIMER_DIVIDER_SHIFT)

/*
 * SoC-specific data.
 */
static void __iomem *timer_base, *local_base;
static unsigned int timer_clk;
static bool timer25Mhz = true;

/*
 * Number of timer ticks per jiffy.
 */
static u32 ticks_per_jiffy;

static struct clock_event_device __percpu *armada_370_xp_evt;

static void timer_ctrl_clrset(u32 clr, u32 set)
{
	writel((readl(timer_base + TIMER_CTRL_OFF) & ~clr) | set,
		timer_base + TIMER_CTRL_OFF);
}

static void local_timer_ctrl_clrset(u32 clr, u32 set)
{
	writel((readl(local_base + TIMER_CTRL_OFF) & ~clr) | set,
		local_base + TIMER_CTRL_OFF);
}

static u64 notrace armada_370_xp_read_sched_clock(void)
{
	return ~readl(timer_base + TIMER0_VAL_OFF);
}

/*
 * Clockevent handling.
 */
static int
armada_370_xp_clkevt_next_event(unsigned long delta,
				struct clock_event_device *dev)
{
	/*
	 * Clear clockevent timer interrupt.
	 */
	writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);

	/*
	 * Setup new clockevent timer value.
	 */
	writel(delta, local_base + TIMER0_VAL_OFF);

	/*
	 * Enable the timer.
	 */
	local_timer_ctrl_clrset(TIMER0_RELOAD_EN,
				TIMER0_EN | TIMER0_DIV(TIMER_DIVIDER_SHIFT));
	return 0;
}

static void
armada_370_xp_clkevt_mode(enum clock_event_mode mode,
			  struct clock_event_device *dev)
{
	if (mode == CLOCK_EVT_MODE_PERIODIC) {

		/*
		 * Setup timer to fire at 1/HZ intervals.
		 */
		writel(ticks_per_jiffy - 1, local_base + TIMER0_RELOAD_OFF);
		writel(ticks_per_jiffy - 1, local_base + TIMER0_VAL_OFF);

		/*
		 * Enable timer.
		 */
		local_timer_ctrl_clrset(0, TIMER0_RELOAD_EN |
					   TIMER0_EN |
					   TIMER0_DIV(TIMER_DIVIDER_SHIFT));
	} else {
		/*
		 * Disable timer.
		 */
		local_timer_ctrl_clrset(TIMER0_EN, 0);

		/*
		 * ACK pending timer interrupt.
		 */
		writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);
	}
}

static int armada_370_xp_clkevt_irq;

static irqreturn_t armada_370_xp_timer_interrupt(int irq, void *dev_id)
{
	/*
	 * ACK timer interrupt and call event handler.
	 */
	struct clock_event_device *evt = dev_id;

	writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);
	evt->event_handler(evt);

	return IRQ_HANDLED;
}

/*
 * Setup the local clock events for a CPU.
 */
static int armada_370_xp_timer_setup(struct clock_event_device *evt)
{
	u32 clr = 0, set = 0;
	int cpu = smp_processor_id();

	if (timer25Mhz)
		set = TIMER0_25MHZ;
	else
		clr = TIMER0_25MHZ;
	local_timer_ctrl_clrset(clr, set);

	evt->name		= "armada_370_xp_per_cpu_tick",
	evt->features		= CLOCK_EVT_FEAT_ONESHOT |
				  CLOCK_EVT_FEAT_PERIODIC;
	evt->shift		= 32,
	evt->rating		= 300,
	evt->set_next_event	= armada_370_xp_clkevt_next_event,
	evt->set_mode		= armada_370_xp_clkevt_mode,
	evt->irq		= armada_370_xp_clkevt_irq;
	evt->cpumask		= cpumask_of(cpu);

	clockevents_config_and_register(evt, timer_clk, 1, 0xfffffffe);
	enable_percpu_irq(evt->irq, 0);

	return 0;
}

static void armada_370_xp_timer_stop(struct clock_event_device *evt)
{
	evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
	disable_percpu_irq(evt->irq);
}

static int armada_370_xp_timer_cpu_notify(struct notifier_block *self,
					   unsigned long action, void *hcpu)
{
	/*
	 * Grab cpu pointer in each case to avoid spurious
	 * preemptible warnings
	 */
	switch (action & ~CPU_TASKS_FROZEN) {
	case CPU_STARTING:
		armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt));
		break;
	case CPU_DYING:
		armada_370_xp_timer_stop(this_cpu_ptr(armada_370_xp_evt));
		break;
	}

	return NOTIFY_OK;
}

static struct notifier_block armada_370_xp_timer_cpu_nb = {
	.notifier_call = armada_370_xp_timer_cpu_notify,
};

static void __init armada_370_xp_timer_common_init(struct device_node *np)
{
	u32 clr = 0, set = 0;
	int res;

	timer_base = of_iomap(np, 0);
	WARN_ON(!timer_base);
	local_base = of_iomap(np, 1);

	if (timer25Mhz)
		set = TIMER0_25MHZ;		
	else
		clr = TIMER0_25MHZ;
	timer_ctrl_clrset(clr, set);
	local_timer_ctrl_clrset(clr, set);

	/*
	 * We use timer 0 as clocksource, and private(local) timer 0
	 * for clockevents
	 */
	armada_370_xp_clkevt_irq = irq_of_parse_and_map(np, 4);

	ticks_per_jiffy = (timer_clk + HZ / 2) / HZ;

	/*
	 * Set scale and timer for sched_clock.
	 */
	sched_clock_register(armada_370_xp_read_sched_clock, 32, timer_clk);

	/*
	 * Setup free-running clocksource timer (interrupts
	 * disabled).
	 */
	writel(0xffffffff, timer_base + TIMER0_VAL_OFF);
	writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF);

	timer_ctrl_clrset(0, TIMER0_EN | TIMER0_RELOAD_EN |
			     TIMER0_DIV(TIMER_DIVIDER_SHIFT));

	clocksource_mmio_init(timer_base + TIMER0_VAL_OFF,
			      "armada_370_xp_clocksource",
			      timer_clk, 300, 32, clocksource_mmio_readl_down);

	register_cpu_notifier(&armada_370_xp_timer_cpu_nb);

	armada_370_xp_evt = alloc_percpu(struct clock_event_device);


	/*
	 * Setup clockevent timer (interrupt-driven).
	 */
	res = request_percpu_irq(armada_370_xp_clkevt_irq,
				armada_370_xp_timer_interrupt,
				"armada_370_xp_per_cpu_tick",
				armada_370_xp_evt);
	/* Immediately configure the timer on the boot CPU */
	if (!res)
		armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt));
}

static void __init armada_xp_timer_init(struct device_node *np)
{
	struct clk *clk = of_clk_get_by_name(np, "fixed");

	/* The 25Mhz fixed clock is mandatory, and must always be available */
	BUG_ON(IS_ERR(clk));
	timer_clk = clk_get_rate(clk);

	armada_370_xp_timer_common_init(np);
}
CLOCKSOURCE_OF_DECLARE(armada_xp, "marvell,armada-xp-timer",
		       armada_xp_timer_init);

static void __init armada_370_timer_init(struct device_node *np)
{
	struct clk *clk = of_clk_get(np, 0);

	BUG_ON(IS_ERR(clk));
	timer_clk = clk_get_rate(clk) / TIMER_DIVIDER;
	timer25Mhz = false;

	armada_370_xp_timer_common_init(np);
}
CLOCKSOURCE_OF_DECLARE(armada_370, "marvell,armada-370-timer",
		       armada_370_timer_init);
Commit	Line	Data
6fe9cbd1 GC	1	/*
	2	* Marvell Armada 370/XP SoC timer handling.
	3	*
	4	* Copyright (C) 2012 Marvell
	5	*
	6	* Lior Amsalem <alior@marvell.com>
	7	* Gregory CLEMENT <gregory.clement@free-electrons.com>
	8	* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
	9	*
	10	* This file is licensed under the terms of the GNU General Public
	11	* License version 2. This program is licensed "as is" without any
	12	* warranty of any kind, whether express or implied.
	13	*
	14	* Timer 0 is used as free-running clocksource, while timer 1 is
	15	* used as clock_event_device.
7cd6392c EG	16	*
	17	* ---
	18	* Clocksource driver for Armada 370 and Armada XP SoC.
	19	* This driver implements one compatible string for each SoC, given
	20	* each has its own characteristics:
	21	*
	22	* * Armada 370 has no 25 MHz fixed timer.
	23	*
	24	* * Armada XP cannot work properly without such 25 MHz fixed timer as
	25	* doing otherwise leads to using a clocksource whose frequency varies
	26	* when doing cpufreq frequency changes.
	27	*
	28	* See Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt
6fe9cbd1 GC	29	*/
	30
	31	#include <linux/init.h>
	32	#include <linux/platform_device.h>
	33	#include <linux/kernel.h>
307c2bf4	34	#include <linux/clk.h>
5ddb6d21	35	#include <linux/cpu.h>
6fe9cbd1 GC	36	#include <linux/timer.h>
	37	#include <linux/clockchips.h>
	38	#include <linux/interrupt.h>
	39	#include <linux/of.h>
	40	#include <linux/of_irq.h>
	41	#include <linux/of_address.h>
	42	#include <linux/irq.h>
	43	#include <linux/module.h>
38ff87f7	44	#include <linux/sched_clock.h>
ddd3f69f	45	#include <linux/percpu.h>
6fe9cbd1 GC	46
	47	/*
	48	* Timer block registers.
	49	*/
	50	#define TIMER_CTRL_OFF 0x0000
ad48bd61 EG	51	#define TIMER0_EN BIT(0)
	52	#define TIMER0_RELOAD_EN BIT(1)
	53	#define TIMER0_25MHZ BIT(11)
6fe9cbd1	54	#define TIMER0_DIV(div) ((div) << 19)
ad48bd61 EG	55	#define TIMER1_EN BIT(2)
	56	#define TIMER1_RELOAD_EN BIT(3)
	57	#define TIMER1_25MHZ BIT(12)
6fe9cbd1 GC	58	#define TIMER1_DIV(div) ((div) << 22)
	59	#define TIMER_EVENTS_STATUS 0x0004
	60	#define TIMER0_CLR_MASK (~0x1)
	61	#define TIMER1_CLR_MASK (~0x100)
	62	#define TIMER0_RELOAD_OFF 0x0010
	63	#define TIMER0_VAL_OFF 0x0014
	64	#define TIMER1_RELOAD_OFF 0x0018
	65	#define TIMER1_VAL_OFF 0x001c
	66
ddd3f69f	67	#define LCL_TIMER_EVENTS_STATUS 0x0028
6fe9cbd1 GC	68	/* Global timers are connected to the coherency fabric clock, and the
	69	below divider reduces their incrementing frequency. */
	70	#define TIMER_DIVIDER_SHIFT 5
	71	#define TIMER_DIVIDER (1 << TIMER_DIVIDER_SHIFT)
	72
	73	/*
	74	* SoC-specific data.
	75	*/
ddd3f69f GC	76	static void __iomem timer_base, local_base;
	77	static unsigned int timer_clk;
	78	static bool timer25Mhz = true;
6fe9cbd1 GC	79
	80	/*
	81	* Number of timer ticks per jiffy.
	82	*/
	83	static u32 ticks_per_jiffy;
	84
5ddb6d21	85	static struct clock_event_device __percpu *armada_370_xp_evt;
ddd3f69f	86
3579698e EG	87	static void timer_ctrl_clrset(u32 clr, u32 set)
	88	{
	89	writel((readl(timer_base + TIMER_CTRL_OFF) & ~clr) \| set,
	90	timer_base + TIMER_CTRL_OFF);
	91	}
	92
	93	static void local_timer_ctrl_clrset(u32 clr, u32 set)
	94	{
	95	writel((readl(local_base + TIMER_CTRL_OFF) & ~clr) \| set,
	96	local_base + TIMER_CTRL_OFF);
	97	}
ddd3f69f	98
d9dbcbe0	99	static u64 notrace armada_370_xp_read_sched_clock(void)
6fe9cbd1 GC	100	{
	101	return ~readl(timer_base + TIMER0_VAL_OFF);
	102	}
	103
	104	/*
	105	* Clockevent handling.
	106	*/
	107	static int
	108	armada_370_xp_clkevt_next_event(unsigned long delta,
	109	struct clock_event_device *dev)
	110	{
6fe9cbd1 GC	111	/*
	112	* Clear clockevent timer interrupt.
	113	*/
ddd3f69f	114	writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);
6fe9cbd1 GC	115
	116	/*
	117	* Setup new clockevent timer value.
	118	*/
ddd3f69f	119	writel(delta, local_base + TIMER0_VAL_OFF);
6fe9cbd1 GC	120
	121	/*
	122	* Enable the timer.
	123	*/
3579698e EG	124	local_timer_ctrl_clrset(TIMER0_RELOAD_EN,
3579698e EG	125	TIMER0_EN \| TIMER0_DIV(TIMER_DIVIDER_SHIFT));
6fe9cbd1 GC	126	return 0;
	127	}
	128
	129	static void
	130	armada_370_xp_clkevt_mode(enum clock_event_mode mode,
	131	struct clock_event_device *dev)
	132	{
6fe9cbd1	133	if (mode == CLOCK_EVT_MODE_PERIODIC) {
ddd3f69f	134
6fe9cbd1 GC	135	/*
	136	* Setup timer to fire at 1/HZ intervals.
	137	*/
ddd3f69f GC	138	writel(ticks_per_jiffy - 1, local_base + TIMER0_RELOAD_OFF);
ddd3f69f GC	139	writel(ticks_per_jiffy - 1, local_base + TIMER0_VAL_OFF);
6fe9cbd1 GC	140
	141	/*
	142	* Enable timer.
	143	*/
3579698e EG	144	local_timer_ctrl_clrset(0, TIMER0_RELOAD_EN \|
	145	TIMER0_EN \|
	146	TIMER0_DIV(TIMER_DIVIDER_SHIFT));
6fe9cbd1 GC	147	} else {
	148	/*
	149	* Disable timer.
	150	*/
3579698e	151	local_timer_ctrl_clrset(TIMER0_EN, 0);
6fe9cbd1 GC	152
	153	/*
	154	* ACK pending timer interrupt.
	155	*/
ddd3f69f	156	writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);
6fe9cbd1 GC	157	}
	158	}
	159
5ddb6d21	160	static int armada_370_xp_clkevt_irq;
6fe9cbd1 GC	161
	162	static irqreturn_t armada_370_xp_timer_interrupt(int irq, void *dev_id)
	163	{
	164	/*
	165	* ACK timer interrupt and call event handler.
	166	*/
5ddb6d21	167	struct clock_event_device *evt = dev_id;
6fe9cbd1	168
ddd3f69f GC	169	writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS);
ddd3f69f GC	170	evt->event_handler(evt);
6fe9cbd1 GC	171
	172	return IRQ_HANDLED;
	173	}
	174
ddd3f69f GC	175	/*
	176	* Setup the local clock events for a CPU.
	177	*/
8c37bb3a	178	static int armada_370_xp_timer_setup(struct clock_event_device *evt)
ddd3f69f	179	{
3579698e	180	u32 clr = 0, set = 0;
ddd3f69f GC	181	int cpu = smp_processor_id();
ddd3f69f GC	182
ddd3f69f	183	if (timer25Mhz)
3579698e	184	set = TIMER0_25MHZ;
ddd3f69f	185	else
3579698e EG	186	clr = TIMER0_25MHZ;
3579698e EG	187	local_timer_ctrl_clrset(clr, set);
ddd3f69f	188
5ddb6d21 SB	189	evt->name = "armada_370_xp_per_cpu_tick",
	190	evt->features = CLOCK_EVT_FEAT_ONESHOT \|
	191	CLOCK_EVT_FEAT_PERIODIC;
	192	evt->shift = 32,
	193	evt->rating = 300,
ddd3f69f GC	194	evt->set_next_event = armada_370_xp_clkevt_next_event,
ddd3f69f GC	195	evt->set_mode = armada_370_xp_clkevt_mode,
5ddb6d21	196	evt->irq = armada_370_xp_clkevt_irq;
ddd3f69f GC	197	evt->cpumask = cpumask_of(cpu);
ddd3f69f GC	198
ddd3f69f GC	199	clockevents_config_and_register(evt, timer_clk, 1, 0xfffffffe);
	200	enable_percpu_irq(evt->irq, 0);
	201
	202	return 0;
	203	}
	204
47dcd356	205	static void armada_370_xp_timer_stop(struct clock_event_device *evt)
ddd3f69f GC	206	{
	207	evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
	208	disable_percpu_irq(evt->irq);
	209	}
	210
47dcd356	211	static int armada_370_xp_timer_cpu_notify(struct notifier_block *self,
5ddb6d21 SB	212	unsigned long action, void *hcpu)
	213	{
	214	/*
	215	* Grab cpu pointer in each case to avoid spurious
	216	* preemptible warnings
	217	*/
	218	switch (action & ~CPU_TASKS_FROZEN) {
	219	case CPU_STARTING:
	220	armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt));
	221	break;
	222	case CPU_DYING:
	223	armada_370_xp_timer_stop(this_cpu_ptr(armada_370_xp_evt));
	224	break;
	225	}
	226
	227	return NOTIFY_OK;
	228	}
	229
47dcd356	230	static struct notifier_block armada_370_xp_timer_cpu_nb = {
5ddb6d21	231	.notifier_call = armada_370_xp_timer_cpu_notify,
6fe9cbd1 GC	232	};
6fe9cbd1 GC	233
7cd6392c	234	static void __init armada_370_xp_timer_common_init(struct device_node *np)
6fe9cbd1	235	{
3579698e	236	u32 clr = 0, set = 0;
ddd3f69f GC	237	int res;
ddd3f69f GC	238
6fe9cbd1 GC	239	timer_base = of_iomap(np, 0);
6fe9cbd1 GC	240	WARN_ON(!timer_base);
ddd3f69f	241	local_base = of_iomap(np, 1);
6fe9cbd1	242
7cd6392c	243	if (timer25Mhz)
a4ae54f9	244	set = TIMER0_25MHZ;
7cd6392c	245	else
3579698e	246	clr = TIMER0_25MHZ;
3579698e EG	247	timer_ctrl_clrset(clr, set);
3579698e EG	248	local_timer_ctrl_clrset(clr, set);
6fe9cbd1	249
ddd3f69f GC	250	/*
	251	* We use timer 0 as clocksource, and private(local) timer 0
	252	* for clockevents
	253	*/
5ddb6d21	254	armada_370_xp_clkevt_irq = irq_of_parse_and_map(np, 4);
6fe9cbd1 GC	255
	256	ticks_per_jiffy = (timer_clk + HZ / 2) / HZ;
	257
	258	/*
	259	* Set scale and timer for sched_clock.
	260	*/
d9dbcbe0	261	sched_clock_register(armada_370_xp_read_sched_clock, 32, timer_clk);
6fe9cbd1 GC	262
	263	/*
	264	* Setup free-running clocksource timer (interrupts
	265	* disabled).
	266	*/
	267	writel(0xffffffff, timer_base + TIMER0_VAL_OFF);
	268	writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF);
	269
3579698e EG	270	timer_ctrl_clrset(0, TIMER0_EN \| TIMER0_RELOAD_EN \|
3579698e EG	271	TIMER0_DIV(TIMER_DIVIDER_SHIFT));
6fe9cbd1 GC	272
	273	clocksource_mmio_init(timer_base + TIMER0_VAL_OFF,
	274	"armada_370_xp_clocksource",
	275	timer_clk, 300, 32, clocksource_mmio_readl_down);
	276
5ddb6d21	277	register_cpu_notifier(&armada_370_xp_timer_cpu_nb);
6fe9cbd1	278
5ddb6d21	279	armada_370_xp_evt = alloc_percpu(struct clock_event_device);
ddd3f69f GC	280
	281
	282	/*
	283	* Setup clockevent timer (interrupt-driven).
	284	*/
5ddb6d21	285	res = request_percpu_irq(armada_370_xp_clkevt_irq,
ddd3f69f	286	armada_370_xp_timer_interrupt,
5ddb6d21 SB	287	"armada_370_xp_per_cpu_tick",
	288	armada_370_xp_evt);
	289	/* Immediately configure the timer on the boot CPU */
	290	if (!res)
	291	armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt));
ddd3f69f	292	}
7cd6392c EG	293
	294	static void __init armada_xp_timer_init(struct device_node *np)
	295	{
5e9fe6cb EG	296	struct clk *clk = of_clk_get_by_name(np, "fixed");
	297
	298	/* The 25Mhz fixed clock is mandatory, and must always be available */
	299	BUG_ON(IS_ERR(clk));
	300	timer_clk = clk_get_rate(clk);
7cd6392c EG	301
	302	armada_370_xp_timer_common_init(np);
	303	}
	304	CLOCKSOURCE_OF_DECLARE(armada_xp, "marvell,armada-xp-timer",
	305	armada_xp_timer_init);
	306
	307	static void __init armada_370_timer_init(struct device_node *np)
	308	{
	309	struct clk *clk = of_clk_get(np, 0);
	310
ec8e5112	311	BUG_ON(IS_ERR(clk));
7cd6392c EG	312	timer_clk = clk_get_rate(clk) / TIMER_DIVIDER;
	313	timer25Mhz = false;
	314
	315	armada_370_xp_timer_common_init(np);
ddd3f69f	316	}
7cd6392c EG	317	CLOCKSOURCE_OF_DECLARE(armada_370, "marvell,armada-370-timer",
7cd6392c EG	318	armada_370_timer_init);