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Diffstat (limited to 'arch/arm/mach-msm/timer.c')
-rw-r--r--arch/arm/mach-msm/timer.c121
1 files changed, 52 insertions, 69 deletions
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
index ce389ca4950f..405e8a925202 100644
--- a/arch/arm/mach-msm/timer.c
+++ b/arch/arm/mach-msm/timer.c
@@ -1,6 +1,7 @@
-/* linux/arch/arm/mach-msm/timer.c
+/*
*
* Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@@ -39,7 +40,7 @@
#define GPT_HZ 32768
-#define MSM_GLOBAL_TIMER MSM_CLOCK_DGT
+#define MSM_GLOBAL_TIMER MSM_CLOCK_GPT
/* TODO: Remove these ifdefs */
#if defined(CONFIG_ARCH_QSD8X50)
@@ -153,25 +154,10 @@ static struct msm_clock msm_clocks[] = {
.set_next_event = msm_timer_set_next_event,
.set_mode = msm_timer_set_mode,
},
- .clocksource = {
- .name = "gp_timer",
- .rating = 200,
- .read = msm_read_timer_count,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- },
.irq = INT_GP_TIMER_EXP,
.freq = GPT_HZ,
},
[MSM_CLOCK_DGT] = {
- .clockevent = {
- .name = "dg_timer",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .shift = 32 + MSM_DGT_SHIFT,
- .rating = 300,
- .set_next_event = msm_timer_set_next_event,
- .set_mode = msm_timer_set_mode,
- },
.clocksource = {
.name = "dg_timer",
.rating = 300,
@@ -179,7 +165,6 @@ static struct msm_clock msm_clocks[] = {
.mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
},
- .irq = INT_DEBUG_TIMER_EXP,
.freq = DGT_HZ >> MSM_DGT_SHIFT,
.shift = MSM_DGT_SHIFT,
}
@@ -187,10 +172,13 @@ static struct msm_clock msm_clocks[] = {
static void __init msm_timer_init(void)
{
- int i;
+ struct msm_clock *clock;
+ struct clock_event_device *ce = &msm_clocks[MSM_CLOCK_GPT].clockevent;
+ struct clocksource *cs = &msm_clocks[MSM_CLOCK_DGT].clocksource;
int res;
int global_offset = 0;
+
if (cpu_is_msm7x01()) {
msm_clocks[MSM_CLOCK_GPT].regbase = MSM_CSR_BASE;
msm_clocks[MSM_CLOCK_DGT].regbase = MSM_CSR_BASE + 0x10;
@@ -213,58 +201,55 @@ static void __init msm_timer_init(void)
writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
#endif
- for (i = 0; i < ARRAY_SIZE(msm_clocks); i++) {
- struct msm_clock *clock = &msm_clocks[i];
- struct clock_event_device *ce = &clock->clockevent;
- struct clocksource *cs = &clock->clocksource;
-
- clock->local_counter = clock->regbase + TIMER_COUNT_VAL;
- clock->global_counter = clock->local_counter + global_offset;
-
- writel(0, clock->regbase + TIMER_ENABLE);
- writel(0, clock->regbase + TIMER_CLEAR);
- writel(~0, clock->regbase + TIMER_MATCH_VAL);
+ clock = &msm_clocks[MSM_CLOCK_GPT];
+ clock->local_counter = clock->regbase + TIMER_COUNT_VAL;
- ce->mult = div_sc(clock->freq, NSEC_PER_SEC, ce->shift);
- /* allow at least 10 seconds to notice that the timer wrapped */
- ce->max_delta_ns =
- clockevent_delta2ns(0xf0000000 >> clock->shift, ce);
- /* 4 gets rounded down to 3 */
- ce->min_delta_ns = clockevent_delta2ns(4, ce);
- ce->cpumask = cpumask_of(0);
-
- res = clocksource_register_hz(cs, clock->freq);
- if (res)
- printk(KERN_ERR "msm_timer_init: clocksource_register "
- "failed for %s\n", cs->name);
-
- ce->irq = clock->irq;
- if (cpu_is_msm8x60() || cpu_is_msm8960()) {
- clock->percpu_evt = alloc_percpu(struct clock_event_device *);
- if (!clock->percpu_evt) {
- pr_err("msm_timer_init: memory allocation "
- "failed for %s\n", ce->name);
- continue;
- }
-
- *__this_cpu_ptr(clock->percpu_evt) = ce;
- res = request_percpu_irq(ce->irq, msm_timer_interrupt,
- ce->name, clock->percpu_evt);
- if (!res)
- enable_percpu_irq(ce->irq, 0);
- } else {
- clock->evt = ce;
- res = request_irq(ce->irq, msm_timer_interrupt,
- IRQF_TIMER | IRQF_NOBALANCING | IRQF_TRIGGER_RISING,
- ce->name, &clock->evt);
+ writel_relaxed(0, clock->regbase + TIMER_ENABLE);
+ writel_relaxed(0, clock->regbase + TIMER_CLEAR);
+ writel_relaxed(~0, clock->regbase + TIMER_MATCH_VAL);
+ ce->mult = div_sc(clock->freq, NSEC_PER_SEC, ce->shift);
+ /*
+ * allow at least 10 seconds to notice that the timer
+ * wrapped
+ */
+ ce->max_delta_ns =
+ clockevent_delta2ns(0xf0000000 >> clock->shift, ce);
+ /* 4 gets rounded down to 3 */
+ ce->min_delta_ns = clockevent_delta2ns(4, ce);
+ ce->cpumask = cpumask_of(0);
+
+ ce->irq = clock->irq;
+ if (cpu_is_msm8x60() || cpu_is_msm8960()) {
+ clock->percpu_evt = alloc_percpu(struct clock_event_device *);
+ if (!clock->percpu_evt) {
+ pr_err("memory allocation failed for %s\n", ce->name);
+ goto err;
}
- if (res)
- pr_err("msm_timer_init: request_irq failed for %s\n",
- ce->name);
-
- clockevents_register_device(ce);
+ *__this_cpu_ptr(clock->percpu_evt) = ce;
+ res = request_percpu_irq(ce->irq, msm_timer_interrupt,
+ ce->name, clock->percpu_evt);
+ if (!res)
+ enable_percpu_irq(ce->irq, 0);
+ } else {
+ clock->evt = ce;
+ res = request_irq(ce->irq, msm_timer_interrupt,
+ IRQF_TIMER | IRQF_NOBALANCING |
+ IRQF_TRIGGER_RISING, ce->name, &clock->evt);
}
+
+ if (res)
+ pr_err("request_irq failed for %s\n", ce->name);
+
+ clockevents_register_device(ce);
+err:
+ clock = &msm_clocks[MSM_CLOCK_DGT];
+ clock->local_counter = clock->regbase + TIMER_COUNT_VAL;
+ clock->global_counter = clock->local_counter + global_offset;
+ writel_relaxed(TIMER_ENABLE_EN, clock->regbase + TIMER_ENABLE);
+ res = clocksource_register_hz(cs, clock->freq);
+ if (res)
+ pr_err("clocksource_register failed for %s\n", cs->name);
}
#ifdef CONFIG_LOCAL_TIMERS
@@ -277,8 +262,6 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt)
if (!smp_processor_id())
return 0;
- writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
-
if (!local_timer_inited) {
writel(0, clock->regbase + TIMER_ENABLE);
writel(0, clock->regbase + TIMER_CLEAR);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 16:56:09 +0100