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Merge tag 'remove-local-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/cleanup

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From Stephen Boyd:

Now that we have a generic arch hook for broadcast we can remove the
local timer API entirely. Doing so will reduce code in ARM core, reduce
the architecture dependencies of our timer drivers, and simplify the code
because we no longer go through an architecture layer that is essentially
a hotplug notifier.

* tag 'remove-local-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
  ARM: smp: Remove local timer API
  clocksource: time-armada-370-xp: Divorce from local timer API
  clocksource: time-armada-370-xp: Fix sparse warning
  ARM: msm: Divorce msm_timer from local timer API
  ARM: PRIMA2: Divorce timer-marco from local timer API
  ARM: EXYNOS4: Divorce mct from local timer API
  ARM: OMAP2+: Divorce from local timer API
  ARM: smp_twd: Divorce smp_twd from local timer API
  ARM: smp: Remove duplicate dummy timer implementation

Resolved a large number of conflicts due to __cpuinit cleanups, etc.

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson
2013-07-23 14:51:34 -07:00
parent 3b2f64d00c 060fd3043e
commit 47dcd3563e
19 changed files with 265 additions and 341 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
arch/arm/kernel/smp_twd.c
View File

@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
@@ -24,7 +25,6 @@
#include <asm/smp_plat.h>
#include <asm/smp_twd.h>
#include <asm/localtimer.h>
/* set up by the platform code */
static void __iomem *twd_base;
@@ -33,7 +33,7 @@ static struct clk *twd_clk;
static unsigned long twd_timer_rate;
static DEFINE_PER_CPU(bool, percpu_setup_called);
static struct clock_event_device __percpu **twd_evt;
static struct clock_event_device __percpu *twd_evt;
static int twd_ppi;
static void twd_set_mode(enum clock_event_mode mode,
@@ -90,8 +90,10 @@ static int twd_timer_ack(void)
return 0;
}
static void twd_timer_stop(struct clock_event_device *clk)
static void twd_timer_stop(void)
{
struct clock_event_device *clk = __this_cpu_ptr(twd_evt);
twd_set_mode(CLOCK_EVT_MODE_UNUSED, clk);
disable_percpu_irq(clk->irq);
}
@@ -106,7 +108,7 @@ static void twd_update_frequency(void *new_rate)
{
twd_timer_rate = *((unsigned long *) new_rate);
clockevents_update_freq(*__this_cpu_ptr(twd_evt), twd_timer_rate);
clockevents_update_freq(__this_cpu_ptr(twd_evt), twd_timer_rate);
}
static int twd_rate_change(struct notifier_block *nb,
@@ -132,7 +134,7 @@ static struct notifier_block twd_clk_nb = {
static int twd_clk_init(void)
{
if (twd_evt && *__this_cpu_ptr(twd_evt) && !IS_ERR(twd_clk))
if (twd_evt && __this_cpu_ptr(twd_evt) && !IS_ERR(twd_clk))
return clk_notifier_register(twd_clk, &twd_clk_nb);
return 0;
@@ -151,7 +153,7 @@ static void twd_update_frequency(void *data)
{
twd_timer_rate = clk_get_rate(twd_clk);
clockevents_update_freq(*__this_cpu_ptr(twd_evt), twd_timer_rate);
clockevents_update_freq(__this_cpu_ptr(twd_evt), twd_timer_rate);
}
static int twd_cpufreq_transition(struct notifier_block *nb,
@@ -177,7 +179,7 @@ static struct notifier_block twd_cpufreq_nb = {
static int twd_cpufreq_init(void)
{
if (twd_evt && *__this_cpu_ptr(twd_evt) && !IS_ERR(twd_clk))
if (twd_evt && __this_cpu_ptr(twd_evt) && !IS_ERR(twd_clk))
return cpufreq_register_notifier(&twd_cpufreq_nb,
CPUFREQ_TRANSITION_NOTIFIER);
@@ -228,7 +230,7 @@ static void twd_calibrate_rate(void)
static irqreturn_t twd_handler(int irq, void *dev_id)
{
struct clock_event_device *evt = *(struct clock_event_device **)dev_id;
struct clock_event_device *evt = dev_id;
if (twd_timer_ack()) {
evt->event_handler(evt);
@@ -265,9 +267,9 @@ static void twd_get_clock(struct device_node *np)
/*
* Setup the local clock events for a CPU.
*/
static int twd_timer_setup(struct clock_event_device *clk)
static void twd_timer_setup(void)
{
struct clock_event_device **this_cpu_clk;
struct clock_event_device *clk = __this_cpu_ptr(twd_evt);
int cpu = smp_processor_id();
/*
@@ -276,9 +278,9 @@ static int twd_timer_setup(struct clock_event_device *clk)
*/
if (per_cpu(percpu_setup_called, cpu)) {
__raw_writel(0, twd_base + TWD_TIMER_CONTROL);
clockevents_register_device(*__this_cpu_ptr(twd_evt));
clockevents_register_device(clk);
enable_percpu_irq(clk->irq, 0);
return 0;
return;
}
per_cpu(percpu_setup_called, cpu) = true;
@@ -297,27 +299,37 @@ static int twd_timer_setup(struct clock_event_device *clk)
clk->set_mode = twd_set_mode;
clk->set_next_event = twd_set_next_event;
clk->irq = twd_ppi;
this_cpu_clk = __this_cpu_ptr(twd_evt);
*this_cpu_clk = clk;
clk->cpumask = cpumask_of(cpu);
clockevents_config_and_register(clk, twd_timer_rate,
0xf, 0xffffffff);
enable_percpu_irq(clk->irq, 0);
return 0;
}
static struct local_timer_ops twd_lt_ops = {
.setup = twd_timer_setup,
.stop = twd_timer_stop,
static int twd_timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_STARTING:
twd_timer_setup();
break;
case CPU_DYING:
twd_timer_stop();
break;
}
return NOTIFY_OK;
}
static struct notifier_block twd_timer_cpu_nb = {
.notifier_call = twd_timer_cpu_notify,
};
static int __init twd_local_timer_common_register(struct device_node *np)
{
int err;
twd_evt = alloc_percpu(struct clock_event_device *);
twd_evt = alloc_percpu(struct clock_event_device);
if (!twd_evt) {
err = -ENOMEM;
goto out_free;
@@ -329,12 +341,22 @@ static int __init twd_local_timer_common_register(struct device_node *np)
goto out_free;
}
err = local_timer_register(&twd_lt_ops);
err = register_cpu_notifier(&twd_timer_cpu_nb);
if (err)
goto out_irq;
twd_get_clock(np);
/*
* Immediately configure the timer on the boot CPU, unless we need
* jiffies to be incrementing to calibrate the rate in which case
* setup the timer in late_time_init.
*/
if (twd_timer_rate)
twd_timer_setup();
else
late_time_init = twd_timer_setup;
return 0;
out_irq: