lkml.org 
[lkml]   [2011]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 10/10] ARM: Use struct syscore_ops instead of sysdevs for PM in timer and leds
Date
From: Rafael J. Wysocki <rjw@sisk.pl>

Convert arch/arm/kernel/time.c and arch/arm/kernel/leds.c to using
struct syscore_ops for power management instead of sysdev classes
and sysdevs.

This simplifies the code in arch/arm/kernel/time.c quite a bit and is
necessary for removing sysdevs from the kernel entirely in future.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
arch/arm/include/asm/mach/time.h | 1 -
arch/arm/kernel/leds.c | 28 ++++++++++++++++------------
arch/arm/kernel/time.c | 33 +++++++++++----------------------
3 files changed, 27 insertions(+), 35 deletions(-)
Index: linux-2.6/arch/arm/kernel/time.c
===================================================================
--- linux-2.6.orig/arch/arm/kernel/time.c
+++ linux-2.6/arch/arm/kernel/time.c
@@ -21,7 +21,7 @@
#include <linux/timex.h>
#include <linux/errno.h>
#include <linux/profile.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/timer.h>
#include <linux/irq.h>

@@ -117,48 +117,37 @@ void timer_tick(void)
#endif

#if defined(CONFIG_PM) && !defined(CONFIG_GENERIC_CLOCKEVENTS)
-static int timer_suspend(struct sys_device *dev, pm_message_t state)
+static int timer_suspend(void)
{
- struct sys_timer *timer = container_of(dev, struct sys_timer, dev);
-
- if (timer->suspend != NULL)
+ if (system_timer->suspend)
timer->suspend();

return 0;
}

-static int timer_resume(struct sys_device *dev)
+static void timer_resume(void)
{
- struct sys_timer *timer = container_of(dev, struct sys_timer, dev);
-
- if (timer->resume != NULL)
- timer->resume();
-
- return 0;
+ if (system_timer->resume)
+ system_timer->resume();
}
#else
#define timer_suspend NULL
#define timer_resume NULL
#endif

-static struct sysdev_class timer_sysclass = {
- .name = "timer",
+static struct syscore_ops timer_syscore_ops = {
.suspend = timer_suspend,
.resume = timer_resume,
};

-static int __init timer_init_sysfs(void)
+static int __init timer_init_syscore_ops(void)
{
- int ret = sysdev_class_register(&timer_sysclass);
- if (ret == 0) {
- system_timer->dev.cls = &timer_sysclass;
- ret = sysdev_register(&system_timer->dev);
- }
+ register_syscore_ops(&timer_syscore_ops);

- return ret;
+ return 0;
}

-device_initcall(timer_init_sysfs);
+device_initcall(timer_init_syscore_ops);

void __init time_init(void)
{
Index: linux-2.6/arch/arm/include/asm/mach/time.h
===================================================================
--- linux-2.6.orig/arch/arm/include/asm/mach/time.h
+++ linux-2.6/arch/arm/include/asm/mach/time.h
@@ -34,7 +34,6 @@
* timer interrupt which may be pending.
*/
struct sys_timer {
- struct sys_device dev;
void (*init)(void);
void (*suspend)(void);
void (*resume)(void);
Index: linux-2.6/arch/arm/kernel/leds.c
===================================================================
--- linux-2.6.orig/arch/arm/kernel/leds.c
+++ linux-2.6/arch/arm/kernel/leds.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>

#include <asm/leds.h>

@@ -69,36 +70,37 @@ static ssize_t leds_store(struct sys_dev

static SYSDEV_ATTR(event, 0200, NULL, leds_store);

-static int leds_suspend(struct sys_device *dev, pm_message_t state)
+static struct sysdev_class leds_sysclass = {
+ .name = "leds",
+};
+
+static struct sys_device leds_device = {
+ .id = 0,
+ .cls = &leds_sysclass,
+};
+
+static int leds_suspend(void)
{
leds_event(led_stop);
return 0;
}

-static int leds_resume(struct sys_device *dev)
+static void leds_resume(void)
{
leds_event(led_start);
- return 0;
}

-static int leds_shutdown(struct sys_device *dev)
+static void leds_shutdown(void)
{
leds_event(led_halted);
- return 0;
}

-static struct sysdev_class leds_sysclass = {
- .name = "leds",
+static struct syscore_ops leds_syscore_ops = {
.shutdown = leds_shutdown,
.suspend = leds_suspend,
.resume = leds_resume,
};

-static struct sys_device leds_device = {
- .id = 0,
- .cls = &leds_sysclass,
-};
-
static int __init leds_init(void)
{
int ret;
@@ -107,6 +109,8 @@ static int __init leds_init(void)
ret = sysdev_register(&leds_device);
if (ret == 0)
ret = sysdev_create_file(&leds_device, &attr_event);
+ if (ret == 0)
+ register_syscore_ops(&leds_syscore_ops);
return ret;
}



\
 
 \ /
  Last update: 2011-03-13 14:07    [from the cache]
©2003-2011 Jasper Spaans