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abituguru: Add suspend/resume support

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This patch contains rudimentary suspend / resume support for the uguru,
this protects the uguru and the driver against suspend / resume cycles,
so there is no reason to unload the driver in your suspend / resume
scripts.

Only include suspend / resume functions when CONFIG_PM is set.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hans de Goede 2006-08-28 14:42:24 +02:00 committed by Greg Kroah-Hartman
parent b17ebc9402
commit 360b9ab220
1 changed files with 28 additions and 2 deletions
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30
drivers/hwmon/abituguru.c
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@ -1354,13 +1354,39 @@ static struct abituguru_data *abituguru_update_device(struct device *dev)
return NULL;
}
#ifdef CONFIG_PM
static int abituguru_suspend(struct platform_device *pdev, pm_message_t state)
{
struct abituguru_data *data = platform_get_drvdata(pdev);
/* make sure all communications with the uguru are done and no new
ones are started */
mutex_lock(&data->update_lock);
return 0;
}
static int abituguru_resume(struct platform_device *pdev)
{
struct abituguru_data *data = platform_get_drvdata(pdev);
/* See if the uGuru is still ready */
if (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT)
data->uguru_ready = 0;
mutex_unlock(&data->update_lock);
return 0;
}
#else
#define abituguru_suspend NULL
#define abituguru_resume NULL
#endif /* CONFIG_PM */
static struct platform_driver abituguru_driver = {
.driver = {
.owner = THIS_MODULE,
.name = ABIT_UGURU_NAME,
},
.probe = abituguru_probe,
.remove = __devexit_p(abituguru_remove),
.probe = abituguru_probe,
.remove = __devexit_p(abituguru_remove),
.suspend = abituguru_suspend,
.resume = abituguru_resume,
};
static int __init abituguru_detect(void)