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rtc: class separate device allocation from registration 

Create rtc_allocate_device to allocate memory for a struct rtc_device and
initialize it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
hifive-unleashed-5.1
Alexandre Belloni 2017-07-06 11:41:58 +02:00
parent 9a6757eadc
commit d1bec20fac
1 changed files with 37 additions and 26 deletions
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63
drivers/rtc/class.c
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@ -150,6 +150,41 @@ static SIMPLE_DEV_PM_OPS(rtc_class_dev_pm_ops, rtc_suspend, rtc_resume);
#define RTC_CLASS_DEV_PM_OPS NULL
#endif
static struct rtc_device *rtc_allocate_device(void)
{
struct rtc_device *rtc;
rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return NULL;
device_initialize(&rtc->dev);
rtc->irq_freq = 1;
rtc->max_user_freq = 64;
rtc->dev.class = rtc_class;
rtc->dev.groups = rtc_get_dev_attribute_groups();
rtc->dev.release = rtc_device_release;
mutex_init(&rtc->ops_lock);
spin_lock_init(&rtc->irq_lock);
spin_lock_init(&rtc->irq_task_lock);
init_waitqueue_head(&rtc->irq_queue);
/* Init timerqueue */
timerqueue_init_head(&rtc->timerqueue);
INIT_WORK(&rtc->irqwork, rtc_timer_do_work);
/* Init aie timer */
rtc_timer_init(&rtc->aie_timer, rtc_aie_update_irq, (void *)rtc);
/* Init uie timer */
rtc_timer_init(&rtc->uie_rtctimer, rtc_uie_update_irq, (void *)rtc);
/* Init pie timer */
hrtimer_init(&rtc->pie_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
rtc->pie_timer.function = rtc_pie_update_irq;
rtc->pie_enabled = 0;
return rtc;
}
/**
* rtc_device_register - register w/ RTC class
@ -189,40 +224,16 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
}
}
rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL);
if (rtc == NULL) {
rtc = rtc_allocate_device();
if (!rtc) {
err = -ENOMEM;
goto exit_ida;
}
device_initialize(&rtc->dev);
rtc->id = id;
rtc->ops = ops;
rtc->owner = owner;
rtc->irq_freq = 1;
rtc->max_user_freq = 64;
rtc->dev.parent = dev;
rtc->dev.class = rtc_class;
rtc->dev.groups = rtc_get_dev_attribute_groups();
rtc->dev.release = rtc_device_release;
mutex_init(&rtc->ops_lock);
spin_lock_init(&rtc->irq_lock);
spin_lock_init(&rtc->irq_task_lock);
init_waitqueue_head(&rtc->irq_queue);
/* Init timerqueue */
timerqueue_init_head(&rtc->timerqueue);
INIT_WORK(&rtc->irqwork, rtc_timer_do_work);
/* Init aie timer */
rtc_timer_init(&rtc->aie_timer, rtc_aie_update_irq, (void *)rtc);
/* Init uie timer */
rtc_timer_init(&rtc->uie_rtctimer, rtc_uie_update_irq, (void *)rtc);
/* Init pie timer */
hrtimer_init(&rtc->pie_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
rtc->pie_timer.function = rtc_pie_update_irq;
rtc->pie_enabled = 0;
dev_set_name(&rtc->dev, "rtc%d", id);