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Subject[PATCH 01/11] rtc: class separate device allocation from registration
Date
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>
---
drivers/rtc/class.c | 63 +++++++++++++++++++++++++++++++----------------------
1 file changed, 37 insertions(+), 26 deletions(-)

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 543c64cd3df0..fb39c1334d7b 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -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);

--
2.11.0
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