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rtc: ab8500: use rtc_add_group 

Use rtc_add_group to add the sysfs group in a race free manner.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2018-09-24 16:49:00 +02:00
parent 1654a2b06b
commit b56295dd33
1 changed files with 17 additions and 24 deletions
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41
drivers/rtc/rtc-ab8500.c
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@ -360,15 +360,14 @@ static DEVICE_ATTR(rtc_calibration, S_IRUGO | S_IWUSR,
ab8500_sysfs_show_rtc_calibration,
ab8500_sysfs_store_rtc_calibration);
static int ab8500_sysfs_rtc_register(struct device *dev)
{
return device_create_file(dev, &dev_attr_rtc_calibration);
}
static struct attribute *ab8500_rtc_attrs[] = {
&dev_attr_rtc_calibration.attr,
NULL
};
static void ab8500_sysfs_rtc_unregister(struct device *dev)
{
device_remove_file(dev, &dev_attr_rtc_calibration);
}
static const struct attribute_group ab8500_rtc_sysfs_files = {
.attrs = ab8500_rtc_attrs,
};
static irqreturn_t rtc_alarm_handler(int irq, void *data)
{
@ -429,14 +428,11 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, true);
rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc",
(struct rtc_class_ops *)platid->driver_data,
THIS_MODULE);
if (IS_ERR(rtc)) {
dev_err(&pdev->dev, "Registration failed\n");
err = PTR_ERR(rtc);
return err;
}
rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
rtc->ops = (struct rtc_class_ops *)platid->driver_data;
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
rtc_alarm_handler, IRQF_ONESHOT,
@ -447,22 +443,19 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
dev_pm_set_wake_irq(&pdev->dev, irq);
platform_set_drvdata(pdev, rtc);
err = ab8500_sysfs_rtc_register(&pdev->dev);
if (err) {
dev_err(&pdev->dev, "sysfs RTC failed to register\n");
return err;
}
rtc->uie_unsupported = 1;
return 0;
err = rtc_add_group(rtc, &ab8500_rtc_sysfs_files);
if (err)
return err;
return rtc_register_device(rtc);
}
static int ab8500_rtc_remove(struct platform_device *pdev)
{
dev_pm_clear_wake_irq(&pdev->dev);
device_init_wakeup(&pdev->dev, false);
ab8500_sysfs_rtc_unregister(&pdev->dev);
return 0;
}