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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2018-09-20 16:35:26 +0200
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2018-09-28 14:21:01 +0200
commit6a5f2a1f4dcdb31fde467d9ae612505692eb4243 (patch)
treec9468825c5b51dd5a08d31d4ebc211faedfe5f87 /drivers/rtc
parentcfb74916e2ecf018e3189959edd2a1356b2fd89e (diff)
downloadlinux-6a5f2a1f4dcdb31fde467d9ae612505692eb4243.tar.bz2
rtc: ds1307: use rtc_add_group
Register frequency test using rtc_add_group to avoid a possible race condition and simplify the code. This also moves the attribute to its proper location under the rtc device instead of the i2c parent device. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-ds1307.c53
1 files changed, 14 insertions, 39 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index edccd0c0da25..982503a168d0 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -1050,11 +1050,11 @@ static int m41txx_rtc_set_offset(struct device *dev, long offset)
ctrl_reg);
}
-static ssize_t frequency_test_enable_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t frequency_test_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
- struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev->parent);
bool freq_test_en;
int ret;
@@ -1070,11 +1070,11 @@ static ssize_t frequency_test_enable_store(struct device *dev,
return count;
}
-static ssize_t frequency_test_enable_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t frequency_test_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ struct ds1307 *ds1307 = dev_get_drvdata(dev->parent);
unsigned int ctrl_reg;
regmap_read(ds1307->regmap, M41TXX_REG_CONTROL, &ctrl_reg);
@@ -1083,10 +1083,10 @@ static ssize_t frequency_test_enable_show(struct device *dev,
"off\n");
}
-static DEVICE_ATTR_RW(frequency_test_enable);
+static DEVICE_ATTR_RW(frequency_test);
static struct attribute *rtc_freq_test_attrs[] = {
- &dev_attr_frequency_test_enable.attr,
+ &dev_attr_frequency_test.attr,
NULL,
};
@@ -1094,13 +1094,6 @@ static const struct attribute_group rtc_freq_test_attr_group = {
.attrs = rtc_freq_test_attrs,
};
-static void rtc_calib_remove_sysfs_group(void *_dev)
-{
- struct device *dev = _dev;
-
- sysfs_remove_group(&dev->kobj, &rtc_freq_test_attr_group);
-}
-
static int ds1307_add_frequency_test(struct ds1307 *ds1307)
{
int err;
@@ -1109,27 +1102,9 @@ static int ds1307_add_frequency_test(struct ds1307 *ds1307)
case m41t0:
case m41t00:
case m41t11:
- /* Export sysfs entries */
- err = sysfs_create_group(&(ds1307->dev)->kobj,
- &rtc_freq_test_attr_group);
- if (err) {
- dev_err(ds1307->dev,
- "Failed to create sysfs group: %d\n",
- err);
- return err;
- }
-
- err = devm_add_action_or_reset(ds1307->dev,
- rtc_calib_remove_sysfs_group,
- ds1307->dev);
- if (err) {
- dev_err(ds1307->dev,
- "Failed to add sysfs cleanup action: %d\n",
- err);
- sysfs_remove_group(&(ds1307->dev)->kobj,
- &rtc_freq_test_attr_group);
+ err = rtc_add_group(ds1307->rtc, &rtc_freq_test_attr_group);
+ if (err)
return err;
- }
break;
default:
break;
@@ -1876,11 +1851,11 @@ read_rtc:
}
ds1307->rtc->ops = chip->rtc_ops ?: &ds13xx_rtc_ops;
- err = rtc_register_device(ds1307->rtc);
+ err = ds1307_add_frequency_test(ds1307);
if (err)
return err;
- err = ds1307_add_frequency_test(ds1307);
+ err = rtc_register_device(ds1307->rtc);
if (err)
return err;