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path: root/drivers/rtc/rtc-sysfs.c
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Diffstat (limited to 'drivers/rtc/rtc-sysfs.c')
-rw-r--r--drivers/rtc/rtc-sysfs.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index 2531ce4c9db0..7dd23a6fc825 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -102,6 +102,19 @@ rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr,
return n;
}
+static ssize_t
+rtc_sysfs_show_hctosys(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+#ifdef CONFIG_RTC_HCTOSYS_DEVICE
+ if (strcmp(dev_name(&to_rtc_device(dev)->dev),
+ CONFIG_RTC_HCTOSYS_DEVICE) == 0)
+ return sprintf(buf, "1\n");
+ else
+#endif
+ return sprintf(buf, "0\n");
+}
+
static struct device_attribute rtc_attrs[] = {
__ATTR(name, S_IRUGO, rtc_sysfs_show_name, NULL),
__ATTR(date, S_IRUGO, rtc_sysfs_show_date, NULL),
@@ -109,6 +122,7 @@ static struct device_attribute rtc_attrs[] = {
__ATTR(since_epoch, S_IRUGO, rtc_sysfs_show_since_epoch, NULL),
__ATTR(max_user_freq, S_IRUGO | S_IWUSR, rtc_sysfs_show_max_user_freq,
rtc_sysfs_set_max_user_freq),
+ __ATTR(hctosys, S_IRUGO, rtc_sysfs_show_hctosys, NULL),
{ },
};