diff options
Diffstat (limited to 'drivers/rtc/rtc-sysfs.c')
| -rw-r--r-- | drivers/rtc/rtc-sysfs.c | 68 |
1 files changed, 39 insertions, 29 deletions
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c index b70e2bb..babd43b 100644 --- a/drivers/rtc/rtc-sysfs.c +++ b/drivers/rtc/rtc-sysfs.c @@ -25,15 +25,14 @@ */ static ssize_t -rtc_sysfs_show_name(struct device *dev, struct device_attribute *attr, - char *buf) +name_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", to_rtc_device(dev)->name); } +static DEVICE_ATTR_RO(name); static ssize_t -rtc_sysfs_show_date(struct device *dev, struct device_attribute *attr, - char *buf) +date_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -46,10 +45,10 @@ rtc_sysfs_show_date(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(date); static ssize_t -rtc_sysfs_show_time(struct device *dev, struct device_attribute *attr, - char *buf) +time_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -62,10 +61,10 @@ rtc_sysfs_show_time(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(time); static ssize_t -rtc_sysfs_show_since_epoch(struct device *dev, struct device_attribute *attr, - char *buf) +since_epoch_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t retval; struct rtc_time tm; @@ -79,16 +78,16 @@ rtc_sysfs_show_since_epoch(struct device *dev, struct device_attribute *attr, return retval; } +static DEVICE_ATTR_RO(since_epoch); static ssize_t -rtc_sysfs_show_max_user_freq(struct device *dev, struct device_attribute *attr, - char *buf) +max_user_freq_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", to_rtc_device(dev)->max_user_freq); } static ssize_t -rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr, +max_user_freq_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct rtc_device *rtc = to_rtc_device(dev); @@ -101,6 +100,7 @@ rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr, return n; } +static DEVICE_ATTR_RW(max_user_freq); /** * rtc_sysfs_show_hctosys - indicate if the given RTC set the system time @@ -109,8 +109,7 @@ rtc_sysfs_set_max_user_freq(struct device *dev, struct device_attribute *attr, * boot or resume event. */ static ssize_t -rtc_sysfs_show_hctosys(struct device *dev, struct device_attribute *attr, - char *buf) +hctosys_show(struct device *dev, struct device_attribute *attr, char *buf) { #ifdef CONFIG_RTC_HCTOSYS_DEVICE if (rtc_hctosys_ret == 0 && @@ -121,17 +120,18 @@ rtc_sysfs_show_hctosys(struct device *dev, struct device_attribute *attr, #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), - __ATTR(time, S_IRUGO, rtc_sysfs_show_time, NULL), - __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), - { }, +static DEVICE_ATTR_RO(hctosys); + +static struct attribute *rtc_attrs[] = { + &dev_attr_name.attr, + &dev_attr_date.attr, + &dev_attr_time.attr, + &dev_attr_since_epoch.attr, + &dev_attr_max_user_freq.attr, + &dev_attr_hctosys.attr, + NULL, }; +ATTRIBUTE_GROUPS(rtc); static ssize_t rtc_sysfs_show_wakealarm(struct device *dev, struct device_attribute *attr, @@ -164,6 +164,7 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, { ssize_t retval; unsigned long now, alarm; + unsigned long push = 0; struct rtc_wkalrm alm; struct rtc_device *rtc = to_rtc_device(dev); char *buf_ptr; @@ -180,13 +181,17 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, buf_ptr = (char *)buf; if (*buf_ptr == '+') { buf_ptr++; - adjust = 1; + if (*buf_ptr == '=') { + buf_ptr++; + push = 1; + } else + adjust = 1; } alarm = simple_strtoul(buf_ptr, NULL, 0); if (adjust) { alarm += now; } - if (alarm > now) { + if (alarm > now || push) { /* Avoid accidentally clobbering active alarms; we can't * entirely prevent that here, without even the minimal * locking from the /dev/rtcN api. @@ -194,9 +199,14 @@ rtc_sysfs_set_wakealarm(struct device *dev, struct device_attribute *attr, retval = rtc_read_alarm(rtc, &alm); if (retval < 0) return retval; - if (alm.enabled) - return -EBUSY; - + if (alm.enabled) { + if (push) { + rtc_tm_to_time(&alm.time, &push); + alarm += push; + } else + return -EBUSY; + } else if (push) + return -EINVAL; alm.enabled = 1; } else { alm.enabled = 0; @@ -251,5 +261,5 @@ void rtc_sysfs_del_device(struct rtc_device *rtc) void __init rtc_sysfs_init(struct class *rtc_class) { - rtc_class->dev_attrs = rtc_attrs; + rtc_class->dev_groups = rtc_groups; } |