summaryrefslogtreecommitdiff
path: root/Documentation/rtc.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/rtc.txt')
-rw-r--r--Documentation/rtc.txt7
1 files changed, 2 insertions, 5 deletions
diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index 1ef6bb88cd00..7c701b88d6d5 100644
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -147,7 +147,7 @@ RTC class framework, but can't be supported by the older driver.
* RTC_AIE_ON, RTC_AIE_OFF, RTC_ALM_SET, RTC_ALM_READ ... when the RTC
is connected to an IRQ line, it can often issue an alarm IRQ up to
- 24 hours in the future.
+ 24 hours in the future. (Use RTC_WKALM_* by preference.)
* RTC_WKALM_SET, RTC_WKALM_RD ... RTCs that can issue alarms beyond
the next 24 hours use a slightly more powerful API, which supports
@@ -175,10 +175,7 @@ driver returns ENOIOCTLCMD. Some common examples:
called with appropriate values.
* RTC_ALM_SET, RTC_ALM_READ, RTC_WKALM_SET, RTC_WKALM_RD: the
- set_alarm/read_alarm functions will be called. To differentiate
- between the ALM and WKALM, check the larger fields of the rtc_wkalrm
- struct (like tm_year). These will be set to -1 when using ALM and
- will be set to proper values when using WKALM.
+ set_alarm/read_alarm functions will be called.
* RTC_IRQP_SET, RTC_IRQP_READ: the irq_set_freq function will be called
to set the frequency while the framework will handle the read for you