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-rw-r--r--Documentation/rtc.txt7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index c931d613f641..e20b19c1b60d 100644
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -180,9 +180,10 @@ driver returns ENOIOCTLCMD. Some common examples:
180 * RTC_IRQP_SET, RTC_IRQP_READ: the irq_set_freq function will be called 180 * RTC_IRQP_SET, RTC_IRQP_READ: the irq_set_freq function will be called
181 to set the frequency while the framework will handle the read for you 181 to set the frequency while the framework will handle the read for you
182 since the frequency is stored in the irq_freq member of the rtc_device 182 since the frequency is stored in the irq_freq member of the rtc_device
183 structure. Also make sure you set the max_user_freq member in your 183 structure. Your driver needs to initialize the irq_freq member during
184 initialization routines so the framework can sanity check the user 184 init. Make sure you check the requested frequency is in range of your
185 input for you. 185 hardware in the irq_set_freq function. If you cannot actually change
186 the frequency, just return -ENOTTY.
186 187
187If all else fails, check out the rtc-test.c driver! 188If all else fails, check out the rtc-test.c driver!
188 189