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Date: Thu, 31 Jan 2008 18:16:48 -0500 From: Mike Frysinger <vapier.adi@...il.com> To: a.zummo@...ertech.it, Andrew Morton <akpm@...l.org> Cc: rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org Subject: [patch] update rtc documentation wrt irq_set_freq I could have sworn I sent this out already, but I don't see it in the latest git or in mm, so here we go ... --- This documents the proper use of the irq_set_freq function. Signed-off-by: Mike Frysinger <vapier@...too.org> --- diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt index e20b19c..8deffcd 100644 --- a/Documentation/rtc.txt +++ b/Documentation/rtc.txt @@ -182,8 +182,8 @@ driver returns ENOIOCTLCMD. Some common examples: since the frequency is stored in the irq_freq member of the rtc_device structure. Your driver needs to initialize the irq_freq member during init. Make sure you check the requested frequency is in range of your - hardware in the irq_set_freq function. If you cannot actually change - the frequency, just return -ENOTTY. + hardware in the irq_set_freq function. If it isn't, return -EINVAL. If + you cannot actually change the frequency, do not define irq_set_freq. If all else fails, check out the rtc-test.c driver! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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