Re: [PATCH 3/4] rtc: rtc-hid-sensor-time: add option hctosys to settime at boot

From: Andrew Morton
Date: Tue May 21 2013 - 17:42:31 EST

On Sun, 5 May 2013 13:21:26 +0200 Alexander Holler <holler@xxxxxxxxxxxxx> wrote:

> drivers/rtc/hctosys (CONFIG_RTC_HCTOSYS) doesn't work for
> rtc-hid-sensor-time because it will be called in late_init, and thus before
> rtc-hid-sensor-time gets loaded. To set the time through
> rtc-hid-sensor-time at startup, the module now checks by default if the
> system time is before 1970-01-02 and sets the system time (once) if this is
> the case.
> To disable this behaviour, set the module option hctosys to zero, e.g. by
> using rtc-hid-sensor-time.hctosys=0 at the kernel command line if the
> driver is statically linked into the kernel.

I still find this rather unpleasant. Partly because it's hacky, mainly
because it only solves the problem for one driver.

Can we please try harder to find a more general fix?

For example: if hctosys finds there are no drivers available, it sets a
flag. Later when drivers are registered(?), that flag is queried and,
if set, we set the system time at this time.

Or something.
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