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doc/kernel-parameters.txt: clarify clk_ignore_unused 

Refine the definition around clk_ignore_unused, which caused some
confusion recently on the linux-fbdev and linux-arm-kernel mailing
lists[0].

[0] http://lkml.kernel.org/r/<20140929135358.GC30998@ulmo>

Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Mike Turquette 2014-09-30 14:24:38 -07:00
parent 38bf3a7978
commit e156ee56cb
1 changed files with 9 additions and 5 deletions
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14
Documentation/kernel-parameters.txt
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@ -605,11 +605,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
See Documentation/s390/CommonIO for details. See Documentation/s390/CommonIO for details.
clk_ignore_unused clk_ignore_unused
[CLK] [CLK]
Keep all clocks already enabled by bootloader on, Prevents the clock framework from automatically gating
even if no driver has claimed them. This is useful clocks that have not been explicitly enabled by a Linux
for debug and development, but should not be device driver but are enabled in hardware at reset or
needed on a platform with proper driver support. by the bootloader/firmware. Note that this does not
For more information, see Documentation/clk.txt. force such clocks to be always-on nor does it reserve
those clocks in any way. This parameter is useful for
debug and development, but should not be needed on a
platform with proper driver support. For more
information, see Documentation/clk.txt.
clock= [BUGS=X86-32, HW] gettimeofday clocksource override. clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
[Deprecated] [Deprecated]