Messages in this thread | | | Date | Fri, 26 Apr 2013 17:08:31 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH] clk: add option to keep boot clocks on |
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On 04/26/13 16:39, Olof Johansson wrote: > This is primarily useful when there's a driver that doesn't claim clocks > properly, but the bootloader does. It's not expected to be used in normal > cases, but for bringup and debug it's very useful to have the option to > not gate unclaimed clocks that are still on. > > Signed-off-by: Olof Johansson <olof@lixom.net>
add to Documentation/kernel-parameters.txt or somewhere else?
> --- > > Mike, this is a pretty trivial patch that I would love to see in 3.10 > even though it's getting late. I'm definitely not picky about the naming > of the boot option, so feel free to change it. > > > -Olof > > drivers/clk/clk.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c > index 20ce67f..b22551e 100644 > --- a/drivers/clk/clk.c > +++ b/drivers/clk/clk.c > @@ -499,10 +499,24 @@ out: > return; > } > > + > +static bool keep_boot_clocks; > +static int __init clk_keep_boot_clocks(char *__unused) > +{ > + keep_boot_clocks = true; > + return 1; > +} > +__setup("clk_keep_boot_clocks", clk_keep_boot_clocks); > + > static int clk_disable_unused(void) > { > struct clk *clk; > > + if (keep_boot_clocks) { > + pr_warn("clk: Not disabling unused clocks\n"); > + return 0; > + } > + > clk_prepare_lock(); > > hlist_for_each_entry(clk, &clk_root_list, child_node) >
-- ~Randy
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