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 <[email protected]>
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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