[PATCH 06/13] clk: keep track if a clock is explicitly configured

Maxime Ripard mripard at kernel.org
Tue Sep 19 00:07:03 PDT 2023


Hi,

On Mon, Sep 18, 2023 at 12:40:02AM +0200, Benjamin Bara wrote:
> From: Benjamin Bara <benjamin.bara at skidata.com>
> 
> When we keep track if a clock has a given rate explicitly set by a
> consumer, we can identify unintentional clock rate changes in an easy
> way. This also helps during debugging, as one can see if a rate is set
> by accident or due to a consumer-related change.
> 
> Signed-off-by: Benjamin Bara <benjamin.bara at skidata.com>
> ---
>  drivers/clk/clk.c            | 25 +++++++++++++++++++++++++
>  include/linux/clk-provider.h |  1 +
>  2 files changed, 26 insertions(+)
> 
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 8f4f92547768..82c65ed432c5 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -70,6 +70,7 @@ struct clk_core {
>  	unsigned long		rate;
>  	unsigned long		req_rate;
>  	unsigned long		new_rate;
> +	unsigned long		set_rate;

This is pretty much what req_rate is supposed to be about. Why didn't it
work in your case?

Maxime
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