linux-kernel - Re: [PATCH 1/3] clk: Introduce clk_hw_set_spread

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Message-ID: <aK8oD6HNw131avjI@x1>
Date: Wed, 27 Aug 2025 11:45:19 -0400
From: Brian Masney <bmasney@...hat.com>
To: Peng Fan <peng.fan@....com>
Cc: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Marco Felsch <m.felsch@...gutronix.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
	arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] clk: Introduce clk_hw_set_spread_spectrum

On Tue, Aug 12, 2025 at 08:17:05PM +0800, Peng Fan wrote:
> Add clk_hw_set_spread_spectrum to configure a clock to enable spread
> spectrum feature. set_spread_spectrum ops is added for clk drivers to
> have their own hardware specific implementation.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/clk/clk.c            | 32 ++++++++++++++++++++++++++++++++
>  include/linux/clk-provider.h | 29 +++++++++++++++++++++++++++++
>  2 files changed, 61 insertions(+)
> 
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index b821b2cdb155331c85fafbd2fac8ab3703a08e4d..48c7a301b72b30fd824dae7ada2c44ee84d40867 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -2802,6 +2802,38 @@ int clk_set_max_rate(struct clk *clk, unsigned long rate)
>  }
>  EXPORT_SYMBOL_GPL(clk_set_max_rate);
>  
> +int clk_hw_set_spread_spectrum(struct clk_hw *hw, unsigned int modfreq_hz,
> +			       unsigned int spread_bp, unsigned int method)
                                                       ^^^^^^^^^^^^
Should this be 'enum clk_ssc_method'?

Also can you add kernel docs for all of the parameters? I know it's
documented on 'struct clk_spread_spectrum' below.

What do you think about having this function take that struct instead as
a parameter to match what's on the clk op?

Brian