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[73.183.52.120]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4b2b8de632csm94044401cf.36.2025.08.27.08.45.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Aug 2025 08:45:21 -0700 (PDT) Date: Wed, 27 Aug 2025 11:45:19 -0400 From: Brian Masney To: Peng Fan Cc: Michael Turquette , Stephen Boyd , Sudeep Holla , Cristian Marussi , Marco Felsch , Geert Uytterhoeven , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 1/3] clk: Introduce clk_hw_set_spread_spectrum Message-ID: References: <20250812-clk-ssc-version1-v1-0-cef60f20d770@nxp.com> <20250812-clk-ssc-version1-v1-1-cef60f20d770@nxp.com> Precedence: bulk X-Mailing-List: arm-scmi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20250812-clk-ssc-version1-v1-1-cef60f20d770@nxp.com> User-Agent: Mutt/2.2.14 (2025-02-20) X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: _lhi-XKWIm5sBCD1yOVm_NxOFnGqHXJTRzWXND4DNdA_1756309522 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > --- > 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