linux-kernel - Re: [PATCH v7 0/5] clk: ti: add am33xx spread spectrum clock support

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Message-ID: <YLnVF6owlhZu6JU6@atomide.com>
Date:   Fri, 4 Jun 2021 10:24:07 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Dario Binacchi <dariobin@...ero.it>
Cc:     linux-kernel@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Benoît Cousson <bcousson@...libre.com>,
        Tero Kristo <kristo@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH v7 0/5] clk: ti: add am33xx spread spectrum clock support

Hi,

* Dario Binacchi <dariobin@...ero.it> [210602 15:00]:
> 
> As reported by the TI spruh73x/spruhl7x RM, MPU and LCD modules support
> spread spectrum clocking (SSC) on their output clocks. SSC is used to
> spread the spectral peaking of the clock to reduce any electromagnetic
> interference (EMI) that may be caused due to the clock’s fundamental
> or any of its harmonics.
> The series allows you to enable and adjust the spread spectrum clocking
> for all am33xx/am43xx PLLs for which it is supported. All these issues
> have been fixed.
> 
> 
> Previous versions of the series did not supported SSC for am43xx SOCs,
> causing clock registration failure for DPLLs. Furthermore, for am33xx
> SOCs, clock registration failed for DPLLs for which SSC is not supported.

Looks good to me, probably best to queue this all via the clock tree.

Regards,

Tony