linux-kernel - Re: [PATCH v2 1/3] clk: qcom: smd-rpm: Add .recalc_rate hook for clk_smd_rpm_branch

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Date:   Wed, 13 Oct 2021 12:43:09 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Shawn Guo <shawn.guo@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shawn Guo <shawn.guo@...aro.org>
Subject: Re: [PATCH v2 1/3] clk: qcom: smd-rpm: Add .recalc_rate hook for clk_smd_rpm_branch_ops

Quoting Shawn Guo (2021-09-16 20:04:32)
> As there is a `rate` field in clk_smd_rpm, clk_smd_rpm_recalc_rate() can
> be used by branch clocks to report rate as well, rather than assuming
> the rate is always same as parent clock.  This assumption doesn't hold
> on platforms like QCM2290, where xo_board is 38.4MHz while bi_tcxo is
> 19.2MHz.
> 
> To get this work, XO buffered clocks need the following updates.
> 
> - Assign a correct rate rather than the fake one which is being used to
>   generate binary value for clk_smd_rpm_req interface.
> 
> - Explicitly handle the clk_smd_rpm_req interface value for XO buffered
>   clocks (.rpm_res_type being QCOM_SMD_RPM_CLK_BUF_A).
> 
> Suggested-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
> ---

Applied to clk-next