linux-kernel - Re: [PATCH] phy: qcom: qmp-combo: Fix register base for QSERDES_DP_PHY

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Message-ID: <CAA8EJppHXkTNSNaCoYWZaRmKw=AfWL4N0WCqR6uFgNdbkw4VUw@mail.gmail.com>
Date: Fri, 5 Apr 2024 05:56:19 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Stephen Boyd <swboyd@...omium.org>
Cc: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, linux-kernel@...r.kernel.org, 
	patches@...ts.linux.dev, linux-arm-msm@...r.kernel.org, 
	Konrad Dybcio <konrad.dybcio@...aro.org>, linux-phy@...ts.infradead.org, 
	freedreno@...ts.freedesktop.org, Douglas Anderson <dianders@...omium.org>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Abel Vesa <abel.vesa@...aro.org>, Steev Klimaszewski <steev@...i.org>, 
	Johan Hovold <johan+linaro@...nel.org>, Bjorn Andersson <quic_bjorande@...cinc.com>
Subject: Re: [PATCH] phy: qcom: qmp-combo: Fix register base for QSERDES_DP_PHY_MODE

On Fri, 5 Apr 2024 at 03:01, Stephen Boyd <swboyd@...omium.org> wrote:
>
> The register base that was used to write to the QSERDES_DP_PHY_MODE
> register was 'dp_dp_phy' before commit 815891eee668 ("phy:
> qcom-qmp-combo: Introduce orientation variable"). There isn't any
> explanation in the commit why this is changed, so I suspect it was an
> oversight or happened while being extracted from some other series.
> Oddly the value being 0x4c or 0x5c doesn't seem to matter for me, so I
> suspect this is dead code, but that can be fixed in another patch. It's
> not good to write to the wrong register space, and maybe some other
> version of this phy relies on this.
>
> Cc: Douglas Anderson <dianders@...omium.org>
> Cc: Abhinav Kumar <quic_abhinavk@...cinc.com>
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Cc: Neil Armstrong <neil.armstrong@...aro.org>
> Cc: Abel Vesa <abel.vesa@...aro.org>
> Cc: Steev Klimaszewski <steev@...i.org>
> Cc: Johan Hovold <johan+linaro@...nel.org>
> Cc: Bjorn Andersson <quic_bjorande@...cinc.com>
> Fixes: 815891eee668 ("phy: qcom-qmp-combo: Introduce orientation variable")
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry