linux-kernel - Re: [PATCH] phy: qcom-qmp-usb: Set regulator load before enabling

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Message-ID: <vda7dcqqfudhoiwbe45irfab62vbn45crfsc7smenskebuteon@rcutjxrfbwrm>
Date: Fri, 5 Sep 2025 16:46:34 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Faisal Hassan <faisal.hassan@....qualcomm.com>
Cc: Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
        Krishna Kurapati <quic_kriskura@...cinc.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        Chenyuan Yang <chenyuan0y@...il.com>,
        Varadarajan Narayanan <quic_varada@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: qcom-qmp-usb: Set regulator load before enabling

On Fri, Sep 05, 2025 at 03:42:43PM +0530, Faisal Hassan wrote:
> Set the regulator load before enabling the regulators to ensure stable
> operation and proper power management on platforms where regulators are
> shared between the QMP USB PHY and other IP blocks.
> 
> Introduce a regulator data structure with explicit enable load values and
> use the regulator framework's `init_load_uA` field along with
> `devm_regulator_bulk_get_const()` to ensure that `regulator_set_load()` is
> applied automatically before the first enable, providing consistent power
> management behavior across platforms.
> 
> Signed-off-by: Faisal Hassan <faisal.hassan@....qualcomm.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 27 ++++++-------------------
>  1 file changed, 6 insertions(+), 21 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry