linux-kernel - Re: [PATCH V1 4/4] phy: qcom-qmp-ufs: read max-microamp values from device tree

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Message-ID: <5nsglhsnqdx4l44r36zmxumcpbbwhns4432hm3lvttsgyjaknb@feobdhpzzo65>
Date: Sat, 9 Aug 2025 10:30:09 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Nitin Rawat <quic_nitirawa@...cinc.com>
Cc: vkoul@...nel.org, kishon@...nel.org, mani@...nel.org, conor+dt@...nel.org,
        bvanassche@....org, andersson@...nel.org, neil.armstrong@...aro.org,
        konradybcio@...nel.org, krzk+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH V1 4/4] phy: qcom-qmp-ufs: read max-microamp values from
 device tree

On Wed, Aug 06, 2025 at 09:13:40PM +0530, Nitin Rawat wrote:
> Add support in QMP PHY driver to read optional vdda-phy-max-microamp
> and vdda-pll-max-microamp properties from the device tree.
> 
> These properties define the expected maximum current (in microamps) for
> each supply. The driver uses this information to configure regulators
> more accurately and ensure they operate in the correct mode based on
> client load requirements.

What defines those load values? Are they actually dependent on the
platform? On the SoC? On the board design? On the UFS gear?

> 
> If the property is not present, the driver defaults load to
> `QMP_VREG_UNUSED`.
> 
> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 22 +++++++++++++++++++---
>  1 file changed, 19 insertions(+), 3 deletions(-)
> 

-- 
With best wishes
Dmitry