linux-kernel - Re: [PATCH v3 10/12] i2c: qcom-geni: Use resources helper APIs in runtime PM functions

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Message-ID: <ce78b376-b581-4053-aa23-4f41ea0d140a@oss.qualcomm.com>
Date: Fri, 30 Jan 2026 13:05:21 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Praveen Talari <praveen.talari@....qualcomm.com>,
        Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Mukesh Kumar Savaliya <mukesh.savaliya@....qualcomm.com>,
        Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, bryan.odonoghue@...aro.org,
        dmitry.baryshkov@....qualcomm.com, bjorn.andersson@....qualcomm.com
Cc: prasad.sodagudi@....qualcomm.com, quic_vtanuku@...cinc.com,
        aniket.randive@....qualcomm.com, chandana.chiluveru@....qualcomm.com
Subject: Re: [PATCH v3 10/12] i2c: qcom-geni: Use resources helper APIs in
 runtime PM functions

On 1/12/26 11:47 AM, Praveen Talari wrote:
> To manage GENI serial engine resources during runtime power management,
> drivers currently need to call functions for ICC, clock, and
> SE resource operations in both suspend and resume paths, resulting in
> code duplication across drivers.
> 
> The new geni_se_resources_activate() and geni_se_resources_deactivate()
> helper APIs addresses this issue by providing a streamlined method to
> enable or disable all resources based, thereby eliminating redundancy
> across drivers.
> 
> Signed-off-by: Praveen Talari <praveen.talari@....qualcomm.com>
> ---
> v1->v2:
> Bjorn:
> - Remove geni_se_resources_state() API.
> - Used geni_se_resources_activate() and geni_se_resources_deactivate()
>   to enable/disable resources.
> ---
>  drivers/i2c/busses/i2c-qcom-geni.c | 28 +++++-----------------------
>  1 file changed, 5 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index a4b13022e508..b0a18e3d57d9 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -1160,18 +1160,15 @@ static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
>  	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
>  
>  	disable_irq(gi2c->irq);
> -	ret = geni_se_resources_off(&gi2c->se);
> +
> +	ret = geni_se_resources_deactivate(&gi2c->se);

This calls dev_pm_opp_set_rate(se->dev, 0), dropping the performance state
vote, but the other function doesn't have a counterpart to bring it back

Konrad