linux-kernel - Re: [PATCH v8 1/3] phy: qcom-edp: add regulator_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Fri, 20 May 2022 09:53:10 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...ux.ie,
        agross@...nel.org, dmitry.baryshkov@...aro.org,
        quic_abhinavk@...cinc.com, quic_aravindh@...cinc.com,
        quic_sbillaka@...cinc.com, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 1/3] phy: qcom-edp: add regulator_set_load to edp phy

On Fri 20 May 09:26 PDT 2022, Kuogee Hsieh wrote:

> This patch add regulator_set_load() before enable regulator at
> eDP phy driver.
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-edp.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
> index cacd32f..afd9e17 100644
> --- a/drivers/phy/qualcomm/phy-qcom-edp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-edp.c
> @@ -87,12 +87,17 @@ struct qcom_edp {
>  
>  	struct clk_bulk_data clks[2];
>  	struct regulator_bulk_data supplies[2];
> +	int enable_load[2];
>  };
>  
>  static int qcom_edp_phy_init(struct phy *phy)
>  {
>  	struct qcom_edp *edp = phy_get_drvdata(phy);
>  	int ret;
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(edp->supplies); i++)
> +		regulator_set_load(edp->supplies[i].consumer, edp->enable_load[i]);

The regulator framework only accounts for the load of enabled regulator
consumers, so you should be able to just call regulator_set_load() right
after devm_regulator_bulk_get() and not carry the enable_load array of
static constants.

Regards,
Bjorn

>  
>  	ret = regulator_bulk_enable(ARRAY_SIZE(edp->supplies), edp->supplies);
>  	if (ret)
> @@ -635,6 +640,8 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
>  
>  	edp->supplies[0].supply = "vdda-phy";
>  	edp->supplies[1].supply = "vdda-pll";
> +	edp->enable_load[0] = 21800;	/* load for 1.2 V vdda-phy supply */
> +	edp->enable_load[1] = 36000;	/* load for 0.9 V vdda-pll supply */
>  	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(edp->supplies), edp->supplies);
>  	if (ret)
>  		return ret;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>