linux-kernel - Re: [PATCH 2/2] ARM: dts: nexus7: Add regulator tweaks and wcnss entry to support wifi

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Date:   Sat, 13 May 2017 12:19:41 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Nicolas Dechesne <nicolas.dechesne@...aro.org>,
        Stephen Boyd <stephen.boyd@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Vinay Simha <simhavcs@...il.com>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH 2/2] ARM: dts: nexus7: Add regulator tweaks and wcnss
 entry to support wifi

On Fri 12 May 14:18 PDT 2017, John Stultz wrote:

>  				lvs7 {
>  					bias-pull-down;
> +					regulator-always-on;
>  				};

Looking at the downstream regulator definition lvs7 is identified as
"pll_vdd" - which I believe is what Qualcomm abbreviates as "px". It's
supplied by S4 and as such will provide 1.8V to something. So it's quite
likely that I picked the wrong regulator in the dtsi and that this is
the px supply of the wcnss.

Unfortunately I don't have any 8064 device (with wcnss) hooked up and I
can't find any schematics :/

Would you mind changing the riva-pil vddpx-supply to &pm8921_lvs7 and
give this a spin?

Regards,
Bjorn