linux-kernel - Re: [PATCH v5 4/6] PCI: brcmstb: Add control of subdevice voltage regulators

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

Message-ID: <YXLLRLwMG7nEwQoi@sirena.org.uk>
Date:   Fri, 22 Oct 2021 15:31:32 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Jim Quinlan <jim2101024@...il.com>
Cc:     linux-pci@...r.kernel.org,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Rob Herring <robh@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com, james.quinlan@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 4/6] PCI: brcmstb: Add control of subdevice voltage
 regulators

On Fri, Oct 22, 2021 at 10:06:57AM -0400, Jim Quinlan wrote:

> +static const char * const supplies[] = {
> +	"vpcie3v3-supply",
> +	"vpcie3v3aux-supply",
> +	"brcm-ep-a-supply",
> +	"brcm-ep-b-supply",
> +};

Why are you including "-supply" in the names here?  That will lead to
a double -supply when we look in the DT which probably isn't what you're
looking for.

Also are you *sure* that the device has supplies with names like
"brcm-ep-a"?  That seems rather unidiomatic for electrical engineering,
the names here are supposed to correspond to the names used in the
datasheet for the part.

> +	/* This is for Broadcom STB/CM chips only */
> +	if (pcie->type == BCM2711)
> +		return 0;

It is a relief that other chips have managed to work out how to avoid
requiring power.

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)