linux-kernel - Re: [PATCH v4 3/6] PCI: brcmstb: Add control of slot0 device voltage regulators

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Message-ID: <20210406163439.GL6443@sirena.org.uk>
Date:   Tue, 6 Apr 2021 17:34:39 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Jim Quinlan <jim2101024@...il.com>
Cc:     linux-pci@...r.kernel.org,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Rob Herring <robh@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com, james.quinlan@...adcom.com,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Florian Fainelli <f.fainelli@...il.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 v4 3/6] PCI: brcmstb: Add control of slot0 device voltage
 regulators

On Thu, Apr 01, 2021 at 05:21:43PM -0400, Jim Quinlan wrote:

> +	/* Look for specific pcie regulators in the RC DT node. */
> +	for_each_property_of_node(np, pp) {
> +		for (i = 0; i < ns; i++)
> +			if (strcmp(supplies[i], pp->name) == 0)

This is broken, the driver knows which supplies are expected, the device
can't function without these supplies so the driver should just
unconditionally request them like any other supply.

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