linux-kernel - Re: [PATCH v3 1/2] Driver core: add bus_find_device_by

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Message-ID: <20181009151533.GC20774@sirena.org.uk>
Date:   Tue, 9 Oct 2018 16:15:33 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Silesh C V <svellattu@...sta.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-i2c@...r.kernel.org, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-spi@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Lijun Ou <oulijun@...wei.com>,
        "Wei Hu(Xavier)" <xavier.huwei@...wei.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH v3 1/2] Driver core: add bus_find_device_by_fwnode

On Tue, Oct 09, 2018 at 01:02:10PM +0200, Wolfram Sang wrote:

> We recently had this discussion in I2C world about using the parent if
> the (logical) device has a NULL fw_node [1]. I don't know if the other
> subsystems you modify use logical devices as well? If no, it seems we
> need an additional check for the parent in the I2C core only. If yes,
> this might be considered in your patchset?

SPI has a logical controller device as well.

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