From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Herve Codina <herve.codina@bootlin.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Lizhi Hou" <lizhi.hou@amd.com>, "Rob Herring" <robh@kernel.org>,
"Max Zhen" <max.zhen@amd.com>,
"Sonal Santan" <sonal.santan@amd.com>,
"Stefano Stabellini" <stefano.stabellini@xilinx.com>,
"Jonathan Cameron" <Jonathan.Cameron@huawei.com>,
"Krzysztof Wilczyński" <kwilczynski@kernel.org>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
"Allan Nielsen" <allan.nielsen@microchip.com>,
"Horatiu Vultur" <horatiu.vultur@microchip.com>,
"Steen Hegelund" <steen.hegelund@microchip.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v3 2/2] PCI: of: Attach created of_node to existing device
Date: Thu, 11 Apr 2024 15:23:55 +0200 [thread overview]
Message-ID: <2024041142-applause-spearman-bd38@gregkh> (raw)
In-Reply-To: <20240325153919.199337-3-herve.codina@bootlin.com>
On Mon, Mar 25, 2024 at 04:39:15PM +0100, Herve Codina wrote:
> The commit 407d1a51921e ("PCI: Create device tree node for bridge")
> creates of_node for PCI devices.
>
> During the insertion handling of these new DT nodes done by of_platform,
> new devices (struct device) are created. For each PCI devices a struct
> device is already present (created and handled by the PCI core).
> Having a second struct device to represent the exact same PCI device is
> not correct.
>
> On the of_node creation:
> - tell the of_platform that there is no need to create a device for this
> node (OF_POPULATED flag),
> - link this newly created of_node to the already present device,
> - tell fwnode that the device attached to this of_node is ready using
> fwnode_dev_initialized().
>
> With this fix, the of_node are available in the sysfs device tree:
> /sys/devices/platform/soc/d0070000.pcie/
> + of_node -> .../devicetree/base/soc/pcie@d0070000
> + pci0000:00
> + 0000:00:00.0
> + of_node -> .../devicetree/base/soc/pcie@d0070000/pci@0,0
> + 0000:01:00.0
> + of_node -> .../devicetree/base/soc/pcie@d0070000/pci@0,0/dev@0,0
>
> On the of_node removal, revert the operations.
>
> Fixes: 407d1a51921e ("PCI: Create device tree node for bridge")
> Cc: stable@vger.kernel.org
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
I need an ack from the maintainer here before I can take this.
thanks,
greg k-h
next prev parent reply other threads:[~2024-04-11 13:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-25 15:39 [PATCH v3 0/2] Attach DT nodes to existing PCI devices Herve Codina
2024-03-25 15:39 ` [PATCH v3 1/2] driver core: Introduce device_{add,remove}_of_node() Herve Codina
2024-03-25 15:39 ` [PATCH v3 2/2] PCI: of: Attach created of_node to existing device Herve Codina
2024-04-11 13:23 ` Greg Kroah-Hartman [this message]
2024-04-11 20:34 ` Rob Herring
2024-04-12 7:41 ` Greg Kroah-Hartman
2024-04-12 8:10 ` Herve Codina
2024-04-08 12:43 ` [PATCH v3 0/2] Attach DT nodes to existing PCI devices Herve Codina
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