From: Herve Codina <herve.codina@bootlin.com>
To: Ayush Singh <ayush@beagleboard.org>
Cc: Andrew Davis <afd@ti.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Saravana Kannan <saravanak@google.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Luca Ceresoli <luca.ceresoli@bootlin.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH 0/7] of: overlay: Add support for export-symbols node feature
Date: Wed, 8 Jan 2025 10:47:19 +0100 [thread overview]
Message-ID: <20250108104719.0412ad94@bootlin.com> (raw)
In-Reply-To: <d25572fa-8f0c-4f19-874c-6698a1db40ae@beagleboard.org>
Hi Ayush,
On Wed, 8 Jan 2025 13:58:04 +0530
Ayush Singh <ayush@beagleboard.org> wrote:
...
>
> I will experiment with adding support to dtc and see how things look.
> Hopefully, 2025 is the year of addon board support.
>
Also one point different between fdtoverlay an runtime loading is
that runtime loading allows to set the target node of the overlay
at runtime.
For instance, on LAN966X PCI driver, an overlay is loaded and
applied on a PCI device node.
The overlay loading is done by the PCI driver device:
https://elixir.bootlin.com/linux/v6.13-rc1/source/drivers/misc/lan966x_pci.c#L131
The overlay loaded is the following one:
https://elixir.bootlin.com/linux/v6.13-rc1/source/drivers/misc/lan966x_pci.dtso
For addon boards, this feature is also useful because without any
modification in the overlay itself, it can be applied on the correct
connector. This allows to support, without any overlay modification the
following cases:
- A base board with multiple connectors where an addon board can be
connected.
- An addon board with its own DT overlay used on different base board
This feature is not supported by fdtoverlay. Maybe something like
fdtoverlay --base=/somewhere/my_connector
could be implemented in fdtoverlay in order to choose the node where the
overlay has to be applied.
Best regards,
Hervé
next prev parent reply other threads:[~2025-01-08 9:47 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-09 15:18 [PATCH 0/7] of: overlay: Add support for export-symbols node feature Herve Codina
2024-12-09 15:18 ` [PATCH 1/7] dt-bindings: Add support for export-symbols node Herve Codina
2024-12-09 16:26 ` Rob Herring (Arm)
2024-12-18 13:05 ` Herve Codina
2024-12-09 17:27 ` Luca Ceresoli
2024-12-10 8:20 ` Herve Codina
2024-12-09 15:18 ` [PATCH 2/7] of: resolver: Introduce get_phandle_from_symbols_node() Herve Codina
2024-12-09 15:18 ` [PATCH 3/7] of: resolver: Add export_symbols in of_resolve_phandles() parameters Herve Codina
2024-12-09 15:18 ` [PATCH 4/7] of: resolver: Add support for the export symbols node Herve Codina
2024-12-09 15:18 ` [PATCH 5/7] of: overlay: Add export_symbols_name in of_overlay_fdt_apply() parameters Herve Codina
2024-12-09 17:27 ` Luca Ceresoli
2024-12-10 8:21 ` Herve Codina
2024-12-09 15:18 ` [PATCH 6/7] of: overlay: Add support for the export symbols node Herve Codina
2024-12-09 15:18 ` [PATCH 7/7] of: unittest: Add tests for export symbols Herve Codina
2024-12-10 16:51 ` kernel test robot
2024-12-12 1:05 ` kernel test robot
2024-12-09 16:47 ` [PATCH 0/7] of: overlay: Add support for export-symbols node feature Andrew Davis
2024-12-09 17:03 ` Herve Codina
2024-12-09 17:47 ` Andrew Davis
2024-12-09 19:39 ` Rob Herring
2024-12-10 9:30 ` Ayush Singh
2024-12-09 20:11 ` Rob Herring
2024-12-10 8:16 ` Herve Codina
2024-12-10 13:46 ` Rob Herring
2024-12-10 14:58 ` Herve Codina
2024-12-18 12:22 ` Herve Codina
2024-12-10 9:22 ` Ayush Singh
2024-12-10 9:41 ` Herve Codina
2024-12-10 9:56 ` Ayush Singh
2024-12-10 10:55 ` Herve Codina
2025-01-08 7:36 ` Ayush Singh
2025-01-08 8:07 ` Herve Codina
2025-01-08 8:28 ` Ayush Singh
2025-01-08 9:47 ` Herve Codina [this message]
2025-01-10 4:26 ` David Gibson
2025-01-10 7:36 ` Herve Codina
2025-01-10 7:55 ` Ayush Singh
2025-01-11 3:17 ` David Gibson
2025-04-29 19:12 ` Ayush Singh
-- strict thread matches above, loose matches on Subject: below --
2025-04-30 12:48 Herve Codina
2025-04-30 12:50 ` Herve Codina
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