ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

This commit introduces Power over Data Line (PoDL) Power Source
Equipment (PSE) regulator nodes to the PRTT1C devicetree. The addition
of these

ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

This commit introduces Power over Data Line (PoDL) Power Source
Equipment (PSE) regulator nodes to the PRTT1C devicetree. The addition
of these nodes enables support for PoDL in PRTT1C devices, allowing
power delivery and data transmission over a single twisted pair.

The new PoDL PSE regulator nodes provide voltage capability information
of the current board design, which can be used as a hint for system
administrators when configuring and managing power settings. This
update enhances the versatility and simplifies the power management of
PRTT1C devices while ensuring compatibility with connected Powered
Devices (PDs).

After applying this patch, the power delivery can be controlled from
user space with a patched [1] ethtool version using the following commands:
ethtool --set-pse t1l2 podl-pse-admin-control enable
to enable power delivery, and
ethtool --show-pse t1l2
to display the PoDL PSE settings.

By integrating PoDL PSE support into the PRTT1C devicetree, users can
benefit from streamlined power and data connections in their
deployments, improving overall system efficiency and reducing cabling
complexity.

[1] https://lore.kernel.org/all/20230317093024.1051999-1-o.rempel@pengutronix.de/

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

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ARM: dts: Move .dts files to vendor sub-directories

The arm dts directory has grown to 1559 boards which makes it a bit
unwieldy to maintain and use. Past attempts stalled out due to plans to
move .

ARM: dts: Move .dts files to vendor sub-directories

The arm dts directory has grown to 1559 boards which makes it a bit
unwieldy to maintain and use. Past attempts stalled out due to plans to
move .dts files out of the kernel tree. Doing that is no longer planned
(any time soon at least), so let's go ahead and group .dts files by
vendors. This move aligns arm with arm64 .dts file structure.

There's no change to dtbs_install as the flat structure is maintained on
install.

The naming of vendor directories is roughly in this order of preference:
- Matching original and current SoC vendor prefix/name (e.g. ti, qcom)
- Current vendor prefix/name if still actively sold (SoCs which have
been aquired) (e.g. nxp/imx)
- Existing platform name for older platforms not sold/maintained by any
company (e.g. gemini, nspire)

The whole move was scripted with the exception of MAINTAINERS and a few
makefile fixups.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michal Simek <michal.simek@amd.com> #Xilinx
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Paul Barker <paul.barker@sancloud.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Wei Xu <xuwei5@hisilicon.com> #hisilicon
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Nick Hawkins <nick.hawkins@hpe.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com> #broadcom
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Romain Perier <romain.perier@gmail.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

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