dt-bindings: can: renesas,rcar-canfd: Add transceiver support

Add support for describing CAN transceivers as PHYs.

While simple CAN transceivers can do without, this is needed for CAN
transceivers like NXP TJR1443 that need a configuration step (like
pulling standby or enable lines), and/or impose a bitrate limit.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/1bd328b5c9c6cfa633b42af87550f4c7358a05c1.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: Document R-Car V4H support

Document support for the CAN-FD Interface on the Renesas R-Car V4H
(R8A779G0) SoC.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/d8158c78cc786c432df5a5e5bbad848b717aca71.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: R-Car V3U is R-Car Gen4

Despite the name, R-Car V3U is the first member of the R-Car Gen4
family. Hence generalize this by introducing a family-specific
compatible value for R-Car Gen4.

While at it, replace "both channels" by "all channels", as the numbers
of channels may differ from two.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/4dea4b7dd76d4f859ada85f97094b7adeef5169f.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: Fix number of channels for R-Car V3U

According to the bindings, only two channels are supported.
However, R-Car V3U supports eight, leading to "make dtbs" failures:

arch/arm64/boot/dts/renesas/r8a779a0-falcon.dtb: can@e6660000: Unevaluated properties are not allowed ('channel2', 'channel3', 'channel4', 'channel5', 'channel6', 'channel7' were unexpected)

Update the number of channels to 8 on R-Car V3U.
While at it, prevent adding more properties to the channel nodes, as
they must contain no other properties than a status property.

Fixes: d6254d52d70de530 ("dt-bindings: can: renesas,rcar-canfd: Document r8a779a0 support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/all/7d41d72cd7db2e90bae069ce57dbb672f17500ae.1670431681.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: Document RZ/Five SoC

The CANFD block on the RZ/Five SoC is identical to one found on the
RZ/G2UL SoC. "renesas,r9a07g043-canfd" compatible string will be used
on the RZ/Five SoC so to make this clear, update the comment to include
RZ/Five SoC.

No driver changes are required as generic compatible string
"renesas,rzg2l-canfd" will be used as a fallback on RZ/Five SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/20221115123811.1182922-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: Make interrupt-names required

The Renesas R-Car CAN FD Controller always uses two or more interrupts.
Make the interrupt-names properties a required property, to make it
easier to identify the individual interrupts.

Update the example accordingly.

Link: https://lore.kernel.org/all/a68e65955e0df4db60233d468f348203c2e7b940.1651512451.git.geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: Document RZ/G2UL support

Add CANFD binding documentation for Renesas R9A07G043 (RZ/G2UL) SoC.

Link: https://lore.kernel.org/all/20220423130743.123198-1-biju.das.jz@bp.renesas.com
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: renesas,rcar-canfd: document r8a77961 support

This patch adds documentation for the r8a77961 to the
renesas,rcar-canfd binding.

Link: https://lore.kernel.org/all/20220401153743.77871-1-wsa+renesas@sang-engineering.com
Cc: devicetree@vger.kernel.org
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: net: can: renesas,rcar-canfd: Document RZ/V2L SoC

Document RZ/V2L CANFD bindings. RZ/V2L CANFD is identical to one found on
the RZ/G2L SoC. No driver changes are required as generic compatible
string "renesas,rzg2l-canfd" will be used as a fallback.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220227213250.23637-1-prabhakar.mahadev-lad.rj@bp.renesas.com

dt-bindings: can: renesas,rcar-canfd: Document r8a779a0 support

Document support for rcar_canfd on R8A779A0 (V3U) SoCs.

Link: https://lore.kernel.org/all/20220309162609.3726306-5-uli+renesas@fpond.eu
Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: net: can: renesas,rcar-canfd: Document RZ/G2L SoC

Add CANFD binding documentation for Renesas RZ/G2L SoC.

Link: https://lore.kernel.org/r/20210727133022.634-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

dt-bindings: can: rcar_canfd: Convert to json-schema

Convert the Renesas R-Car CAN FD Controller Device Tree binding
documentation to json-schema.

Document missing properties.
The CANFD clock needs to be configured for the maximum frequency on
R-Car V3M and V3H, too.
Update the example to match reality.

Link: https://lore.kernel.org/r/905134c87f72e2d8e37c309e0ce28ecd7d4f3992.1620323639.git.geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>