i3c: master: Add basic driver for the Renesas I3C controller

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Add a basic driver for the I3C controller found in Renesas RZ/G3S and
G3E SoCs. Support I3C pure busses (tested with two targets) and mixed
busses (two I3C devices plus various I2C targets). DAA and communication
with temperature sensors worked reliably at various speeds.

Missing features such as IBI, HotJoin, and target mode will be added
incrementally.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250724094146.6443-5-wsa+renesas@sang-engineering.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Wolfram Sang 2025-07-24 11:41:43 +02:00 • committed by Alexandre Belloni

parent 94e611b5b9

commit d028219a9f

4 changed files with 1422 additions and 0 deletions

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MAINTAINERS

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drivers/i3c/master/Kconfig

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drivers/i3c/master/Makefile

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drivers/i3c/master/renesas-i3c.c

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