Bootlin engineer Miquèl Raynal submitted to the Linux I3C community a new driver for an I3C Master Controller: the Silvaco I3C Master Controller IP. See the main patch from Miquèl at http://lists.infradead.org/pipermail/linux-i3c/2020-July/000004.html, which adds the driver itself.
Note that Bootlin pioneered the support of I3C in Linux, as we contributed the core I3C subsystem a few years ago. See our blog posts at https://bootlin.com/blog/i3c-subsystem-linux-kernel/ and https://bootlin.com/blog/i3c-upstream-linux/
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