[PATCH v5 4/4] i3c: master: Add basic driver for the Renesas I3C controller

[Wolfram Sang]

> Why not use readl() and writel() directly?
> To make it easier to add debug prints during initial development?

Yes. And ultimately, there is a patch in the works converting the driver
to MMIO regmap to get rid of _all_ the helpers. I couldn't make this in
time for the 6.17 mergewindow, though, because of... gory details.