This implements basic driver to utilize the I3C IP block
on NPCX.
1. I3C mode: Main controller mode only.
2. Transfer: Support SDR only.
3. IBI: Support Hot-Join, IBI(MDB).
Controller request is not supported.
4. Support 3 I3C modules:
I3C1(3.3V), I3C2(1.8V, espi mode), (I3C3 1.8V or 3.3V)
Signed-off-by: Alvis Sun <yfsun@nuvoton.com>
The default is that the high time for open-drain clk is one
PPBAUD, which is typically very short. Some device require
a longer high time during the open-drain address phase so
add a property to allow device tree to override the default.
Signed-off-by: Mike J. Chen <mjchen@google.com>
DTS property attributes are (by default) not required.
Explicitly specifying `required: false` is redundant.
Perhaps a warning to that effect would be useful.
Signed-off-by: Chris Friedt <cfriedt@meta.com>
This adds a base binding for I3C controllers.
Note that this follows the Linux kernel 5.17 bindings under
Documentation/devicetree/bindings/i3c/i3c.yaml.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
