mctp i3c: MCTP I3C driver

Provides MCTP network transport over an I3C bus, as specified in DMTF DSP0233. Each I3C bus (with "mctp-controller" devicetree property) gets an "mctpi3cX" net device created. I3C devices are reachable as remote endpoints through that net device. Link layer addressing uses the I3C PID as a fixed hardware address for neighbour table entries. The driver matches I3C devices that have the MIPI assigned DCR 0xCC for MCTP. Signed-off-by: Matt Johnston <[email protected]> Reviewed-by: Simon Horman <[email protected]> Signed-off-by: Paolo Abeni <[email protected]>
sirdarckcat · Oct 17, 2023 · c8755b2 · c8755b2
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diff --git a/drivers/net/mctp/Kconfig b/drivers/net/mctp/Kconfig
@@ -33,6 +33,15 @@ config MCTP_TRANSPORT_I2C
 	  from DMTF specification DSP0237. A MCTP protocol network device is
 	  created for each I2C bus that has been assigned a mctp-i2c device.
 
+config MCTP_TRANSPORT_I3C
+	tristate "MCTP I3C transport"
+	depends on I3C
+	help
+	  Provides a driver to access MCTP devices over I3C transport,
+	  from DMTF specification DSP0233.
+	  A MCTP protocol network device is created for each I3C bus
+	  having a "mctp-controller" devicetree property.
+
 endmenu
 
 endif
diff --git a/drivers/net/mctp/Makefile b/drivers/net/mctp/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_MCTP_SERIAL) += mctp-serial.o
 obj-$(CONFIG_MCTP_TRANSPORT_I2C) += mctp-i2c.o
+obj-$(CONFIG_MCTP_TRANSPORT_I3C) += mctp-i3c.o