NCT5525D Super I/O

The Super I/O has the ID 0xd293 and the source can be found in src/superio/nuvoton/nct5525d/.

Logical devices

These logical devices are switched with device pnp <port>.<ldn> on|off below the chip superio/nuvoton/nct5525d entry:

Path	Function	on / off controls
2	UART A	CR30[0]
5	Keyboard controller	CR30[0]
b	Hardware monitor, SMBus master, LED	CR30[0]
16	Deep S5	LDN 16 CR30[0]

Logical devices that aren’t in the devicetree are left untouched. Several settings of this chip, like Deep S5 (2e.16), are battery-backed.

For developers

The Super I/O generates ACPI using the SSDT generator for generic SuperIOs for the hardware monitor.