Enable support for a USB-C PPC.
The Kconfig option CONFIG_PLATFORM_EC_USBC_PPC enables the selection of a PPC. See the file Kconfig.ppc for all Kconfig options related to this feature.
The PPC device tree nodes are defined in the DTS Bindings file for each type of PPC that extends ppc-chip.yaml. The PPC device is added to the corresponding I2C bus node and the “named-usbc-port” contains a phandle to the PPC device.
None required.
PPC support does not enable any threads.
The I2C bus scan can be used to verify the PPC device can be accessed and the ppc_dump console command can be used to dump the PPC register.
Usage: ppc_dump <USB-C port>
The Hoglin system uses the Silergy SYV682X PPC on USBC port 0.
CONFIG_PLATFORM_EC_USBC_PPC=y CONFIG_PLATFORM_EC_USBC_PPC_SYV682X=y
port0@0 {
compatible = "named-usbc-port";
reg = <0>;
ppc = <&ppc_port1>;
};
&i2c2_0 {
ppc_port1: syv682x@41 {
compatible = "silergy,syv682x";
status = "okay";
reg = <0x41>;
frs_en_gpio = <&gpio_usb_c1_frs_en>;
};
};