topic Re: ptn5110 device tree configuration? in i.MX Processors

ptn5110 device tree configuration?

amodamatya — Fri, 16 Apr 2021 14:57:58 GMT

We have been using imx8qxp processors which has support for USB Power delivery.
In imx8x-mek.dtsi , I can see that there is a node for ptn5110 device. We would want the device to be able to provide 5V, 12V and 15V with 3A current.

I have changed the source pdos to the values that I have mentioned above in this way, is this a correct implementation? How does the voltage switching in kernel happen? Do I have to write down some properties for the vbus-supply to switch the voltage?

ptn5110@50 {

compatible = "nxp,ptn5110";

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_typec>;

reg = <0x50>;

interrupt-parent = <&lsio_gpio1>;

interrupts = <3 IRQ_TYPE_LEVEL_LOW>;

status = "okay";

usb_con: connector {

compatible = "usb-c-connector";

label = "USB-C";

data-role = "dual";

power-role = "source";

source-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)

PDO_FIXED(12000, 3000, PDO_FIXED_USB_COMM)

PDO_FIXED(15000, 3000, PDO_FIXED_USB_COMM)>;

ports {

#address-cells = <1>;

#size-cells = <0>;

port@1 {

reg = <1>;

usb_con_ss: endpoint {

remote-endpoint = <&usb3_data_ss>;

};

Re: ptn5110 device tree configuration?

IvanRuiz — Mon, 19 Apr 2021 16:59:09 GMT

Hello,

I believe this configuration involves SW and HW but need to check internally. In the meantime, could you please share your schematics in order to check the HW part?

Thank you.

BR,

Ivan.

Re: ptn5110 device tree configuration?

amodamatya — Wed, 28 Apr 2021 10:19:10 GMT

Hello, thank you for your response and also sorry for the late reply as I am only working as a part time.
We found out, where in the kernel we have to supply the regulator voltage, here
https://elixir.bootlin.com/linux/latest/source/drivers/usb/typec/tcpm/tcpm.c#L3861,
so we got some idea to move ahead, we will seek your help, if there is any confusions ahead..