Hi Everyone,
I have some questions about how should I do that can correctly enable USB OTG on i.MX7ULP_EVB.
(BSP version : imx-4.9.51-8mq_ga.).
My purpose is :
Setting i.mx7ulp_evb as a "USB device" , and connect the Type-C USB port(It's is locate on i.mx7ulp_evb ) into my PC , let my PC can recognize i.mx7ulp_EVB as a USB device (eg. A mass storage)
But now my PC can't recognize the i.mx7ulp_evb as a USB device.
And I already according to "i.MX Reference Manual ,Document Number: IMXLXRM ,Rev. L4.9.51_imx8mq-beta, 01/2018" to setting parameters (These parameters almost default :y in BSP) :
============================================================
1. CONFIG_USB-Build Support for Host-side USB
2. CONFIG_USB_EHCI_HCD EHCI HCD (USB 2.0) support
Default y
3. CONFIG_USB_CHIPIDEA- ChipIdea high-speed Dual Role Controller
Default y
4. CONFIG_USB_CHIPIDEA_UDC - ChipIdea device controller
Default y
5. CONFIG_USB_CHIPIDEA_HOST - ChipIdea host controller
Default y
6. CONFIG_USB_GADGET - USB Gadget Support
Default y
7. CONFIG_USB_MXS_PHY - Freescale MXS USB PHY support
Default y
=============================================================
My question show as below:
1. The parameter : "OTG support " in menuconfig:
---Device drivers
---USB support
[ ] OTG support <------- Does this parameter should set to "y" ?
2.In the original "i.mx7ulp_evk.dts" in "imx-4.9.51-8mq_ga BSP" , the CC Logic Control : PTN5150A(it's for type-c driver ) is not setting .
Should I need to add device node PTN5150A manually or not?
3.Why I can't find the
"/sys/bus/usb/devices/usb1"
and
"/sys/bus/usb/devices/1-1" in i.mx7ulp linux kernel environment.
4.In original "&usbotg1" node in "i.mx7ulp_evk.dts" as below :
------------------------------------------------------
&usbotg1 {
vbus-supply = <®_usb_otg1_vbus>;
extcon = <0>, <&extcon_usb1>;
srp-disable;
hnp-disable;
adp-disable;
status = "okay";
};
----------------------------------------------------
It's neither set
dr_mode = "host"
nor
dr_mode ="peripheral"
nor
dr_mode = "otg"
Should I need to add "dr_mode = "otg" into or not?
5.In the menuconfig ,whether any parameters of my setting is incorrect?
6.What steps should I do that can enable USB otg correctly?
Thanks.
