support for MICRO B USB1 in iMX8M Mini

[divyeshmarne0]

Hi Team,

We are working on IMX8MM bringup activities. We need your help.

Our team has changed design from type C port to MICRO B USB1 in IMX8mm.

So could you please share your inputs that what are the changes required in Kernel and UBOOT to support MICRO B USB1 smoothly . 

[joanxie]

refer to the link as below:

"https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX8MM-i-MX8MQ-USB2-0-Design-Without-US..."

[divyeshmarne0]

Can you share the BSP information on which this U-Boot changes are verified ?

Have you prepare the similar changes for kernel to use USB2.0 without USB TYPE-C ?

If yes, please share patch details.

CHANGES:

U-BOOT:  CONFIG_USB_TCPC=n

Device Tree:

&usbotg1 {
    status = "okay";
};

&usbotg2 {
    status = "okay";

We  did the same changes in U-boot. Do we need to make same changes in Kernel as well ?

Like we have defconfig entry for CONFIG_USB_TCPC  in kernel as well. What should be done with kernel changes?

[joanxie]

in uboot, try to remove CONFIG_USB_TCPC in imx8mm_evk_defconfi  and well as removing the typec_ptn5110_1/2 dependencies in the fsl-imx8mm-evk.dts

so in the kernel, you don't need add  CONFIG_USB_TCPC in the configure file, I don't find CONFIG_USB_TCPC in the kernel configure file

[divyeshmarne0]

Hi,

In U-BOOT:

Removed CONFIG_USB_TCPC in imx8mm_evk_defconfi 

Removed typec_ptn5110_1/2 dependencies in the fsl-imx8mm-evk.dts

Kernel:

We have the typec_ptn5110_1 dependency in theimx8mm-evk.dtsi as well. Please check below.

ptn5110: tcpc@50 {
compatible = "nxp,ptn5110";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_typec1>;
reg = <0x50>;
interrupt-parent = <&gpio2>;
interrupts = <11 8>;
status = "okay";

port {
typec1_dr_sw: endpoint {
remote-endpoint = <&usb1_drd_sw>;
};
};

typec1_con: connector {
compatible = "usb-c-connector";
label = "USB-C";
power-role = "dual";
data-role = "dual";
try-power-role = "sink";
source-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>;
sink-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)
PDO_VAR(5000, 20000, 3000)>;
op-sink-microwatt = <15000000>;
self-powered;
};
};

Please share details for these changes as well.

File : "arch/arm64/configs/imx_v8_android_defconfig"

CONFIG_TYPEC=y
CONFIG_TYPEC_TCPM=y
CONFIG_TYPEC_TCPCI=y
CONFIG_TYPEC_FUSB302=m
CONFIG_TYPEC_HD3SS3220=m
CONFIG_TYPEC_SWITCH_GPIO=y

We have these entries in kernel Defconfig. What value should I assign for these entries

[joanxie]

for kernel, pls refer to the link as below and attached file,

This is an example of enabling USB OTG on MX8MM EVK through micro-USB connector, with role-switch done by the ID pin, bypassing the CC logic and type-C connector.

This is done based on L4.14.78 pre-build image and i.MX8MM EVK(RevB)

"https://community.nxp.com/t5/i-MX-Processors/How-use-USB-as-both-gadget-mode-and-host-mode-usb-USB-O...

[divyeshmarne0]

Hi @joanxie ,

any update on above comment?