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- Configuring imx8mm to not use USB Type-C
Configuring imx8mm to not use USB Type-C
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Configuring imx8mm to not use USB Type-C
08-04-2022
06:45 AM
1,657件の閲覧回数
jclsn
Contributor IV
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Our custom board doesn't use a USB Type-C connector. Our device tree is based on the imx8mm-evk.dts. We therefore have modified the device tree to no use it with the following patch:
diff --git a/arch/arm/dts/custom-imx8mm.dts b/arch/arm/dts/custom-imx8mm.dts
index 4a4fd8ca0d2..33630081e84 100644
--- a/arch/arm/dts/custom-imx8mm.dts
+++ b/arch/arm/dts/custom-imx8mm.dts
@@ -35,6 +35,15 @@
startup-delay-us = <100>;
off-on-delay-us = <12000>;
};
+
+ reg_usbotg1_vbus: regulator-usbotg1-vbus {
+ compatible = "regulator-fixed";
+ regulator-name = "usbotg1_vbus";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ gpio = <&gpio1 12 0>;
+ enable-active-high;
+ };
};
&iomuxc {
@@ -230,6 +239,12 @@
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0xc6
>;
};
+
+ pinctrl_usbotg1: usbotg1grp {
+ fsl,pins = <
+ MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12 0x6 /* AB10 GPIO1_IO12 GPIO1_IO12 USB1_OTG_PWR_1V8 */
+ >;
+ };
};
};
@@ -400,32 +415,6 @@
scl-gpios = <&gpio5 16 GPIO_ACTIVE_HIGH>;
sda-gpios = <&gpio5 17 GPIO_ACTIVE_HIGH>;
status = "okay";
-
- typec_ptn5110_1: ptn5110@50 {
- compatible = "usb,tcpci";
- reg = <0x50>;
- src-pdos = <0x380190c8>;
- snk-pdos = <0x380190c8 0x3802d0c8>;
- max-snk-mv = <9000>;
- max-snk-ma = <2000>;
- op-snk-mw = <9000>;
- max-snk-mw = <18000>;
- port-type = "drp";
- default-role = "sink";
- };
-
- typec_ptn5110_2: ptn5110@52 {
- compatible = "usb,tcpci";
- reg = <0x52>;
- src-pdos = <0x380190c8>;
- snk-pdos = <0x380190c8 0x3802d0c8>;
- max-snk-mv = <9000>;
- max-snk-ma = <2000>;
- op-snk-mw = <9000>;
- max-snk-mw = <18000>;
- port-type = "drp";
- default-role = "sink";
- };
};
&i2c3 {
@@ -513,12 +502,15 @@
arm-supply = <&buck2_reg>;
};
-&usbotg1 {
+&usbotg1 { /* USB1 (Type Micro) */
+ vbus-supply = <®_usbotg1_vbus>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usbotg1>;
+ dr_mode = "otg";
status = "okay";
- extcon = <&typec_ptn5110_1>;
};
-&usbotg2 {
+&usbotg2 { /* USB2 (Type A) */
+ dr_mode = "host";
status = "okay";
- extcon = <&typec_ptn5110_2>;
};
In the latest uboot-imx version the USB section of the device tree looks quite different though. I have tried
diff --git a/arch/arm/dts/custom-imx8mm.dtsi b/arch/arm/dts/custom-imx8mm.dtsi
index a0161c2f53..f720a08b38 100644
--- a/arch/arm/dts/custom-imx8mm.dtsi
+++ b/arch/arm/dts/custom-imx8mm.dtsi
@@ -41,6 +41,15 @@
enable-active-high;
};
+ reg_usbotg1_vbus: regulator-usbotg1-vbus {
+ compatible = "regulator-fixed";
+ regulator-name = "usbotg1_vbus";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ gpio = <&gpio1 12 0>;
+ enable-active-high;
+ };
+
ir-receiver {
compatible = "gpio-ir-receiver";
gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
@@ -312,34 +321,34 @@
};
};
- 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;
- };
- };
+ /* 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; */
+ /* }; */
+ /* }; */
};
&i2c3 {
@@ -378,22 +387,35 @@
status = "okay";
};
-&usbotg1 {
- dr_mode = "otg";
- hnp-disable;
- srp-disable;
- adp-disable;
- usb-role-switch;
- disable-over-current;
- samsung,picophy-pre-emp-curr-control = <3>;
- samsung,picophy-dc-vol-level-adjust = <7>;
- status = "okay";
+/* &usbotg1 { */
+/* dr_mode = "otg"; */
+/* hnp-disable; */
+/* srp-disable; */
+/* adp-disable; */
+/* usb-role-switch; */
+/* disable-over-current; */
+/* samsung,picophy-pre-emp-curr-control = <3>; */
+/* samsung,picophy-dc-vol-level-adjust = <7>; */
+/* status = "okay"; */
+
+/* port { */
+/* usb1_drd_sw: endpoint { */
+/* remote-endpoint = <&typec1_dr_sw>; */
+/* }; */
+/* }; */
+/* }; */
+
+&usbotg1 { /* USB1 (Type Micro) */
+ vbus-supply = <®_usbotg1_vbus>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usbotg1>;
+ dr_mode = "otg";
+ status = "okay";
+};
- port {
- usb1_drd_sw: endpoint {
- remote-endpoint = <&typec1_dr_sw>;
- };
- };
+&usbotg2 { /* USB2 (Type A) */
+ dr_mode = "host";
+ status = "okay";
};
&usdhc2 {
@@ -564,6 +586,12 @@
>;
};
+ pinctrl_usbotg1: usbotg1grp {
+ fsl,pins = <
+ MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12 0x6 /* AB10 GPIO1_IO12 GPIO1_IO12 USB1_OTG_PWR_1V8 */
+ >;
+ };
+
pinctrl_uart2: uart2grp {
fsl,pins = <
MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140
but the USB initialization is failing. I have been looking for quite some time now as to why this is. I have got rid of all the typec-related configurations and the new USB configuration looks correct according to the example from the i.MX8 reference manual.
Can you tell me what is missing?
Thank you
1 返信
09-08-2022
05:19 PM
1,619件の閲覧回数
AldoG
NXP TechSupport
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Hello,
Your configuration does look correct, even one could use the i.MX6 as reference for this:
https://source.codeaurora.org/external/imx/uboot-imx/tree/arch/arm/dts/imx6qdl-sabresd.dtsi?h=lf_v20...
Also, is there any logs you could share regarding the issue you have seen?
Best regards,
Aldo.
