topic Re: IMX287: usb0_vbus: disabling in i.MX Processors

IMX287: usb0_vbus: disabling

BrilliantovKiri — Mon, 02 Mar 2015 13:57:20 GMT

Hello!

I work linux-3.18 from Freescale/linux-fslc · GitHub on custom board with iMX287 CPU.

USB schema:

Pin	Pad
USB0_ID	J5
USB0_D_P	B10
USB0_D_M	A10
USB0_OVERCURRENT	K5
USB1_D_M	B8
USB1_D_P	A8
USB1_OVERCURRENT	K8

DTS-file:

ahb@80080000 {

usb0: usb@80080000 {

pinctrl-names = "default";

pinctrl-0 = <&usb0_id_pins_a>;

vbus-supply = <&reg_usb0_vbus>;

status = "okay";

};

usb1: usb@80090000 {

vbus-supply = <&reg_usb1_vbus>;

status = "okay";

};

regulators {

compatible = "simple-bus";

reg_usb0_vbus: usb0_vbus {

compatible = "regulator-fixed";

regulator-name = "usb0_vbus";

regulator-min-microvolt = <5000000>;

regulator-max-microvolt = <5000000>;

gpio = <&gpio1 24 GPIO_ACTIVE_HIGH>;

enable-active-high;

};

reg_usb1_vbus: usb1_vbus {

compatible = "regulator-fixed";

regulator-name = "usb1_vbus";

regulator-min-microvolt = <5000000>;

regulator-max-microvolt = <5000000>;

gpio = <&gpio1 27 GPIO_ACTIVE_HIGH>;

enable-active-high;

};

dmesg output:

~ # dmesg | grep usb

[ 0.708009] usb0_vbus: 5000 mV

[ 0.713149] usb1_vbus: 5000 mV

[ 1.653267] usb1_vbus: disabling

[ 1.656738] usb0_vbus: disabling

Bacause USB is disabled problem in configuration and I not understand gpio configuration in usb_vbus.

Can you help me?

Thank you and excuse my bad english.

Re: IMX287: usb0_vbus: disabling

BrilliantovKiri — Mon, 02 Mar 2015 14:35:39 GMT

Ok, I understang GPIO configuration:

USB0 power is LCS_RD pin, USB1 - LCD_CS.

pinctrl@80018000 {

pinctrl-names = "default";

pinctrl-0 = <&hog_pins_a>;

hog_pins_a: hog@0 {

reg = <0>;

fsl,pinmux-ids = <

// 0x31e3 /* Relay1 */

// 0x1193 /* Relay2 */

0x40d3 /* FEC RESET */

0x11B3 /* USB1 PWR */

0x1183 /* USB0 PWR */

fsl,drive-strength = <0>;

fsl,voltage = <1>;

fsl,pull-up = <0>;

};

#define MX28_PAD_LCD_RD_E__GPIO_1_24 0x1183

#define MX28_PAD_LCD_CS__GPIO_1_27

0x11b3

But why USB is disabled?

Re: IMX287: usb0_vbus: disabling

igorpadykov — Tue, 03 Mar 2015 04:50:05 GMT

Hi Kirill

do you have 5V applied to i.MX28 VDD5V pad ?

Best regards

igor

Re: IMX287: usb0_vbus: disabling

BrilliantovKiri — Tue, 03 Mar 2015 06:46:19 GMT

I think yes, because with linux-2.6.35 all work.

I add regulator-always-on in description and this solve problem, now dmesg not contained usb1_vbus: disabling.

But after conect device to USB port I not see messages about this, system not register new USB device.

Re: IMX287: usb0_vbus: disabling

BrilliantovKiri — Tue, 03 Mar 2015 08:32:49 GMT

Problem solved, right way - enable CONFIG_USB_CHIPIDEA in linux.