Enabling USBH1 on mx53qsb

[Peter Chen]

On Wed, Jul 24, 2013 at 11:59:35PM -0300, Fabio Estevam wrote:
> Hi,
> 
> I am trying to get USBH1 port to work on mx53qsb (with Dialog pmic)
> with the following patch against linux-next-20130724:
> 
> --- a/arch/arm/boot/dts/imx53-qsb.dts
> +++ b/arch/arm/boot/dts/imx53-qsb.dts
> @@ -93,6 +93,15 @@
>                         regulator-max-microvolt = <3200000>;
>                         regulator-always-on;
>                 };
> +
> +               reg_usb_vbus: usb_vbus {
> +                       compatible = "regulator-fixed";
> +                       regulator-name = "usb_vbus";
> +                       regulator-min-microvolt = <5000000>;
> +                       regulator-max-microvolt = <5000000>;
> +                       gpio = <&gpio7 8 0>;
> +                       enable-active-high;
> +               };
>         };
> 
>         sound {
> @@ -145,6 +154,7 @@
>                                 MX53_PAD_EIM_DA12__GPIO3_12       0x80000000
>                                 MX53_PAD_EIM_DA13__GPIO3_13       0x80000000
>                                 MX53_PAD_PATA_DA_0__GPIO7_6       0x80000000
> +                               MX53_PAD_PATA_DA_2__GPIO7_8       0x80000000
>                                 MX53_PAD_GPIO_16__GPIO7_11        0x80000000
>                         >;
>                 };
> @@ -302,7 +312,8 @@
>  };
> 
>  &usbh1 {
> -       status = "okay";
> +       vbus-supply = <&reg_usb_vbus>;
> +       status = "okay";
>  };
> 
>  &usbotg {
> 
> 
> mx53qsb board has two USB host ports:
> 
> - The top port is USBH1
> - The bottom port is OTG (also shared with J3 connector)
> 
> After applying the above patch the OTG port does work, but the USBH1 does not.

Would you enable CONFIG_USB_DEBUG to see where is the problem?

> 
> However, if I access USBH1 within U-boot prior to launching the
> kernel, then I am able to use USBH1 in the kernel succesfully.

access host 1 at u-boot, what do you mean, only register access
or let host 1 work?

If it is really true, that means the kernel may omit some init steps
for host 1, but u-boot has.


-- 

Best Regards,
Peter Chen