Re: [RFCv1 2/3] ARM: dts: meson8b: odroidc1: fix USB power supplies for phy

[Anand Moon <linux.amoon@gmail.com>]

Hi Martin,

On Mon, 11 Feb 2019 at 03:51, Martin Blumenstingl
<martin.blumenstingl@googlemail.com> wrote:
>
> Hi Anand,
>
> On Sat, Feb 9, 2019 at 6:55 PM Anand Moon <linux.amoon@gmail.com> wrote:
> [...]
> > > > But this dose not work setting the usb1_phy to use vbus-supply.
> > > >
> > > >  &usb1_phy {
> > > >         status = "okay";
> > > > +       vbus-supply = <&usb_vbus>;
> > > >  };
> > > >
> > > > I am attaching a small patch for testing.
> > > > [0] usbvbus.patch
> > > indeed, this is not working for me either.
> > > I checked my old notes at [0] -> it works for me when setting
> > > "vbus-supply" at the usb controller (not the PHY).
> > >
> > > with the following snippet:
> > >   &usb1 {
> > >     status = "okay";
> > >     vbus-supply = <&usb_vbus>;
> > >   };
> > > I get:
> > > # cat /sys/kernel/debug/regulator/regulator_summary | grep -i usb
> > >    c90c0000.usb                  1                                 0mA
> > >     0mV     0mV
> > >    c90c0000.usb                  1                                 0mA
> > >     0mV     0mV
> > >    USB_VBUS                      1    1      0 unknown  5000mV     0mA
> > >  5000mV  5000mV
> > >       c90c0000.usb               1                                 0mA
> > >     0mV     0mV
> > >
> > > can you please try this on your board as well?
> > >
> > > > Here is the summary of the above patch.
> > > >
> > > > 1. hot-plugins of usb device is not working.
> > > > 2. only cold/warm boot let the device come up.
> > > > 3. not power is supplied to the usb ports.
> > > > 4. no power module is registered with the regulator summary.
> > > with "vbus-supply" moved to the usb1 node I get the following result:
> > > 1. same: hot-plugins of usb device is not working
> > > 2. different: a reboot doesn't make devices come up
> > > 3. same: no power is supplied to the USB ports (in my case this causes
> > > #2, but it's not clear why there's no power...)
> > > 4. different: the regulator is registered with the USB controller in debugfs
> > >
> > Here the the logs after I applied the above changes
> >
> > [1] https://pastebin.com/rVa8gxNG
> can you please provide the .dts patch for this log?
> I can see the following message in your log:
> [    1.977367] USB_VBUS: disabling
>
Sorry for the confusion on the logs.
Above logs are generated with below setting.

&usb1 {
   status = "okay";
    vbus-supply = <&usb_vbus>;
 };

> I have tried it with the attached patch, then I get:
> # dmesg | grep VBUS
> #
> # cat /sys/kernel/debug/regulator/regulator_summary
> regulator                      use open bypass  opmode voltage current
>     min     max
> ---------------------------------------------------------------------------------------
> regulator-dummy                  4    3      0 unknown     0mV     0mA
>     0mV     0mV
>    c90c0000.usb                  1                                 0mA
>     0mV     0mV
>    c90c0000.usb                  1                                 0mA
>     0mV     0mV
>    VCCK                          1    1      0 unknown   860mV     0mA
>   860mV  1140mV
>       cpu0                       0                                 0mA
>   860mV   860mV
> P5V0                             3    4      0 unknown  5000mV     0mA
>  5000mV  5000mV
>    VCC1V8                        2    2      0 unknown  1800mV     0mA
>  1800mV  1800mV
>       c1108680.adc               1                                 0mA
>     0mV     0mV
>       c1108e00.mmc               1                                 0mA
>  1800mV  1950mV
>    VCC3V3                        2    3      0 unknown  3300mV     0mA
>  3300mV  3300mV
>       c1108e00.mmc               1                                 0mA
>  3300mV  3400mV
>       VDD_RTC                    0    0      0 unknown   900mV     0mA
>   900mV   900mV
>       TFLASH_VDD                 1    1      0 unknown  3300mV     0mA
>  3300mV  3300mV
>          c1108c20.mmc:slot@1     1                                 0mA
>  3300mV  3400mV
>    DDR_VDDC                      0    0      0 unknown  1500mV     0mA
>  1500mV  1500mV
>    USB_VBUS                      1    1      0 unknown  5000mV     0mA
>  5000mV  5000mV
>       c90c0000.usb               1                                 0mA
>     0mV     0mV
> TF_IO                            0    1      0 unknown  3300mV     0mA
>  1800mV  3300mV
>    c1108c20.mmc:slot@1           0                                 0mA
>     0mV     0mV
>
> (my kernel build includes two more changes on top of Kevin's v5.1/dt
> branch which add two new regulators: it enables the RTC and the SDHC
> MMC controller, but these are not related to USB at all)
>
> USB ist still not working for me, but I believe my problem is
> different to yours.
>
>
> Regards
>
> Martin

Can we have other people who can test both the approach for
*vbus-supply* vs *phy-supply* setting.
Then we can conclude on the correct approach.

Honestly I am using power supply from dc jack rather than power via usb otg.

Best Regards
-Anand