linux-kernel - Re: [PATCHv4] phy: mapphone-mdm6600: Add USB PHY driver for MDM6600 on Droid 4

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Message-ID: <20180322164633.GF5799@atomide.com>
Date:   Thu, 22 Mar 2018 09:46:33 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Marcel Partap <mpartap@....net>,
        Michael Scott <michael.scott@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCHv4] phy: mapphone-mdm6600: Add USB PHY driver for MDM6600
 on Droid 4

* Pavel Machek <pavel@....cz> [180322 13:57]:
> Hi!
> 
> > idle lcd off	phy-mapphone-mdm6600	ohci-platform
> > 153mW		284mW			344mW
> > 
> > So it seems that MDM6600 is currently not yet idling even with it's
> > radio turned off, but that's something that is beyond the control of
> > this USB PHY driver. This patch does get us to the point where modem
> > data and GPS are usable with libqmi and ModemManager for example.
> > Voice calls need more audio driver work.
> 
> Ok, let me try. I believe I should see the modem device on lsusb, but
> I don't.
> 
> user@...uan:/sys/devices/platform/44000000.ocp/4a064000.usbhshost$
> sudo lsusb
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> user@...uan:/sys/devices/platform/44000000.ocp/4a064000.usbhshost$
> zcat /proc/config.gz | grep MAPPH
> CONFIG_PHY_MAPPHONE_MDM6600=y
> user@...uan:/sys/devices/platform/44000000.ocp/4a064000.usbhshost$
> zcat /proc/config.gz | grep OHCI_
> CONFIG_USB_OHCI_LITTLE_ENDIAN=y
> CONFIG_USB_OHCI_HCD=y
> CONFIG_USB_OHCI_HCD_OMAP3=y
> CONFIG_USB_OHCI_HCD_PLATFORM=y
> user@...uan:/sys/devices/platform/44000000.ocp/4a064000.usbhshost$
> 
> As far as I can tell,
> 
> +CONFIG_USB_WDM=y
> +CONFIG_USB_SERIAL=y
> +CONFIG_USB_SERIAL_QUALCOMM=y
> +CONFIG_USB_SERIAL_WWAN=y
> 
> should be enabled to enable the drivers (and I did that), but without
> device showing on the bus...
> 
> Any ideas?

Do you have the related dts patches picked from next?

fdd192037fce ("ARM: dts: omap4-droid4: Fix USB PHY port naming")
e5b9fd7bdeb5 ("ARM: dts: omap4-droid4: Configure MDM6600 USB PHY")

But yeah all you need to do is have phy-mapphone-mdm6600 and
ohci-platform loaded and then ifconfig should show four wwan
interfaces being added.

Regards,

Tony


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