[U-Boot] [PATCH] usb: ehci-mx5: Fix bus enumeration for DM case

[Lukasz Majewski <lukma@denx.de>]

Hi Marek,

> On Thu, 20 Jun 2019 22:53:58 +0200
> Marek Vasut <marex@denx.de> wrote:
> 
> > It is likely that the DM conversion of EHCI iMX5 driver was a
> > derivative of EHCI VF, however the conversion is incomplete and is
> > missing the bind workaround, which updates dev->seq number. Without
> > this, all controllers have dev->seq number 0 . Add this bind
> > workaround into EHCI iMX5 driver as well.
> > 
> > Signed-off-by: Marek Vasut <marex@denx.de>
> > Cc: Abel Vesa <abel.vesa@nxp.com>
> > Cc: Adam Ford <aford173@gmail.com>
> > Cc: Fabio Estevam <festevam@gmail.com>
> > Cc: Ludwig Zenz <lzenz@dh-electronics.com>
> > Cc: Peng Fan <peng.fan@nxp.com>
> > Cc: Stefano Babic <sbabic@denx.de>
> > Cc: Vagrant Cascadian <vagrant@debian.org>
> > ---
> >  drivers/usb/host/ehci-mx5.c | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> > 
> > diff --git a/drivers/usb/host/ehci-mx5.c
> > b/drivers/usb/host/ehci-mx5.c index 0b32728c57..4db513f4e5 100644
> > --- a/drivers/usb/host/ehci-mx5.c
> > +++ b/drivers/usb/host/ehci-mx5.c
> > @@ -301,6 +301,22 @@ static int ehci_usb_ofdata_to_platdata(struct
> > udevice *dev) return 0;
> >  }
> >  
> > +static int ehci_usb_bind(struct udevice *dev)
> > +{
> > +	static int num_controllers;
> > +
> > +	/*
> > +	 * Without this hack, if we return ENODEV for USB
> > Controller 0, on
> > +	 * probe for the next controller, USB Controller 1 will be
> > given a
> > +	 * sequence number of 0. This conflicts with our
> > requirement of
> > +	 * sequence numbers while initialising the peripherals.
> > +	 */
> > +	dev->req_seq = num_controllers;
> > +	num_controllers++;
> > +
> > +	return 0;
> > +}
> > +
> >  static int ehci_usb_probe(struct udevice *dev)
> >  {
> >  	struct usb_platdata *plat = dev_get_platdata(dev);
> > @@ -362,6 +378,7 @@ U_BOOT_DRIVER(usb_mx5) = {
> >  	.id	= UCLASS_USB,
> >  	.of_match = mx5_usb_ids,
> >  	.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
> > +	.bind	= ehci_usb_bind,
> >  	.probe	= ehci_usb_probe,
> >  	.remove = ehci_deregister,
> >  	.ops	= &ehci_usb_ops,  
> 
> Tested-by: Lukasz Majewski <lukma@denx.de>
> 
> Tested on HSC|DDC i.MX53 board (usb start works as previously).
> 

Gentle ping on this patch :-)

It must have been overlooked in some way ...

Marek, could you please apply this fix?

Otherwise kp_imx53 boards (and probably some other ones) are broken -
and cannot be easily debricked.

> master branch
> SHA1:  77f6e2dd0551d8a825bab391a1bd6b838874bcd4

It applies also on top of newest -master:

SHA1: 8e51bf746a11d7f67416859da73a83109af4e0a3

Thanks in advance.

> 
> Best regards,
> 
> Lukasz Majewski
> 
> --
> 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email:
> lukma at denx.de


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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