Subject: [PATCH 2/2] mxc: enable EHCI PER clock

From: [email-masked] (gwenhael.goavec)
Date: Tue, 8 Jan 2013 13:52:30 +0100

On Wed, 19 Dec 2012 21:29:26 +0100
Sascha Hauer <[email-masked]> wrote:

> On Wed, Dec 19, 2012 at 07:29:37PM +0100, Gwenhael Goavec-Merou wrote:
> > EHCI PER clock (aka usb_div) must be enabled to have EHCI driver working.
> > 
> > Signed-off-by: Gwenhael Goavec-Merou <[email-masked]>
> > ---
> >  drivers/usb/host/ehci-mxc.c |   12 +++++++++++-
> >  1 files changed, 11 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
> > index ec7f5d2..8050631 100644
> > --- a/drivers/usb/host/ehci-mxc.c
> > +++ b/drivers/usb/host/ehci-mxc.c
> > @@ -31,7 +31,7 @@
> >  #define ULPI_VIEWPORT_OFFSET	0x170
> >  
> >  struct ehci_mxc_priv {
> > -	struct clk *usbclk, *ahbclk, *phyclk;
> > +	struct clk *usbclk, *ahbclk, *perclk, *phyclk;
> >  	struct usb_hcd *hcd;
> >  };
> >  
> > @@ -150,6 +150,13 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
> >  	}
> >  	clk_prepare_enable(priv->ahbclk);
> >  
> > +	priv->perclk = devm_clk_get(&pdev->dev, "per");
> > +	if (IS_ERR(priv->perclk)) {
> > +		ret = PTR_ERR(priv->perclk);
> > +		goto err_clk_per;
> > +	}
> > +	clk_prepare_enable(priv->perclk);
> 
> Have you checked this clock is present on all SoCs using this driver?
> 
Yes
>
> Other than that, +1 on using the chipidea driver as Fabio and Marek
> already noted.
>
True. But I need to use a non-dt board based on imx27. Chipidea is
not working yet for this chip and I have currently not enough time to do that.

Gwenha?l