[PATCH 2/2] mxc: enable EHCI PER clock
gwenhael.goavec
gwenhael.goavec-merou at armadeus.com
Tue Jan 8 07:52:30 EST 2013
On Wed, 19 Dec 2012 21:29:26 +0100
Sascha Hauer <s.hauer at pengutronix.de> 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 <gwenhael.goavec-merou at armadeus.com>
> > ---
> > 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.
Gwenhaël
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