Hi Il 23/giu/2014 23:26 "Felipe Balbi" <ba...@ti.com> ha scritto: > > Newer AM437x silicon requires us to explicitly power up > the USB2 PHY. By implementing usb_phy_power() we can > achieve that. > > Signed-off-by: Felipe Balbi <ba...@ti.com> > --- > drivers/usb/phy/omap_usb_phy.c | 17 ++++++++++++++++- > 1 file changed, 16 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/phy/omap_usb_phy.c b/drivers/usb/phy/omap_usb_phy.c > index af46db2..0ed3e70 100644 > --- a/drivers/usb/phy/omap_usb_phy.c > +++ b/drivers/usb/phy/omap_usb_phy.c > @@ -222,7 +222,22 @@ static void am437x_enable_usb2_phy2(struct omap_xhci *omap) > > void usb_phy_power(int on) > { > - return; > + u32 val; > + > + /* USB1_CTRL */ > + val = readl(0x44e10628);
Can you please describe 0x44e... > + if (on) { > + /* > + * these bits are re-used on AM437x to power up/down the USB > + * CM and OTG PHYs, if we don't toggle them, USB will not be > + * functional on newer silicon revisions > + */ > + val &= ~0x3; > + } else { > + val |= 0x3; ditto > + } > + > + writel(val, 0x44e10628); ditto > } > #endif /* CONFIG_AM437X_USB2PHY2_HOST */ > Michael > -- > 2.0.0.390.gcb682f8 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot
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