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
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
