On Wed, Jul 09, 2014 at 11:02:43PM -0500, Felipe Balbi wrote: > 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> > ---
the only change here is the use of {set,clr}bits_le32()
> arch/arm/include/asm/arch-am33xx/hardware_am43xx.h | 5 +++++
> drivers/usb/phy/omap_usb_phy.c | 11 ++++++++++-
> 2 files changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> index b470319..efdecf4 100644
> --- a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> +++ b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> @@ -43,6 +43,11 @@
> #define VTP0_CTRL_ADDR 0x44E10E0C
> #define VTP1_CTRL_ADDR 0x48140E10
>
> +/* USB CTRL Base Address */
> +#define USB1_CTRL 0x44e10628
> +#define USB1_CTRL_CM_PWRDN BIT(0)
> +#define USB1_CTRL_OTG_PWRDN BIT(1)
> +
> /* DDR Base address */
> #define DDR_PHY_CMD_ADDR 0x44E12000
> #define DDR_PHY_DATA_ADDR 0x44E120C8
> diff --git a/drivers/usb/phy/omap_usb_phy.c b/drivers/usb/phy/omap_usb_phy.c
> index af46db2..53778b3 100644
> --- a/drivers/usb/phy/omap_usb_phy.c
> +++ b/drivers/usb/phy/omap_usb_phy.c
> @@ -222,7 +222,16 @@ static void am437x_enable_usb2_phy2(struct omap_xhci
> *omap)
>
> void usb_phy_power(int on)
> {
> - return;
> + /*
> + * In order to get USB working on newer AM43xx silicon, we must
> + * explicitly power the USB PHYs.
> + */
> + if (on)
> + clrbits_le32(USB1_CTRL, USB1_CTRL_CM_PWRDN |
> + USB1_CTRL_OTG_PWRDN);
> + else
> + setbits_le32(USB1_CTRL, USB1_CTRL_CM_PWRDN |
> + USB1_CTRL_OTG_PWRDN);
> }
> #endif /* CONFIG_AM437X_USB2PHY2_HOST */
>
> --
> 2.0.0.390.gcb682f8
>
--
balbi
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