[U-Boot] [PATCH 5/6] usb: am437x: Add support for am437x xhci USB host

[Marek Vasut <marex@denx.de>]

Dear Dan Murphy,

> Add the support for the am437x xhci usb host.
> 
> The xHCI host on AM437 is connected to a usb2 phy so need to
> add support to enable those clocks.
> 
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
>  arch/arm/include/asm/arch-am33xx/hardware_am43xx.h |   10 +++++++++
>  drivers/usb/phy/omap_usb_phy.c                     |   23
> ++++++++++++++++++++ include/configs/am43xx_evm.h                       | 
>  11 ++++++++++ include/linux/usb/xhci-omap.h                      |    4
> ++++
>  4 files changed, 48 insertions(+)
> 
> diff --git a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h index
> 303c594..3b665e6 100644
> --- a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> +++ b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
> @@ -51,4 +51,14 @@
>  /* RTC base address */
>  #define RTC_BASE			0x44E3E000
> 
> +/* USB Clock Control */
> +#define PRM_PER_USB_OTG_SS0_CLKCTRL (CM_PER + 0x260)
> +#define PRM_PER_USB_OTG_SS1_CLKCTRL (CM_PER + 0x268)
> +#define USBOTGSSX_CLKCTRL_MODULE_EN	(1 << 2)
> +#define USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960 (1 << 8)
> +
> +#define PRM_PER_USBPHYOCP2SCP0_CLKCTRL (CM_PER + 0x5b8)
> +#define PRM_PER_USBPHYOCP2SCP1_CLKCTRL (CM_PER + 0x5c0)
> +#define USBPHYOCPSCP_MODULE_EN	(1 << 2)
> +
>  #endif /* __AM43XX_HARDWARE_AM43XX_H */
> diff --git a/drivers/usb/phy/omap_usb_phy.c
> b/drivers/usb/phy/omap_usb_phy.c index f1da73d..20c4805 100644
> --- a/drivers/usb/phy/omap_usb_phy.c
> +++ b/drivers/usb/phy/omap_usb_phy.c
> @@ -207,6 +207,25 @@ void usb_phy_power(int on)
>  }
>  #endif /* CONFIG_OMAP_USB2PHY2_HOST */
> 
> +#ifdef CONFIG_AM437X_USB2PHY2_HOST
> +static void am437x_enable_usb2_phy2(struct omap_xhci *omap)
> +{
> +	int usb_otg_ss_clk_val = (USBOTGSSX_CLKCTRL_MODULE_EN |
> +				USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);

Other than that it should be "const", it should also be at least unsigned. And 
prefferably u32 .

Best regards,
Marek Vasut