[U-Boot] [PATCH] usb: dwc2-otg: make regs_phy (in platdata) a uintptr_t

[Philipp Tomsich]

Marek,

I need the below change before I can apply an overdue series to the rockchip tree.
Please review and let me know if it’s ok for you that I pick this one through the 
rockchip tree, so I can put the Rock960 series on top…

Thanks,
Philipp.

> On 06.12.2018, at 01:32, Philipp Tomsich <philipp.tomsich at theobroma-systems.com> wrote:
> 
> The regs_phy field of the platform data structure for dwc2-otg is
> today declared an unsigned int, but will eventually be cast into a
> void* for a writel operation.  This triggers errors on modern GCC
> versions.
> 
> E.g. we get the following error with GCC 6.3:
>  drivers/usb/phy/rockchip_usb2_phy.c: In function 'property_enable':
>  arch/arm/include/asm/io.h:49:29: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
>   #define __arch_putl(v,a)  (*(volatile unsigned int *)(a) = (v))
>                               ^
>  arch/arm/include/asm/io.h:117:48: note: in expansion of macro '__arch_putl'
>   #define writel(v,c) ({ u32 __v = v; __iowmb(); __arch_putl(__v,c); __v; })
>                                                  ^~~~~~~~~~~
>  drivers/usb/phy/rockchip_usb2_phy.c:61:2: note: in expansion of macro 'writel'
>    writel(val, pdata->regs_phy + reg->offset);
>    ^~~~~~
> 
> This commit changes regs_phy to be a uintptr_t to ensure that it is
> large enough to hold any valid pointer (and fix the associated
> warning).
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
> include/usb/dwc2_udc.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/usb/dwc2_udc.h b/include/usb/dwc2_udc.h
> index 62e3236..4068de0 100644
> --- a/include/usb/dwc2_udc.h
> +++ b/include/usb/dwc2_udc.h
> @@ -14,7 +14,7 @@ struct dwc2_plat_otg_data {
> 	void		*priv;
> 	int		phy_of_node;
> 	int		(*phy_control)(int on);
> -	unsigned int	regs_phy;
> +	uintptr_t	regs_phy;
> 	uintptr_t	regs_otg;
> 	unsigned int    usb_phy_ctrl;
> 	unsigned int    usb_flags;
> -- 
> 2.1.4
>