[U-Boot-Users] mvbc_p board: build warnings

["André Schwarz" <andre.schwarz@matrix-vision.de>]

Wolfgang,

thanks - I'll fix it on monday/tuesday and send a patch after testing 
the -rc2.

regards,
Andr?

Wolfgang Denk schrieb:
> Hi,
> 
> I'm trying to clean up the build warnings for the mvbc_p board.
> I've succeded with all but this one:
> 
> mvbc_p.c: In function 'mvbc_init_gpio':
> mvbc_p.c:124: warning: dereferencing type-punned pointer will break strict-aliasing rules
> 
> This relates to the following code:
> 
> 115         out_be32(&gpio->simple_ddr, SIMPLE_DDR);
> 116         out_be32(&gpio->simple_dvo, SIMPLE_DVO);
> 117         out_be32(&gpio->simple_ode, SIMPLE_ODE);
> 118         out_be32(&gpio->simple_gpioe, SIMPLE_GPIOEN);	<== volatile u8 outo_gpioe;
> 119
> 120         out_be32((u32*)&gpio->sint_ode, SINT_ODE);		<== volatile u8 sint_ode;
> 121         out_be32((u32*)&gpio->sint_ddr, SINT_DDR);		<== volatile u8 sint_ddr;
> 122         out_be32((u32*)&gpio->sint_dvo, SINT_DVO);		<== volatile u8 sint_dvo;
> 123         out_be32((u32*)&gpio->sint_inten, SINT_INTEN);	<== volatile u8 sint_inten;
> 124         out_be32((u32*)&gpio->sint_itype, SINT_ITYPE);	<== volatile u16 sint_itype;
> 125         out_be32((u32*)&gpio->sint_gpioe, SINT_GPIOEN);	<== volatile u8 outo_gpioe;
> 
> 
> I don't know why the warning is only issued for the  "u16"  type  and
> not  also for the "u8" ones, but anyway: Is the casting to "u32*" and
> using out_be32() here really correct?
> 
> I would expect to see some out_be8() and one out_be16() here?
> 
> Best regards,
> 
> Wolfgang Denk
> 


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