Dear Simon Glass,
In message <banlktimcgqbih16u7772-ukhb0buyapbe14mnq91zhqi1ss...@mail.gmail.com>
you wrote:
>
> OK I understand, thank you. How about this approach: we could add a
> new macro to io.h, something like:
>
> #define clrsetfield_le32(bitfield, addr, value) ...
>
> Then caller can define these in a header file:
>
> #define FIELD_MASK 0xf0000
> #define FIELD_SHIFT 16
>
> And use this macro to set the bitfield to 6, for example:
>
> clrsetfield_le32(FIELD, &my_device->ctrl, 6)
>
> (this will simply shift the value left 16 bits and apply the supplied mask)
>
> This captures the essence of bitfields, in that we are abstracting the
> field under a single name. The change would just add this macro to the
> io.h header file.
Sorry, I fail to understand how you envision to use this, and how it
would be different from clrsetbits*() ?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
No one wants war.
-- Kirk, "Errand of Mercy", stardate 3201.7
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