Re: [PATCH v10] i2c-designware: make SDA hold time configurable

From: Arnd Bergmann
Date: Wed Jul 03 2013 - 11:27:35 EST


On Wednesday 03 July 2013, Stehle Vincent-B46079 wrote:
> > From: Christian Ruppert [mailto:christian.ruppert@xxxxxxxxxx]
> (..)
> > Although this doesn't explicitly state what the function returns to me
> > this sounds more like the quotient is returned rather than the remainder?
>
> Hi,
>
> Yes div_u64() returns the quotient.
>
> It is defined in linux/math64.h as:
>
> static inline u64 div_u64(u64 dividend, u32 divisor)
> {
> u32 remainder;
> return div_u64_rem(dividend, divisor, &remainder);
> }
>
> The remainder is probably fully optimized out.

Ah, you are right, sorry for the confusion on my part.

I thought you had used do_div() rather than div_u64().
Everything's fine then, feel free to add my

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

to your patch.

Arnd
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