Em Sat, 6 Jun 2009 15:00:48 +0200
Hans Verkuil <[email protected]> escreveu:
> Hi all,
>
> For video4linux we sometimes need to probe for a single i2c address.
> Normally you would do it like this:
>
> static const unsigned short addrs[] = {
> addr, I2C_CLIENT_END
> };
>
> client = i2c_new_probed_device(adapter, &info, addrs);
>
> This is a bit awkward and I came up with this macro:
>
> #define V4L2_I2C_ADDRS(addr, addrs...) \
> ((const unsigned short []){ addr, ## addrs, I2C_CLIENT_END })
>
> This can construct a list of one or more i2c addresses on the fly. But this
> is something that really belongs in i2c.h, renamed to I2C_ADDRS.
>
> With this macro we can just do:
>
> client = i2c_new_probed_device(adapter, &info, I2C_ADDRS(addr));
>
> Comments?
Seems fine for me, but Your define has V4L2_foo.
Since this has nothing to do with V4L2, IMO, it is better to declare it as:
#define I2C_ADDRS(addr, addrs...) \
((const unsigned short []){ addr, ## addrs, I2C_CLIENT_END })
Cheers,
Mauro
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