lkml.org 
[lkml]   [2013]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] mfd: tps6586x: add version detection
On Wed, 27 Nov 2013, Stefan Agner wrote:

> Am 2013-11-27 16:30, schrieb Lee Jones:
> > On Wed, 27 Nov 2013, Stefan Agner wrote:
> >
> >> Am 2013-11-27 15:36, schrieb Lee Jones:
> >> <snip>
> >> >> Perhaps I should suggest to make TPS6586X_ANY a positive number then,
> >> >> as a negative value to me indicates more of an error than a generic
> >> >> parameter.
> >> I see, its especially confusing since the version is filled using the
> >> i2c_smbus_read_byte_data functions return value. The version field is a
> >> 8-Bit value according to the data sheet, I could use 0x100 as
> >> TPS6586X_ANY identifier.
> >
> > How far are we away from using 0xFF?
> >
> > I'd be happy to use that and change it _if_ we ever get close.
> >
> > If it's likely that it'll be used, then sure 0x100 sounds okay too.
>
> Yes, I thought about 0xFF too. The latest device we support is TPS658643
> (according to data sheet release dates), which has the smallest version
> number (03). Since it seems to be a CRC (hence VERSIONCRC) the number is
> quite random. Also, 0xFF sounds like a bitmask which can mask all
> versions, but the versions can't be used bitwise... So I would prefer to
> go with 0x100.

Deal!

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2013-11-27 17:41    [W:0.053 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site