Re: [PATCH] lis3lv02d: add axes knowledge of HP Pavilion dv5 models

Andrew Morton
2009-02-10T23:17:51Z

On Tue, 10 Feb 2009 23:48:14 +0100
Giuseppe Bilotta <giuseppe.bilotta@gmail.com> wrote:

> On Tue, Feb 10, 2009 at 10:39 PM, Giuseppe Bilotta
> <giuseppe.bilotta@gmail.com> wrote:
> > On Tue, Feb 10, 2009 at 11:10 AM, Pavel Machek <pavel@suse.cz> wrote:
> >>
> >> Yeah, that patch. Not sure what to do next... you could grab lis3
> >> manual and see if you can setup chip by hand to get better results...
> >
> > As Eric pointed out, it looks definitely like an endianness problem,
> > although there are a few strange things which are happening at the
> > same time. Is the lis3 manual available online somewhere, or can I
> > request it to the mfgr?
>
> 'k, found it on the STMicroelectronics website. Reading the doc about
> LIS3LV02DL I see that WHO_AM_I should return 3Ah, but my sensor
> returns 3Bh. I'll see if I find the correct datasheet for this one
> instead, it might have info about the differences.
>
> One thing that I noticed is that (modulo axis inversion) I'm able to
> use the sensor correctly if I set the thing to only use the high byte,
> totally discarding the lower byte:
> return *((s8*)(&hi));
> Maybe this sensor needs a different setup to return 12 instead of 8
> bits of information.
>

I've lost the plot here. I still intend to merge
lis3lv02d-add-axes-knowledge-of-hp-pavilion-dv5-models.patch into
2.6.29. Someone please stop me if that is wrong.