On Fri, 2017-11-03 at 11:46 -0700, Srinivas Pandruvada wrote:
> On Fri, 2017-11-03 at 20:14 +0200, Andy Shevchenko wrote:
> > On Fri, 2017-11-03 at 20:08 +0200, Andy Shevchenko wrote:
> > > On Fri, 2017-11-03 at 19:56 +0200, Andy Shevchenko wrote:
> > > > The ID is added to proper sensor by the commit 6ed5ac50a3e0
> > > > ("iio: imu: inv_mpu6050: ACPI enumeration").
> > > >
> > > > Remove it from wrong place, otherwise user will get:
> > > >
> > > > ak8975 i2c-INVN6500:00: mounting matrix not found: using
> > > > identity...
> > > > ak8975 i2c-INVN6500:00: Unexpected device
> > > >
> > >
> > > After applying I have got
> > >
> > > inv-mpu6050-i2c i2c-INVN6500:00: mounting matrix not found: using
> > > identity...
> > >
> > > ...
> > >
> > > i2c i2c-4: Added multiplexed i2c bus 14
> > > ak8975 14-000c: mounting matrix not found: using identity...
> > >
> > >
> > > Nevertheless, I didn't try before with both drivers enabled. It
> > > might
> > > be
> > > that my fix is not needed.
> > >
> > > Shrinivas, can you comment on this?
> >
> > DSDT looks promising:
> >
> > Device (SENS) {
> > Name (_HID, "INVN6500" /* InvenSense MPU-6500 Six Axis Gyroscope
> > and
> > Accelerometer */)
> > ...
> >
> > Name (CNF0, Package (0x04) {
> > Package (0x04) { "MPU6500", ... },
> > Package (0x04) { "MPU6500", ... },
> > Package (0x04) { "AK8963", ... },
> >
> > Thus it is properly enumerated IIUC.
> >
> > I think the patch at the end is correct.
>
> The AK8963 is using INVN6500. The reason is that this INVN 6500 has
> another master mode where a secondary sensor can be connected to it as
> an i2c slave.
> So Windows config uses this mode and hence added in the same package.
>
> But Linux INVN driver is not capable of this master mode. We use
> something called "bypass" mode. In this the second sensor will also be
> directly connected to host i2c. We have another driver handling this
> sensor (ak8975), so we have to add this id.
But ak8975 is enumerated. See above log. So, I think the INVN6500 ID in
ak 8975 driver is simple not required.
--
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy
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