linux-kernel - RE: [PATCH 01/11] misc: inv_mpu primary header file and README file.

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Date:	Tue, 5 Jul 2011 11:08:33 -0700
From:	Nathan Royer <nroyer@...ensense.com>
To:	Chris Wolfe <cwolfe@...omium.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Jonathan Cameron <jic23@....ac.uk>,
	Jiri Kosina <jkosina@...e.cz>, Alan Cox <alan@...ux.intel.com>,
	Jean Delvare <khali@...ux-fr.org>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: RE: [PATCH 01/11] misc: inv_mpu primary header file and README file.

> Is this
> driver to the stage where someone can practically initialize the 3050
> and read low-level data without having the InvenSense MPL already
> installed? (and without basically doing I2C reads and writes from
> userspace)

Yes, this driver could be used to initialize the 3050 and do raw data reads
without the MPL library.  I haven't actually tried it, but you would set the
dmp_enable = 0, fifo_enable = 0 and on each IRQ do a read of
MPUREG_GYRO_XOUT_H..MPUREG_GYRO_ZOUT_L using the IOCTL MPU_READ.

To take advantage of the DMP, and the Master I2C bus you will need the MPL
library in user space.
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