linux-kernel - [PATCH 0/2] iio: imu: inv-mpu9150: fix interrupts for MPU9150

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Message-Id: <20251231-mpu9150-v1-0-08ecf085c4ae@kernel.org>
Date: Wed, 31 Dec 2025 22:14:15 +0100
From: akemnade@...nel.org
To: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@....com>, 
 Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Aaro Koskinen <aaro.koskinen@....fi>, 
 Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...libre.com>, 
 Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-omap@...r.kernel.org, devicetree@...r.kernel.org, 
 Andreas Kemnade <akemnade@...nel.org>
Subject: [PATCH 0/2] iio: imu: inv-mpu9150: fix interrupts for MPU9150

The Epson Moverio BT200 has MPU9150 chips. The devicetree has a simple
typo regarding the interrupt of that chip. Simply fixing it unweils
problems in the driver causing IRQ storms by calling
iio_readdev -T 0 iio:deviceX 

With the fix applied one IRQ comes per sampling when calling
iio_readdev -T 0 iio:deviceX which looks like sane behaviour.
Probably applying this series has to be split between different kernel
releases to avoid having fixed devicetree with broken driver.

Signed-off-by: Andreas Kemnade <akemnade@...nel.org>
---
Andreas Kemnade (2):
      iio: imu: inv-mpu9150: fix irq ack preventing irq storms
      ARM: dts: ti/omap: omap4-epson-embt2ws: fix typo in iio device property

 arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts | 4 ++--
 drivers/iio/imu/inv_mpu6050/inv_mpu_core.c        | 8 ++++++++
 drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h         | 2 ++
 drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c     | 5 ++++-
 4 files changed, 16 insertions(+), 3 deletions(-)
---
base-commit: f8f9c1f4d0c7a64600e2ca312dec824a0bc2f1da
change-id: 20251231-mpu9150-0f261490d17e

Best regards,
--  
Andreas Kemnade <akemnade@...nel.org>