From: Martin Kepplinger <martin.kepplinger@puri.sm>
To: robh@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org
Cc: devicetree@vger.kernel.org,
Martin Kepplinger <martin.kepplinger@puri.sm>,
linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de,
linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: dts: librem5-devkit: add lsm9ds1 mount matrix
Date: Mon, 20 Jan 2020 11:07:22 +0100 [thread overview]
Message-ID: <20200120100722.30359-1-martin.kepplinger@puri.sm> (raw)
The IMU chip on the librem5-devkit is not mounted at the "natural" place
that would match normal phone orientation (see the documentation for the
details about what that is).
Since the lsm9ds1 driver supports providing a mount matrix, we can describe
the orientation on the board in the dts:
Create a right-handed coordinate system (x * -1; see the datasheet for the
axis) and rotate 180 degrees around the y axis because the device sits on
the back side from the display.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
---
tested on the librem5-devkit of course, finally fixing the orientation problem
for the accelerometer :)
thanks,
martin
arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 703254282b96..6c8ab009081b 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -457,6 +457,9 @@
reg = <0x6a>;
vdd-supply = <®_3v3_p>;
vddio-supply = <®_3v3_p>;
+ mount-matrix = "1", "0", "0",
+ "0", "1", "0",
+ "0", "0", "-1";
};
};
--
2.20.1
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next reply other threads:[~2020-01-20 10:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 10:07 Martin Kepplinger [this message]
2020-01-27 9:21 ` [PATCH] arm64: dts: librem5-devkit: add lsm9ds1 mount matrix Martin Kepplinger
2020-02-03 10:19 ` Martin Kepplinger
2020-02-03 11:05 ` Marco Felsch
2020-02-03 11:31 ` Martin Kepplinger
2020-02-04 17:24 ` Marco Felsch
2020-02-05 14:32 ` Martin Kepplinger
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