55 lines
2.4 KiB
Plaintext
55 lines
2.4 KiB
Plaintext
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* AKM 8963/8975/09911 compass sensor
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nvi_ (NVI = NVidia/Invensense) drivers use the NVidia Sensor (NVS) framework.
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See the nvs.txt documentation for NVS DT capabilities.
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The nvi_ak89xx compass sensor driver supports the AK8963, AK8975, and
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AK09911 devices as stand-alone or behind an Invensense MPU.
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Required properties:
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- compatible: Device or generic name.
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Supported device names:
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- ak,ak89xx
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- ak,ak8963
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- ak,ak8975
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- ak,ak09911
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Note: If the part is known and is populated, then it can be specified:
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Example: compatible = "ak,ak8963";
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When specifying a device this way, the driver will assume this specific
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device is populated during system boot and will not verify its
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existence. If, however, the device is unknown or may not be populated,
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then the label, ak89xx, (Example: compatible = "ak,ak89xx";),
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must be used. This tells the driver to find which device is used. If
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the device is not found, the driver will unload itself. This requires
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regulators to be setup correctly for the probe function.
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- reg: i2c address of the device. It should be 0x0C or 0x0D.
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Note: the AKM09911 also supports I2C addresses 0x0E and 0x0F.
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Optional properties:
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- status: set to "ok" or "okay" for normal operation. Set to anything else
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to unload the driver without ever communicating with the device.
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Note: The "anything else" above is typically "disabled".
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Since the driver will unload without communicating with the device, the
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device will be left in its POR state.
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- magnetic_field_disable: Setting this property to <1> will disable the device
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and unload the driver.
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- vdd-supply: regulator supply for the chip
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- vid-supply: regulator supply for the chip
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Note: These are required if the driver is to control the regulators.
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- magnetic_field_matrix: Orientation matrix for this device.
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- nvi_config: This configures the device's I2C connection.
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The string options are: auto
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mpu
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host
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auto = the driver will auto detect the connection.
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mpu = the device is connected to an Invensense auxilary bus.
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host = the device is connected to the host AP.
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If this property is not defined, auto will be used.
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Example:
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ak89xx@0d {
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compatible = "ak,ak89xx";
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reg = <0x0d>;
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orientation = [ff 00 00 00 ff 00 00 00 01];
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};
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