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Add support for the tc654 and tc655 fan controllers from Microchip. http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Acked-by: Rob Herring <robh@kernel.org> [groeck: Fixed continuation line alignments] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
32 lines
1.0 KiB
Plaintext
32 lines
1.0 KiB
Plaintext
Kernel driver tc654
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===================
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Supported chips:
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* Microship TC654 and TC655
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Prefix: 'tc654'
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Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf
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Authors:
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Chris Packham <chris.packham@alliedtelesis.co.nz>
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Masahiko Iwamoto <iwamoto@allied-telesis.co.jp>
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Description
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-----------
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This driver implements support for the Microchip TC654 and TC655.
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The TC654 uses the 2-wire interface compatible with the SMBUS 2.0
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specification. The TC654 has two (2) inputs for measuring fan RPM and
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one (1) PWM output which can be used for fan control.
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Configuration Notes
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-------------------
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Ordinarily the pwm1_mode ABI is used for controlling the pwm output
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mode. However, for this chip the output is always pwm, and the
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pwm1_mode determines if the pwm output is controlled via the pwm1 value
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or via the Vin analog input.
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Setting pwm1_mode to 1 will cause the pwm output to be driven based on
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the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be
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driven based on the Vin input.
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