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-Kernel driver max6650
-Supported chips:
- * Maxim MAX6650
- Prefix: 'max6650'
- Addresses scanned: none
- Datasheet:
- * Maxim MAX6651
- Prefix: 'max6651'
- Addresses scanned: none
- Datasheet:
- Hans J. Koch <>
- John Morris <>
- Claus Gindhart <>
-This driver implements support for the Maxim MAX6650 and MAX6651.
-The 2 devices are very similar, but the MAX6550 has a reduced feature
-set, e.g. only one fan-input, instead of 4 for the MAX6651.
-The driver is not able to distinguish between the 2 devices.
-The driver provides the following sensor accesses in sysfs:
-fan1_input ro fan tachometer speed in RPM
-fan2_input ro "
-fan3_input ro "
-fan4_input ro "
-fan1_target rw desired fan speed in RPM (closed loop mode only)
-pwm1_enable rw regulator mode, 0=full on, 1=open loop, 2=closed loop
-pwm1 rw relative speed (0-255), 255=max. speed.
- Used in open loop mode only.
-fan1_div rw sets the speed range the inputs can handle. Legal
- values are 1, 2, 4, and 8. Use lower values for
- faster fans.
-Usage notes
-This driver does not auto-detect devices. You will have to instantiate the
-devices explicitly. Please see Documentation/i2c/instantiating-devices for
-Module parameters
-If your board has a BIOS that initializes the MAX6650/6651 correctly, you can
-simply load your module without parameters. It won't touch the configuration
-registers then. If your board BIOS doesn't initialize the chip, or you want
-different settings, you can set the following parameters:
-voltage_12V: 5=5V fan, 12=12V fan, 0=don't change
-prescaler: Possible values are 1,2,4,8,16, or 0 for don't change
-clock: The clock frequency in Hz of the chip the driver should assume [254000]
-Please have a look at the MAX6650/6651 data sheet and make sure that you fully
-understand the meaning of these parameters before you attempt to change them.