7 Addresses scanned: none
8 Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
11 Hans J. Koch <hjk@hansjkoch.de>
12 John Morris <john.morris@spirentcom.com>
13 Claus Gindhart <claus.gindhart@kontron.com>
18 This driver implements support for the Maxim 6650/6651
20 The 2 devices are very similar, but the Maxim 6550 has a reduced feature
21 set, e.g. only one fan-input, instead of 4 for the 6651.
23 The driver is not able to distinguish between the 2 devices.
25 The driver provides the following sensor accesses in sysfs:
27 fan1_input ro fan tachometer speed in RPM
31 fan1_target rw desired fan speed in RPM (closed loop mode only)
32 pwm1_enable rw regulator mode, 0=full on, 1=open loop, 2=closed loop
33 pwm1 rw relative speed (0-255), 255=max. speed.
34 Used in open loop mode only.
35 fan1_div rw sets the speed range the inputs can handle. Legal
36 values are 1, 2, 4, and 8. Use lower values for
42 This driver does not auto-detect devices. You will have to instantiate the
43 devices explicitly. Please see Documentation/i2c/instantiating-devices for
49 If your board has a BIOS that initializes the MAX6650/6651 correctly, you can
50 simply load your module without parameters. It won't touch the configuration
51 registers then. If your board BIOS doesn't initialize the chip, or you want
52 different settings, you can set the following parameters:
54 voltage_12V: 5=5V fan, 12=12V fan, 0=don't change
55 prescaler: Possible values are 1,2,4,8,16, or 0 for don't change
56 clock: The clock frequency in Hz of the chip the driver should assume [254000]
58 Please have a look at the MAX6650/6651 data sheet and make sure that you fully
59 understand the meaning of these parameters before you attempt to change them.