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Based on kernel version 3.9. Page generated on 2013-05-02 23:07 EST.

1	Kernel driver max6650
2	=====================
3	
4	Supported chips:
5	  * Maxim MAX6650
6	    Prefix: 'max6650'
7	    Addresses scanned: none
8	    Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
9	  * Maxim MAX6651
10	    Prefix: 'max6651'
11	    Addresses scanned: none
12	    Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
13	
14	Authors:
15	    Hans J. Koch <hjk@hansjkoch.de>
16	    John Morris <john.morris@spirentcom.com>
17	    Claus Gindhart <claus.gindhart@kontron.com>
18	
19	Description
20	-----------
21	
22	This driver implements support for the Maxim MAX6650 and MAX6651.
23	
24	The 2 devices are very similar, but the MAX6550 has a reduced feature
25	set, e.g. only one fan-input, instead of 4 for the MAX6651.
26	
27	The driver is not able to distinguish between the 2 devices.
28	
29	The driver provides the following sensor accesses in sysfs:
30	
31	fan1_input	ro	fan tachometer speed in RPM
32	fan2_input	ro	"
33	fan3_input	ro	"
34	fan4_input	ro	"
35	fan1_target	rw	desired fan speed in RPM (closed loop mode only)
36	pwm1_enable	rw	regulator mode, 0=full on, 1=open loop, 2=closed loop
37	pwm1		rw	relative speed (0-255), 255=max. speed.
38				Used in open loop mode only.
39	fan1_div	rw	sets the speed range the inputs can handle. Legal
40				values are 1, 2, 4, and 8. Use lower values for
41				faster fans.
42	
43	Usage notes
44	-----------
45	
46	This driver does not auto-detect devices. You will have to instantiate the
47	devices explicitly. Please see Documentation/i2c/instantiating-devices for
48	details.
49	
50	Module parameters
51	-----------------
52	
53	If your board has a BIOS that initializes the MAX6650/6651 correctly, you can
54	simply load your module without parameters. It won't touch the configuration
55	registers then. If your board BIOS doesn't initialize the chip, or you want
56	different settings, you can set the following parameters:
57	
58	voltage_12V: 5=5V fan, 12=12V fan, 0=don't change
59	prescaler: Possible values are 1,2,4,8,16, or 0 for don't change
60	clock: The clock frequency in Hz of the chip the driver should assume [254000]
61	
62	Please have a look at the MAX6650/6651 data sheet and make sure that you fully
63	understand the meaning of these parameters before you attempt to change them.
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