10 Addresses scanned: none
12 Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
18 Addresses scanned: none
20 Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
23 - Hans J. Koch <hjk@hansjkoch.de>
24 - John Morris <john.morris@spirentcom.com>
25 - Claus Gindhart <claus.gindhart@kontron.com>
30 This driver implements support for the Maxim MAX6650 and MAX6651.
32 The 2 devices are very similar, but the MAX6550 has a reduced feature
33 set, e.g. only one fan-input, instead of 4 for the MAX6651.
35 The driver is not able to distinguish between the 2 devices.
37 The driver provides the following sensor accesses in sysfs:
39 =============== ======= =======================================================
40 fan1_input ro fan tachometer speed in RPM
44 fan1_target rw desired fan speed in RPM (closed loop mode only)
45 pwm1_enable rw regulator mode, 0=full on, 1=open loop, 2=closed loop
47 pwm1 rw relative speed (0-255), 255=max. speed.
48 Used in open loop mode only.
49 fan1_div rw sets the speed range the inputs can handle. Legal
50 values are 1, 2, 4, and 8. Use lower values for
52 =============== ======= =======================================================
57 This driver does not auto-detect devices. You will have to instantiate the
58 devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
64 If your board has a BIOS that initializes the MAX6650/6651 correctly, you can
65 simply load your module without parameters. It won't touch the configuration
66 registers then. If your board BIOS doesn't initialize the chip, or you want
67 different settings, you can set the following parameters:
69 voltage_12V: 5=5V fan, 12=12V fan, 0=don't change
70 prescaler: Possible values are 1,2,4,8,16, or 0 for don't change
71 clock: The clock frequency in Hz of the chip the driver should assume [254000]
73 Please have a look at the MAX6650/6651 data sheet and make sure that you fully
74 understand the meaning of these parameters before you attempt to change them.