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author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-17 06:46:29 -0300 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2019-04-17 10:37:23 -0700 |
commit | 7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7 (patch) | |
tree | 9db30159bd32bec125c7d49e80a79bb7c4da0c8e /Documentation/hwmon/max6650.rst | |
parent | b04f2f7d387b3160883c2a1f5e2285483a791e82 (diff) | |
download | linux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.tar.bz2 |
docs: hwmon: Add an index file and rename docs to *.rst
Now that all files were converted to ReST format, rename them
and add an index.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/max6650.rst')
-rw-r--r-- | Documentation/hwmon/max6650.rst | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Documentation/hwmon/max6650.rst b/Documentation/hwmon/max6650.rst new file mode 100644 index 000000000000..253482add082 --- /dev/null +++ b/Documentation/hwmon/max6650.rst @@ -0,0 +1,74 @@ +Kernel driver max6650 +===================== + +Supported chips: + + * Maxim MAX6650 + + Prefix: 'max6650' + + Addresses scanned: none + + Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf + + * Maxim MAX6651 + + Prefix: 'max6651' + + Addresses scanned: none + + Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf + +Authors: + - Hans J. Koch <hjk@hansjkoch.de> + - John Morris <john.morris@spirentcom.com> + - Claus Gindhart <claus.gindhart@kontron.com> + +Description +----------- + +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 + 3=off +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 +details. + +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. |