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author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-17 12:46:29 +0300 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2019-04-17 20:37:23 +0300 |
commit | 7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7 (patch) | |
tree | 9db30159bd32bec125c7d49e80a79bb7c4da0c8e /Documentation/hwmon/smsc47b397 | |
parent | b04f2f7d387b3160883c2a1f5e2285483a791e82 (diff) | |
download | linux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.tar.xz |
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/smsc47b397')
-rw-r--r-- | Documentation/hwmon/smsc47b397 | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/Documentation/hwmon/smsc47b397 b/Documentation/hwmon/smsc47b397 deleted file mode 100644 index 600194cf1804..000000000000 --- a/Documentation/hwmon/smsc47b397 +++ /dev/null @@ -1,197 +0,0 @@ -Kernel driver smsc47b397 -======================== - -Supported chips: - - * SMSC LPC47B397-NC - - * SMSC SCH5307-NS - - * SMSC SCH5317 - - Prefix: 'smsc47b397' - - Addresses scanned: none, address read from Super I/O config space - - Datasheet: In this file - -Authors: - - - Mark M. Hoffman <mhoffman@lightlink.com> - - Utilitek Systems, Inc. - -November 23, 2004 - -The following specification describes the SMSC LPC47B397-NC [1]_ sensor chip -(for which there is no public datasheet available). This document was -provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected -by Mark M. Hoffman <mhoffman@lightlink.com>. - -.. [1] And SMSC SCH5307-NS and SCH5317, which have different device IDs but are - otherwise compatible. - -------------------------------------------------------------------------- - -Methods for detecting the HP SIO and reading the thermal data on a dc7100 -------------------------------------------------------------------------- - -The thermal information on the dc7100 is contained in the SIO Hardware Monitor -(HWM). The information is accessed through an index/data pair. The index/data -pair is located at the HWM Base Address + 0 and the HWM Base Address + 1. The -HWM Base address can be obtained from Logical Device 8, registers 0x60 (MSB) -and 0x61 (LSB). Currently we are using 0x480 for the HWM Base Address and -0x480 and 0x481 for the index/data pair. - -Reading temperature information. -The temperature information is located in the following registers: - -=============== ======= ======================================================= -Temp1 0x25 (Currently, this reflects the CPU temp on all systems). -Temp2 0x26 -Temp3 0x27 -Temp4 0x80 -=============== ======= ======================================================= - -Programming Example -The following is an example of how to read the HWM temperature registers:: - - MOV DX,480H - MOV AX,25H - OUT DX,AL - MOV DX,481H - IN AL,DX - -AL contains the data in hex, the temperature in Celsius is the decimal -equivalent. - -Ex: If AL contains 0x2A, the temperature is 42 degrees C. - -Reading tach information. -The fan speed information is located in the following registers: - -=============== ======= ======= ================================= - LSB MSB -Tach1 0x28 0x29 (Currently, this reflects the CPU - fan speed on all systems). -Tach2 0x2A 0x2B -Tach3 0x2C 0x2D -Tach4 0x2E 0x2F -=============== ======= ======= ================================= - -.. Important:: - - Reading the tach LSB locks the tach MSB. - The LSB Must be read first. - -How to convert the tach reading to RPM --------------------------------------- - -The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB) -The SIO counts the number of 90kHz (11.111us) pulses per revolution. -RPM = 60/(TCount * 11.111us) - -Example:: - - Reg 0x28 = 0x9B - Reg 0x29 = 0x08 - -TCount = 0x89B = 2203 - -RPM = 60 / (2203 * 11.11111 E-6) = 2451 RPM - -Obtaining the SIO version. - -Configuration Sequence ----------------------- - -To program the configuration registers, the following sequence must be followed: -1. Enter Configuration Mode -2. Configure the Configuration Registers -3. Exit Configuration Mode. - -Enter Configuration Mode -^^^^^^^^^^^^^^^^^^^^^^^^ - -To place the chip into the Configuration State The config key (0x55) is written -to the CONFIG PORT (0x2E). - -Configuration Mode -^^^^^^^^^^^^^^^^^^ - -In configuration mode, the INDEX PORT is located at the CONFIG PORT address and -the DATA PORT is at INDEX PORT address + 1. - -The desired configuration registers are accessed in two steps: - -a. Write the index of the Logical Device Number Configuration Register - (i.e., 0x07) to the INDEX PORT and then write the number of the - desired logical device to the DATA PORT. - -b. Write the address of the desired configuration register within the - logical device to the INDEX PORT and then write or read the config- - uration register through the DATA PORT. - -Note: - If accessing the Global Configuration Registers, step (a) is not required. - -Exit Configuration Mode -^^^^^^^^^^^^^^^^^^^^^^^ - -To exit the Configuration State the write 0xAA to the CONFIG PORT (0x2E). -The chip returns to the RUN State. (This is important). - -Programming Example -^^^^^^^^^^^^^^^^^^^ - -The following is an example of how to read the SIO Device ID located at 0x20: - - ; ENTER CONFIGURATION MODE - MOV DX,02EH - MOV AX,055H - OUT DX,AL - ; GLOBAL CONFIGURATION REGISTER - MOV DX,02EH - MOV AL,20H - OUT DX,AL - ; READ THE DATA - MOV DX,02FH - IN AL,DX - ; EXIT CONFIGURATION MODE - MOV DX,02EH - MOV AX,0AAH - OUT DX,AL - -The registers of interest for identifying the SIO on the dc7100 are Device ID -(0x20) and Device Rev (0x21). - -The Device ID will read 0x6F (0x81 for SCH5307-NS, and 0x85 for SCH5317) -The Device Rev currently reads 0x01 - -Obtaining the HWM Base Address ------------------------------- - -The following is an example of how to read the HWM Base Address located in -Logical Device 8:: - - ; ENTER CONFIGURATION MODE - MOV DX,02EH - MOV AX,055H - OUT DX,AL - ; CONFIGURE REGISTER CRE0, - ; LOGICAL DEVICE 8 - MOV DX,02EH - MOV AL,07H - OUT DX,AL ;Point to LD# Config Reg - MOV DX,02FH - MOV AL, 08H - OUT DX,AL;Point to Logical Device 8 - ; - MOV DX,02EH - MOV AL,60H - OUT DX,AL ; Point to HWM Base Addr MSB - MOV DX,02FH - IN AL,DX ; Get MSB of HWM Base Addr - ; EXIT CONFIGURATION MODE - MOV DX,02EH - MOV AX,0AAH - OUT DX,AL |