[lm-sensors] "Dummy" sensor driver?

[lm-sensors] "Dummy" sensor driver?

[Ian Pilcher]

I'm currently working on a libsensors-based program, and I'd like to
continue that work in my spare moments while I travel.  Unfortunately,
my laptop is a Lenovo T61, which has no sensors recognized by
lm_sensors (at least not on RHEL 5).

Is there any such thing as a "dummy" sensor driver that can give my
program something to chew on?  I'm not at a state yet where I need
meaningful data.

Thanks!

-- 
====================================
Ian Pilcher                                         arequipeno@gmail.com
====================================


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Re: [lm-sensors] "Dummy" sensor driver?

[Jean Delvare]

Hi Ian,

On Mon, 12 Oct 2009 14:45:49 -0500, Ian Pilcher wrote:
> I'm currently working on a libsensors-based program, and I'd like to
> continue that work in my spare moments while I travel.  Unfortunately,
> my laptop is a Lenovo T61, which has no sensors recognized by
> lm_sensors (at least not on RHEL 5).
> 
> Is there any such thing as a "dummy" sensor driver that can give my
> program something to chew on?  I'm not at a state yet where I need
> meaningful data.

We have a dummy i2c adapter driver, named i2c-stub (written by Mark M.
Hoffman originally.) You can emulate up to 10 chips on it, supporting
the basic SMBus transactions most I2C-based hwmon devices use. So, if
you have a register dump from such a device, you can emulate it on any
machine. I do that all the times when working on hwmon drivers for
hardware I don't have.

For example this works very well with the lm90 driver. If you want
dumps from lm90-compatible chips, just let me know and I'll send them
to you. This should also works reasonably well with most National
Semiconductor and Analog Device chips. Just Winbond chips don't work
well because they use banks and i2c-stub doesn't have support for that.

I wrote a helper script, which is in recent versions of the i2c-tools
package, to load dumps to i2c-stub automatically (named
i2c-stub-from-dump).

-- 
Jean Delvare
http://khali.linux-fr.org/wishlist.html

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Re: [lm-sensors] "Dummy" sensor driver?

[Ian Pilcher]

On 10/12/2009 03:52 PM, Jean Delvare wrote:
> We have a dummy i2c adapter driver, named i2c-stub (written by Mark M.
> Hoffman originally.) You can emulate up to 10 chips on it, supporting
> the basic SMBus transactions most I2C-based hwmon devices use. So, if
> you have a register dump from such a device, you can emulate it on any
> machine. I do that all the times when working on hwmon drivers for
> hardware I don't have.

Perfect!

> For example this works very well with the lm90 driver. If you want
> dumps from lm90-compatible chips, just let me know and I'll send them
> to you. This should also works reasonably well with most National
> Semiconductor and Analog Device chips. Just Winbond chips don't work
> well because they use banks and i2c-stub doesn't have support for that.

Please do send them.  My desktop system has a Winbond chip, so a dump
from it presumably wouldn't do any good.

> I wrote a helper script, which is in recent versions of the i2c-tools
> package, to load dumps to i2c-stub automatically (named
> i2c-stub-from-dump).

Thanks!

-- 
====================================
Ian Pilcher                                         arequipeno@gmail.com
====================================

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Re: [lm-sensors] "Dummy" sensor driver?

[Jean Delvare]

[-- Attachment #1: Type: text/plain, Size: 1083 bytes --]

Good morning Ian,

On Mon, 12 Oct 2009 16:43:25 -0500, Ian Pilcher wrote:
> On 10/12/2009 03:52 PM, Jean Delvare wrote:
> > For example this works very well with the lm90 driver. If you want
> > dumps from lm90-compatible chips, just let me know and I'll send them
> > to you. This should also works reasonably well with most National
> > Semiconductor and Analog Device chips. Just Winbond chips don't work
> > well because they use banks and i2c-stub doesn't have support for that.
> 
> Please do send them.  My desktop system has a Winbond chip, so a dump
> from it presumably wouldn't do any good.

Please find attached:
* A dump of an ADM1025 chip, to be used with the adm1025 hwmon driver.
  Emulate at I2C address 0x2c, 0x2d or 0x2e.
* A dump of an ADM1032 chip, to be used with the lm90 hwmon driver.
  Emulate at I2C address 0x4c.
* A dump of an EMC6D102 chip, to be used with the lm85 hwmon driver.
  Emulate at I2C address 0x2c, 0x2d or 0x2e.

I have dumps of many other chips if you need to test a specific case.

-- 
Jean Delvare
http://khali.linux-fr.org/wishlist.html

[-- Attachment #2: adm1025.dump --]
[-- Type: text/plain, Size: 2112 bytes --]

After modprobe i2c-dev

No size specified (using byte-data access)
  WARNING! This program can confuse your I2C bus, cause data loss and worse!
  I will probe file /dev/i2c-0, address 0x2d, mode byte
  You have five seconds to reconsider and press CTRL-C!

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
10: 5b 5b 5b 5b 5b 00 5b 5b 5b 5b 5b 5b 5b 5b 5b 00    [[[[[.[[[[[[[[[.
20: c0 7d c6 c1 c2 c6 23 21 5b 5b 5b d3 ad 84 78 d3    ?}????#![[[???x?
30: ad d3 ad d3 ad d3 ad 3c 0a 2d 0a 5b 5b 5b 41 29    ???????<?-?[[[A)
40: 09 00 00 5b 5b 5b 5b 0c 5b 80 5b 5b 5b 5b 5b 5b    ?..[[[[?[?[[[[[[
50: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
60: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
70: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
80: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
90: 5b 5b 5b 5b 5b 00 5b 5b 5b 5b 5b 5b 5b 5b 5b 00    [[[[[.[[[[[[[[[.
a0: c0 7d c6 c1 c2 c6 23 21 5b 5b 5b d3 ad 84 78 d3    ?}????#![[[???x?
b0: ad d3 ad d3 ad d3 ad 3c 0a 2d 0a 5b 5b 5b 41 29    ???????<?-?[[[A)
c0: 09 00 00 5b 5b 5b 5b 0c 5b 80 5b 5b 5b 5b 5b 5b    ?..[[[[?[?[[[[[[
d0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
e0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[
f0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b    [[[[[[[[[[[[[[[[


---------------------------------------------
Output from sensors command line
(using changed sensors.conf)

adm1025-i2c-0-2d
Adapter: SMBus I801 adapter at efa0
+2.5V:     +2.50 V  (min =  +2.25 V, max =  +2.75 V)   
VCore:     +1.48 V  (min =  +1.41 V, max =  +1.55 V)   
+3.3V:     +3.40 V  (min =  +2.97 V, max =  +3.63 V)   
+5V:       +5.03 V  (min =  +4.50 V, max =  +5.50 V)   
+12V:     +12.19 V  (min = +10.81 V, max = +13.19 V)   
VCC:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)   
CPU Temp:  +39.0 C  (low  =   +10 C, high =   +60 C)   
M/B Temp:  +38.0 C  (low  =   +10 C, high =   +45 C)   
vid:      +1.475 V

[-- Attachment #3: adm1032.dump --]
[-- Type: text/plain, Size: 1224 bytes --]

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 18 19 80 00 08 55 00 55 00 00 08 55 00 55 00 00    ???.?U.U..?U.U..
10: 00 00 00 00 00 80 80 00 00 55 00 00 00 00 00 00    .....??..U......
20: 55 0a 01 00 00 00 00 00 00 e3 00 00 00 00 00 00    U??......?......
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41 42    ..............AB

[-- Attachment #4: emc6d102.dump --]
[-- Type: text/plain, Size: 1224 bytes --]

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
20: 71 80 c4 c4 c2 1b 19 1c a4 07 ff ff 1b 09 ab 07    q?????????..????
30: ff ff ff 00 00 00 00 00 00 00 00 00 00 00 5c 65    ..............\e
40: 05 00 00 0d 6d 79 7c 89 b6 ca b6 ca b6 ca 0a 37    ?..?my|????????7
50: 0a 2d 0a 2d 8c 0a ff ff ff ff ff ff 62 62 62 c0    ?-?-??......bbb?
60: 70 70 20 00 80 80 4d 1f 23 23 3f 2d 2d 44 40 00    pp .??M?##?--D@.
70: ff ff ff 09 09 09 09 09 09 00 30 00 40 00 ec 18    ...??????.0.@.??
80: 1e a4 0e 00 00 3b 50 44 58 00 4d 4d 09 09 0a 00    ???..;PDX.MM???.
90: 04 04 04 04 0c 0c 0c 5a f1 00 00 00 00 00 00 00    ???????Z?.......
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 12    ...............?

[-- Attachment #5: Type: text/plain, Size: 153 bytes --]

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