-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
yaml --- r: 208812 b: refs/heads/master c: 0b019a4 h: refs/heads/master v: v3
- Loading branch information
Russell King
committed
Aug 10, 2010
1 parent
ca433f1
commit 18e8b81
Showing
2,831 changed files
with
217,527 additions
and
202,543 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,2 +1,2 @@ | ||
--- | ||
refs/heads/master: 054d5c9238f3c577ad51195c3ee7803613f322cc | ||
refs/heads/master: 0b019a41553a919965bb02d07d54e3e6c57a796d |
This file was deleted.
Oops, something went wrong.
21 changes: 21 additions & 0 deletions
21
trunk/Documentation/ABI/testing/sysfs-bus-i2c-devices-hm6352
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,21 @@ | ||
Where: /sys/bus/i2c/devices/.../heading0_input | ||
Date: April 2010 | ||
Kernel Version: 2.6.36? | ||
Contact: alan.cox@intel.com | ||
Description: Reports the current heading from the compass as a floating | ||
point value in degrees. | ||
|
||
Where: /sys/bus/i2c/devices/.../power_state | ||
Date: April 2010 | ||
Kernel Version: 2.6.36? | ||
Contact: alan.cox@intel.com | ||
Description: Sets the power state of the device. 0 sets the device into | ||
sleep mode, 1 wakes it up. | ||
|
||
Where: /sys/bus/i2c/devices/.../calibration | ||
Date: April 2010 | ||
Kernel Version: 2.6.36? | ||
Contact: alan.cox@intel.com | ||
Description: Sets the calibration on or off (1 = on, 0 = off). See the | ||
chip data sheet. | ||
|
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,31 @@ | ||
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input | ||
Date: June 2010 | ||
Contact: Christoph Mair <christoph.mair@gmail.com> | ||
Description: Start a pressure measurement and read the result. Values | ||
represent the ambient air pressure in pascal (0.01 millibar). | ||
|
||
Reading: returns the current air pressure. | ||
|
||
|
||
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input | ||
Date: June 2010 | ||
Contact: Christoph Mair <christoph.mair@gmail.com> | ||
Description: Measure the ambient temperature. The returned value represents | ||
the ambient temperature in units of 0.1 degree celsius. | ||
|
||
Reading: returns the current temperature. | ||
|
||
|
||
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling | ||
Date: June 2010 | ||
Contact: Christoph Mair <christoph.mair@gmail.com> | ||
Description: Tell the bmp085 to use more samples to calculate a pressure | ||
value. When writing to this file the chip will use 2^x samples | ||
to calculate the next pressure value with x being the value | ||
written. Using this feature will decrease RMS noise and | ||
increase the measurement time. | ||
|
||
Reading: returns the current oversampling setting. | ||
|
||
Writing: sets a new oversampling setting. | ||
Accepted values: 0..3. |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,11 +1,8 @@ | ||
00-INDEX | ||
- This file | ||
|
||
cachefeatures.txt | ||
- Supported cache features. | ||
|
||
Filesystems | ||
- Requirements for mounting the root file system. | ||
|
||
bfin-gpio-note.txt | ||
bfin-gpio-notes.txt | ||
- Notes in developing/using bfin-gpio driver. | ||
|
||
bfin-spi-notes.txt | ||
- Notes for using bfin spi bus driver. |
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,14 @@ | ||
SPI Chip Select behavior: | ||
|
||
With the Blackfin on-chip SPI peripheral, there is some logic tied to the CPHA | ||
bit whether the Slave Select Line is controlled by hardware (CPHA=0) or | ||
controlled by software (CPHA=1). However, the Linux SPI bus driver assumes that | ||
the Slave Select is always under software control and being asserted during | ||
the entire SPI transfer. - And not just bits_per_word duration. | ||
|
||
In most cases you can utilize SPI MODE_3 instead of MODE_0 to work-around this | ||
behavior. If your SPI slave device in question requires SPI MODE_0 or MODE_2 | ||
timing, you can utilize the GPIO controlled SPI Slave Select option instead. | ||
|
||
You can even use the same pin whose peripheral role is a SSEL, | ||
but use it as a GPIO instead. |
Oops, something went wrong.