diff options
| author | Akira Shimahara <akira215corp@gmail.com> | 2020-05-11 22:38:01 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-15 16:29:00 +0200 |
| commit | e2c94d6f572079511945e64537eb1218643f2e68 (patch) | |
| tree | c3a49f9816cb8d93a98888edc4e15cabd55451b4 /Documentation/ABI | |
| parent | 67b392f7b8edfa6f427fecd98722acab34c1c99f (diff) | |
w1_therm: adding alarm sysfs entry
Adding device alarms settings by a dedicated sysfs entry alarms (RW):
read or write TH and TL in the device RAM. Checking devices in alarm
state could be performed using the master search command.
As alarms temperature level are store in a 8 bit register on the device
and are signed values, a safe cast shall be performed using the min and
max temperature that device are able to measure. This is done by
int_to_short inline function.
A 'write_data' field is added in the device structure, to bind the
correct writing function, as some devices may have 2 or 3 bytes RAM.
Updating Documentation/ABI/testing/sysfs-driver-w1_therm accordingly.
Signed-off-by: Akira Shimahara <akira215corp@gmail.com>
Link: https://lore.kernel.org/r/20200511203801.411253-1-akira215corp@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-w1_therm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-w1_therm b/Documentation/ABI/testing/sysfs-driver-w1_therm index 6ffd3e3286a7..f2895205a515 100644 --- a/Documentation/ABI/testing/sysfs-driver-w1_therm +++ b/Documentation/ABI/testing/sysfs-driver-w1_therm @@ -1,3 +1,19 @@ +What: /sys/bus/w1/devices/.../alarms +Date: May 2020 +Contact: Akira Shimahara <akira215corp@gmail.com> +Description: + (RW) read or write TH and TL (Temperature High an Low) alarms. + Values shall be space separated and in the device range + (typical -55 degC to 125 degC), if not values will be trimmed + to device min/max capabilities. Values are integer as they are + stored in a 8bit register in the device. Lowest value is + automatically put to TL. Once set, alarms could be search at + master level, refer to Documentation/w1/w1_generic.rst for + detailed information +Users: any user space application which wants to communicate with + w1_term device + + What: /sys/bus/w1/devices/.../eeprom Date: May 2020 Contact: Akira Shimahara <akira215corp@gmail.com> |