1*4882a593SmuzhiyunKernel driver tmp108 2*4882a593Smuzhiyun==================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun * Texas Instruments TMP108 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun Prefix: 'tmp108' 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun Addresses scanned: none 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun Datasheet: https://www.ti.com/product/tmp108 13*4882a593Smuzhiyun 14*4882a593SmuzhiyunAuthor: 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun John Muir <john@jmuir.com> 17*4882a593Smuzhiyun 18*4882a593SmuzhiyunDescription 19*4882a593Smuzhiyun----------- 20*4882a593Smuzhiyun 21*4882a593SmuzhiyunThe Texas Instruments TMP108 implements one temperature sensor. An alert pin 22*4882a593Smuzhiyuncan be set when temperatures exceed minimum or maximum values plus or minus a 23*4882a593Smuzhiyunhysteresis value. (This driver does not support interrupts for the alert pin, 24*4882a593Smuzhiyunand the device runs in comparator mode.) 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunThe sensor is accurate to 0.75C over the range of -25 to +85 C, and to 1.0 27*4882a593Smuzhiyundegree from -40 to +125 C. Resolution of the sensor is 0.0625 degree. The 28*4882a593Smuzhiyunoperating temperature has a minimum of -55 C and a maximum of +150 C. 29*4882a593SmuzhiyunHysteresis values can be set to 0, 1, 2, or 4C. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunThe TMP108 has a programmable update rate that can select between 8, 4, 1, and 32*4882a593Smuzhiyun0.5 Hz. 33*4882a593Smuzhiyun 34*4882a593SmuzhiyunBy default the TMP108 reads the temperature continuously. To conserve power, 35*4882a593Smuzhiyunthe TMP108 has a one-shot mode where the device is normally shut-down. When a 36*4882a593Smuzhiyunone shot is requested the temperature is read, the result can be retrieved, 37*4882a593Smuzhiyunand then the device is shut down automatically. (This driver only supports 38*4882a593Smuzhiyuncontinuous mode.) 39*4882a593Smuzhiyun 40*4882a593SmuzhiyunThe driver provides the common sysfs-interface for temperatures (see 41*4882a593SmuzhiyunDocumentation/hwmon/sysfs-interface.rst under Temperatures). 42