Information: https://www.ti.com/product/tmp122
+ * Texas Instruments TMP125
+
+ Information: https://www.ti.com/product/tmp125
+
* National Semiconductor LM71
Datasheet: https://www.ti.com/product/LM71
The TMP122/TMP124 also feature configurable temperature thresholds.
+The TMP125 is less accurate and provides 10-bit temperature data
+with 0.25 degrees Celsius resolution.
+
The LM71 is also very similar; main difference is 14-bit temperature
data (0.03125 degrees celsius resolution).
depends on SPI_MASTER
help
If you say yes here you get support for the National Semiconductor
- LM70, LM71, LM74 and Texas Instruments TMP121/TMP123 digital tempera-
- ture sensor chips.
+ LM70, LM71, LM74 and Texas Instruments TMP121/TMP123, TMP122/TMP124,
+ TMP125 digital temperature sensor chips.
This driver can also be built as a module. If so, the module
will be called lm70.
#define LM70_CHIP_LM71 2 /* NS LM71 */
#define LM70_CHIP_LM74 3 /* NS LM74 */
#define LM70_CHIP_TMP122 4 /* TI TMP122/TMP124 */
+#define LM70_CHIP_TMP125 5 /* TI TMP125 */
struct lm70 {
struct spi_device *spi;
* LM71:
* 14 bits of 2's complement data, discard LSB 2 bits,
* resolution 0.0312 degrees celsius.
+ *
+ * TMP125:
+ * MSB/D15 is a leading zero. D14 is the sign-bit. This is
+ * followed by 9 temperature bits (D13..D5) in 2's complement
+ * data format with a resolution of 0.25 degrees celsius per unit.
+ * LSB 5 bits (D4..D0) share the same value as D5 and get discarded.
*/
switch (p_lm70->chip) {
case LM70_CHIP_LM70:
case LM70_CHIP_LM71:
val = ((int)raw / 4) * 3125 / 100;
break;
+
+ case LM70_CHIP_TMP125:
+ val = (sign_extend32(raw, 14) / 32) * 250;
+ break;
}
status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */
.compatible = "ti,tmp122",
.data = (void *) LM70_CHIP_TMP122,
},
+ {
+ .compatible = "ti,tmp125",
+ .data = (void *) LM70_CHIP_TMP125,
+ },
{
.compatible = "ti,lm71",
.data = (void *) LM70_CHIP_LM71,
{ "lm70", LM70_CHIP_LM70 },
{ "tmp121", LM70_CHIP_TMP121 },
{ "tmp122", LM70_CHIP_TMP122 },
+ { "tmp125", LM70_CHIP_TMP125 },
{ "lm71", LM70_CHIP_LM71 },
{ "lm74", LM70_CHIP_LM74 },
{ },