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Diffstat (limited to 'Documentation/spi/spi-lm70llp.rst')
| -rw-r--r-- | Documentation/spi/spi-lm70llp.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/spi/spi-lm70llp.rst b/Documentation/spi/spi-lm70llp.rst index 07631aef4343..2f20e5b405e6 100644 --- a/Documentation/spi/spi-lm70llp.rst +++ b/Documentation/spi/spi-lm70llp.rst @@ -57,7 +57,7 @@ devices might share the same SI/SO pin. The bitbanger routine in this driver (lm70_txrx) is called back from the bound "hwmon/lm70" protocol driver through its sysfs hook, using a spi_write_then_read() call. It performs Mode 0 (SPI/Microwire) bitbanging. -The lm70 driver then inteprets the resulting digital temperature value +The lm70 driver then interprets the resulting digital temperature value and exports it through sysfs. A "gotcha": National Semiconductor's LM70 LLP eval board circuit schematic @@ -69,7 +69,7 @@ Interpreting this circuit, when the LM70 SI/O line is High (or tristate and not grounded by the host via D7), the transistor conducts and switches the collector to zero, which is reflected on pin 13 of the DB25 parport connector. When SI/O is Low (driven by the LM70 or the host) on the other -hand, the transistor is cut off and the voltage tied to it's collector is +hand, the transistor is cut off and the voltage tied to its collector is reflected on pin 13 as a High level. So: the getmiso inline routine in this driver takes this fact into account, |