hwmon: (sht15) add support for CRC validation

The sht15 sensor allows validating exchanges to and from the device
using a crc8 function. An utility function to reverse a byte has also
been added.

Signed-off-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sht15.h b/include/linux/sht15.h
index d836ca617323..f85c7c523da0 100644
--- a/include/linux/sht15.h
+++ b/include/linux/sht15.h
@@ -19,6 +19,7 @@
  * @gpio_sck:           no. of gpio to which the data clock is connected.
  * @supply_mv:          supply voltage in mv. Overridden by regulator if
  *                      available.
+ * @checksum:           flag to indicate the checksum should be validated.
  * @no_otp_reload:      flag to indicate no reload from OTP.
  * @low_resolution:     flag to indicate the temp/humidity resolution to use.
  */
@@ -26,6 +27,7 @@ struct sht15_platform_data {
         int gpio_data;
         int gpio_sck;
         int supply_mv;
+        bool checksum;
         bool no_otp_reload;
         bool low_resolution;
 };