[src/trunk]: src/sys/dev/i2c Mention where in the datasheet the compensation ...

[brad <brad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/83797ec4fbf7
branches:  trunk
changeset: 372420:83797ec4fbf7
user:      brad <brad%NetBSD.org@localhost>
date:      Thu Nov 24 21:07:05 2022 +0000

description:
Mention where in the datasheet the compensation algorithms came from.

diffstat:

 sys/dev/i2c/bmx280.c |  13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diffs (34 lines):

diff -r a9eb631d7156 -r 83797ec4fbf7 sys/dev/i2c/bmx280.c
--- a/sys/dev/i2c/bmx280.c      Thu Nov 24 21:03:38 2022 +0000
+++ b/sys/dev/i2c/bmx280.c      Thu Nov 24 21:07:05 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bmx280.c,v 1.3 2022/11/23 23:45:29 brad Exp $  */
+/*     $NetBSD: bmx280.c,v 1.4 2022/11/24 21:07:05 brad Exp $  */
 
 /*
  * Copyright (c) 2022 Brad Spencer <brad%anduin.eldar.org@localhost>
@@ -17,7 +17,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bmx280.c,v 1.3 2022/11/23 23:45:29 brad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bmx280.c,v 1.4 2022/11/24 21:07:05 brad Exp $");
 
 /*
   Driver for the Bosch BMP280/BME280 temperature, humidity (sometimes) and
@@ -643,8 +643,13 @@
        sc->sc_sme = NULL;
 }
 
-/* The conversion algorithms are taken from the Bosch datasheet for
- * the BMX280 and adapted to the envsys infrastructure.
+/* The conversion algorithms are taken from the BMP280 datasheet.  The
+ * same algorithms are used with the BME280.
+ *
+ * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf
+ *
+ * Section 3.11.3, page 21
+ *
  */
 
 static int32_t