w1: ds2438: adding support for reading page1

[linux-2.6-block.git] / Documentation / w1 / slaves / w1_ds2438.rst

diff --git a/Documentation/w1/slaves/w1_ds2438.rst b/Documentation/w1/slaves/w1_ds2438.rst
index a29309a3f8e579aa3f8c5289174db88e99c75568..ac8d0d4b0d0e5a80c812c29356f3806c17e679ab 100644 (file)
--- a/Documentation/w1/slaves/w1_ds2438.rst
+++ b/Documentation/w1/slaves/w1_ds2438.rst
@@ -44,6 +44,14 @@ Internally when this file is read, the additional CRC byte is also obtained
 from the slave device. If it is correct, the 8 bytes page data are passed
 to userspace, otherwise an I/O error is returned.
 
+"page1"
+-------
+This file provides full 8 bytes of the chip Page 1 (01h).
+This page contains the ICA, elapsed time meter and current offset data of the DS2438.
+Internally when this file is read, the additional CRC byte is also obtained
+from the slave device. If it is correct, the 8 bytes page data are passed
+to userspace, otherwise an I/O error is returned.
+
 "temperature"
 -------------
 Opening and reading this file initiates the CONVERT_T (temperature conversion)