Module Name: src
Committed By: rkujawa
Date: Thu Jun 28 13:18:19 UTC 2018
Modified Files:
src/share/man/man4: tps65217pmic.4
Log Message:
Clarify caveats.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/share/man/man4/tps65217pmic.4
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man4/tps65217pmic.4
diff -u src/share/man/man4/tps65217pmic.4:1.8 src/share/man/man4/tps65217pmic.4:1.9
--- src/share/man/man4/tps65217pmic.4:1.8 Sun Oct 16 05:25:52 2016
+++ src/share/man/man4/tps65217pmic.4 Thu Jun 28 13:18:19 2018
@@ -1,4 +1,4 @@
-.\" $NetBSD: tps65217pmic.4,v 1.8 2016/10/16 05:25:52 wiz Exp $
+.\" $NetBSD: tps65217pmic.4,v 1.9 2018/06/28 13:18:19 rkujawa Exp $
.\"
.\" Copyright (c) 2013 The NetBSD Foundation, Inc.
.\" All rights reserved.
@@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd April 29, 2013
+.Dd June 28, 2018
.Dt TPS65217PMIC 4
.Os
.Sh NAME
@@ -81,10 +81,18 @@ White LED (backlight) support was added
.Sh CAVEATS
The driver can only report current voltage regulator settings.
It can not measure the real voltage, as the TPS65217 chip lacks hardware to do
-that.
+that. Some boards allow voltage measurement by connecting the power output to
+external sensor, or analog input of the MPU, but this is outside of the
+scope of this driver.
.Pp
Modifying voltage regulator parameters from user space was deliberately left
-unimplemented, as these parameters should only be set at the firmware level.
+unimplemented, as these parameters should only be set at the firmware or
+kernel level.
Setting wrong parameters may result in permanent hardware damage.
+.Pp
+The
+.Nm
+driver offers a function that can be used to change the voltage from other
+kernel components (currently used by AM335x support code).
.Sh BUGS
Battery and interrupt support is not implemented.
