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[src/trunk]: src/share/man/man4 ssdfb(4): nix BUGS section, add EXAMPLES section
details: https://anonhg.NetBSD.org/src/rev/33b4706579d5
branches: trunk
changeset: 984949:33b4706579d5
user: tnn <tnn%NetBSD.org@localhost>
date: Sun Aug 01 15:35:47 2021 +0000
description:
ssdfb(4): nix BUGS section, add EXAMPLES section
diffstat:
share/man/man4/ssdfb.4 | 26 ++++++++++++++++++++------
1 files changed, 20 insertions(+), 6 deletions(-)
diffs (51 lines):
diff -r 7b11760fdd82 -r 33b4706579d5 share/man/man4/ssdfb.4
--- a/share/man/man4/ssdfb.4 Sun Aug 01 15:29:29 2021 +0000
+++ b/share/man/man4/ssdfb.4 Sun Aug 01 15:35:47 2021 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: ssdfb.4,v 1.4 2019/11/02 14:47:35 tnn Exp $
+.\" $NetBSD: ssdfb.4,v 1.5 2021/08/01 15:35:47 tnn Exp $
.\"
.\" Copyright (c) 2019 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 November 2, 2019
+.Dd August 1, 2021
.Dt SSDFB 4
.Os
.Sh NAME
@@ -90,6 +90,24 @@
.Em 0x400 :
forcibly attach as console
.El
+.Pp
+On most displays, the contrast setting can be adjusted with the
+.Xr wsconsctl 8
+program.
+.Sh EXAMPLES
+To attach an SSD1322 display using the 4-wire SPI interface on an
+Allwinner A20 ARM single board computer, the following Device Tree overlay
+can be used:
+.Bd -literal -offset indent
+&spi0 {
+ ssdfb@0 {
+ compatible = "solomon,ssd1322";
+ reg = <0x00>;
+ dc-gpio = <0x10 0x07 0x02 0x00>;
+ status = "okay";
+ };
+};
+.Ed
.Sh SEE ALSO
.Xr iic 4 ,
.Xr wsdisplay 4
@@ -113,7 +131,3 @@
driver written by
.An Patrick Wildt Aq Mt patrick%blueri.se@localhost
but does not share any code.
-.Sh BUGS
-The "4-wire SPI" MCU interface which requires an auxiliary
-.Xr gpio 4
-pin for the D/C# signal is currently not supported.
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