summaryrefslogtreecommitdiff
path: root/include/dt-bindings
diff options
context:
space:
mode:
authorPeter Rosin <peda@axentia.se>2017-05-14 21:51:05 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-03 19:25:40 +0900
commit256ac0375098e50d59c415fcbb561f2927fa8780 (patch)
tree914131a19de728bb8e14ef039a8589b6c67480da /include/dt-bindings
parentb594b10144f631130110b424d9d5e4f152f14e0c (diff)
dt-bindings: document devicetree bindings for mux-controllers and gpio-mux
Allow specifying that a single multiplexer controller can be used to control several parallel multiplexers, thus enabling sharing of the multiplexer controller by different consumers. Add a binding for a first mux controller in the form of a GPIO based mux controller. Acked-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/dt-bindings')
-rw-r--r--include/dt-bindings/mux/mux.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/dt-bindings/mux/mux.h b/include/dt-bindings/mux/mux.h
new file mode 100644
index 000000000000..c8e855c4a609
--- /dev/null
+++ b/include/dt-bindings/mux/mux.h
@@ -0,0 +1,16 @@
+/*
+ * This header provides constants for most Multiplexer bindings.
+ *
+ * Most Multiplexer bindings specify an idle state. In most cases, the
+ * the multiplexer can be left as is when idle, and in some cases it can
+ * disconnect the input/output and leave the multiplexer in a high
+ * impedance state.
+ */
+
+#ifndef _DT_BINDINGS_MUX_MUX_H
+#define _DT_BINDINGS_MUX_MUX_H
+
+#define MUX_IDLE_AS_IS (-1)
+#define MUX_IDLE_DISCONNECT (-2)
+
+#endif