chipmisc: Add multi_pin capability

Add the ability to alias multiple output pins from a single pin alias.
This makes it possible to support some cases where a single logical
output is driven by multiple output pins.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/config/example-extras.cfg b/config/example-extras.cfg
index 19405262..34a55d89 100644
--- a/config/example-extras.cfg
+++ b/config/example-extras.cfg
@@ -169,6 +169,19 @@
 #    See the 'pwm_output' section for details on these parameters.
 
 
+# Multiple pin outputs (one may define any number of sections with a
+# "multi_pin" prefix). A multi_pin output creates an internal pin
+# alias that can modify multiple output pins each time the alias pin
+# is set. For example, one could define a "[multi_pin my_fan]" object
+# containing two pins and then set "pin=multi_pin:my_fan" in the
+# "[fan]" section - on each fan change both output pins would be
+# updated. These aliases may not be used with stepper motor pins.
+#[multi_pin my_multi_pin]
+#pins:
+#   A comma separated list of pins associated with this alias. This
+#   parameter must be provided.
+
+
 # Statically configured AD5206 digipots connected via SPI bus (one may
 # define any number of sections with an "ad5206" prefix).
 #[ad5206 my_digipot]