1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0474-gpio-ir-overlay-add-parameter-to-configure-signal-po.patch b/target/linux/bcm27xx/patches-5.4/950-0474-gpio-ir-overlay-add-parameter-to-configure-signal-po.patch
new file mode 100644
index 0000000000..cdd14f7940
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0474-gpio-ir-overlay-add-parameter-to-configure-signal-po.patch
@@ -0,0 +1,45 @@
+From e253d03936265dc4ab8ae9ae89d2a885e80a45a6 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Fri, 6 Mar 2020 11:08:10 +0100
+Subject: [PATCH] gpio-ir-overlay: add parameter to configure signal
+ polarity (#3490)
+
+Standard IR receivers use inverted / active-low signalling
+and the gpio-ir overlay configures the GPIO appropriately
+as GPIO_ACTIVE_LOW (1).
+
+In order to support (rather rare) non-inverted / active-high
+signalling the GPIO needs to be configured as GPIO_ACTIVE_HIGH (0).
+
+Add an "invert" parameter to override this like in the gpio-ir-tx
+overlay.
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+---
+ arch/arm/boot/dts/overlays/README              | 4 ++++
+ arch/arm/boot/dts/overlays/gpio-ir-overlay.dts | 1 +
+ 2 files changed, 5 insertions(+)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -754,6 +754,10 @@ Params: gpio_pin                Input pi
+         gpio_pull               Desired pull-up/down state (off, down, up)
+                                 Default is "up".
+ 
++        invert                  "1" = invert the input (active-low signalling).
++                                "0" = non-inverted input (active-high
++                                signalling). Default is "1".
++
+         rc-map-name             Default rc keymap (can also be changed by
+                                 ir-keytable), defaults to "rc-rc6-mce"
+ 
+--- a/arch/arm/boot/dts/overlays/gpio-ir-overlay.dts
++++ b/arch/arm/boot/dts/overlays/gpio-ir-overlay.dts
+@@ -42,6 +42,7 @@
+                                 <&gpio_ir_pins>,"brcm,pins:0",
+                                 <&gpio_ir_pins>,"reg:0";
+                 gpio_pull = <&gpio_ir_pins>,"brcm,pull:0";              // pull-up/down state
++                invert = <&gpio_ir>,"gpios:8";                          // 0 = active high input
+ 
+                 rc-map-name = <&gpio_ir>,"linux,rc-map-name";           // default rc map
+         };