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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0474-gpio-ir-overlay-add-parameter-to-configure-signal-po.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0474-gpio-ir-overlay-add-parameter-to-configure-signal-po.patch45
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
+ };