openwrt_lede/target/linux/brcm2708/patches-4.4/0105-dts-Added-overlay-for-gpio_ir_recv-driver.patch

From 95901c883fd6a5220e0aee84a9f52179d6410a1d Mon Sep 17 00:00:00 2001
From: Holger Steinhaus <hsteinhaus@gmx.de>
Date: Sat, 14 Nov 2015 18:37:43 +0100
Subject: [PATCH] dts: Added overlay for gpio_ir_recv driver

---
 arch/arm/boot/dts/overlays/Makefile            |  1 +
 arch/arm/boot/dts/overlays/README              | 18 ++++++++++-
 arch/arm/boot/dts/overlays/gpio-ir-overlay.dts | 45 ++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/overlays/gpio-ir-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -16,6 +16,7 @@ dtb-$(RPI_DT_OVERLAYS) += ads7846-overla
 dtb-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += dht11-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += enc28j60-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += gpio-ir-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += gpio-poweroff-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hifiberry-amp-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hifiberry-dac-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -196,6 +196,22 @@ Params: int_pin                  GPIO us
         speed                    SPI bus speed (default 12000000)
 
 
+Name:   gpio-ir
+Info:   Use GPIO pin as rc-core style infrared receiver input. The rc-core-
+        based gpio_ir_recv driver maps received keys directly to a
+        /dev/input/event* device, all decoding is done by the kernel - LIRC is
+        not required! The key mapping and other decoding parameters can be
+        configured by "ir-keytable" tool.
+Load:   dtoverlay=gpio-ir,<param>=<val>
+Params: gpio_pin                 Input pin number. Default is 18.
+
+        gpio_pull                Desired pull-up/down state (off, down, up)
+                                 Default is "down".
+
+        rc-map-name              Default rc keymap (can also be changed by
+                                 ir-keytable), defaults to "rc-rc6-mce"
+
+
 Name:   gpio-poweroff
 Info:   Drives a GPIO high or low on reboot
 Load:   dtoverlay=gpio-poweroff,<param>=<val>
@@ -308,7 +324,7 @@ Params: <None>
 Name:   lirc-rpi
 Info:   Configures lirc-rpi (Linux Infrared Remote Control for Raspberry Pi)
         Consult the module documentation for more details.
-Load:   dtoverlay=lirc-rpi,<param>=<val>,...
+Load:   dtoverlay=lirc-rpi,<param>=<val>
 Params: gpio_out_pin             GPIO for output (default "17")
 
         gpio_in_pin              GPIO for input (default "18")
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/gpio-ir-overlay.dts
@@ -0,0 +1,45 @@
+// Definitions for ir-gpio module
+/dts-v1/;
+/plugin/;
+
+/ {
+        compatible = "brcm,bcm2708";
+
+        fragment@0 {
+                target-path = "/";
+                __overlay__ {
+                        gpio_ir: ir-receiver {
+                                compatible = "gpio-ir-receiver";
+
+                                // pin number, high or low
+                                gpios = <&gpio 18 1>;
+
+                                // parameter for keymap name
+                                linux,rc-map-name = "rc-rc6-mce";
+
+                                status = "okay";
+                        };
+                };
+        };
+
+        fragment@1 {
+                target = <&gpio>;
+                __overlay__ {
+                        gpio_ir_pins: gpio_ir_pins {
+                                brcm,pins = <18>;                       // pin 18
+                                brcm,function = <0>;                    // in
+                                brcm,pull = <1>;                        // down
+                        };
+                };
+        };
+
+        __overrides__ {
+                // parameters
+                gpio_pin =      <&gpio_ir>,"gpios:4",
+                                        <&gpio_ir_pins>,"brcm,pins:0",
+                                        <&gpio_ir_pins>,"brcm,pull:0";  // pin number
+                gpio_pull = <&gpio_ir_pins>,"brcm,pull:0";              // pull-up/down state
+
+                rc-map-name = <&gpio_ir>,"linux,rc-map-name";           // default rc map
+        };
+};