mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 06:57:57 +00:00
69 lines
2.3 KiB
Diff
69 lines
2.3 KiB
Diff
From f42cc245e1f3e586f1a26550e5760489b6c329ab Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Tue, 23 Jul 2019 12:55:07 +0100
|
|
Subject: [PATCH 712/806] overlays: audremap: Support GPIOs 18 & 19
|
|
|
|
PWM audio can also be used on GPIOs 18 and 19, so add the pins_18_19
|
|
parameter to select that location. pins_12_13 explicitly chooses GPIOs
|
|
12 and 13, although this is the default behaviour so is there only for
|
|
completeness.
|
|
|
|
See: https://github.com/raspberrypi/firmware/issues/1178
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
arch/arm/boot/dts/overlays/README | 4 +++-
|
|
arch/arm/boot/dts/overlays/audremap-overlay.dts | 16 ++++++++++++++++
|
|
2 files changed, 19 insertions(+), 1 deletion(-)
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -475,12 +475,14 @@ Params: <None>
|
|
|
|
|
|
Name: audremap
|
|
-Info: Switches PWM sound output to pins 12 (Right) & 13 (Left)
|
|
+Info: Switches PWM sound output to GPIOs on the 40-pin header
|
|
Load: dtoverlay=audremap,<param>=<val>
|
|
Params: swap_lr Reverse the channel allocation, which will also
|
|
swap the audio jack outputs (default off)
|
|
enable_jack Don't switch off the audio jack output
|
|
(default off)
|
|
+ pins_12_13 Select GPIOs 12 & 13 (default)
|
|
+ pins_18_19 Select GPIOs 18 & 19
|
|
|
|
|
|
Name: balena-fin
|
|
--- a/arch/arm/boot/dts/overlays/audremap-overlay.dts
|
|
+++ b/arch/arm/boot/dts/overlays/audremap-overlay.dts
|
|
@@ -7,13 +7,29 @@
|
|
fragment@0 {
|
|
target = <&audio_pins>;
|
|
frag0: __overlay__ {
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@1 {
|
|
+ target = <&audio_pins>;
|
|
+ __overlay__ {
|
|
brcm,pins = < 12 13 >;
|
|
brcm,function = < 4 >; /* alt0 alt0 */
|
|
};
|
|
};
|
|
|
|
+ fragment@2 {
|
|
+ target = <&audio_pins>;
|
|
+ __dormant__ {
|
|
+ brcm,pins = < 18 19 >;
|
|
+ brcm,function = < 2 >; /* alt5 alt5 */
|
|
+ };
|
|
+ };
|
|
+
|
|
__overrides__ {
|
|
swap_lr = <&frag0>, "swap_lr?";
|
|
enable_jack = <&frag0>, "enable_jack?";
|
|
+ pins_12_13 = <0>,"+1-2";
|
|
+ pins_18_19 = <0>,"-1+2";
|
|
};
|
|
};
|