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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0713-overlays-audremap-Support-GPIOs-18-19.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0713-overlays-audremap-Support-GPIOs-18-19.patch68
1 files changed, 68 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0713-overlays-audremap-Support-GPIOs-18-19.patch b/target/linux/brcm2708/patches-4.19/950-0713-overlays-audremap-Support-GPIOs-18-19.patch
new file mode 100644
index 0000000000..873aaa0562
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0713-overlays-audremap-Support-GPIOs-18-19.patch
@@ -0,0 +1,68 @@
+From 17f3a0913e581da33dc7bed5f526e1c4c3181937 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 23 Jul 2019 12:55:07 +0100
+Subject: [PATCH 713/773] 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";
+ };
+ };