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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0343-overlays-Remove-hack-from-uart0-overlay.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0343-overlays-Remove-hack-from-uart0-overlay.patch45
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0343-overlays-Remove-hack-from-uart0-overlay.patch b/target/linux/bcm27xx/patches-5.4/950-0343-overlays-Remove-hack-from-uart0-overlay.patch
new file mode 100644
index 0000000000..ac70b35413
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0343-overlays-Remove-hack-from-uart0-overlay.patch
@@ -0,0 +1,45 @@
+From d24bb9c4b5d3b0bb2bd5dd922bae3fce894ab87e Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 1 Oct 2019 10:19:50 +0100
+Subject: [PATCH] overlays: Remove hack from uart0 overlay
+
+The uart0 overlay contained a hack to return GPIOs 14 and 15 to inputs
+when the UART0 function was moved to alternative pins. This has the
+unwanted side effect of claiming GPIOs 14 & 15, preventing them being
+used for something else.
+
+See: https://github.com/raspberrypi/linux/issues/2856
+ https://www.raspberrypi.org/forums/viewtopic.php?f=98&t=252911
+
+Signed-off-by: Stefan Enge <stefan.enge@escatec.com>
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/uart0-overlay.dts | 13 ++++++-------
+ 1 file changed, 6 insertions(+), 7 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/uart0-overlay.dts
++++ b/arch/arm/boot/dts/overlays/uart0-overlay.dts
+@@ -17,17 +17,16 @@
+ target = <&gpio>;
+ __overlay__ {
+ uart0_pins: uart0_pins {
+- brcm,pins = <14 15 14 15>;
+- brcm,function = <0 0 4 4>; /* alt0 */
+- brcm,pull = <0 0 0 2>;
++ brcm,pins = <14 15>;
++ brcm,function = <4>; /* alt0 */
++ brcm,pull = <0 2>;
+ };
+ };
+ };
+
+ __overrides__ {
+- txd0_pin = <&uart0_pins>,"brcm,pins:8";
+- rxd0_pin = <&uart0_pins>,"brcm,pins:12";
+- pin_func = <&uart0_pins>,"brcm,function:8",
+- <&uart0_pins>,"brcm,function:12";
++ txd0_pin = <&uart0_pins>,"brcm,pins:0";
++ rxd0_pin = <&uart0_pins>,"brcm,pins:4";
++ pin_func = <&uart0_pins>,"brcm,function:0";
+ };
+ };