diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch new file mode 100644 index 0000000000..ca582b8141 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch @@ -0,0 +1,45 @@ +From b006cc7ddfa96c044068ef367c0bc82c2d221ca3 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"; + }; + }; |