target/linux/bcm27xx/patches-5.4/950-0347-overlays-Remove-hack-from-uart0-overlay.patch

   1 From d24bb9c4b5d3b0bb2bd5dd922bae3fce894ab87e Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 1 Oct 2019 10:19:50 +0100
   4 Subject: [PATCH] overlays: Remove hack from uart0 overlay
   5
   6 The uart0 overlay contained a hack to return GPIOs 14 and 15 to inputs
   7 when the UART0 function was moved to alternative pins. This has the
   8 unwanted side effect of claiming GPIOs 14 & 15, preventing them being
   9 used for something else.
  10
  11 See: https://github.com/raspberrypi/linux/issues/2856
  12      https://www.raspberrypi.org/forums/viewtopic.php?f=98&t=252911
  13
  14 Signed-off-by: Stefan Enge <stefan.enge@escatec.com>
  15 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  16 ---
  17  arch/arm/boot/dts/overlays/uart0-overlay.dts | 13 ++++++-------
  18  1 file changed, 6 insertions(+), 7 deletions(-)
  19
  20 --- a/arch/arm/boot/dts/overlays/uart0-overlay.dts
  21 +++ b/arch/arm/boot/dts/overlays/uart0-overlay.dts
  22 @@ -17,17 +17,16 @@
  23                 target = <&gpio>;
  24                 __overlay__ {
  25                         uart0_pins: uart0_pins {
  26 -                               brcm,pins = <14 15 14 15>;
  27 -                               brcm,function = <0 0 4 4>; /* alt0 */
  28 -                               brcm,pull = <0 0 0 2>;
  29 +                               brcm,pins = <14 15>;
  30 +                               brcm,function = <4>; /* alt0 */
  31 +                               brcm,pull = <0 2>;
  32                         };
  33                 };
  34         };
  35
  36         __overrides__ {
  37 -               txd0_pin = <&uart0_pins>,"brcm,pins:8";
  38 -               rxd0_pin = <&uart0_pins>,"brcm,pins:12";
  39 -               pin_func = <&uart0_pins>,"brcm,function:8",
  40 -                          <&uart0_pins>,"brcm,function:12";
  41 +               txd0_pin = <&uart0_pins>,"brcm,pins:0";
  42 +               rxd0_pin = <&uart0_pins>,"brcm,pins:4";
  43 +               pin_func = <&uart0_pins>,"brcm,function:0";
  44         };
  45  };