target/linux/bcm27xx/patches-5.4/950-0925-ARM-dts-Add-UART-skip-init-properties-for-U-boot.patch

   1 From 197b4fbd218a0a12573cdfcb011eeb3f00765d96 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Fri, 17 Jul 2020 11:20:07 +0100
   4 Subject: [PATCH] ARM: dts: Add UART skip-init properties for U-boot
   5
   6 U-boot can get stuck trying to initialise UARTs that aren't mapped
   7 to the pin header. There is no reason for U-boot not to rely on the
   8 initialisation by the firmware, so tag both UARTs with the u-boot
   9 magic boolean property "skip-init".
  10
  11 See: https://github.com/raspberrypi/linux/pull/3731
  12      https://lists.denx.de/pipermail/u-boot/2017-April/285606.html
  13
  14 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  15 ---
  16  arch/arm/boot/dts/bcm270x-rpi.dtsi | 8 ++++++++
  17  1 file changed, 8 insertions(+)
  18
  19 --- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
  20 +++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
  21 @@ -102,6 +102,14 @@
  22         };
  23  };
  24
  25 +&uart0 {
  26 +       skip-init;
  27 +};
  28 +
  29 +&uart1 {
  30 +       skip-init;
  31 +};
  32 +
  33  &txp {
  34         status = "disabled";
  35  };