target/linux/bcm27xx/patches-5.4/950-0406-bcm2838.dtsi-Use-BCM2711-PCIe-compatible-string.patch

   1 From 8be8dc74799fe7c0e09dfa53aa41e954ffba291c Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Fri, 12 Jul 2019 11:43:03 +0100
   4 Subject: [PATCH] bcm2838.dtsi: Use BCM2711 PCIe compatible string
   5
   6 The BCM2711 PCIe controller has a limited address range in the B0
   7 silicon, and the driver uses a compatible string to identify the
   8 limitation. The current Pi 4 firmware will override the compatible
   9 string if it detects a downstream DTB and it is running on a newer
  10 revision but set the default value to enable the workaround for
  11 backwards-compatibility with old firmware.
  12
  13 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  14 ---
  15  arch/arm/boot/dts/bcm2838.dtsi | 3 ++-
  16  1 file changed, 2 insertions(+), 1 deletion(-)
  17
  18 --- a/arch/arm/boot/dts/bcm2838.dtsi
  19 +++ b/arch/arm/boot/dts/bcm2838.dtsi
  20 @@ -314,7 +314,8 @@
  21                         #interrupt-cells = <1>;
  22                         #size-cells = <2>;
  23                         bus-range = <0x0 0x01>;
  24 -                       compatible = "brcm,bcm7211-pcie", "brcm,bcm7445-pcie",
  25 +                       compatible = "brcm,bcm2711b0-pcie", // Safe value
  26 +                                    "brcm,bcm2711-pcie",
  27                                      "brcm,pci-plat-dev";
  28                         max-link-speed = <2>;
  29                         tot-num-pcie = <1>;