mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
46 lines
1.3 KiB
Diff
46 lines
1.3 KiB
Diff
From 4bcb99a967998d255ef009bb0b6880ae99c6f6bf Mon Sep 17 00:00:00 2001
|
|
From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
|
|
Date: Wed, 6 Nov 2019 10:59:44 +0100
|
|
Subject: [PATCH] ARM: dts: bcm2711: force CMA into first GB of memory
|
|
|
|
arm64 places the CMA in ZONE_DMA32, which is not good enough for the
|
|
Raspberry Pi 4 since it contains peripherals that can only address the
|
|
first GB of memory. Explicitly place the CMA into that area.
|
|
|
|
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
|
|
Acked-by: Stefan Wahren <wahrenst@gmx.net>
|
|
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
---
|
|
arch/arm/boot/dts/bcm2711.dtsi | 20 ++++++++++++++++++++
|
|
1 file changed, 20 insertions(+)
|
|
|
|
--- a/arch/arm/boot/dts/bcm2711.dtsi
|
|
+++ b/arch/arm/boot/dts/bcm2711.dtsi
|
|
@@ -12,6 +12,26 @@
|
|
|
|
interrupt-parent = <&gicv2>;
|
|
|
|
+ reserved-memory {
|
|
+ #address-cells = <2>;
|
|
+ #size-cells = <1>;
|
|
+ ranges;
|
|
+
|
|
+ /*
|
|
+ * arm64 reserves the CMA by default somewhere in ZONE_DMA32,
|
|
+ * that's not good enough for the BCM2711 as some devices can
|
|
+ * only address the lower 1G of memory (ZONE_DMA).
|
|
+ */
|
|
+ linux,cma {
|
|
+ compatible = "shared-dma-pool";
|
|
+ size = <0x2000000>; /* 32MB */
|
|
+ alloc-ranges = <0x0 0x00000000 0x40000000>;
|
|
+ reusable;
|
|
+ linux,cma-default;
|
|
+ };
|
|
+ };
|
|
+
|
|
+
|
|
soc {
|
|
/*
|
|
* Defined ranges:
|