brcm2708: update to latest patches from RPi foundation

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0461-arm-bcm2835-DMA-can-only-address-1GB.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0461-arm-bcm2835-DMA-can-only-address-1GB.patch b/target/linux/brcm2708/patches-4.19/950-0461-arm-bcm2835-DMA-can-only-address-1GB.patch
new file mode 100644 (file)
index 0000000..89919c1
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0461-arm-bcm2835-DMA-can-only-address-1GB.patch
@@ -0,0 +1,25 @@
+From 9334afe7293b3a78b7e070a70880b2db7aa98365 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 29 May 2019 15:47:42 +0100
+Subject: [PATCH] arm: bcm2835: DMA can only address 1GB
+
+The legacy peripherals can only address the first gigabyte of RAM, so
+ensure that DMA allocations are restricted to that region.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/mach-bcm/board_bcm2835.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/arch/arm/mach-bcm/board_bcm2835.c
++++ b/arch/arm/mach-bcm/board_bcm2835.c
+@@ -123,6 +123,9 @@ static const char * const bcm2835_compat
+ };
+ 
+ DT_MACHINE_START(BCM2835, "BCM2835")
++#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
++      .dma_zone_size  = SZ_1G,
++#endif
+       .map_io = bcm2835_map_io,
+       .init_machine = bcm2835_init,
+       .dt_compat = bcm2835_compat,