aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch
diff options
context:
space:
mode:
authorÁlvaro Fernández Rojas <noltari@gmail.com>2020-05-28 19:08:55 +0200
committerÁlvaro Fernández Rojas <noltari@gmail.com>2020-05-28 19:12:43 +0200
commit77e97abf129c5028385dd72587eabab68db0d954 (patch)
treefc52a8c2ba346da77281f00538a1eb6de49deb5d /target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch
parent5d3a0c6b26144eb5d62515b99613b5ad8dbdc717 (diff)
downloadupstream-77e97abf129c5028385dd72587eabab68db0d954.tar.gz
upstream-77e97abf129c5028385dd72587eabab68db0d954.tar.bz2
upstream-77e97abf129c5028385dd72587eabab68db0d954.zip
bcm27xx: update to latest patches from RPi foundation
Also removes random module and switches to new bcm2711 thermal driver. Boot tested on RPi 4B v1.1 4G. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch40
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch b/target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch
new file mode 100644
index 0000000000..ac6543fe4f
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0699-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch
@@ -0,0 +1,40 @@
+From 0dcafa8ab800d1f534bb0cb51cd02a082cf34be6 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 30 Apr 2020 12:43:05 +0100
+Subject: [PATCH] ARM: dts: bcm2711: Allow 40-bit DMA for SPI
+
+Add the spi_dma4 DT parameter to enable use of the 40-bit DMA channels
+to drive SPI. Note that there are only 3-4 40-bit channels available,
+and using this parameter claims 2 of them.
+
+Usage: dtparam=spi_dma4
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 2 ++
+ arch/arm/boot/dts/overlays/README | 4 ++++
+ 2 files changed, 6 insertions(+)
+
+--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
++++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+@@ -554,5 +554,7 @@
+ eth_led0 = <&phy1>,"led-modes:0";
+ eth_led1 = <&phy1>,"led-modes:4";
+
++ spi_dma4 = <&spi0>, "dmas:0=", <&dma40>,
++ <&spi0>, "dmas:8=", <&dma40>;
+ };
+ };
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -159,6 +159,10 @@ Params:
+ spi Set to "on" to enable the spi interfaces
+ (default "off")
+
++ spi_dma4 Use to enable 40-bit DMA on spi interfaces
++ (the assigned value doesn't matter)
++ (2711 only)
++
+ random Set to "on" to enable the hardware random
+ number generator (default "on")
+