mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 00:11:13 +00:00
77e97abf12
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>
41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
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")
|
|
|