diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 18:04:33 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 23:42:32 +0100 |
| commit | f07e572f6447465d8938679533d604e402b0f066 (patch) | |
| tree | cb333bd2a67e59e7c07659514850a0fd55fc825e /target/linux/bcm27xx/patches-5.4/950-0692-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch | |
| parent | 5d3a6fd970619dfc55f8259035c3027d7613a2a6 (diff) | |
| download | upstream-f07e572f6447465d8938679533d604e402b0f066.tar.gz upstream-f07e572f6447465d8938679533d604e402b0f066.tar.bz2 upstream-f07e572f6447465d8938679533d604e402b0f066.zip | |
bcm27xx: import latest patches from the RPi foundation
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>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0692-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0692-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0692-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch b/target/linux/bcm27xx/patches-5.4/950-0692-ARM-dts-bcm2711-Allow-40-bit-DMA-for-SPI.patch new file mode 100644 index 0000000000..ac6543fe4f --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0692-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") + |