From: Linus Walleij Date: Sat, 19 Oct 2024 20:39:35 +0000 (+0200) Subject: ARM: dts: bcm6846: Add ARM PL081 DMA block X-Git-Tag: v6.14-rc1~103^2~11^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3abdd3eb88a2f72daa57daf4142226441b9421dd;p=thirdparty%2Flinux.git ARM: dts: bcm6846: Add ARM PL081 DMA block The ARM PL081 DMA controller can be found in the BCM6846 memory map, and it turns out to work. The block may be used as DMA engine for some of the peripherals (maybe the EMMC controller found in the same group of peripherals?) but it can always be used as a memcpy engine, which is a generic "blitter". I tested it with the dmatest module, and it copies lots of data very fast and fires hundreds of thousands of interrupts so it works just fine. Add it to the BCM6846 DTSI file. Signed-off-by: Linus Walleij Link: https://lore.kernel.org/r/20241019-genexis-xg6846b-base-v3-6-8375a0e1f89f@linaro.org Signed-off-by: Florian Fainelli --- diff --git a/arch/arm/boot/dts/broadcom/bcm6846.dtsi b/arch/arm/boot/dts/broadcom/bcm6846.dtsi index 378dbd1b41b31..e0e06af3fe891 100644 --- a/arch/arm/boot/dts/broadcom/bcm6846.dtsi +++ b/arch/arm/boot/dts/broadcom/bcm6846.dtsi @@ -240,5 +240,18 @@ #size-cells = <0>; status = "disabled"; }; + + pl081_dma: dma-controller@59000 { + compatible = "arm,pl081", "arm,primecell"; + // The magic B105F00D info is missing + arm,primecell-periphid = <0x00041081>; + reg = <0x59000 0x1000>; + interrupts = ; + memcpy-burst-size = <256>; + memcpy-bus-width = <32>; + clocks = <&periph_clk>; + clock-names = "apb_pclk"; + #dma-cells = <2>; + }; }; };