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Date:   Sat, 7 Mar 2020 02:09:32 +0000
From:   Peng Ma <peng.ma@....com>
To:     Michael Walle <michael@...le.cc>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>, Leo Li <leoyang.li@....com>
Subject: RE: [EXT] [PATCH 2/2] arm64: dts: ls1028a: add "fsl,vf610-edma"
 compatible



>-----Original Message-----
>From: Michael Walle <michael@...le.cc>
>Sent: 2020年3月7日 4:54
>To: dmaengine@...r.kernel.org; devicetree@...r.kernel.org;
>linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org
>Cc: Vinod Koul <vkoul@...nel.org>; Rob Herring <robh+dt@...nel.org>; Mark
>Rutland <mark.rutland@....com>; Shawn Guo <shawnguo@...nel.org>; Leo Li
><leoyang.li@....com>; Peng Ma <peng.ma@....com>; Michael Walle
><michael@...le.cc>
>Subject: [EXT] [PATCH 2/2] arm64: dts: ls1028a: add "fsl,vf610-edma"
>compatible
>
>Caution: EXT Email
>
>The bootloader does the IOMMU fixup and dynamically adds the "iommus"
>property to devices according to its compatible string. In case of the eDMA
>controller this property is missing. Add it. After that the IOMMU will work with
>the eDMA core.
>
>Signed-off-by: Michael Walle <michael@...le.cc>
>---
> arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
>b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
>index b152fa90cf5c..aa467bff2209 100644
>--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
>+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
>@@ -447,7 +447,7 @@
>
>                edma0: dma-controller@...0000 {
>                        #dma-cells = <2>;
>-                       compatible = "fsl,ls1028a-edma";
>+                       compatible = "fsl,ls1028a-edma",
>+ "fsl,vf610-edma";
Hi Michael,

You should change it on bootloader instead of kernel, Some Reg of LS1028a is different
from others, So we used compatible "fsl,ls1028a-edm" to distinguish " fsl,vf610-edma".

Thanks,
Peng
>                        reg = <0x0 0x22c0000 0x0 0x10000>,
>                              <0x0 0x22d0000 0x0 0x10000>,
>                              <0x0 0x22e0000 0x0 0x10000>;
>--
>2.20.1

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