linux-kernel - Re: dma_mask limited to 32-bits with OF platform device

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Date:   Tue, 18 Feb 2020 11:22:11 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Roger Quadros <rogerq@...com>
Cc:     Christoph Hellwig <hch@....de>,
        Robin Murphy <robin.murphy@....com>,
        Péter Ujfalusi <peter.ujfalusi@...com>,
        Murali Karicheri <m-karicheri2@...com>,
        "Nori, Sekhar" <nsekhar@...com>, "Anna, Suman" <s-anna@...com>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Andreas Färber <afaerber@...e.de>,
        Hans Verkuil <hverkuil@...all.nl>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Nishanth Menon <nm@...com>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: dma_mask limited to 32-bits with OF platform device

On Tue, Feb 18, 2020 at 2:28 AM Roger Quadros <rogerq@...com> wrote:
>
> Chrishtoph,
>
> The branch works fine for SATA on DRA7 with CONFIG_LPAE once I
> have the below DT fix.
>
> Do you intend to send these fixes to -stable?
>
> ------------------------- arch/arm/boot/dts/dra7.dtsi -------------------------
> index d78b684e7fca..853ecf3cfb37 100644
> @@ -645,6 +645,8 @@
>                 sata: sata@...41100 {
>                         compatible = "snps,dwc-ahci";
>                         reg = <0x4a140000 0x1100>, <0x4a141100 0x7>;
> +                       #size-cells = <2>;
> +                       dma-ranges = <0x00000000 0x00000000 0x1 0x00000000>;

dma-ranges should be in the parent (bus) node, not the device node.

>                         interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
>                         phys = <&sata_phy>;
>                         phy-names = "sata-phy";
>
>
> cheers,
> -roger
>
> On 17/02/2020 15:21, Christoph Hellwig wrote:
> > Roger,
> >
> > can you try the branch below and check if that helps?
> >
> >      git://git.infradead.org/users/hch/misc.git arm-dma-bus-limit
> >
> > Gitweb:
> >
> >      http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/arm-dma-bus-limit
> >
>
> --
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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