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    SubjectRe: [PATCH 2/3] ARM: dts: mvebu: add sdram controller node to Armada-38x
    Date
    Hi Chris,

    On mar., janv. 09 2018, Chris Packham <chris.packham@alliedtelesis.co.nz> wrote:

    > The Armada-38x uses an SDRAM controller that is compatible with the
    > Armada-XP. The key difference is the width of the bus (XP is 64/32, 38x
    > is 32/16). The SDRAM controller registers are the same between the two
    > SoCs.
    >
    > Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
    > ---
    > arch/arm/boot/dts/armada-38x.dtsi | 5 +++++
    > 1 file changed, 5 insertions(+)
    >
    > diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
    > index 00ff549d4e39..6d34c5ec178f 100644
    > --- a/arch/arm/boot/dts/armada-38x.dtsi
    > +++ b/arch/arm/boot/dts/armada-38x.dtsi
    > @@ -138,6 +138,11 @@
    > #size-cells = <1>;
    > ranges = <0 MBUS_ID(0xf0, 0x01) 0 0x100000>;
    >
    > + sdramc@1400 {

    Could you add a label? Thanks to this it would be possible to
    enable/disable it at board level in a esay way.

    > + compatible = "marvell,armada-xp-sdram-controller";
    > + reg = <0x1400 0x500>;

    What about adding status = "disabled" ?

    Thanks to this we can enable it at board level only if we really want
    it, it would avoid nasty regression on boards that don't need it, if an
    issue occurs. Unless you are sure that it is completely safe to enable
    it for everyone.

    Thanks,

    Gregory


    > + };
    > +
    > L2: cache-controller@8000 {
    > compatible = "arm,pl310-cache";
    > reg = <0x8000 0x1000>;
    > --
    > 2.15.1
    >

    --
    Gregory Clement, Free Electrons
    Kernel, drivers, real-time and embedded Linux
    development, consulting, training and support.
    http://free-electrons.com

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