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    SubjectRe: [PATCH] irqchip/gic-v3: Support MSIs via aliases and distributor
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    Hi Stephen,

    Thanks for the patch.
    On 27/11/17 10:24, Stephen Boyd wrote:
    > Some GIC configurations don't have an accessible ITS, but they
    > want to support MSIs through the distributor's SETSPI registers
    > or through the IMPLEMENTATION DEFINED message-based interrupt
    > request register region. This mode of operation is similar to the
    > v2m support on gic-400, but we don't necessarily know what
    > particular SPIs are supported as MSIs so we need some help from
    > firmware to know what to do.
    >
    > Introduce an "arm,spi-ranges" property for this, similar to the
    > "marvell,spi-ranges" property, that indicates the base and size
    > of each MSI range. This property applies equally to the
    > distributor and alias registers. In either case, we detect this
    > mode of operation by looking for a node with the "msi-controller"
    > property and then probe the v2m frame code on top of it. Assume
    > these nodes will have the "arm,spi-ranges" property in them so
    > that the v2m code works mostly unmodified.
    >
    > Cc: <devicetree@vger.kernel.org>
    > Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    > Cc: Marc Zyngier <marc.zyngier@arm.com>
    > Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

    Tested it on DB820c board.

    Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

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