linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am65: Change #address-cells and #size-cells of interconnect to 2

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Date:   Tue, 28 Aug 2018 09:25:56 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Tero Kristo <t-kristo@...com>, Nishanth Menon <nm@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Santosh Shilimkar <ssantosh@...nel.org>, nsekhar@...com
Subject: Re: [PATCH] arm64: dts: ti: k3-am65: Change #address-cells and
 #size-cells of interconnect to 2

* Kishon Vijay Abraham I <kishon@...com> [180828 10:31]:
> AM65 has two PCIe controllers and each PCIe controller has '2' address
> spaces one within the 4GB address space of the SoC and the other above
> the 4GB address space of the SoC in addition to the register space. The
> size of the address space above the 4GB SoC address space is 4GB. These
> address ranges will be used by CPU/DMA to access the PCIe address space.
> In order to represent the address space above the 4GB SoC address space
> and to represent the size of this address space as 4GB, change
> address-cells and size-cells of interconnect to 2.
...
>  		cbass_mcu: interconnect@...80000 {
>  			compatible = "simple-bus";
>  			#address-cells = <1>;
>  			#size-cells = <1>;

Yup great, the interconnect instances that don't need above 4GB
address space should stay this way.

Acked-by: Tony Lindgren <tony@...mide.com>