linux-kernel - Re: [PATCH v4 1/4] dt-bindings: imx6q-pcie: Add reg-name "dbi2" and "atu" for i.MX8M PCIe Endpoint

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Message-ID: <172295524841.1489029.13563934125937656478.robh@kernel.org>
Date: Tue, 6 Aug 2024 08:40:50 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Richard Zhu <hongxing.zhu@....com>
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	kernel@...gutronix.de, krzk+dt@...nel.org,
	linux-kernel@...r.kernel.org, conor+dt@...nel.org,
	imx@...ts.linux.dev, linux-pci@...r.kernel.org, shawnguo@...nel.org,
	l.stach@...gutronix.de
Subject: Re: [PATCH v4 1/4] dt-bindings: imx6q-pcie: Add reg-name "dbi2" and
 "atu" for i.MX8M PCIe Endpoint


On Mon, 29 Jul 2024 09:56:42 +0800, Richard Zhu wrote:
> Add reg-name: "dbi2", "atu" for i.MX8M PCIe Endpoint.
> 
> For i.MX8M PCIe EP, the dbi2 and atu addresses are pre-defined in the
> driver. This method is not good.
> 
> In commit b7d67c6130ee ("PCI: imx6: Add iMX95 Endpoint (EP) support"),
> Frank suggests to fetch the dbi2 and atu from DT directly. This commit is
> preparation to do that for i.MX8M PCIe EP.
> 
> These changes wouldn't break driver function. When "dbi2" and "atu"
> properties are present, i.MX PCIe driver would fetch the according base
> addresses from DT directly. If only two reg properties are provided, i.MX
> PCIe driver would fall back to the old method.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> Reviewed-by: Frank Li <Frank.Li@....com>
> ---
>  .../devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml  | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>