linux-kernel - RE: [PATCH v6 3/3] PCI: layerscape: Add LS1028a support

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Date:   Tue, 8 Oct 2019 07:11:47 +0000
From:   Xiaowei Bao <xiaowei.bao@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Leo Li <leoyang.li@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "Z.q. Hou" <zhiqiang.hou@....com>
Subject: RE: [PATCH v6 3/3] PCI: layerscape: Add LS1028a support



> -----Original Message-----
> From: Shawn Guo <shawnguo@...nel.org>
> Sent: 2019年10月3日 17:11
> To: Xiaowei Bao <xiaowei.bao@....com>
> Cc: robh+dt@...nel.org; mark.rutland@....com; Leo Li
> <leoyang.li@....com>; M.h. Lian <minghuan.lian@....com>; Mingkai Hu
> <mingkai.hu@....com>; Roy Zang <roy.zang@....com>;
> lorenzo.pieralisi@....com; linux-pci@...r.kernel.org;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-arm-kernel@...ts.infradead.org; linuxppc-dev@...ts.ozlabs.org;
> bhelgaas@...gle.com; Z.q. Hou <zhiqiang.hou@....com>
> Subject: Re: [PATCH v6 3/3] PCI: layerscape: Add LS1028a support
> 
> On Mon, Sep 02, 2019 at 11:43:19AM +0800, Xiaowei Bao wrote:
> > Add support for the LS1028a PCIe controller.
> >
> > Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> > ---
> > v2:
> >  - No change.
> > v3:
> >  - Reuse the ls2088 driver data structurt.
> > v4:
> >  - No change.
> > v5:
> >  - No change.
> > v6:
> >  - No change.
> >
> >  drivers/pci/controller/dwc/pci-layerscape.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-layerscape.c
> > b/drivers/pci/controller/dwc/pci-layerscape.c
> > index 3a5fa26..f24f79a 100644
> > --- a/drivers/pci/controller/dwc/pci-layerscape.c
> > +++ b/drivers/pci/controller/dwc/pci-layerscape.c
> > @@ -263,6 +263,7 @@ static const struct ls_pcie_drvdata ls2088_drvdata
> > = {  static const struct of_device_id ls_pcie_of_match[] = {
> >  	{ .compatible = "fsl,ls1012a-pcie", .data = &ls1046_drvdata },
> >  	{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021_drvdata },
> > +	{ .compatible = "fsl,ls1028a-pcie", .data = &ls2088_drvdata },
> 
> I think you can save this driver change by using "fsl,ls2088a-pcie" as
> compatible fallback like below.
> 
>   compatible = "fsl,ls1028a-pcie", "fsl,ls2088a-pcie";

Yes, it is ok to do so, but according to the previous code, I think add a new compatible " fsl,ls1028a-pcie " to driver is better.

Thanks 
Xiaowei

> 
> Shawn
> 
> >  	{ .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
> >  	{ .compatible = "fsl,ls1046a-pcie", .data = &ls1046_drvdata },
> >  	{ .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
> > --
> > 2.9.5
> >