diff mbox series

[PATCHv2,22/25] dt-bindings: pci: Add NXP Layerscape SoCs PCIe Gen4 controller

Message ID 20181120092615.11680-23-Zhiqiang.Hou@nxp.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show
Series PCI: refactor Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs | expand

Commit Message

Z.Q. Hou Nov. 20, 2018, 9:27 a.m. UTC 
From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Add PCIe Gen4 controller DT bindings of NXP Layerscape SoCs.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
V2:
 - Change to use the layerscape-pci.txt for PCIe Gen4 controller
   dt-bindings

 .../bindings/pci/layerscape-pci.txt           | 57 +++++++++++++++++++
 MAINTAINERS                                   |  8 +++
 2 files changed, 65 insertions(+)

Comments

M.h. Lian Nov. 20, 2018, 11:31 a.m. UTC | #1 
reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>

> -----Original Message-----
> From: Z.q. Hou
> Sent: Tuesday, November 20, 2018 5:28 PM
> To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com;
> l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com;
> catalin.marinas@arm.com; will.deacon@arm.com
> Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian
> <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou
> <zhiqiang.hou@nxp.com>
> Subject: [PATCHv2 22/25] dt-bindings: pci: Add NXP Layerscape SoCs PCIe
> Gen4 controller
> 
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> 
> Add PCIe Gen4 controller DT bindings of NXP Layerscape SoCs.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> ---
> V2:
>  - Change to use the layerscape-pci.txt for PCIe Gen4 controller
>    dt-bindings
> 
>  .../bindings/pci/layerscape-pci.txt           | 57 +++++++++++++++++++
>  MAINTAINERS                                   |  8 +++
>  2 files changed, 65 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> index 66df1e81e0b8..3ef8836b6e97 100644
> --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> +++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> @@ -1,4 +1,6 @@
> +====================================
>  Freescale Layerscape PCIe controller
> +====================================
> 
>  This PCIe host controller is based on the Synopsys DesignWare PCIe IP  and
> thus inherits all the common properties defined in designware-pcie.txt.
> @@ -58,3 +60,58 @@ Example:
>  				<0000 0 0 3 &gic GIC_SPI 190
> IRQ_TYPE_LEVEL_HIGH>,
>  				<0000 0 0 4 &gic GIC_SPI 192
> IRQ_TYPE_LEVEL_HIGH>;
>  	};
> +
> +===================================
> +NXP Layerscape PCIe Gen4 controller
> +===================================
> +
> +This PCIe controller is based on the Mobiveil PCIe IP and thus inherits
> +all the common properties defined in mobiveil-pcie.txt.
> +
> +Required properties:
> +- compatible: should contain the platform identifier such as:
> +  "fsl,lx2160a-pcie"
> +- reg: base addresses and lengths of the PCIe controller register blocks.
> +  "config_axi_slave": PCIe controller registers
> +  "csr_axi_slave": Bridge config registers
> +- interrupts: A list of interrupt outputs of the controller. Must
> +contain an
> +  entry for each entry in the interrupt-names property.
> +- interrupt-names: It could include the following entries:
> +  "intr": The interrupt that is asserted for controller interrupts
> +  "aer": Asserted for aer interrupt when chip support the aer interrupt with
> +	 none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
> +  "pme": Asserted for pme interrupt when chip support the pme interrupt
> with
> +	 none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
> +- dma-coherent: Indicates that the hardware IP block can ensure the
> +coherency
> +  of the data transferred from/to the IP block. This can avoid the
> +software
> +  cache flush/invalid actions, and improve the performance significantly.
> +- msi-parent : See the generic MSI binding described in
> +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> +
> +Example:
> +
> +	pcie@3400000 {
> +		compatible = "fsl,lx2160a-pcie";
> +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller
> registers */
> +		       0x80 0x00000000 0x0 0x00001000>; /* configuration
> space */
> +		reg-names = "csr_axi_slave", "config_axi_slave";
> +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER
> interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME
> interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /*
> controller interrupt */
> +		interrupt-names = "aer", "pme", "intr";
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +		device_type = "pci";
> +		apio-wins = <8>;
> +		ppio-wins = <8>;
> +		dma-coherent;
> +		bus-range = <0x0 0xff>;
> +		msi-parent = <&its>;
> +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0
> 0x40000000>;
> +		#interrupt-cells = <1>;
> +		interrupt-map-mask = <0 0 0 7>;
> +		interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 2 &gic 0 0 GIC_SPI 110
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 3 &gic 0 0 GIC_SPI 111
> IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 4 &gic 0 0 GIC_SPI 112
> IRQ_TYPE_LEVEL_HIGH>;
> +	};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 084d225583e0..b59763e23392 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11405,6 +11405,14 @@ L:	linux-arm-kernel@lists.infradead.org
>  S:	Maintained
>  F:	drivers/pci/controller/dwc/*layerscape*
> 
> +PCI DRIVER FOR NXP LAYERSCAPE GEN4 CONTROLLER
> +M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> +L:	linux-pci@vger.kernel.org
> +L:	linux-arm-kernel@lists.infradead.org
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/pci/layerscape-pci.txt
> +F:	drivers/pci/controller/mobibeil/pci-layerscape-gen4.c
> +
>  PCI DRIVER FOR GENERIC OF HOSTS
>  M:	Will Deacon <will.deacon@arm.com>
>  L:	linux-pci@vger.kernel.org
> --
> 2.17.1
Rob Herring (Arm) Dec. 5, 2018, 10:38 p.m. UTC | #2 
On Tue, Nov 20, 2018 at 09:27:51AM +0000, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> 
> Add PCIe Gen4 controller DT bindings of NXP Layerscape SoCs.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> ---
> V2:
>  - Change to use the layerscape-pci.txt for PCIe Gen4 controller
>    dt-bindings

Sorry someone suggested this, but it seems there's no point in having 
these in the same file. New IP block, do a new file.

> 
>  .../bindings/pci/layerscape-pci.txt           | 57 +++++++++++++++++++
>  MAINTAINERS                                   |  8 +++
>  2 files changed, 65 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> index 66df1e81e0b8..3ef8836b6e97 100644
> --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> +++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> @@ -1,4 +1,6 @@
> +====================================
>  Freescale Layerscape PCIe controller
> +====================================
>  
>  This PCIe host controller is based on the Synopsys DesignWare PCIe IP
>  and thus inherits all the common properties defined in designware-pcie.txt.
> @@ -58,3 +60,58 @@ Example:
>  				<0000 0 0 3 &gic GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
>  				<0000 0 0 4 &gic GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
>  	};
> +
> +===================================
> +NXP Layerscape PCIe Gen4 controller
> +===================================
> +
> +This PCIe controller is based on the Mobiveil PCIe IP and thus inherits all
> +the common properties defined in mobiveil-pcie.txt.
> +
> +Required properties:
> +- compatible: should contain the platform identifier such as:
> +  "fsl,lx2160a-pcie"
> +- reg: base addresses and lengths of the PCIe controller register blocks.
> +  "config_axi_slave": PCIe controller registers
> +  "csr_axi_slave": Bridge config registers

Wouldn't 'config' and 'csr' be sufficient? And these should be listed 
under reg-names.

> +- interrupts: A list of interrupt outputs of the controller. Must contain an
> +  entry for each entry in the interrupt-names property.
> +- interrupt-names: It could include the following entries:
> +  "intr": The interrupt that is asserted for controller interrupts
> +  "aer": Asserted for aer interrupt when chip support the aer interrupt with
> +	 none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
> +  "pme": Asserted for pme interrupt when chip support the pme interrupt with
> +	 none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
> +- dma-coherent: Indicates that the hardware IP block can ensure the coherency
> +  of the data transferred from/to the IP block. This can avoid the software
> +  cache flush/invalid actions, and improve the performance significantly.
> +- msi-parent : See the generic MSI binding described in
> +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> +
> +Example:
> +
> +	pcie@3400000 {
> +		compatible = "fsl,lx2160a-pcie";
> +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers */
> +		       0x80 0x00000000 0x0 0x00001000>; /* configuration space */
> +		reg-names = "csr_axi_slave", "config_axi_slave";

The order should match what's defined above.

Also, normally the config space would be the bigger region unless config 
accesses are windowed.

> +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
> +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
> +		interrupt-names = "aer", "pme", "intr";
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +		device_type = "pci";
> +		apio-wins = <8>;
> +		ppio-wins = <8>;

If these have specific values on your h/w, please specify above.

> +		dma-coherent;
> +		bus-range = <0x0 0xff>;
> +		msi-parent = <&its>;
> +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>;
> +		#interrupt-cells = <1>;
> +		interrupt-map-mask = <0 0 0 7>;
> +		interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 2 &gic 0 0 GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 3 &gic 0 0 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
> +				<0000 0 0 4 &gic 0 0 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
> +	};
Rob Herring (Arm) Dec. 5, 2018, 10:40 p.m. UTC | #3 
On Wed, Dec 5, 2018 at 4:38 PM Rob Herring <robh@kernel.org> wrote:
>
> On Tue, Nov 20, 2018 at 09:27:51AM +0000, Z.q. Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Add PCIe Gen4 controller DT bindings of NXP Layerscape SoCs.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > ---
> > V2:
> >  - Change to use the layerscape-pci.txt for PCIe Gen4 controller
> >    dt-bindings
>
> Sorry someone suggested this, but it seems there's no point in having
> these in the same file. New IP block, do a new file.
>
> >
> >  .../bindings/pci/layerscape-pci.txt           | 57 +++++++++++++++++++
> >  MAINTAINERS                                   |  8 +++
> >  2 files changed, 65 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > index 66df1e81e0b8..3ef8836b6e97 100644
> > --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > +++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > @@ -1,4 +1,6 @@
> > +====================================
> >  Freescale Layerscape PCIe controller
> > +====================================
> >
> >  This PCIe host controller is based on the Synopsys DesignWare PCIe IP
> >  and thus inherits all the common properties defined in designware-pcie.txt.
> > @@ -58,3 +60,58 @@ Example:
> >                               <0000 0 0 3 &gic GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
> >                               <0000 0 0 4 &gic GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
> >       };
> > +
> > +===================================
> > +NXP Layerscape PCIe Gen4 controller
> > +===================================
> > +
> > +This PCIe controller is based on the Mobiveil PCIe IP and thus inherits all
> > +the common properties defined in mobiveil-pcie.txt.
> > +
> > +Required properties:
> > +- compatible: should contain the platform identifier such as:
> > +  "fsl,lx2160a-pcie"
> > +- reg: base addresses and lengths of the PCIe controller register blocks.
> > +  "config_axi_slave": PCIe controller registers
> > +  "csr_axi_slave": Bridge config registers
>
> Wouldn't 'config' and 'csr' be sufficient? And these should be listed
> under reg-names.

NM on the names. I see these are inherited.

Rob
Z.Q. Hou Dec. 11, 2018, 9:50 a.m. UTC | #4 
Hi Rob,

Thanks a lot for your comments!

> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: 2018年12月6日 6:39
> To: Z.q. Hou <zhiqiang.hou@nxp.com>
> Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> bhelgaas@google.com; mark.rutland@arm.com;
> l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li
> <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com;
> catalin.marinas@arm.com; will.deacon@arm.com; Mingkai Hu
> <mingkai.hu@nxp.com>; M.h. Lian <minghuan.lian@nxp.com>; Xiaowei Bao
> <xiaowei.bao@nxp.com>
> Subject: Re: [PATCHv2 22/25] dt-bindings: pci: Add NXP Layerscape SoCs PCIe
> Gen4 controller
> 
> On Tue, Nov 20, 2018 at 09:27:51AM +0000, Z.q. Hou wrote:
> > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> >
> > Add PCIe Gen4 controller DT bindings of NXP Layerscape SoCs.
> >
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
> > ---
> > V2:
> >  - Change to use the layerscape-pci.txt for PCIe Gen4 controller
> >    dt-bindings
> 
> Sorry someone suggested this, but it seems there's no point in having these in
> the same file. New IP block, do a new file.

Leo, can you help comment on this? I'm not sure which one is better.

> 
> >
> >  .../bindings/pci/layerscape-pci.txt           | 57
> +++++++++++++++++++
> >  MAINTAINERS                                   |  8 +++
> >  2 files changed, 65 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > index 66df1e81e0b8..3ef8836b6e97 100644
> > --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > +++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> > @@ -1,4 +1,6 @@
> > +====================================
> >  Freescale Layerscape PCIe controller
> > +====================================
> >
> >  This PCIe host controller is based on the Synopsys DesignWare PCIe IP
> > and thus inherits all the common properties defined in designware-pcie.txt.
> > @@ -58,3 +60,58 @@ Example:
> >  				<0000 0 0 3 &gic GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
> >  				<0000 0 0 4 &gic GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
> >  	};
> > +
> > +===================================
> > +NXP Layerscape PCIe Gen4 controller
> > +===================================
> > +
> > +This PCIe controller is based on the Mobiveil PCIe IP and thus
> > +inherits all the common properties defined in mobiveil-pcie.txt.
> > +
> > +Required properties:
> > +- compatible: should contain the platform identifier such as:
> > +  "fsl,lx2160a-pcie"
> > +- reg: base addresses and lengths of the PCIe controller register blocks.
> > +  "config_axi_slave": PCIe controller registers
> > +  "csr_axi_slave": Bridge config registers
> 
> Wouldn't 'config' and 'csr' be sufficient? And these should be listed under
> reg-names.
> 
> > +- interrupts: A list of interrupt outputs of the controller. Must
> > +contain an
> > +  entry for each entry in the interrupt-names property.
> > +- interrupt-names: It could include the following entries:
> > +  "intr": The interrupt that is asserted for controller interrupts
> > +  "aer": Asserted for aer interrupt when chip support the aer interrupt
> with
> > +	 none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
> > +  "pme": Asserted for pme interrupt when chip support the pme interrupt
> with
> > +	 none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
> > +- dma-coherent: Indicates that the hardware IP block can ensure the
> > +coherency
> > +  of the data transferred from/to the IP block. This can avoid the
> > +software
> > +  cache flush/invalid actions, and improve the performance significantly.
> > +- msi-parent : See the generic MSI binding described in
> > +  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
> > +
> > +Example:
> > +
> > +	pcie@3400000 {
> > +		compatible = "fsl,lx2160a-pcie";
> > +		reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers
> */
> > +		       0x80 0x00000000 0x0 0x00001000>; /* configuration space
> */
> > +		reg-names = "csr_axi_slave", "config_axi_slave";
> 
> The order should match what's defined above.

Yes, will change the order above in next version.

> 
> Also, normally the config space would be the bigger region unless config
> accesses are windowed.

Yes, config accesses are windowed.

> 
> > +		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER
> interrupt */
> > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt
> */
> > +			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller
> interrupt */
> > +		interrupt-names = "aer", "pme", "intr";
> > +		#address-cells = <3>;
> > +		#size-cells = <2>;
> > +		device_type = "pci";
> > +		apio-wins = <8>;
> > +		ppio-wins = <8>;
> 
> If these have specific values on your h/w, please specify above.

Confirmed with our HW team that PCIe@3600000 and PCIe@3800000 have different window number, will update the window number in next version.

> 
> > +		dma-coherent;
> > +		bus-range = <0x0 0xff>;
> > +		msi-parent = <&its>;
> > +		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0
> 0x40000000>;
> > +		#interrupt-cells = <1>;
> > +		interrupt-map-mask = <0 0 0 7>;
> > +		interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109
> IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 2 &gic 0 0 GIC_SPI 110
> IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 3 &gic 0 0 GIC_SPI 111
> IRQ_TYPE_LEVEL_HIGH>,
> > +				<0000 0 0 4 &gic 0 0 GIC_SPI 112
> IRQ_TYPE_LEVEL_HIGH>;
> > +	};

Thanks,
Zhiqiang
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
index 66df1e81e0b8..3ef8836b6e97 100644
--- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
+++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
@@ -1,4 +1,6 @@ 
+====================================
 Freescale Layerscape PCIe controller
+====================================
 
 This PCIe host controller is based on the Synopsys DesignWare PCIe IP
 and thus inherits all the common properties defined in designware-pcie.txt.
@@ -58,3 +60,58 @@  Example:
 				<0000 0 0 3 &gic GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
 				<0000 0 0 4 &gic GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
 	};
+
+===================================
+NXP Layerscape PCIe Gen4 controller
+===================================
+
+This PCIe controller is based on the Mobiveil PCIe IP and thus inherits all
+the common properties defined in mobiveil-pcie.txt.
+
+Required properties:
+- compatible: should contain the platform identifier such as:
+  "fsl,lx2160a-pcie"
+- reg: base addresses and lengths of the PCIe controller register blocks.
+  "config_axi_slave": PCIe controller registers
+  "csr_axi_slave": Bridge config registers
+- interrupts: A list of interrupt outputs of the controller. Must contain an
+  entry for each entry in the interrupt-names property.
+- interrupt-names: It could include the following entries:
+  "intr": The interrupt that is asserted for controller interrupts
+  "aer": Asserted for aer interrupt when chip support the aer interrupt with
+	 none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
+  "pme": Asserted for pme interrupt when chip support the pme interrupt with
+	 none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
+- dma-coherent: Indicates that the hardware IP block can ensure the coherency
+  of the data transferred from/to the IP block. This can avoid the software
+  cache flush/invalid actions, and improve the performance significantly.
+- msi-parent : See the generic MSI binding described in
+  Documentation/devicetree/bindings/interrupt-controller/msi.txt.
+
+Example:
+
+	pcie@3400000 {
+		compatible = "fsl,lx2160a-pcie";
+		reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers */
+		       0x80 0x00000000 0x0 0x00001000>; /* configuration space */
+		reg-names = "csr_axi_slave", "config_axi_slave";
+		interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
+			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
+			     <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+		interrupt-names = "aer", "pme", "intr";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		device_type = "pci";
+		apio-wins = <8>;
+		ppio-wins = <8>;
+		dma-coherent;
+		bus-range = <0x0 0xff>;
+		msi-parent = <&its>;
+		ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>;
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 2 &gic 0 0 GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 3 &gic 0 0 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
+				<0000 0 0 4 &gic 0 0 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 084d225583e0..b59763e23392 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11405,6 +11405,14 @@  L:	linux-arm-kernel@lists.infradead.org
 S:	Maintained
 F:	drivers/pci/controller/dwc/*layerscape*
 
+PCI DRIVER FOR NXP LAYERSCAPE GEN4 CONTROLLER
+M:	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+L:	linux-pci@vger.kernel.org
+L:	linux-arm-kernel@lists.infradead.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/layerscape-pci.txt
+F:	drivers/pci/controller/mobibeil/pci-layerscape-gen4.c
+
 PCI DRIVER FOR GENERIC OF HOSTS
 M:	Will Deacon <will.deacon@arm.com>
 L:	linux-pci@vger.kernel.org