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Date: Tue, 23 May 2017 09:16:41 -0500
From: Rob Herring <robh@...nel.org>
To: Song Xiaowei <songxiaowei@...ilicon.com>
Cc: wangzhou1@...ilicon.com, gabriele.paoloni@...wei.com,
bhelgaas@...gle.com, mark.rutland@....com, xuwei5@...ilicon.com,
catalin.marinas@....com, will.deacon@....com,
linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, puck.chen@...ilicon.com,
guodong.xu@...aro.org, wangbinghui@...ilicon.com,
suzhuangluan@...ilicon.com
Subject: Re: [Patch v3 1/3] arm64: dts: hi3660: add pcie node
On Thu, May 18, 2017 at 03:49:46PM +0800, Song Xiaowei wrote:
> Add PCIe node for hi3660, and add binding documentation.
>
> Cc: Guodong Xu <guodong.xu@...aro.org>
> Signed-off-by: Song Xiaowei <songxiaowei@...ilicon.com>
> ---
> .../devicetree/bindings/pci/hisilicon-pcie.txt | 52 ++++++++++++++++++++++
> arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 31 +++++++++++++
These should be separate patches.
> 2 files changed, 83 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/pci/hisilicon-pcie.txt b/Documentation/devicetree/bindings/pci/hisilicon-pcie.txt
> index a339dbb15493..71491178c86c 100644
> --- a/Documentation/devicetree/bindings/pci/hisilicon-pcie.txt
> +++ b/Documentation/devicetree/bindings/pci/hisilicon-pcie.txt
> @@ -85,3 +85,55 @@ Example:
> 0x0 0 0 4 &mbigen_pcie0 650 4>;
> status = "ok";
> };
> +
> +
> +
Why is this in the same document? If there's nothing shared, then just
do a separate doc for each SoC.
> +HiSilicon Kirin SoC PCIe host DT description
Isn't Kirin the 6220?
> +
> +Kirin PCIe host controller is also based on Designware PCI core.
> +It shares common functions with PCIe Designware core driver and inherits
> +common properties defined in
> +Documentation/devicetree/bindings/pci/designware-pci.txt.
> +
> +Additional properties are described here:
> +
> +Required properties
> +- compatible: Should contain "hisilicon,kirin-pcie".
Use the part number rather than the code name.
> +- reg: Should contain rc_dbi, apb, phy, config registers location and length.
> +- reg-names: Must include the following entries:
> + "dbi": controller configuration registers;
> + "apb": apb Ctrl register;
> + "phy": apb PHY register;
Perhaps the phy should be a separate node and use the phy binding?
> + "config": PCIe configuration space registers.
> +- reset-gpio: perst assert/deassert gpio
reset-gpios
> +
> +Optional properties:
> +- status: Either "ok" or "disabled".
Don't need to document this.
> +
> +Kirin960 Example:
> + kirin_pcie@...00000 {
pcie@...
Build the dts with W=1 or W=2. dtc will warn for this now.
> + compatible = "hisilicon,kirin-pcie";
> + reg = <0x0 0xf4000000 0x0 0x1000>, <0x0 0xff3fe000 0x0 0x1000>,
> + <0x0 0xf3f20000 0x0 0x40000>, <0x0 0xF5000000 0 0x2000>;
> + reg-names = "dbi","apb","phy", "config";
> + bus-range = <0x0 0x1>;
> + #address-cells = <3>;
> + #size-cells = <2>;
> + device_type = "pci";
> + ranges = <0x02000000 0x0 0x00000000 0x0 0xf6000000 0x0 0x2000000>;
> + num-lanes = <1>;
> + #interrupt-cells = <1>;
> + interrupt-map-mask = <0xf800 0 0 7>;
> + interrupt-map = <0x0 0 0 2 &gic 0 0 0 283 4>,
> + <0x0 0 0 3 &gic 0 0 0 284 4>,
> + <0x0 0 0 4 &gic 0 0 0 285 4>;
> + clocks = <&crg_ctrl HI3660_PCIEPHY_REF>,
> + <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>,
> + <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>,
> + <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>,
> + <&crg_ctrl HI3660_ACLK_GATE_PCIE>;
> + clock-names = "pcie_phy_ref", "pcie_aux",
> + "pcie_apb_phy", "pcie_apb_sys", "pcie_aclk";
> + reset-gpio = <&gpio11 1 0 >;
> + status = "ok";
Don't show status in examples.
> + };
> diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> index 3983086bd67b..2406a54947df 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> @@ -156,5 +156,36 @@
> clock-names = "uartclk", "apb_pclk";
> status = "disabled";
> };
> +
> + kirin_pcie@...00000 {
> + compatible = "hisilicon,kirin-pcie";
> + reg = <0x0 0xf4000000 0x0 0x1000>,
> + <0x0 0xff3fe000 0x0 0x1000>,
> + <0x0 0xf3f20000 0x0 0x40000>,
> + <0x0 0xF5000000 0x0 0x2000>;
> + reg-names = "dbi", "apb", "phy", "config";
> + bus-range = <0x0 0x1>;
> + #address-cells = <3>;
> + #size-cells = <2>;
> + device_type = "pci";
> + ranges = <0x02000000 0x0 0x00000000 0x0
> + 0xf6000000 0x0 0x2000000>;
> + num-lanes = <1>;
> + #interrupt-cells = <1>;
> + interrupt-map-mask = <0xf800 0 0 7>;
> + interrupt-map = <0x0 0 0 1 &gic 0 0 0 282 4>,
> + <0x0 0 0 2 &gic 0 0 0 283 4>,
> + <0x0 0 0 3 &gic 0 0 0 284 4>,
> + <0x0 0 0 4 &gic 0 0 0 285 4>;
> + clocks = <&crg_ctrl HI3660_PCIEPHY_REF>,
> + <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>,
> + <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>,
> + <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>,
> + <&crg_ctrl HI3660_ACLK_GATE_PCIE>;
> + clock-names = "pcie_phy_ref", "pcie_aux",
> + "pcie_apb_phy", "pcie_apb_sys", "pcie_aclk";
> + reset-gpio = <&gpio11 1 0 >;
> + status = "ok";
> + };
> };
> };
> --
> 2.11.GIT
>
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