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From: Rob Herring <robh@kernel.org>
To: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	linux-pci@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
	Heiko Stuebner <heiko@sntech.de>,
	Doug Anderson <dianders@chromium.org>,
	Wenrui Li <wenrui.li@rock-chips.com>,
	devicetree@vger.kernel.org
Subject: Re: [PATCH v2 1/2] Documentation: bindings: add dt doc for Rockchip PCIe controller
Date: Wed, 8 Jun 2016 15:44:48 -0500	[thread overview]
Message-ID: <20160608204448.GA26861@rob-hp-laptop> (raw)
In-Reply-To: <1465373117-823-1-git-send-email-shawn.lin@rock-chips.com>

On Wed, Jun 08, 2016 at 04:05:17PM +0800, Shawn Lin wrote:
> This patch adds a binding that describes the Rockchip PCIe controller
> found on Rockchip SoCs PCIe interface.
> 
> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
> 
> ---
> 
> Changes in v2:
> - fix lots clk/reset stuff suggested by Heiko
> - remove msi-parent and add msi-map suggested by Marc
> - drop phy related stuff
> - some others minor fixes
> 
>  .../devicetree/bindings/pci/rockchip-pcie.txt      | 86 ++++++++++++++++++++++
>  1 file changed, 86 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/rockchip-pcie.txt b/Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> new file mode 100644
> index 0000000..eb92e29
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/rockchip-pcie.txt
> @@ -0,0 +1,86 @@
> +* Rockchip AXI PCIe Root Port Bridge DT description
> +
> +Required properties:
> +- #address-cells: Address representation for root ports, set to <3>
> +- #size-cells: Size representation for root ports, set to <2>
> +- #interrupt-cells: specifies the number of cells needed to encode an
> +		interrupt source. The value must be 1.
> +- compatible: Should contain "rockchip,rk3399-pcie"
> +- reg: Two register ranges as listed in the reg-names property
> +- reg-names: Must include the following names
> +	- "axi-base"
> +	- "apb-base"
> +- clocks: Must contain an entry for each entry in clock-names.
> +		See ../clocks/clock-bindings.txt for details.
> +- clock-names: Must include the following entries:
> +	- "aclk"
> +	- "aclk-perf"
> +	- "hclk"
> +	- "pm"
> +- phys: From PHY bindings: Phandle for the Generic PHY for PCIe.
> +- phy-names:  MUST be "pcie-phy".

phy-names is kind of pointless for 1 phy.

> +- interrupts: Three interrupt entries must be specified.
> +- interrupt-names: Must include the following names
> +	- "sys"
> +	- "legacy"
> +	- "client"
> +- resets: Must contain five entries for each entry in reset-names.
> +	   See ../reset/reset.txt for details.
> +- reset-names: Must include the following names
> +	- "core"
> +	- "mgmt"
> +	- "mgmt-sticky"
> +	- "pipe"
> +- pinctrl-names : The pin control state names
> +- pinctrl-0: The "default" pinctrl state
> +- interrupt-map-mask and interrupt-map: standard PCI properties
> +- interrupt-controller: identifies the node as an interrupt controller
> +
> +Optional Property:
> +- ep-gpios: contain the entry for pre-reset gpio
> +- num-lanes: number of lanes to use
> +- vpcie3v3-supply: The phandle to the 3.3v regulator to use for pcie. If this
> +  is specified we'll defer probe until we can find this regulator.
> +- vpcie1v8-supply: The phandle to the 1.8v regulator to use for pcie. If this
> +  is specified we'll defer probe until we can find this regulator.
> +- vpcie0v9-supply: The phandle to the 0.9v regulator to use for pcie. If this
> +  is specified we'll defer probe until we can find this regulator.
> +
> +Example:
> +
> +pcie0: pcie@f8000000 {
> +	compatible = "rockchip,rk3399-pcie";
> +	#address-cells = <3>;
> +	#size-cells = <2>;
> +	clocks = <&cru ACLK_PCIE>, <&cru ACLK_PERF_PCIE>,
> +		 <&cru PCLK_PCIE>;
> +	clock-names = "aclk", "aclk-perf",
> +		      "hclk";
> +	bus-range = <0x0 0x1>;
> +	interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>,
> +		     <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
> +	interrupt-names: "sys", "legacy", "client";
> +	assigned-clocks = <&cru SCLK_PCIEPHY_REF>;
> +	assigned-clock-parents = <&cru SCLK_PCIEPHY_REF100M>;
> +	assigned-clock-rates = <100000000>;
> +	ep-gpios = <&gpio3 13 GPIO_ACTIVE_HIGH>;
> +	ranges = < 0x82000000 0 0xfa000000 0x0 0xfa000000 0 0x600000
> +		   0x81000000 0 0xfa600000 0x0 0xfa600000 0 0x100000 >;

No 64-bit memory space?

> +	num-lanes = <4>;
> +	reg = < 0x0 0xf8000000 0x0 0x2000000 >, < 0x0 0xfd000000 0x0 0x1000000 >;
> +	reg-name = "axi-base", "apb-base";
> +	resets = <&cru SRST_PCIEPHY>, <&cru SRST_PCIE_CORE>, <&cru SRST_PCIE_MGMT>,
> +		 <&cru SRST_PCIE_MGMT_STICKY>, <&cru SRST_PCIE_PIPE>;
> +	reset-names = "core", "mgmt", "mgmt-sticky", "pipe";
> +	phys = <&pcie_phy>;
> +	phy-names = "pcie-phy";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pcie_clkreq>;
> +	#interrupt-cells = <1>;
> +	interrupt-controller;
> +	interrupt-map-mask = <0 0 0 7>;
> +	interrupt-map = <0 0 0 1 &pcie0 1>,
> +			<0 0 0 2 &pcie0 2>,
> +			<0 0 0 3 &pcie0 3>,
> +			<0 0 0 4 &pcie0 4>;
> +};
> -- 
> 2.3.7
> 
> 

  parent reply	other threads:[~2016-06-08 20:44 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-08  8:05 Shawn Lin
2016-06-08  9:24 ` Marc Zyngier
2016-06-08 20:44 ` Rob Herring [this message]
2016-06-12  1:42   ` Shawn Lin
2016-06-10  4:01 ` Doug Anderson
2016-06-12  1:34   ` Shawn Lin
2016-06-10  7:32 ` Marc Zyngier
2016-06-16 15:31   ` Doug Anderson

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