linux-kernel - Re: [RFC PATCH 5/6] Documentation: pci: add the exynos5433-pcie binding

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Date:   Tue, 27 Dec 2016 18:19:16 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jaehoon Chung <jh80.chung@...sung.com>
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        bhelgaas@...gle.com, robh+dt@...nel.org, mark.rutland@....com,
        kgene@...nel.org, krzk@...nel.org, javier@....samsung.com,
        kishon@...com, will.deacon@....com, catalin.marinas@....com,
        cpgs@...sung.com
Subject: Re: [RFC PATCH 5/6] Documentation: pci: add the exynos5433-pcie
 binding

On Mon, Dec 26, 2016 at 02:20:28PM +0900, Jaehoon Chung wrote:
> Signed-off-by: Jaehoon Chung <jh80.chung@...sung.com>
> ---
>  .../devicetree/bindings/pci/exynos5433-pcie.txt    | 36 ++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/exynos5433-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/exynos5433-pcie.txt b/Documentation/devicetree/bindings/pci/exynos5433-pcie.txt
> new file mode 100644
> index 0000000..932a847
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/exynos5433-pcie.txt
> @@ -0,0 +1,36 @@
> +* Samsung Exynos5433 PCIe interface
> +
> +This PCIe host controller is based on the Synopsis Designware PCIe IP

Synopsys.

> +and thus inherits all the common properties defined in designware-pcie.txt.
> +
> +Required properties:
> +- compatible: "samsung,exynos5433-pcie"
> +- reg: base addresses and lengths of the pcie controller,
> +	the phy controller, additional register for the phy controller.

You mentioned three regs but the example contains four of them. Is the
config comming from snps,dw-pcie?

> +- reg-names: Must be "elbi", "phy" and "dbi" for each regs

Again, three here, four in example.

> +- interrupt-names: Must be "intr" for legacy interrupt pin.
> +
> +Other common properites refer to
> +	Documentation/devicetree/binding/pci/designware-pcie.txt
> +
> +Example:
> +
> +	pcie: pcie@...00000 {
> +		compatible ="samsung,exynos5433-pcie", "snps,dw-pcie";
                            ^
			    space needed
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +		device_type = "pci";
> +		interrupts = <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-names = "intr";
> +		clocks = <&cmu_fsys CLK_PCIE>, <&cmu_fsys CLK_PCLK_PCIE_PHY>;
> +		clock-names = "pcie", "pcie_bus";
> +		num-lanes = <1>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pcie_bus>;
> +		reg = <0x156b0000 0x1000>, <0x15680000 0x1000>,
> +		    <0x15700000 0x1000>, <0x0c000000 0x1000>;

Indentation here looks wrong. You indented it with spaces after tabs...
but not to align with line before.

Beside that, fine with me:
Acked-by: Krzysztof Kozlowski <krzk@...nel.org>

Best regards,
Krzysztof


> +		reg-names = "elbi", "phy", "dbi", "config";
> +		ranges = <0x81000000 0 0	  0x0c001000 0 0x00010000
> +			  0x82000000 0 0x0c011000 0x0c011000 0 0x3feefff>;
> +		status = "disabled";
> +	};
> -- 
> 2.10.2
>