linux-kernel - Re: [PATCH v2 01/19] doc: DT: camss: Binding document for Qualcomm Camera subsystem driver

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Message-ID: <20170623204153.jpjecbzgnaptypbu@rob-hp-laptop>
Date:   Fri, 23 Jun 2017 15:41:53 -0500
From:   Rob Herring <robh@...nel.org>
To:     Todor Tomov <todor.tomov@...aro.org>
Cc:     mchehab@...nel.org, hans.verkuil@...co.com, javier@....samsung.com,
        s.nawrocki@...sung.com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 01/19] doc: DT: camss: Binding document for Qualcomm
 Camera subsystem driver

On Mon, Jun 19, 2017 at 05:48:21PM +0300, Todor Tomov wrote:
> Add DT binding document for Qualcomm Camera subsystem driver.

"dt-bindings: media: ..." for the subject please.

> 
> CC: Rob Herring <robh+dt@...nel.org>
> CC: devicetree@...r.kernel.org
> Signed-off-by: Todor Tomov <todor.tomov@...aro.org>
> ---
>  .../devicetree/bindings/media/qcom,camss.txt       | 196 +++++++++++++++++++++
>  1 file changed, 196 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/qcom,camss.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/qcom,camss.txt b/Documentation/devicetree/bindings/media/qcom,camss.txt
> new file mode 100644
> index 0000000..5213b03
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/qcom,camss.txt
> @@ -0,0 +1,196 @@
> +Qualcomm Camera Subsystem
> +
> +* Properties
> +
> +- compatible:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Should contain:
> +		- "qcom,msm8916-camss"

Okay if it is one node, but I'd like to see some agreement from other QC 
folks that 1 node is appropriate.

> +- reg:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: Register ranges as listed in the reg-names property.
> +- reg-names:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Should contain the following entries:
> +		- "csiphy0"
> +		- "csiphy0_clk_mux"
> +		- "csiphy1"
> +		- "csiphy1_clk_mux"
> +		- "csid0"
> +		- "csid1"
> +		- "ispif"
> +		- "csi_clk_mux"
> +		- "vfe0"
> +- interrupts:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: Interrupts as listed in the interrupt-names property.
> +- interrupt-names:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Should contain the following entries:
> +		- "csiphy0"
> +		- "csiphy1"
> +		- "csid0"
> +		- "csid1"
> +		- "ispif"
> +		- "vfe0"
> +- power-domains:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A phandle and power domain specifier pairs to the
> +		    power domain which is responsible for collapsing
> +		    and restoring power to the peripheral.
> +- clocks:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A list of phandle and clock specifier pairs as listed
> +		    in clock-names property.
> +- clock-names:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Should contain the following entries:
> +		- "camss_top_ahb_clk"
> +		- "ispif_ahb_clk"
> +		- "csiphy0_timer_clk"
> +		- "csiphy1_timer_clk"
> +		- "csi0_ahb_clk"
> +		- "csi0_clk"
> +		- "csi0_phy_clk"
> +		- "csi0_pix_clk"
> +		- "csi0_rdi_clk"
> +		- "csi1_ahb_clk"
> +		- "csi1_clk"
> +		- "csi1_phy_clk"
> +		- "csi1_pix_clk"
> +		- "csi1_rdi_clk"
> +		- "camss_ahb_clk"
> +		- "camss_vfe_vfe_clk"
> +		- "camss_csi_vfe_clk"
> +		- "iface_clk"
> +		- "bus_clk"

"_clk" is redundant.

> +- vdda-supply:
> +	Usage: required
> +	Value type: <phandle>
> +	Definition: A phandle to voltage supply for CSI2.
> +- iommus:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A list of phandle and IOMMU specifier pairs.
> +
> +* Nodes
> +
> +- ports:
> +	Usage: required
> +	Definition: As described in video-interfaces.txt in same directory.
> +	Properties:
> +		- reg:
> +			Usage: required
> +			Value type: <u32>
> +			Definition: Selects CSI2 PHY interface - PHY0 or PHY1.
> +	Endpoint node properties:
> +		- clock-lanes:
> +			Usage: required
> +			Value type: <u32>
> +			Definition: The clock lane.
> +		- data-lanes:
> +			Usage: required
> +			Value type: <prop-encoded-array>
> +			Definition: An array of data lanes.
> +		- qcom,settle-cnt:
> +			Usage: required
> +			Value type: <u32>
> +			Definition: The settle count parameter for CSI PHY.
> +
> +* An Example
> +
> +	camss: camss@...0000 {
> +		compatible = "qcom,msm8916-camss";
> +		reg = <0x1b0ac00 0x200>,
> +			<0x1b00030 0x4>,
> +			<0x1b0b000 0x200>,
> +			<0x1b00038 0x4>,
> +			<0x1b08000 0x100>,
> +			<0x1b08400 0x100>,
> +			<0x1b0a000 0x500>,
> +			<0x1b00020 0x10>,
> +			<0x1b10000 0x1000>;
> +		reg-names = "csiphy0",
> +			"csiphy0_clk_mux",
> +			"csiphy1",
> +			"csiphy1_clk_mux",
> +			"csid0",
> +			"csid1",
> +			"ispif",
> +			"csi_clk_mux",
> +			"vfe0";
> +		interrupts = <GIC_SPI 78 0>,
> +			<GIC_SPI 79 0>,
> +			<GIC_SPI 51 0>,
> +			<GIC_SPI 52 0>,
> +			<GIC_SPI 55 0>,
> +			<GIC_SPI 57 0>;
> +		interrupt-names = "csiphy0",
> +			"csiphy1",
> +			"csid0",
> +			"csid1",
> +			"ispif",
> +			"vfe0";
> +		power-domains = <&gcc VFE_GDSC>;
> +		clocks = <&gcc GCC_CAMSS_TOP_AHB_CLK>,
> +			<&gcc GCC_CAMSS_ISPIF_AHB_CLK>,
> +			<&gcc GCC_CAMSS_CSI0PHYTIMER_CLK>,
> +			<&gcc GCC_CAMSS_CSI1PHYTIMER_CLK>,
> +			<&gcc GCC_CAMSS_CSI0_AHB_CLK>,
> +			<&gcc GCC_CAMSS_CSI0_CLK>,
> +			<&gcc GCC_CAMSS_CSI0PHY_CLK>,
> +			<&gcc GCC_CAMSS_CSI0PIX_CLK>,
> +			<&gcc GCC_CAMSS_CSI0RDI_CLK>,
> +			<&gcc GCC_CAMSS_CSI1_AHB_CLK>,
> +			<&gcc GCC_CAMSS_CSI1_CLK>,
> +			<&gcc GCC_CAMSS_CSI1PHY_CLK>,
> +			<&gcc GCC_CAMSS_CSI1PIX_CLK>,
> +			<&gcc GCC_CAMSS_CSI1RDI_CLK>,
> +			<&gcc GCC_CAMSS_AHB_CLK>,
> +			<&gcc GCC_CAMSS_VFE0_CLK>,
> +			<&gcc GCC_CAMSS_CSI_VFE0_CLK>,
> +			<&gcc GCC_CAMSS_VFE_AHB_CLK>,
> +			<&gcc GCC_CAMSS_VFE_AXI_CLK>;
> +		clock-names = "camss_top_ahb_clk",
> +			"ispif_ahb_clk",
> +			"csiphy0_timer_clk",
> +			"csiphy1_timer_clk",
> +			"csi0_ahb_clk",
> +			"csi0_clk",
> +			"csi0_phy_clk",
> +			"csi0_pix_clk",
> +			"csi0_rdi_clk",
> +			"csi1_ahb_clk",
> +			"csi1_clk",
> +			"csi1_phy_clk",
> +			"csi1_pix_clk",
> +			"csi1_rdi_clk",
> +			"camss_ahb_clk",
> +			"camss_vfe_vfe_clk",
> +			"camss_csi_vfe_clk",
> +			"iface_clk",
> +			"bus_clk";
> +		vdda-supply = <&pm8916_l2>;
> +		iommus = <&apps_iommu 3>;
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			port@0 {
> +				reg = <0>;
> +				csiphy0_ep: endpoint {
> +					clock-lanes = <1>;
> +					data-lanes = <0 2>;
> +					qcom,settle-cnt = <0xe>;
> +					remote-endpoint = <&ov5645_ep>;
> +				};
> +			};
> +		};
> +	};
> -- 
> 1.9.1
>