media: dt-bindings: add bindings for i.MX7 media driver

Freescale i.MX7 CMOS Sensor Interface

=====================================

csi node

--------

This is device node for the CMOS Sensor Interface (CSI) which enables the chip

to connect directly to external CMOS image sensors.

Required properties:

- compatible    : "fsl,imx7-csi";

- reg           : base address and length of the register set for the device;

- interrupts    : should contain CSI interrupt;

- clocks        : list of clock specifiers, see

        Documentation/devicetree/bindings/clock/clock-bindings.txt for details;

- clock-names   : must contain "axi", "mclk" and "dcic" entries, matching

                 entries in the clock property;

The device node shall contain one 'port' child node with one child 'endpoint'

node, according to the bindings defined in:

Documentation/devicetree/bindings/media/video-interfaces.txt.

In the following example a remote endpoint is a video multiplexer.

example:

                csi: csi@30710000 {

                        #address-cells = <1>;

                        #size-cells = <0>;

                        compatible = "fsl,imx7-csi";

                        reg = <0x30710000 0x10000>;

                        interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;

                        clocks = <&clks IMX7D_CLK_DUMMY>,

                                        <&clks IMX7D_CSI_MCLK_ROOT_CLK>,

                                        <&clks IMX7D_CLK_DUMMY>;

                        clock-names = "axi", "mclk", "dcic";

                        port {

                                csi_from_csi_mux: endpoint {

                                        remote-endpoint = <&csi_mux_to_csi>;

                                };

                        };

                };

Freescale i.MX7 Mipi CSI2

=========================

mipi_csi2 node

--------------

This is the device node for the MIPI CSI-2 receiver core in i.MX7 SoC. It is

compatible with previous version of Samsung D-phy.

Required properties:

- compatible    : "fsl,imx7-mipi-csi2";

- reg           : base address and length of the register set for the device;

- interrupts    : should contain MIPI CSIS interrupt;

- clocks        : list of clock specifiers, see

        Documentation/devicetree/bindings/clock/clock-bindings.txt for details;

- clock-names   : must contain "pclk", "wrap" and "phy" entries, matching

                  entries in the clock property;

- power-domains : a phandle to the power domain, see

          Documentation/devicetree/bindings/power/power_domain.txt for details.

- reset-names   : should include following entry "mrst";

- resets        : a list of phandle, should contain reset entry of

                  reset-names;

- phy-supply    : from the generic phy bindings, a phandle to a regulator that

	          provides power to MIPI CSIS core;

Optional properties:

- clock-frequency : The IP's main (system bus) clock frequency in Hz, default

		    value when this property is not specified is 166 MHz;

- fsl,csis-hs-settle : differential receiver (HS-RX) settle time;

The device node should contain two 'port' child nodes with one child 'endpoint'

node, according to the bindings defined in:

 Documentation/devicetree/bindings/ media/video-interfaces.txt.

 The following are properties specific to those nodes.

port node

---------

- reg		  : (required) can take the values 0 or 1, where 0 shall be

                     related to the sink port and port 1 shall be the source

                     one;

endpoint node

-------------

- data-lanes    : (required) an array specifying active physical MIPI-CSI2

		    data input lanes and their mapping to logical lanes; this

                    shall only be applied to port 0 (sink port), the array's

                    content is unused only its length is meaningful,

                    in this case the maximum length supported is 2;

example:

        mipi_csi: mipi-csi@30750000 {

                #address-cells = <1>;

                #size-cells = <0>;

                compatible = "fsl,imx7-mipi-csi2";

                reg = <0x30750000 0x10000>;

                interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;

                clocks = <&clks IMX7D_IPG_ROOT_CLK>,

                                <&clks IMX7D_MIPI_CSI_ROOT_CLK>,

                                <&clks IMX7D_MIPI_DPHY_ROOT_CLK>;

                clock-names = "pclk", "wrap", "phy";

                clock-frequency = <166000000>;

                power-domains = <&pgc_mipi_phy>;

                phy-supply = <&reg_1p0d>;

                resets = <&src IMX7_RESET_MIPI_PHY_MRST>;

                reset-names = "mrst";

                fsl,csis-hs-settle = <3>;

                port@0 {

                        reg = <0>;

                        mipi_from_sensor: endpoint {

                                remote-endpoint = <&ov2680_to_mipi>;

                                data-lanes = <1>;

                        };

                };

                port@1 {

                        reg = <1>;

                        mipi_vc0_to_csi_mux: endpoint {

                                remote-endpoint = <&csi_mux_from_mipi_vc0>;

                        };

                };

        };