* Qualcomm Technologies, Inc. MSM Camera CPAS

The MSM camera CPAS device provides dependency definitions for
enabling Camera CPAS HW and provides the Client definitions
for all HW blocks that use CPAS driver for BW voting. These
definitions consist of various properties that define the list
of clients supported, AHB, AXI master-slave IDs used for BW
voting.

=======================
Required Node Structure
=======================
The camera CPAS device must be described in four levels of device nodes. The
first level describes the overall CPAS device. Within it, second level nodes
describe the list of AXI ports that map different clients for AXI BW voting.
Third level nodes describe the details of each AXI port having name, mnoc,
camnoc AXI Bus information. Fourth level nodes describe the details of Bus
master-slave IDs, ab, ib values for mnoc, camnoc bus interface.

==================================
First Level Node - CAM CPAS device
==================================
- cell-index
  Usage: required
  Value type: <u32>
  Definition: Node instance number.

- compatible
  Usage: required
  Value type: <string>
  Definition: Should be "qcom,cam-cpas".

- label
  Usage: required
  Value type: <string>
  Definition: Should be "cpas".

- arch-compat
  Usage: required
  Value type: <string>
  Definition: Should be "cpas_top" or "camss_top".

- reg-names
  Usage: required
  Value type: <string>
  Definition: Name of the register resources.

- reg
  Usage: required
  Value type: <u32>
  Definition: Register values.

- reg-cam-base
  Usage: required
  Value type: <u32>
  Definition: Offset of the register space compared to
	to Camera base register space.

- interrupt-names
  Usage: optional
  Value type: <string>
  Definition: Name of the interrupt.

- interrupts
  Usage: optional
  Value type: <u32>
  Definition: Interrupt associated with CAMNOC HW.

- qcom,cpas-hw-ver
  Usage: required
  Value type: <u32>
  Definition: CAM HW Version information.

- camnoc-axi-min-ib-bw
  Usage: optional
  Value type: <u64>
  Definition: Min camnoc axi bw for the given target.

- regulator-names
  Usage: required
  Value type: <string>
  Definition: Name of the regulator resources for CPAS HW.

- camss-vdd-supply
  Usage: required
  Value type: <phandle>
  Definition: Regulator reference corresponding to the names listed
	in "regulator-names".

- clock-names
  Usage: required
  Value type: <string>
  Definition: List of clock names required for CPAS HW.

- clocks
  Usage: required
  Value type: <phandle>
  Definition: List of clocks used for CPAS HW.

- src-clock-name
  Usage: required
  Value type: <string>
  Definition: Source clock name.

- clock-rates
  Usage: required
  Value type: <u32>
  Definition: List of clocks rates.

- clock-cntl-level
  Usage: required
  Value type: <string>
  Definition: List of strings corresponds clock-rates levels.
  Supported strings: minsvs, lowsvs, svs, svs_l1, nominal, turbo.

- control-camnoc-axi-clk
  Usage: optional
  Value type: <empty>
  Definition: Bool property specifying whether to control camnoc axi
              clock from cpas driver.

- camnoc-bus-width
  Usage: required if control-camnoc-axi-clk is enabled
  Value type: <u32>
  Definition: camnoc bus width.

- camnoc-axi-clk-bw-margin-perc
  Usage: optional
  Value type: <u32>
  Definition: Percentage value to be added to camnoc bw while calculating
              camnoc axi clock frequency.

- qcom,msm-bus,name
- qcom,msm-bus,num-cases
- qcom,msm-bus,num-paths
- qcom,msm-bus,vectors-KBps
  Please refer Documentation/devicetree/bindings/arm/msm/msm_bus.txt
  for the properties above.

- vdd-corners
  Usage: required
  Value type: <u32>
  Definition: List of vdd corners to map for ahb level.

- vdd-corner-ahb-mapping
  Usage: required
  Value type: <string>
  Definition: List of ahb level strings corresponds to vdd-corners.
  Supported strings: suspend, svs, nominal, turbo

- client-id-based
  Usage: required
  Value type: <empty>
  Definition: Bool property specifying whether CPAS clients are ID based.

- client-names
  Usage: required
  Value type: <string>
  Definition: List of Clients supported by CPAS.

- client-axi-port-names
  Usage: required
  Value type: <string>
  Definition: AXI Port name for each client.

- client-bus-camnoc-based
  Usage: required
  Value type: <empty>
  Definition: Bool property specifying whether Clients are connected
	through CAMNOC for AXI access.

- qcom,cam-cx-ipeak:
  Usage: optional
  Value type: <phandle bit>
	phandle - phandle of CX Ipeak device node
	bit     - Every bit corresponds to a client of CX Ipeak
  Definition: CX Ipeak is a mitigation scheme which throttles camera frequency
	if all the clients are running at their respective threshold
	frequencies to limit CX peak current.
	driver in the relevant register.

===================================================================
Third Level Node - CAM AXI Port properties
===================================================================
- qcom,axi-port-name
  Usage: required
  Value type: <string>
  Definition: Name of the AXI Port.

- ib-bw-voting-needed
  Usage: optional
  Value type: <bool>
  Definition: Determines if this port votes for ib bw dynamically.

===================================================================
Fourth Level Node - CAM AXI Bus properties
===================================================================

- qcom,msm-bus,name
- qcom,msm-bus,num-cases
- qcom,msm-bus,num-paths
- qcom,msm-bus,vectors-KBps
  Please refer Documentation/devicetree/bindings/arm/msm/msm_bus.txt
  for the properties above.

- qcom,msm-bus-vector-dyn-vote
  Usage: optional
  Value type: <empty>
  Definition: Bool property specifying whether this bus client
	is dynamic vote based.

Example:

	qcom,cam-cpas@ac40000 {
		cell-index = <0>;
		compatible = "qcom,cam-cpas";
		label = "cpas";
		arch-compat = "cpas_top";
		status = "ok";
		reg-names = "cam_cpas_top", "cam_camnoc";
		reg = <0xac40000 0x1000>,
			<0xac42000 0x5000>;
		reg-cam-base = <0x40000 0x42000>;
		interrupt-names = "cpas_camnoc";
		interrupts = <0 459 0>;
		qcom,cpas-hw-ver = <0x170100>; /* Titan v170 v1.0.0 */
		regulator-names = "camss-vdd";
		camss-vdd-supply = <&titan_top_gdsc>;
		clock-names = "gcc_ahb_clk",
			"gcc_axi_clk",
			"soc_ahb_clk",
			"cpas_ahb_clk",
			"slow_ahb_clk_src",
			"camnoc_axi_clk";
		clocks = <&clock_gcc GCC_CAMERA_AHB_CLK>,
			<&clock_gcc GCC_CAMERA_AXI_CLK>,
			<&clock_camcc CAM_CC_SOC_AHB_CLK>,
			<&clock_camcc CAM_CC_CPAS_AHB_CLK>,
			<&clock_camcc CAM_CC_SLOW_AHB_CLK_SRC>,
			<&clock_camcc CAM_CC_CAMNOC_AXI_CLK>;
		src-clock-name = "slow_ahb_clk_src";
		clock-rates = <0 0 0 0 80000000 0>;
		clock-cntl-level = "turbo";
		qcom,cam-cx-ipeak = <&cx_ipeak_lm 2>;
		control-camnoc-axi-clk;
		camnoc-bus-width = <32>;
		camnoc-axi-clk-bw-margin-perc = <10>;
		qcom,msm-bus,name = "cam_ahb";
		qcom,msm-bus,num-cases = <4>;
		qcom,msm-bus,num-paths = <1>;
		qcom,msm-bus,vectors-KBps =
			<MSM_BUS_MASTER_AMPSS_M0
			MSM_BUS_SLAVE_CAMERA_CFG 0 0>,
			<MSM_BUS_MASTER_AMPSS_M0
			MSM_BUS_SLAVE_CAMERA_CFG 0 300000>,
			<MSM_BUS_MASTER_AMPSS_M0
			MSM_BUS_SLAVE_CAMERA_CFG 0 640000>,
			<MSM_BUS_MASTER_AMPSS_M0
			MSM_BUS_SLAVE_CAMERA_CFG 0 640000>;
		client-id-based;
		client-names =
			"ife0", "ife1", "ife2", "ipe0",
			"ipe1", "cam-cdm-intf0", "cpas-cdm0", "bps0",
			"icp0", "jpeg-dma0", "jpeg0", "fd0";
		client-axi-port-names =
			"cam_hf_1", "cam_hf_2", "cam_hf_2", "cam_sf_1",
			"cam_sf_1", "cam_sf_1", "cam_sf_1", "cam_sf_1",
			"cam_sf_1", "cam_sf_1", "cam_sf_1", "cam_sf_1";
		client-bus-camnoc-based;
		qcom,axi-port-list {
			qcom,axi-port1 {
				qcom,axi-port-name = "cam_hf_1";
				qcom,axi-port-mnoc {
					qcom,msm-bus,name = "cam_hf_1_mnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
				qcom,axi-port-camnoc {
					qcom,msm-bus,name = "cam_hf_1_camnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
			};
			qcom,axi-port2 {
				qcom,axi-port-name = "cam_hf_2";
				qcom,axi-port-mnoc {
					qcom,msm-bus,name = "cam_hf_2_mnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
				qcom,axi-port-camnoc {
					qcom,msm-bus,name = "cam_hf_1_camnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_HF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
			};
			qcom,axi-port3 {
				qcom,axi-port-name = "cam_sf_1";
				qcom,axi-port-mnoc {
					qcom,msm-bus,name = "cam_sf_1_mnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_SF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_SF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
				qcom,axi-port-camnoc {
					qcom,msm-bus,name = "cam_sf_1_camnoc";
					qcom,msm-bus-vector-dyn-vote;
					qcom,msm-bus,num-cases = <2>;
					qcom,msm-bus,num-paths = <1>;
					qcom,msm-bus,vectors-KBps =
						<MSM_BUS_MASTER_CAMNOC_SF
						MSM_BUS_SLAVE_EBI_CH0 0 0>,
						<MSM_BUS_MASTER_CAMNOC_SF
						MSM_BUS_SLAVE_EBI_CH0 0 0>;
				};
			};
		};
	};