Qualcomm Hexagon Peripheral Image Loader

This document defines the binding for a component that loads and boots firmware
on the Qualcomm Hexagon core.

- compatible:
	Usage: required
	Value type: <string>
	Definition: must be one of:
		    "qcom,q6v5-pil",
		    "qcom,ipq8074-wcss-pil"
		    "qcom,msm8916-mss-pil",
		    "qcom,msm8974-mss-pil"
		    "qcom,msm8996-mss-pil"
		    "qcom,msm8998-mss-pil"
		    "qcom,sc7180-mss-pil"
		    "qcom,sdm845-mss-pil"

- reg:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: must specify the base address and size of the qdsp6 and
		    rmb register blocks

- reg-names:
	Usage: required
	Value type: <stringlist>
	Definition: must be "q6dsp" and "rmb"

- interrupts-extended:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: reference to the interrupts that match interrupt-names

- interrupt-names:
	Usage: required
	Value type: <stringlist>
	Definition: The interrupts needed depends on the the compatible
		    string:
	qcom,q6v5-pil:
	qcom,ipq8074-wcss-pil:
	qcom,msm8916-mss-pil:
	qcom,msm8974-mss-pil:
		    must be "wdog", "fatal", "ready", "handover", "stop-ack"
	qcom,msm8996-mss-pil:
	qcom,msm8998-mss-pil:
	qcom,sc7180-mss-pil:
	qcom,sdm845-mss-pil:
		    must be "wdog", "fatal", "ready", "handover", "stop-ack",
		    "shutdown-ack"

- firmware-name:
	Usage: optional
	Value type: <stringlist>
	Definition: must list the relative firmware image paths for mba and
		    modem. They are used for booting and authenticating the
		    Hexagon core.

- clocks:
	Usage: required
	Value type: <phandle>
	Definition: reference to the clocks that match clock-names

- clock-names:
	Usage: required
	Value type: <stringlist>
	Definition: The clocks needed depend on the compatible string:
	qcom,ipq8074-wcss-pil:
		    no clock names required
	qcom,q6v5-pil:
	qcom,msm8916-mss-pil:
	qcom,msm8974-mss-pil:
		    must be "iface", "bus", "mem", "xo"
	qcom,msm8996-mss-pil:
		    must be "iface", "bus", "mem", "xo", "gpll0_mss",
		    "snoc_axi", "mnoc_axi", "pnoc", "qdss"
	qcom,msm8998-mss-pil:
		    must be "iface", "bus", "mem", "xo", "gpll0_mss",
		    "snoc_axi", "mnoc_axi", "qdss"
	qcom,sc7180-mss-pil:
		    must be "iface", "bus", "xo", "snoc_axi", "mnoc_axi",
		    "mss_crypto", "mss_nav", "nav"
	qcom,sdm845-mss-pil:
		    must be "iface", "bus", "mem", "xo", "gpll0_mss",
		    "snoc_axi", "mnoc_axi", "prng"

- resets:
	Usage: required
	Value type: <phandle>
	Definition: reference to the reset-controller for the modem sub-system
		    reference to the list of 3 reset-controllers for the
		    wcss sub-system
		    reference to the list of 2 reset-controllers for the modem
		    sub-system on SC7180, SDM845 SoCs

- reset-names:
	Usage: required
	Value type: <stringlist>
	Definition: must be "mss_restart" for the modem sub-system
		    must be "wcss_aon_reset", "wcss_reset", "wcss_q6_reset"
		    for the wcss sub-system
		    must be "mss_restart", "pdc_reset" for the modem
		    sub-system on SC7180, SDM845 SoCs

For the compatible strings below the following supplies are required:
  "qcom,q6v5-pil"
  "qcom,msm8916-mss-pil",
- cx-supply:
- mx-supply:
- pll-supply:
	Usage: required
	Value type: <phandle>
	Definition: reference to the regulators to be held on behalf of the
		    booting of the Hexagon core

For the compatible string below the following supplies are required:
  "qcom,msm8974-mss-pil"
- cx-supply:
- mss-supply:
- mx-supply:
- pll-supply:
	Usage: required
	Value type: <phandle>
	Definition: reference to the regulators to be held on behalf of the
		    booting of the Hexagon core

For the compatible string below the following supplies are required:
  "qcom,msm8996-mss-pil"
- pll-supply:
	Usage: required
	Value type: <phandle>
	Definition: reference to the regulators to be held on behalf of the
		    booting of the Hexagon core

- power-domains:
	Usage: required
	Value type: <phandle>
	Definition: reference to power-domains that match power-domain-names

- power-domain-names:
	Usage: required
	Value type: <stringlist>
	Definition: The power-domains needed depend on the compatible string:
	qcom,q6v5-pil:
	qcom,ipq8074-wcss-pil:
	qcom,msm8916-mss-pil:
	qcom,msm8974-mss-pil:
		    no power-domain names required
	qcom,msm8996-mss-pil:
	qcom,msm8998-mss-pil:
		    must be "cx", "mx"
	qcom,sc7180-mss-pil:
	qcom,sdm845-mss-pil:
		    must be "cx", "mx", "mss", "load_state"

- qcom,smem-states:
	Usage: required
	Value type: <phandle>
	Definition: reference to the smem state for requesting the Hexagon to
		    shut down

- qcom,smem-state-names:
	Usage: required
	Value type: <stringlist>
	Definition: must be "stop"

- qcom,halt-regs:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: a phandle reference to a syscon representing TCSR followed
		    by the three offsets within syscon for q6, modem and nc
		    halt registers.

For the compatible strings below the following phandle references are required:
  "qcom,sc7180-mss-pil"
- qcom,halt-nav-regs:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: reference to a list of 2 phandles with one offset each for
		    the modem sub-system running on SC7180 SoC. The first
		    phandle reference is to the mss clock node followed by the
		    offset within register space for nav halt register. The
		    second phandle reference is to a syscon representing TCSR
		    followed by the offset within syscon for conn_box_spare0
		    register.

= SUBNODES:
The Hexagon node must contain two subnodes, named "mba" and "mpss" representing
the memory regions used by the Hexagon firmware. Each sub-node must contain:

- memory-region:
	Usage: required
	Value type: <phandle>
	Definition: reference to the reserved-memory for the region

The Hexagon node may also have an subnode named either "smd-edge" or
"glink-edge" that describes the communication edge, channels and devices
related to the Hexagon.  See ../soc/qcom/qcom,smd.txt and
../soc/qcom/qcom,glink.txt for details on how to describe these.

= EXAMPLE
The following example describes the resources needed to boot control the
Hexagon, as it is found on MSM8974 boards.

	modem-rproc@fc880000 {
		compatible = "qcom,q6v5-pil";
		reg = <0xfc880000 0x100>,
		      <0xfc820000 0x020>;
		reg-names = "qdsp6", "rmb";

		interrupts-extended = <&intc 0 24 1>,
				      <&modem_smp2p_in 0 0>,
				      <&modem_smp2p_in 1 0>,
				      <&modem_smp2p_in 2 0>,
				      <&modem_smp2p_in 3 0>;
		interrupt-names = "wdog",
				  "fatal",
				  "ready",
				  "handover",
				  "stop-ack";

		clocks = <&gcc GCC_MSS_Q6_BIMC_AXI_CLK>,
			 <&gcc GCC_MSS_CFG_AHB_CLK>,
			 <&gcc GCC_BOOT_ROM_AHB_CLK>;
		clock-names = "iface", "bus", "mem";

		qcom,halt-regs = <&tcsr_mutex_block 0x1180 0x1200 0x1280>;

		resets = <&gcc GCC_MSS_RESTART>;
		reset-names = "mss_restart";

		cx-supply = <&pm8841_s2>;
		mss-supply = <&pm8841_s3>;
		mx-supply = <&pm8841_s1>;
		pll-supply = <&pm8941_l12>;

		qcom,smem-states = <&modem_smp2p_out 0>;
		qcom,smem-state-names = "stop";

		mba {
			memory-region = <&mba_region>;
		};

		mpss {
			memory-region = <&mpss_region>;
		};
	};