dt-binding: remoteproc: Introduce ADSP loader binding

This document defines the binding for a component that loads firmware
and control the life cycle of the Qualcomm ADSP Hexagon core.

Acked-by: Rob Herring <robh@kernel.org>
Cc: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt
new file mode 100644 (file)
index 0000000..b85885a
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+++ b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt
@@ -0,0 +1,98 @@
+Qualcomm ADSP Peripheral Image Loader
+
+This document defines the binding for a component that loads and boots firmware
+on the Qualcomm ADSP Hexagon core.
+
+- compatible:
+       Usage: required
+       Value type: <string>
+       Definition: must be one of:
+                   "qcom,msm8974-adsp-pil"
+                   "qcom,msm8996-adsp-pil"
+
+- interrupts-extended:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: must list the watchdog, fatal IRQs ready, handover and
+                   stop-ack IRQs
+
+- interrupt-names:
+       Usage: required
+       Value type: <stringlist>
+       Definition: must be "wdog", "fatal", "ready", "handover", "stop-ack"
+
+- clocks:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: reference to the xo clock to be held on behalf of the
+                   booting Hexagon core
+
+- clock-names:
+       Usage: required
+       Value type: <stringlist>
+       Definition: must be "xo"
+
+- cx-supply:
+       Usage: required
+       Value type: <phandle>
+       Definition: reference to the regulator to be held on behalf of the
+                   booting Hexagon core
+
+- memory-region:
+       Usage: required
+       Value type: <phandle>
+       Definition: reference to the reserved-memory for the ADSP
+
+- qcom,smem-states:
+       Usage: required
+       Value type: <phandle>
+       Definition: reference to the smem state for requesting the ADSP to
+                   shut down
+
+- qcom,smem-state-names:
+       Usage: required
+       Value type: <stringlist>
+       Definition: must be "stop"
+
+
+= SUBNODES
+The adsp node may have an subnode named "smd-edge" that describes the SMD edge,
+channels and devices related to the ADSP.  See ../soc/qcom/qcom,smd.txt for
+details on how to describe the SMD edge.
+
+
+= EXAMPLE
+The following example describes the resources needed to boot control the
+ADSP, as it is found on MSM8974 boards.
+
+       adsp {
+               compatible = "qcom,msm8974-adsp-pil";
+
+               interrupts-extended = <&intc 0 162 IRQ_TYPE_EDGE_RISING>,
+                                     <&adsp_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
+                                     <&adsp_smp2p_in 1 IRQ_TYPE_EDGE_RISING>,
+                                     <&adsp_smp2p_in 2 IRQ_TYPE_EDGE_RISING>,
+                                     <&adsp_smp2p_in 3 IRQ_TYPE_EDGE_RISING>;
+               interrupt-names = "wdog",
+                                 "fatal",
+                                 "ready",
+                                 "handover",
+                                 "stop-ack";
+
+               clocks = <&rpmcc RPM_CXO_CLK>;
+               clock-names = "xo";
+
+               cx-supply = <&pm8841_s2>;
+
+               memory-region = <&adsp_region>;
+
+               qcom,smem-states = <&adsp_smp2p_out 0>;
+               qcom,smem-state-names = "stop";
+
+               smd-edge {
+                       interrupts = <0 156 IRQ_TYPE_EDGE_RISING>;
+
+                       qcom,ipc = <&apcs 8 8>;
+                       qcom,smd-edge = <1>;
+               };
+       };