From: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
The document defines the binding for a component that loads firmware for
and boots the Qualcomm WCNSS core.
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
---
Rob,
I got your Ack on v2, but I would like to make a small amendment before merging
this.
As we discussed related to the WiFi binding I should reference the mmio
registers by a phandle to a DT node specifying the two necessary register
blocks (ccu & dxe).
These two register blocks are part of the riva/pronto (the two major versions)
subsystem, that also contains the "pmu" register block, which is what I access
here.
Further more, the ccu block contains valuable information for debugging
purposes that the implementation of this binding would find useful.
I would therefor like to double this node (in the dts) as both the
riva/pronto-pil and the target for the mmio phandle reference from the WiFi
node.
This works fine, but unless using reg-names for defining the order or the regs
I get a messy ordering dependency between the two bindings. I do not know which
of the other 7-8 register blocks we will add for debugging, but with the below
change I can keep them in block order regardless of the order we implement them
in.
So, can I update the "reg" and add "reg-names" as below to the binding and
depend on reg-names for the ordering of reg? Or should I speculatively add all
ranges I know of to keep the order sane?
Regards,
Bjorn
Changes since v2:
- Modify definition of "reg"
- Add "reg-names"
- Update example
.../bindings/remoteproc/qcom,wcnss-pil.txt | 124 +++++++++++++++++++++
1 file changed, 124 insertions(+)
create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt b/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
new file mode 100644
index 000000000000..2ddca9be893e
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
@@ -0,0 +1,124 @@
+Qualcomm WCNSS Peripheral Image Loader
+
+This document defines the binding for a component that loads and boots firmware
+on the Qualcomm WCNSS core.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,riva-pil",
+ "qcom,pronto-v1-pil",
+ "qcom,pronto-v2-pil"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: must contain base address and size of riva/pronto PMU
+ registers
+
+- reg-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: must contain "pmu"
+
+- interrupts-extended:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: must list the watchdog and fatal IRQs and may specify the
+ ready, handover and stop-ack IRQs
+
+- interrupt-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: should be "wdog", "fatal", optionally followed by "ready",
+ "handover", "stop-ack"
+
+- vddmx-supply:
+- vddcx-supply:
+- vddpx-supply:
+ Usage: required
+ Value type: <phandle>
+ Definition: reference to the regulators to be held on behalf of the
+ booting of the WCNSS core
+
+- qcom,state:
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: reference to the SMEM state used to indicate to WCNSS that
+ it should shut down
+
+- qcom,state-names:
+ Usage: optional
+ Value type: <stringlist>
+ Definition: should be "stop"
+
+= SUBNODES
+A single subnode of the WCNSS PIL describes the attached rf module and its
+resource dependencies.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,wcn3620",
+ "qcom,wcn3660",
+ "qcom,wcn3680"
+
+- clocks:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: should specify the xo clock and optionally the rf clock
+
+- clock-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: should be "xo", optionally followed by "rf"
+
+- vddxo-supply:
+- vddrfa-supply:
+- vddpa-supply:
+- vdddig-supply:
+ Usage: required
+ Value type: <phandle>
+ Definition: reference to the regulators to be held on behalf of the
+ booting of the WCNSS core
+
+= EXAMPLE
+The following example describes the resources needed to boot control the WCNSS,
+with attached WCN3680, as it is commonly found on MSM8974 boards.
+
+pronto@fb21b000 {
+ compatible = "qcom,pronto-v2-pil";
+ reg = <0xfb21b000 0x3000>;
+ reg-names = "pmu";
+
+ interrupts-extended = <&intc 0 149 1>,
+ <&wcnss_smp2p_slave 0 0>,
+ <&wcnss_smp2p_slave 1 0>,
+ <&wcnss_smp2p_slave 2 0>,
+ <&wcnss_smp2p_slave 3 0>;
+ interrupt-names = "wdog", "fatal", "ready", "handover", "stop-ack";
+
+ vddmx-supply = <&pm8841_s1>;
+ vddcx-supply = <&pm8841_s2>;
+ vddpx-supply = <&pm8941_s3>;
+
+ qcom,state = <&wcnss_smp2p_out 0>;
+ qcom,state-names = "stop";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&wcnss_pin_a>;
+
+ iris {
+ compatible = "qcom,wcn3680";
+
+ clocks = <&rpmcc RPM_CXO_CLK_SRC>, <&rpmcc RPM_CXO_A2>;
+ clock-names = "xo", "rf";
+
+ vddxo-supply = <&pm8941_l6>;
+ vddrfa-supply = <&pm8941_l11>;
+ vddpa-supply = <&pm8941_l19>;
+ vdddig-supply = <&pm8941_s3>;
+ };
+};
--
2.5.0
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