[PATCH v6 1/2] dt-bindings: interrupt-controller: mpm: Pass MSG RAM slice through phandle

From: Konrad Dybcio
Date: Sat Nov 25 2023 - 09:27:23 EST


Due to the wild nature of the Qualcomm RPM Message RAM, we can't really
use 'reg' to point to the MPM's slice of Message RAM without cutting into
an already-defined RPM MSG RAM node used for GLINK and SMEM.

Document passing the register space as a slice of SRAM through the
qcom,rpm-msg-ram property. This also makes 'reg' deprecated.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
.../bindings/interrupt-controller/qcom,mpm.yaml | 52 +++++++++++++++-------
1 file changed, 35 insertions(+), 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml b/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
index 509d20c091af..4ce7912d8047 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
@@ -29,6 +29,12 @@ properties:
maxItems: 1
description:
Specifies the base address and size of vMPM registers in RPM MSG RAM.
+ deprecated: true
+
+ qcom,rpm-msg-ram:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the APSS MPM slice of the RPM Message RAM

interrupts:
maxItems: 1
@@ -64,33 +70,45 @@ properties:

required:
- compatible
- - reg
- interrupts
- mboxes
- interrupt-controller
- '#interrupt-cells'
- qcom,mpm-pin-count
- qcom,mpm-pin-map
+ - qcom,rpm-msg-ram

additionalProperties: false

examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
- mpm: interrupt-controller@45f01b8 {
- compatible = "qcom,mpm";
- interrupts = <GIC_SPI 197 IRQ_TYPE_EDGE_RISING>;
- reg = <0x45f01b8 0x1000>;
- mboxes = <&apcs_glb 1>;
- interrupt-controller;
- #interrupt-cells = <2>;
- interrupt-parent = <&intc>;
- qcom,mpm-pin-count = <96>;
- qcom,mpm-pin-map = <2 275>,
- <5 296>,
- <12 422>,
- <24 79>,
- <86 183>,
- <90 260>,
- <91 260>;
+
+ remoteproc-rpm {
+ compatible = "qcom,msm8998-rpm-proc", "qcom,rpm-proc";
+
+ glink-edge {
+ compatible = "qcom,glink-rpm";
+
+ interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+ qcom,rpm-msg-ram = <&rpm_msg_ram>;
+ mboxes = <&apcs_glb 0>;
+ };
+
+ mpm: interrupt-controller {
+ compatible = "qcom,mpm";
+ qcom,rpm-msg-ram = <&apss_mpm>;
+ interrupts = <GIC_SPI 197 IRQ_TYPE_EDGE_RISING>;
+ mboxes = <&apcs_glb 1>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&intc>;
+ qcom,mpm-pin-count = <96>;
+ qcom,mpm-pin-map = <2 275>,
+ <5 296>,
+ <12 422>,
+ <24 79>,
+ <86 183>,
+ <91 260>;
+ };
};

--
2.43.0