[RFC PATCH 2/6] dt-bindings: bus: Add qcom,soc-sc7180 SoC

Stephen Boyd
2025-01-08T01:28:52Z

Document the Qualcomm SC7180 System on a Chip (SoC). This SoC is made up
of multiple devices that have their own bindings, therefore this binding
is for a "bus" that is the SoC node.

TODO: Document all child nodes. This is woefully incomplete but at least
shows what is involved with describing an SoC node in dt schema.

Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: <devicetree@vger.kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konradybcio@kernel.org>
Cc: <linux-arm-msm@vger.kernel.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
.../bindings/bus/qcom,soc-sc7180.yaml | 76 +++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 Documentation/devicetree/bindings/bus/qcom,soc-sc7180.yaml

diff --git a/Documentation/devicetree/bindings/bus/qcom,soc-sc7180.yaml b/Documentation/devicetree/bindings/bus/qcom,soc-sc7180.yaml
new file mode 100644
index 000000000000..56f8b75ecdab
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/qcom,soc-sc7180.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/qcom,soc-sc7180.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SC7180 SoC
+
+maintainers:
+ - Bjorn Andersson <andersson@kernel.org>
+ - Konrad Dybcio <konradybcio@kernel.org>
+
+description:
+ Qualcomm's SC7180 System on a Chip (SoC).
+
+properties:
+ compatible:
+ items:
+ - const: qcom,soc-sc7180
+ - const: simple-bus
+
+ '#address-cells':
+ const: 2
+
+ '#size-cells':
+ const: 2
+
+ clock-controller@100000:
+ $ref: /schemas/clock/qcom,gcc-sc7180.yaml#
+
+ watchdog@17c10000:
+ $ref: /schemas/watchdog/qcom-wdt.yaml#
+
+required:
+ - compatible
+ - '#address-cells'
+ - '#size-cells'
+ - clock-controller@100000
+ - watchdog@17c10000
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ compatible = "qcom,soc-sc7180", "simple-bus";
+
+ // TODO: Is it possible to ignore the details?
+ clock-controller@100000 {
+ compatible = "qcom,gcc-sc7180";
+ reg = <0 0x00100000 0 0x1f0000>;
+ clocks = <&rpmhcc_RPMH_CXO_CLK>,
+ <&rpmhcc_RPMH_CXO_CLK_A>,
+ <&sleep_clk>;
+ clock-names = "bi_tcxo", "bi_tcxo_ao", "sleep_clk";
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ #power-domain-cells = <1>;
+ power-domains = <&rpmhpd_SC7180_CX>;
+ };
+
+ watchdog@17c10000 {
+ compatible = "qcom,apss-wdt-sc7180", "qcom,kpss-wdt";
+ reg = <0 0x17c10000 0 0x1000>;
+ clocks = <&sleep_clk>;
+ interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
+ };
+ };
+
+...
--