[PATCH v3 2/9] dt-bindings: serial: describe SA8255p

Praveen Talari
2025-05-02T03:11:07Z

From: Nikunj Kela <quic_nkela@quicinc.com>

SA8255p platform abstracts resources such as clocks, interconnect and
GPIO pins configuration in Firmware. SCMI power and perf protocols are
used to send request for resource configurations.

Add DT bindings for the QUP GENI UART controller on sa8255p platform.

Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Co-developed-by: Praveen Talari <quic_ptalari@quicinc.com>
Signed-off-by: Praveen Talari <quic_ptalari@quicinc.com>

v2 -> v3
- dropped description for interrupt-names
- rebased reg property order in required option

v1 -> v2
- reorder sequence of tags in commit text
- moved reg property after compatible field
- added interrupt-names property
---
.../serial/qcom,sa8255p-geni-uart.yaml | 64 +++++++++++++++++++
1 file changed, 64 insertions(+)
create mode 100644 Documentation/devicetree/bindings/serial/qcom,sa8255p-geni-uart.yaml

diff --git a/Documentation/devicetree/bindings/serial/qcom,sa8255p-geni-uart.yaml b/Documentation/devicetree/bindings/serial/qcom,sa8255p-geni-uart.yaml
new file mode 100644
index 000000000000..85b1d7c05079
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/qcom,sa8255p-geni-uart.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/qcom,sa8255p-geni-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Geni based QUP UART interface
+
+maintainers:
+ - Praveen Talari <quic_ptalari@quicinc.com>
+
+allOf:
+ - $ref: /schemas/serial/serial.yaml#
+
+properties:
+ compatible:
+ enum:
+ - qcom,sa8255p-geni-uart
+ - qcom,sa8255p-geni-debug-uart
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ items:
+ - description: UART core irq
+ - description: Wakeup irq (RX GPIO)
+
+ interrupt-names:
+ items:
+ - const: uart
+ - const: wakeup
+
+ power-domains:
+ minItems: 2
+ maxItems: 2
+
+ power-domain-names:
+ items:
+ - const: power
+ - const: perf
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - power-domains
+ - power-domain-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ serial@990000 {
+ compatible = "qcom,sa8255p-geni-uart";
+ reg = <0x990000 0x4000>;
+ interrupts = <GIC_SPI 531 IRQ_TYPE_LEVEL_HIGH>;
+ power-domains = <&scmi0_pd 0>, <&scmi0_dvfs 0>;
+ power-domain-names = "power", "perf";
+ };
+...
--
2.17.1