linux-kernel - [PATCH 17/22] dt-bindings: serial: document support for SA8255p

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Message-ID: <20240828203721.2751904-18-quic_nkela@quicinc.com>
Date: Wed, 28 Aug 2024 13:37:16 -0700
From: Nikunj Kela <quic_nkela@...cinc.com>
To: <andersson@...nel.org>, <konradybcio@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <rafael@...nel.org>,
        <viresh.kumar@...aro.org>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>, <sudeep.holla@....com>, <andi.shyti@...nel.org>,
        <tglx@...utronix.de>, <will@...nel.org>, <joro@...tes.org>,
        <jassisinghbrar@...il.com>, <lee@...nel.org>,
        <linus.walleij@...aro.org>, <amitk@...nel.org>,
        <thara.gopinath@...il.com>, <broonie@...nel.org>,
        <wim@...ux-watchdog.org>, <linux@...ck-us.net>
CC: <robin.murphy@....com>, <cristian.marussi@....com>, <rui.zhang@...el.com>,
        <lukasz.luba@....com>, <vkoul@...nel.org>, <quic_gurus@...cinc.com>,
        <agross@...nel.org>, <bartosz.golaszewski@...aro.org>,
        <quic_rjendra@...cinc.com>, <robimarko@...il.com>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <linux-crypto@...r.kernel.org>, <arm-scmi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-i2c@...r.kernel.org>,
        <iommu@...ts.linux.dev>, <linux-gpio@...r.kernel.org>,
        <linux-serial@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-watchdog@...r.kernel.org>, <kernel@...cinc.com>,
        <quic_psodagud@...cinc.com>, <quic_tsoni@...cinc.com>,
        <quic_shazhuss@...cinc.com>, Nikunj Kela <quic_nkela@...cinc.com>,
        "Praveen
 Talari" <quic_ptalari@...cinc.com>
Subject: [PATCH 17/22] dt-bindings: serial: document support for SA8255p

Add compatibles representing UART support on SA8255p.

Clocks and interconnects are being configured in the firmware VM
on SA8255p platform, therefore making them optional.

CC: Praveen Talari <quic_ptalari@...cinc.com>
Signed-off-by: Nikunj Kela <quic_nkela@...cinc.com>
---
 .../serial/qcom,serial-geni-qcom.yaml         | 58 ++++++++++++++++---
 1 file changed, 51 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
index dd33794b3534..dcd43e1353ec 100644
--- a/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml
@@ -13,11 +13,42 @@ maintainers:
 allOf:
   - $ref: /schemas/serial/serial.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sa8255p-geni-uart
+              - qcom,sa8255p-geni-debug-uart
+    then:
+      required:
+        - power-domains
+        - power-domain-names
+      properties:
+        power-domains:
+          minItems: 2
+          maxItems: 2
+    else:
+      required:
+        - clocks
+        - clock-names
+      properties:
+        power-domains:
+          maxItems: 1
+        interconnects:
+          maxItems: 2
+        interconnect-names:
+          items:
+            - const: qup-core
+            - const: qup-config
+
 properties:
   compatible:
     enum:
       - qcom,geni-uart
       - qcom,geni-debug-uart
+      - qcom,sa8255p-geni-uart
+      - qcom,sa8255p-geni-debug-uart
 
   clocks:
     maxItems: 1
@@ -26,12 +57,10 @@ properties:
     const: se
 
   interconnects:
-    maxItems: 2
+    description: phandles of interconnect bw provider
 
   interconnect-names:
-    items:
-      - const: qup-core
-      - const: qup-config
+    description: names of interconnects
 
   interrupts:
     minItems: 1
@@ -51,15 +80,19 @@ properties:
       - const: sleep
 
   power-domains:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
+
+  power-domain-names:
+    items:
+      - const: power
+      - const: perf
 
   reg:
     maxItems: 1
 
 required:
   - compatible
-  - clocks
-  - clock-names
   - interrupts
   - reg
 
@@ -83,4 +116,15 @@ examples:
                         <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_0 0>;
         interconnect-names = "qup-core", "qup-config";
     };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    serial@...000 {
+        compatible = "qcom,sa8255p-geni-uart";
+        reg = <0x990000 0x4000>;
+        interrupts = <GIC_SPI 531 IRQ_TYPE_LEVEL_HIGH>;
+        power-domains = <&scmi11_pd 4>, <&scmi11_dvfs 4>;
+        power-domain-names = "power", "perf";
+    };
 ...
-- 
2.34.1