linux-kernel - [PATCH 06/12] dt-bindings: timer: Add Sophgo sg2042 clint

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Date:   Fri, 15 Sep 2023 15:24:15 +0800
From:   Wang Chen <unicornxw@...il.com>
To:     linux-riscv@...ts.infradead.org, conor@...nel.org,
        aou@...s.berkeley.edu, krzysztof.kozlowski+dt@...aro.org,
        palmer@...belt.com, paul.walmsley@...ive.com, robh+dt@...nel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        jszhang@...nel.org, guoren@...nel.org, chao.wei@...hgo.com,
        xiaoguang.xing@...hgo.com, Inochi Amaoto <inochiama@...look.com>
Subject: [PATCH 06/12] dt-bindings: timer: Add Sophgo sg2042 clint

From: Inochi Amaoto <inochiama@...look.com>

The timer and ipi(mswi) of sg2042 are on different addresses. With the
same compatible string, this will cause a mismatch when is processed by
SBI.

Add two new compatible string formatted like `C9xx-clint-xxx` to identify
the timer and ipi device separately, and do not allow c900-clint as the
fallback to avoid conflict.

Signed-off-by: Inochi Amaoto <inochiama@...look.com>
---
 .../bindings/timer/sifive,clint.yaml          | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index a0185e15a42f..2a86b80c3f1e 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -39,6 +39,14 @@ properties:
               - allwinner,sun20i-d1-clint
               - thead,th1520-clint
           - const: thead,c900-clint
+      - items:
+          - enum:
+              - sophgo,sg2042-clint-mtimer
+          - const: thead,c900-clint-mtimer
+      - items:
+          - enum:
+              - sophgo,sg2042-clint-mswi
+          - const: thead,c900-clint-mswi
       - items:
           - const: sifive,clint0
           - const: riscv,clint0
@@ -74,4 +82,22 @@ examples:
                             <&cpu4intc 3>, <&cpu4intc 7>;
        reg = <0x2000000 0x10000>;
     };
+  - |
+    clint-mtimer@...10000 {
+      compatible = "sophgo,sg2042-clint-mtimer", "thead,c900-clint-mtimer";
+      interrupts-extended = <&cpu1intc 7>,
+                            <&cpu2intc 7>,
+                            <&cpu3intc 7>,
+                            <&cpu4intc 7>;
+      reg = <0xac010000 0x00007ff8>;
+    };
+  - |
+    clint-mswi@...00000 {
+      compatible = "sophgo,sg2042-clint-mswi", "thead,c900-clint-mswi";
+      interrupts-extended = <&cpu1intc 3>,
+                            <&cpu2intc 3>,
+                            <&cpu3intc 3>,
+                            <&cpu4intc 3>;
+      reg = <0x94000000 0x00004000>;
+    };
 ...
-- 
2.25.1