Like SG2042, SG2044 also uses an external msi controller to provide
MSI interrupt for PCIe controllers. The difference between these
two msi controlling are summary as follows:

1. SG2044 acks the interrupt by writing 0, as on SG2042 by setting
   related bit.
2. SG2044 uses interrupt number mod 32 as msi message data, but
   SG2042 uses setting related bit.

Add support for the SG2044 msi controller.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Tested-by: Chen Wang <wangchen20@iscas.ac.cn> # SG2042
---
 .../bindings/interrupt-controller/sophgo,sg2042-msi.yaml      | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
index e1ffd55fa7bf..f6b8b1d92f79 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
@@ -18,7 +18,9 @@ allOf:
 
 properties:
   compatible:
-    const: sophgo,sg2042-msi
+    enum:
+      - sophgo,sg2042-msi
+      - sophgo,sg2044-msi
 
   reg:
     items:
-- 
2.49.0

The following commit has been merged into the irq/drivers branch of tip:

Commit-ID:     9fe5a0790af6af619940a2819aabe8f6fb30700c
Gitweb:        https://git.kernel.org/tip/9fe5a0790af6af619940a2819aabe8f6fb30700c
Author:        Inochi Amaoto <inochiama@gmail.com>
AuthorDate:    Mon, 14 Apr 2025 06:49:12 +08:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 14 Apr 2025 19:35:36 +02:00

dt-bindings: interrupt-controller: Add Sophgo SG2044 MSI controller

Like SG2042, SG2044 also uses an external MSI controller to provide
MSI interrupt for PCIe controllers. The difference between these
two MSI controllers are:

  1. SG2044 acks the interrupt by writing 0, SG2042 by setting the
     bit related to the interrupt.

  2. SG2044 uses interrupt number modulo 32 as MSI message data, but
     SG2042 uses the bit related to the interrupt.

Add support for the SG2044 MSI controller.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chen Wang <wangchen20@iscas.ac.cn> # SG2042
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/all/20250413224922.69719-2-inochiama@gmail.com

---
 Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
index e1ffd55..f6b8b1d 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
@@ -18,7 +18,9 @@ allOf:
 
 properties:
   compatible:
-    const: sophgo,sg2042-msi
+    enum:
+      - sophgo,sg2042-msi
+      - sophgo,sg2044-msi
 
   reg:
     items: