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From: Hal Feng <hal.feng@starfivetech.com>
To: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jirislaby@kernel.org>,
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	Conor Dooley <conor+dt@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>,
	Hal Feng <hal.feng@starfivetech.com>,
	devicetree@vger.kernel.org,
	linux-serial@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/3] dt-bindings: serial: snps-dw-apb-uart: Add one more reset signal for StarFive JH7110 SoC
Date: Tue,  4 Jun 2024 16:47:27 +0800
Message-ID: <20240604084729.57239-2-hal.feng@starfivetech.com>
In-Reply-To: <20240604084729.57239-1-hal.feng@starfivetech.com>
References: <20240604084729.57239-1-hal.feng@starfivetech.com>
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The UART of StarFive JH7110 has two reset signals.
Both of them are necessary for JH7110 to initialize UART.

Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
---
 .../bindings/serial/snps-dw-apb-uart.yaml      | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index 1001d2a6ace8..4cdb0dcaccf3 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -13,6 +13,20 @@ allOf:
   - $ref: serial.yaml#
   - $ref: rs485.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: starfive,jh7110-uart
+    then:
+      properties:
+        resets:
+          minItems: 2
+    else:
+      properties:
+        resets:
+          maxItems: 1
+
 properties:
   compatible:
     oneOf:
@@ -48,6 +62,7 @@ properties:
           - enum:
               - starfive,jh7100-hsuart
               - starfive,jh7100-uart
+              - starfive,jh7110-uart
           - const: snps,dw-apb-uart
       - const: snps,dw-apb-uart
 
@@ -82,7 +97,8 @@ properties:
     type: boolean
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
 
   reg-shift: true
 
-- 
2.43.2