linux-kernel - [PATCH v4 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

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Message-Id: <20241125-k1-i2c-master-v4-1-0f3d5886336b@gmail.com>
Date: Mon, 25 Nov 2024 14:49:53 +0800
From: Troy Mitchell <troymitchell988@...il.com>
To: Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Troy Mitchell <troymitchell988@...il.com>
Cc: linux-riscv@...ts.infradead.org, linux-i2c@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Troy Mitchell <TroyMitchell988@...il.com>
Subject: [PATCH v4 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

From: Troy Mitchell <troymitchell988@...il.com>

The I2C of K1 supports fast-speed-mode and high-speed-mode,
and supports FIFO transmission.

Signed-off-by: Troy Mitchell <TroyMitchell988@...il.com>
---
 .../devicetree/bindings/i2c/spacemit,k1-i2c.yaml   | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml
new file mode 100644
index 000000000000..e7cc62f39e28
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/spacemit,k1-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C controller embedded in SpacemiT's K1 SoC
+
+maintainers:
+  - Troy Mitchell <troymitchell988@...il.com>
+
+properties:
+  compatible:
+    const: spacemit,k1-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: |
+      K1 support three different modes which running different frequencies
+      standard speed mode: up to 100000 (100Hz)
+      fast speed mode    : up to 400000 (400Hz)
+      high speed mode    : up to 3300000 (3.3Mhz)
+    default: 400000
+    maximum: 3300000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@...10800 {
+        compatible = "spacemit,k1-i2c";
+        reg = <0xd4010800 0x38>;
+        interrupt-parent = <&plic>;
+        interrupts = <36>;
+        clocks = <&ccu 90>;
+        clock-frequency = <100000>;
+    };
+
+...

-- 
2.34.1