linux-kernel - [PATCH v2 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

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Message-Id: <20241028053220.346283-2-TroyMitchell988@gmail.com>
Date: Mon, 28 Oct 2024 13:32:19 +0800
From: Troy Mitchell <troymitchell988@...il.com>
To: andi.shyti@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: troymitchell988@...il.com,
	linux-i2c@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH v2 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

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

Signed-off-by: Troy Mitchell <TroyMitchell988@...il.com>
---
 .../bindings/i2c/spacemit,k1-i2c.yaml         | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml

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..57af66f494e7
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml
@@ -0,0 +1,51 @@
+# 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: 2
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description:
+      Desired I2C bus clock frequency in Hz. As only fast and high-speed
+      modes are supported by hardware, possible values are 100000 and 400000.
+    enum: [100000, 400000]
+    default: 100000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c@...10800 {
+        compatible = "spacemit,k1-i2c";
+        reg = <0x0 0xd4010800 0x0 0x38>;
+        interrupt-parent = <&plic>;
+        interrupts = <36>;
+        clocks = <&ccu 90>;
+        clock-frequency = <100000>;
+    };
+
+...
-- 
2.34.1