linux-kernel - [PATCH next v10 2/2] dt-bindings: i2c: add entry for hisilicon,ascend910-i2c

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Date:   Tue, 1 Nov 2022 16:07:28 +0800
From:   Weilong Chen <chenweilong@...wei.com>
To:     <chenweilong@...wei.com>, <yangyicong@...ilicon.com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <wsa@...nel.org>, <andriy.shevchenko@...ux.intel.com>,
        <f.fainelli@...il.com>, <jarkko.nikula@...ux.intel.com>,
        <jdelvare@...e.de>, <william.zhang@...adcom.com>,
        <jsd@...ihalf.com>, <conor.dooley@...rochip.com>,
        <phil.edworthy@...esas.com>,
        <tharunkumar.pasumarthi@...rochip.com>,
        <semen.protsenko@...aro.org>, <kfting@...oton.com>
CC:     <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH next v10 2/2] dt-bindings: i2c: add entry for hisilicon,ascend910-i2c

Add the new compatible for HiSilicon i2c.

Signed-off-by: Weilong Chen <chenweilong@...wei.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Change since v9:
- No change
Link: https://lore.kernel.org/lkml/20221029115937.179788-2-chenweilong@huawei.com/

Change since v8:
- Use vendor,soc-ipblock format.
- Drop quotes.
- Drop "Device Tree bindings".
- Description goes to top level description.
- Use defines for constants.
Link: https://lore.kernel.org/lkml/20221024015151.342651-2-chenweilong@huawei.com/

 .../bindings/i2c/hisilicon,ascend910-i2c.yaml | 73 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/hisilicon,ascend910-i2c.yaml

diff --git a/Documentation/devicetree/bindings/i2c/hisilicon,ascend910-i2c.yaml b/Documentation/devicetree/bindings/i2c/hisilicon,ascend910-i2c.yaml
new file mode 100644
index 000000000000..7d7a8de7bcd8
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/hisilicon,ascend910-i2c.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/hisilicon,ascend910-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon common I2C controller
+
+maintainers:
+  - Yicong Yang <yangyicong@...ilicon.com>
+
+description:
+  The HiSilicon common I2C controller can be used for many different
+  types of SoC such as Huawei Ascend AI series chips.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: hisilicon,ascend910-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    default: 400000
+
+  i2c-sda-falling-time-ns:
+    default: 343
+
+  i2c-scl-falling-time-ns:
+    default: 203
+
+  i2c-sda-hold-time-ns:
+    default: 830
+
+  i2c-scl-rising-time-ns:
+    default: 365
+
+  i2c-digital-filter-width-ns:
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    i2c@...0000 {
+      compatible = "hisilicon,ascend910-i2c";
+      reg = <0x38b0000 0x10000>;
+      interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
+      i2c-sda-falling-time-ns = <56>;
+      i2c-scl-falling-time-ns = <56>;
+      i2c-sda-hold-time-ns = <56>;
+      i2c-scl-rising-time-ns = <56>;
+      i2c-digital-filter;
+      i2c-digital-filter-width-ns = <0x0>;
+      clocks = <&alg_clk>;
+      clock-frequency = <400000>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index d1214d83c2df..d42e34d1e8e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9228,6 +9228,7 @@ M:	Yicong Yang <yangyicong@...ilicon.com>
 L:	linux-i2c@...r.kernel.org
 S:	Maintained
 W:	https://www.hisilicon.com
+F:	Documentation/devicetree/bindings/i2c/hisilicon,ascend910-i2c.yaml
 F:	drivers/i2c/busses/i2c-hisi.c
 
 HISILICON LPC BUS DRIVER
-- 
2.31.GIT