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

Weilong Chen
2022-11-01T08:00:19Z

Add the new compatible for HiSilicon i2c.

Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.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@hisilicon.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@38b0000 {
+ 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@hisilicon.com>
L: linux-i2c@vger.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