From: ryan_chen <ryan_chen@aspeedtech.com>
To: <BMC-SW@aspeedtech.com>, Rob Herring <robh+dt@kernel.org>,
Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
Philipp Zabel <p.zabel@pengutronix.de>,
<linux-arm-kernel@lists.infradead.org>,
<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>
Cc: Ryan Chen <ryan_chen@aspeedtech.com>
Subject: [PATCH 1/2] dt-bindings: i2c-new: Add bindings for AST2600 i2C new controller
Date: Wed, 23 Mar 2022 08:40:08 +0800 [thread overview]
Message-ID: <20220323004009.943298-2-ryan_chen@aspeedtech.com> (raw)
In-Reply-To: <20220323004009.943298-1-ryan_chen@aspeedtech.com>
AST2600 support new register set for I2C controller, add bindings document
to support driver of i2c new controller
Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
.../bindings/i2c/aspeed,i2c-new.yaml | 78 +++++++++++++++++++
1 file changed, 78 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/aspeed,i2c-new.yaml
diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c-new.yaml b/Documentation/devicetree/bindings/i2c/aspeed,i2c-new.yaml
new file mode 100644
index 000000000000..2e49c5438ad2
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c-new.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/aspeed,i2c-new.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED New I2C Controller on the AST26XX SoCs Device Tree Bindings
+
+maintainers:
+ - Ryan Chen <ryan_chen@aspeedtech.com>
+
+allOf:
+ - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2600-i2c-bus
+
+ reg:
+ minItems: 1
+ items:
+ - description: address offset and range of bus
+ - description: address offset and range of bus buffer
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+ description:
+ root clock of bus, should reference the APB
+ clock in the second cell
+
+ resets:
+ maxItems: 1
+
+ bus-frequency:
+ minimum: 500
+ maximum: 2000000
+ default: 100000
+ description: frequency of the bus clock in Hz defaults to 100 kHz when not
+ specified
+
+ multi-master:
+ type: boolean
+ description:
+ states that there is another master active on this bus
+
+required:
+ - reg
+ - compatible
+ - clocks
+ - resets
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/ast2600-clock.h>
+
+ i2c_gr: i2c-global-regs@0 {
+ compatible = "aspeed,ast2600-i2c-global", "syscon";
+ reg = <0x0 0x20>;
+ resets = <&syscon ASPEED_RESET_I2C>;
+ };
+
+ i2c0: i2c-bus@80 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #interrupt-cells = <1>;
+ compatible = "aspeed,ast2600-i2c-bus";
+ reg = <0x80 0x80>, <0xC00 0x20>;
+ clocks = <&syscon ASPEED_CLK_APB2>;
+ resets = <&syscon ASPEED_RESET_I2C>;
+ bus-frequency = <100000>;
+ };
--
2.25.1
next prev parent reply other threads:[~2022-03-23 0:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-23 0:40 [PATCH 0/2] Add ASPEED AST2600 I2C new controller driver ryan_chen
2022-03-23 0:40 ` ryan_chen [this message]
2022-03-23 0:40 ` [PATCH 2/2] i2c:aspeed:support ast2600 i2c new register mode driver ryan_chen
2022-03-23 4:07 ` kernel test robot
2022-03-23 12:37 ` Andrew Lunn
2022-03-25 5:19 ` Ryan Chen
2022-03-24 8:56 ` kernel test robot
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