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Wed, 25 Sep 2024 08:04:54 +0000 From: Michael Wu To: Jarkko Nikula , Andy Shevchenko , Mika Westerberg , Jan Dabros , linux-i2c@vger.kernel.org Cc: Andi Shyti , Morgan Chang , linux-kernel@vger.kernel.org, Michael Wu Subject: [PATCH 2/2] dt-bindings: i2c: snps,designware-i2c: add bus-loading and clk-freq-optimized Date: Wed, 25 Sep 2024 16:04:31 +0800 Message-ID: <20240925080432.186408-3-michael.wu@kneron.us> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240925080432.186408-1-michael.wu@kneron.us> References: <20240925080432.186408-1-michael.wu@kneron.us> X-ClientProxiedBy: TYCP286CA0161.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:383::6) To IA1PR14MB6224.namprd14.prod.outlook.com (2603:10b6:208:42b::6) Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA1PR14MB6224:EE_|PH8PR14MB7109:EE_ X-MS-Office365-Filtering-Correlation-Id: 1536a015-c219-4f9b-c1ac-08dcdd38bcfa X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|376014|1800799024|366016|80162021|38350700014; 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"bus-loading" is used to declare the value of IC_CAP_LOADING, and "clk-freq-optimized" is used to declare IC_CLK_FREQ_OPTIMIZATION = 1. Signed-off-by: Michael Wu --- .../bindings/i2c/snps,designware-i2c.yaml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml index 60035a787e5c..f954f5014a00 100644 --- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml @@ -87,6 +87,16 @@ properties: This value is used to compute the tHIGH period. default: 300 + bus-loading: + description: | + This property should be 100 or 400 for high speed mode. + This value is used to compute the tHIGH period and the tLOW period. + default: 100 + + clk_freq_optimized: + description: | + Thie property is used to declare whether the internal latency is reduced. + dmas: items: - description: TX DMA Channel @@ -146,4 +156,13 @@ examples: interrupts = <8>; clocks = <&ahb_clk>; }; + - | + i2c@ce500000 { + compatible = "snps,designware-i2c"; + reg = <0xce500000 0x1000>; + interrupts = <37 1>; + clock-frequency = <3400000>; + bus-loading = <400>; + clk-freq-optimized; + }; ...