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Sat, 31 Oct 2026 04:55:25 -0500 Received: from [10.24.51.24] (psdkl-workstation0.dhcp.ti.com [10.24.51.24]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 69V9tLWq1469207; Sat, 31 Oct 2026 04:55:22 -0500 Message-ID: <2a458be7-1235-4f59-ac4f-d838356af4a6@ti.com> Date: Sat, 31 Oct 2026 15:25:21 +0530 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/2] dt-bindings: i2c: Add Synopsys DWC_i2c controller To: Krzysztof Kozlowski CC: Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , , , , References: <20261027-tda54-upstream-i2c-v4-0-ebeeaf87d181@ti.com> <20261027-tda54-upstream-i2c-v4-1-ebeeaf87d181@ti.com> <20261027-masked-ultraviolet-kittiwake-7da8ec@quoll> Content-Language: en-US From: Aniket Limaye In-Reply-To: <20261027-masked-ultraviolet-kittiwake-7da8ec@quoll> Content-Type: text/plain; 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Do not add a generic >> compatible and only list SoC specific compatibles. The file is named >> after the IP so that other SoCs integrating it can be added here. >> >> Signed-off-by: Aniket Limaye >> >> --- >> > > Here you mention dependency on new dtschema (unreleased), since the > property was added a few days ago. > Ahh okay, will add in next version >> Changes in v4: >> - Drop the approach of extending the existing i2c-designware-* driver >> with a MODEL_TI_TDA54 variant. Instead, add a new standalone driver >> (i2c-dwc-adv.c) and a new binding (snps,dwc-adv-i2c.yaml), since >> DWC_i2c is not register compatible with DW_apb_i2c. (Andy Shevchenko) >> - Drop the snps,tx-fifo-depth/snps,rx-fifo-depth DT properties from >> the new binding; FIFO depth is now tied to the compatible string via >> driver match data instead. (Conor Dooley) >> - Link to v3: https://lore.kernel.org/all/20260925-tda54-upstream-i2c-v3-1-544d74e992ff@ti.com/ >> >> Changes in v2: >> - Rename snps,dwc-i2c to ti,tda54-i2c >> - Link to v1: https://lore.kernel.org/r/20260919-tda54-upstream-i2c-v1-1-b0b9f77be18b@ti.com/ >> --- >> .../devicetree/bindings/i2c/snps,dwc-adv-i2c.yaml | 75 ++++++++++++++++++++++ >> 1 file changed, 75 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/i2c/snps,dwc-adv-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,dwc-adv-i2c.yaml >> new file mode 100644 >> index 000000000000..7ad22536825e >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/i2c/snps,dwc-adv-i2c.yaml >> @@ -0,0 +1,75 @@ >> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/i2c/snps,dwc-adv-i2c.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Synopsys DesignWare Advanced I2C (DWC_i2c) Controller >> + >> +maintainers: >> + - Aniket Limaye >> + >> +allOf: >> + - $ref: /schemas/i2c/i2c-controller.yaml# >> + >> +properties: >> + compatible: >> + enum: >> + - ti,tda54-i2c >> + >> + reg: >> + maxItems: 1 >> + >> + interrupts: >> + maxItems: 1 >> + >> + clocks: >> + items: >> + - description: I2C functional clock (ic_clk) >> + - description: Register interface clock (pclk) >> + >> + clock-names: >> + items: >> + - const: ref >> + - const: pclk >> + >> + resets: >> + maxItems: 1 >> + >> + clock-frequency: >> + enum: [100000, 400000, 1000000, 3400000] >> + default: 400000 >> + >> + i2c-sda-hold-time-ns: true > > Missing default, constraints (minimum/maximum) > > >> + >> + i2c-scl-falling-time-ns: >> + default: 300 > > no min/max? > Ack, will add those defaults and constraints in next version. >> + >> + i2c-sda-falling-time-ns: >> + default: 300 > > Best regards, > Krzysztof > Thanks for the review! Aniket