From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57A037262E; Tue, 26 Aug 2025 00:02:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756166550; cv=none; b=gl9k466zBizS0ZQoTCFYrH34xzwdOb5NLHdw0B/iaXlqeNIOzySGzJ2T27Ln3DmLcANDMwNdeGSTI8RpO427LPXmY1Z2yZyEsQL/2vO1fUiA3yLTHmOQpaYzRNqDq8rzIZIbGtP9Eoa+p4hpxM/vSEhK7Q0RO4pdDcMmOY3uBV0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756166550; c=relaxed/simple; bh=6wpLT61gIiqUq3ZvBcjcj+NeMJ4khUVS2TRpHGP+2lE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=g1DnMFkH1RUZY9ZgRNFUgty7+OZRUZdJ3FWNXbfPAkCLr6ibveHMdzcgBcMt2uQcHxCgLbdniyzqGhf8RYdA/OgSdu9sikU02EbKTOQH5qp+KkT9RwZPWxayAB5pmNC8zXS3TAYgioMIVloo42hRDDsg32YFWWP5oqSxcP+Gxks= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HFQlXYte; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HFQlXYte" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEE51C116B1; Tue, 26 Aug 2025 00:02:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756166549; bh=6wpLT61gIiqUq3ZvBcjcj+NeMJ4khUVS2TRpHGP+2lE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HFQlXYteHdhd6lDz0GobrCZG5yoPAj0jr74d3AGC3y6M5FOEVSSGpeovfU+Wm9g8U Bnqk4g2G/3p7v1t+mggicQ/JEQ2eHNNfMb104iqeLE92IgCLGNJD8Ap3H6mEto+C+2 1yzn/ciCiRkKlIMK9NmNv5AKvhziJnpMwkqC5X1jfo04A54fHXZsDJzSOwCDas6ywi q+CXR5zsmPHS1wqPNzPhtuauBXCF2mzf0gQyL+518syWqrcdUy79eI0TMqgNe8CkX3 rLl9lRetCKRC9cxcLAgUCOUJgBoASH2RCSPI9lSmDdiKGUwNJT1cTzkxNIvFPq2zr+ oqfjGM4YoijUw== From: Jisheng Zhang To: Richard Leitner , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski Subject: [PATCH v4 1/3] dt-bindings: usb: usb251xb: support usage case without I2C control Date: Tue, 26 Aug 2025 07:45:07 +0800 Message-ID: <20250825234509.1041-2-jszhang@kernel.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250825234509.1041-1-jszhang@kernel.org> References: <20250825234509.1041-1-jszhang@kernel.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, the usb251xb assumes i2c control, but from HW point of view, the hub supports usage case without any i2c control, I.E we only want the gpio controls, for example the following dt node: usb-hub { compatible = "microchip,usb2512b"; reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>; }; Modify the dt-binding of usb2512b to support this usage case, and add the usage example to the examples section. Signed-off-by: Jisheng Zhang Reviewed-by: Krzysztof Kozlowski --- Documentation/devicetree/bindings/usb/usb251xb.yaml | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/usb/usb251xb.yaml b/Documentation/devicetree/bindings/usb/usb251xb.yaml index ac5b99710332..0329a6aaaa92 100644 --- a/Documentation/devicetree/bindings/usb/usb251xb.yaml +++ b/Documentation/devicetree/bindings/usb/usb251xb.yaml @@ -240,7 +240,6 @@ additionalProperties: false required: - compatible - - reg examples: - | @@ -269,3 +268,11 @@ examples: swap-dx-lanes = <1 2>; }; }; + + - | + #include + usb-hub { + /* I2C is not connected */ + compatible = "microchip,usb2512b"; + reset-gpios = <&porta 8 GPIO_ACTIVE_LOW>; + }; -- 2.50.0