From patchwork Mon Dec 30 13:22:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 854331 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (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 5C3561A83E6; Mon, 30 Dec 2024 13:22:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735564949; cv=none; b=fKs1vV2F6qDDvja4aTT2u5pHRJX8pp9Tqdfl+/OQcrtBfJmd04NBAjzQopCswLHOUtY56kGJPQxZUbjcPVrHKG7xv4vZKOWIlFu1qxXBcbyaN+edCJb7mx4l2WwO2PL0tmkJBDMHP8pKD57J3O0KQqw1xZQUDmEAyc/KHGMqlaE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735564949; c=relaxed/simple; bh=2wNb0ljvDCco91c2lkRWAVhQaQI+0RaU8HpQjf9yTU0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=odusWhUXVqMKs1dd09+rFWQpg6jclT50IeEglnr2B1hKqbEbhl0HdtKo4XPfnmH/6wHpdkEEkSyLjCmbM3cEmoEJ+ikdDq/KydkdWUSU7W9AaojWfPojqtD+y5M02JgobZOe41c49avnqJwBWru8ielqrRHGDw+9AhIUJ0m0ZWU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=M6CXjGnw; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="M6CXjGnw" Received: by mail.gandi.net (Postfix) with ESMTPSA id E2FD740006; Mon, 30 Dec 2024 13:22:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1735564938; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=U5xciO/A0VbTKvNpAyu0K3ipQvV3vjm2jojCgoiIOXw=; b=M6CXjGnwwoUWQysQXj9TchxFHwdL5Uo01sFyuXR9F6pNWzcxVKl095OwGgT71QKkOKxNDT nvFLi9Uz1i06gXmSwAH0oVcMw9OAqedWSntJjUUVo9bMl3XDnGuWKbPlK8np2hXHBluHVW ZFyRe6WLbhHU63On+pYD+DwW3+TBs9hbyE0cEs/hvkEZ6nlE6+QPtZarmT4QxPIVvBlqZH xOe8JPyEychpcUkJ8azU/MlyKAuLHrAogLa2whoiK0G/e3rvvxRDEhzhvCEKmtuqPWB+xZ kuFdvamIvD/DFIX95xG4YZrJ2RErwzAj2EhOzpOr6iOzUdXqNSEinledZyJVxA== From: Romain Gantois Date: Mon, 30 Dec 2024 14:22:03 +0100 Subject: [PATCH v4 1/9] dt-bindings: misc: Describe TI FPC202 dual port controller Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241230-fpc202-v4-1-761b297dc697@bootlin.com> References: <20241230-fpc202-v4-0-761b297dc697@bootlin.com> In-Reply-To: <20241230-fpc202-v4-0-761b297dc697@bootlin.com> To: Wolfram Sang , Tomi Valkeinen , Luca Ceresoli , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Greg Kroah-Hartman , Mauro Carvalho Chehab , Linus Walleij , Bartosz Golaszewski Cc: Thomas Petazzoni , Kory Maincent , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-media@vger.kernel.org, linux-gpio@vger.kernel.org, Romain Gantois X-Mailer: b4 0.14.2 X-GND-Sasl: romain.gantois@bootlin.com The FPC202 dual port controller serves as a low speed signal aggregator for common port types, notably SFP. It provides access to I2C and low-speed GPIO signals of a downstream device through a single upstream control interface. Up to two logical I2C addresses can be accessed on each of the FPC202's ports. The port controller acts as an I2C translator (ATR). It converts addresses of incoming and outgoing I2C transactions. One use case of this is accessing two SFP modules at logical address 0x50 from the same upstream I2C controller, using two different client aliases. Signed-off-by: Romain Gantois --- .../devicetree/bindings/misc/ti,fpc202.yaml | 94 ++++++++++++++++++++++ MAINTAINERS | 6 ++ 2 files changed, 100 insertions(+) diff --git a/Documentation/devicetree/bindings/misc/ti,fpc202.yaml b/Documentation/devicetree/bindings/misc/ti,fpc202.yaml new file mode 100644 index 0000000000000000000000000000000000000000..bd1429c72d5efb62d2eeef1e74929fe0f80c86fc --- /dev/null +++ b/Documentation/devicetree/bindings/misc/ti,fpc202.yaml @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/misc/ti,fpc202.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI FPC202 dual port controller with expanded IOs + +maintainers: + - Romain Gantois + +allOf: + - $ref: /schemas/i2c/i2c-atr.yaml# + +properties: + compatible: + const: ti,fpc202 + + reg: + maxItems: 1 + + gpio-controller: true + + "#gpio-cells": + const: 2 + + enable-gpios: + description: + Specifier for the GPIO connected to the EN pin. + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +patternProperties: + "^i2c@[0-1]$": + $ref: /schemas/i2c/i2c-controller.yaml# + description: Downstream device ports 0 and 1 + + properties: + reg: + maxItems: 1 + description: + Downstream port ID + + required: + - "#address-cells" + - "#size-cells" + - reg + + unevaluatedProperties: false + +required: + - compatible + - gpio-controller + - "#gpio-cells" + - reg + - "#address-cells" + - "#size-cells" + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + i2c-atr@f { + compatible = "ti,fpc202"; + reg = <0xf>; + #address-cells = <1>; + #size-cells = <0>; + + gpio-controller; + #gpio-cells = <2>; + + i2c@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + }; + + i2c@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index 1e930c7a58b13d8bbe6bf133ba7b36aa24c2b5e0..2ef5c0d395b3668167dddbd27237a2177f85571e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23497,6 +23497,12 @@ F: drivers/misc/tifm* F: drivers/mmc/host/tifm_sd.c F: include/linux/tifm.h +TI FPC202 DUAL PORT CONTROLLER +M: Romain Gantois +L: linux-kernel@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/misc/ti,fpc202.yaml + TI FPD-LINK DRIVERS M: Tomi Valkeinen L: linux-media@vger.kernel.org