From patchwork Thu Feb 27 10:21:49 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 869967 Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) (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 CFBFB1E833A; Thu, 27 Feb 2025 10:21:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.200 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740651722; cv=none; b=LLA/O2FvYCEVbAkqzlVEJ5uIRyhpz1iwFIfScgf8JiDMwxem0QNZ9V8jJkeI5tskSI3XvsaXfPFcW6hAiutXAsKzbPM9VVe3nUGGSUip1LLQZgoMTUNLUrMaLgaBn1XJLAARwhYrp5ObjrUUtH8USVLGY7V5TKQZ9SAgnLk7URw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740651722; c=relaxed/simple; bh=RWqPCbickcf3NeEvAFuVv/cebJHAevvYYSffWUo/kxs=; 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c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1740651718; 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=Z9Dw8MEw6E4S3LOI35bfz6vBrtEq+quc3+6ULKl0+OY=; b=fmTG5SBGHvS4DBStSHn1e/FO047Jr7NwsJ7D4PTWCMW8CBg+Aa63QnSlf88PcJWdOAYqvE Leukbz3JP2x/h+0+/vZhahu9ZVc7yA11BgKbVjDuDMNq+OPz5GkKEnscOjfcuVcufyT1bY D7S9R7SAB+tvSkhJcupp2gzMaTrBPkrbKJHXbadEXfRfXWRSZugplh6xGmG5A6BOPyL3Ua CcKzrdwzNdDicrG+ho+zxcmK0ZZvQcBwHmzRhX+XJvSYyBWWNM5yd1LGZh8m0K7/0/LLBd uiO7mVYmNRDOa9Ov03mDcRmXGCi9nWVnJitlCjgNEPEDxRIp7sd2e8FqOMvfLA== From: Romain Gantois Date: Thu, 27 Feb 2025 11:21:49 +0100 Subject: [PATCH v8 1/9] dt-bindings: misc: Describe TI FPC202 dual port controller Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250227-fpc202-v8-1-b7994117fbe2@bootlin.com> References: <20250227-fpc202-v8-0-b7994117fbe2@bootlin.com> In-Reply-To: <20250227-fpc202-v8-0-b7994117fbe2@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 , Conor Dooley X-Mailer: b4 0.14.2 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdekjedvudcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephfffufggtgfgkfhfjgfvvefosehtjeertdertdejnecuhfhrohhmpeftohhmrghinhcuifgrnhhtohhishcuoehrohhmrghinhdrghgrnhhtohhishessghoohhtlhhinhdrtghomheqnecuggftrfgrthhtvghrnhepieethfejleejueduleffveejleefkeeiheffffefkefgtedtiedvvddtfeetgefhnecuffhomhgrihhnpeguvghvihgtvghtrhgvvgdrohhrghenucfkphepledtrdekledrudeifedruddvjeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeeltddrkeelrdduieefrdduvdejpdhhvghloheplgduledvrdduieekrddtrddufegnpdhmrghilhhfrhhomheprhhomhgrihhnrdhgrghnthhoihhssegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopehlihhnuhhsrdifrghllhgvihhjsehlihhnrghrohdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehkohhrhidrmhgrihhntggvnhhtsegsohhothhlihhnrdgtohhmpdhrtghpthhtoheplhhinhhugidqihdvtgesv hhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegrrhhnugesrghrnhgusgdruggvpdhrtghpthhtoheptghonhhorhdoughtsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehluhgtrgdrtggvrhgvshholhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtohepughrrghgrghnrdgtvhgvthhitgesrghmugdrtghomh 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. Reviewed-by: Conor Dooley Tested-by: Tomi Valkeinen 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..a8cb10f2d0df3fa5224f95f6f87467a8bce253bc --- /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 + - reg + - gpio-controller + - "#gpio-cells" + - "#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 896a307fa06545e2861abe46ea7029f9b4d3628e..4bb13de2b8ebad5180e2bde607dac40f35c51782 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23709,6 +23709,12 @@ 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