From patchwork Mon Nov 25 08:45:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 845486 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) (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 A780618A95A; Mon, 25 Nov 2024 08:45:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732524336; cv=none; b=ZmfH98PityVz/hm/DSsg/ki9pztHHw1BBvw7/28Ec1xcBB8J1pG7brPV5QaAdk6Ve+3ytEemtzeQLElNNlGcsT4NCcVuoOSStoaA0OLn3QUjBYl7sqofzV8UFwNBc3uvFOFOBpv2e7k7I9uh17JpfLd/zwIUmYol3G1VUsUnedU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732524336; c=relaxed/simple; bh=lJwVS70v3SVo849D24NQ+rHlsxNtn9U5Tb4DJEULkZQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Q0Kl4rt8T61oNHOTdqkMUJJSjVjORPpEsxBu6f6pPEIPmjsqwxelc23uYu1+3IjZolDGvFNkmHo7WwL0/9DUkFBQi+MChLc3hhv+nA5d4nnLdaYKVnHKK5f7dH6IkxwVKPaWJG+LOdP/MQpIUN3aV9EM/QqtLqZlaoZCxrVhjYI= 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=ZSxjbz+w; arc=none smtp.client-ip=217.70.183.201 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="ZSxjbz+w" Received: by mail.gandi.net (Postfix) with ESMTPSA id 982751BF209; Mon, 25 Nov 2024 08:45:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1732524330; 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; bh=ia3Rtg8suGGbEgeGtI6bMKQYuwy5zPE5EYeOCxo1k80=; b=ZSxjbz+wvLN0WDnB48hKLTWmaFX2E909P7klwppPN4lP3GrB0sD8Ab6jnSAGCbVEdAYq7X peOF2fC2V1T5zDGVSfZS0rGZpeZJSyTQA/dn+lZjpxSHsyAPQ1fyhpAkErxmK+ncZo+I5e AueQ27DuCwMWX1UEL/0YZaIYeghgi4T3IdyRHnIjLjXNjyTpE7sGjx+fHua0TJpU0r/m5Z uyhMDgZ7edyr6Uav25qKcTBX04LvbhmeyNSMaODWvuoVeu5hJ2+BMzSzd+jq5Mf77IH99K DeN4MI/1T0tVbstV5pMW0FjfVByffz2szzJ+xPXZ1k+F3qXvlm+MK9e22Q/edA== From: Romain Gantois Subject: [PATCH v3 0/9] misc: Support TI FPC202 dual-port controller Date: Mon, 25 Nov 2024 09:45:14 +0100 Message-Id: <20241125-fpc202-v3-0-34e86bcb5b56@bootlin.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIABs5RGcC/1WMQQ6CMBBFr0K6tqYzNJS64h7GBZSpNFFKWtJoC He3YIy6+28y7y0sUnAU2alYWKDkovNjhvJQMDO045W46zMzFChBgOJ2MnnzyopOlTpvVbP8PAW y7rGHzpfMg4uzD8+9m2C7vhMg6k8iARfckkRT6bozGpvO+/nmxqPxd7ZFEv6I8BUxi0pKkhY0t tj/i+u6vgC4ORTF1wAAAA== X-Change-ID: 20241017-fpc202-6f0b739c2078 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 Hello everyone, This is version three of my series which adds support for the TI FPC202 dual-port controller. This is an unusual kind of device which is used as a low-speed signal aggregator for various types of SFP-like hardware ports. The FPC202 exposes an I2C, or SPI (not supported in this series) control interface, which can be used to access two downstream I2C busses, along with a set of low-speed GPIO signals for each port. It also has I2C address translation (ATR) features, which allow multiple I2C devices with the same address (e.g. SFP EEPROMs at address 0x50) to be accessed from the upstream control interface on different addresses. I've chosen to add this driver to the misc subsystem, as it doesn't strictly belong in either the i2c or gpio sybsystem, and as far as I know it is the first device of its kind to be added to the kernel. Along with the FPC202 driver itself, this series also adds support for dynamic address translation to the i2c-atr module. This allows I2C address translators to update their translation table on-the-fly when they receive transactions to unmapped clients. This feature is needed by the FPC202 driver to access up to three logical I2C devices per-port, given that the FPC202 address translation table only has two address slots. Best Regards, Romain Signed-off-by: Romain Gantois --- Changes in v3: - Described the "reg" property of downstream ports in the FPC202 bindings - Link to v2: https://lore.kernel.org/r/20241118-fpc202-v2-0-744e4f192a2d@bootlin.com Changes in v2: - Renamed port nodes to match i2c adapter bindings. - Declared atr ops struct as static const. - Free downstream ports during FPC202 removal. - Link to v1: https://lore.kernel.org/r/20241108-fpc202-v1-0-fe42c698bc92@bootlin.com --- Romain Gantois (9): dt-bindings: misc: Describe TI FPC202 dual port controller media: i2c: ds90ub960: Replace aliased clients list with bitmap media: i2c: ds90ub960: Protect alias_use_mask with a mutex i2c: use client addresses directly in ATR interface i2c: move ATR alias pool to a separate struct i2c: rename field 'alias_list' of struct i2c_atr_chan to 'alias_pairs' i2c: support per-channel ATR alias pools i2c: Support dynamic address translation misc: add FPC202 dual port controller driver .../devicetree/bindings/misc/ti,fpc202.yaml | 96 +++++ MAINTAINERS | 7 + drivers/i2c/i2c-atr.c | 480 ++++++++++++++------- drivers/media/i2c/ds90ub913.c | 9 +- drivers/media/i2c/ds90ub953.c | 9 +- drivers/media/i2c/ds90ub960.c | 65 +-- drivers/misc/Kconfig | 11 + drivers/misc/Makefile | 1 + drivers/misc/ti_fpc202.c | 440 +++++++++++++++++++ include/linux/i2c-atr.h | 67 ++- 10 files changed, 989 insertions(+), 196 deletions(-) --- base-commit: adc218676eef25575469234709c2d87185ca223a change-id: 20241017-fpc202-6f0b739c2078 Best regards,