From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from polaris.svanheule.net (polaris.svanheule.net [84.16.241.116]) (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 D3B952DE717 for ; Wed, 19 Nov 2025 20:03:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.16.241.116 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763582600; cv=none; b=tauV5AFVIM0S6bfbsEuI0EUIQuo1uyPlWji6kIdklu37UnJPZ5qV50zEZqVsK+EoicRpuuODvG8bybEQGlXIZcCgQQI3VQCubk6QJ9vO7rc9hhISOiOI0178fIc0mYSeD/T7ocsqfum/sx4qml5jz6EYj5HF9AslmPkV2HPfnHY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763582600; c=relaxed/simple; bh=GCif+pKF/lsX6EjX8V714yeWZ7HYffEyJjgwmzBFFm8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=P0wDAxu+uSDXBR7SpviCm1eE4Ugrp01ZV+AB1DTYvK7LfTSC7ChDdfBySqvepLwZzIMbvVZZkHD3yjEIS4nzSIcIP3dZcZxFdtVkVAUxEfa5n4kQmFrn4LUu+76l2x11MgBp2OATuQiryVedJY9Gisr4YcFucvoAJOr6ZcXZOWs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=svanheule.net; spf=pass smtp.mailfrom=svanheule.net; dkim=pass (2048-bit key) header.d=svanheule.net header.i=@svanheule.net header.b=9U12hHwI; arc=none smtp.client-ip=84.16.241.116 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=svanheule.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=svanheule.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=svanheule.net header.i=@svanheule.net header.b="9U12hHwI" Received: from terra.vega.svanheule.net (2a02-1812-162c-8f00-1e2d-b404-3319-eba8.ip6.access.telenet.be [IPv6:2a02:1812:162c:8f00:1e2d:b404:3319:eba8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sander@svanheule.net) by polaris.svanheule.net (Postfix) with ESMTPSA id 6DF9B6A1E96; Wed, 19 Nov 2025 21:03:14 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svanheule.net; s=mail1707; t=1763582594; 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=mHCRlCQgVco9K9Myzqy8krKvkuBmOsAKoOiEI0pkqs8=; b=9U12hHwIJ04WrHQ70REUgyFM4oYndegIH1OJvG+sFlYrIX3lCBJJGOOU/Gg10g6nolP2uS Dax9jbS81eMoILi31kKLHV8lW+KJBtBUqBhanOKBjoXQ9GPZfK5hs+h6ryXzrAXPCSS2Zv Mh9PdgOKGkxbiPwUNM6Vkdh5aoCxyf14iYW51K1OrHpg1AEKRn8gbIiK4mb8uYLrlXfHph ZkIhmqJ2bYg4mXz5j4dqj1QTQI+FIyG8H8yKsEsGUsdvyAcBse3hO3mKzkXd/fvc0vV3Iq h8vV5dTgEIyh4ilTuaAr0lqh9aEpz7q6Shjp381hyPx/q5ypMG+OariU3EkVyw== From: Sander Vanheule To: Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Michael Walle , Bartosz Golaszewski Cc: linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Sander Vanheule Subject: [PATCH v8 0/6] RTL8231 GPIO expander support Date: Wed, 19 Nov 2025 21:02:59 +0100 Message-ID: <20251119200306.60569-1-sander@svanheule.net> X-Mailer: git-send-email 2.51.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The RTL8231 GPIO and LED expander can be configured for use as an MDIO or SMI bus device. Currently only the MDIO mode is supported, although SMI mode support should be fairly straightforward, once an SMI bus driver is available. Provided features by the RTL8231: - Up to 37 GPIOs - Configurable drive strength: 8mA or 4mA (currently unsupported) - Input debouncing on GPIOs 31-36 - Up to 88 LEDs in multiple scan matrix groups - On, off, or one of six toggling intervals - "single-color mode": 2×36 single color LEDs + 8 bi-color LEDs - "bi-color mode": (12 + 2×6) bi-color LEDs + 24 single color LEDs - Up to one PWM output (currently unsupported) - Fixed duty cycle, 8 selectable frequencies (1.2kHz - 4.8kHz) The patches have been in use downstream by OpenWrt for some months. As the original patches are already a few years old, I would like to request all patches to be reviewed again (and I've dropped all provided tags and changelogs until v6). --- Changes since v6: Link: https://lore.kernel.org/lkml/20251021142407.307753-1-sander@svanheule.net/ - Drop already merged regmap_gpio changes - Devicetree bindings: - Relax description formatting - Use absolute paths for schema references - Enforce address format for led node names - Add pinctrl properties to led-controller node in example - mfd driver: - Small code refactors, variable renames - Header include sorting - regmap/regcache usage updates - pinctrl driver: - Fixed build issue on 64b platforms - Simplify safe direction startup config - Add GPIOLIB dependency RFC for gpio-regmap changes: Link: https://lore.kernel.org/lkml/20251020115636.55417-1-sander@svanheule.net/ Patch series v5 (June 2021): Link: https://lore.kernel.org/lkml/cover.1623532208.git.sander@svanheule.net/ Sander Vanheule (6): dt-bindings: leds: Binding for RTL8231 scan matrix dt-bindings: mfd: Binding for RTL8231 mfd: Add RTL8231 core device pinctrl: Add RTL8231 pin control and GPIO support leds: Add support for RTL8231 LED scan matrix MAINTAINERS: Add RTL8231 MFD driver .../bindings/leds/realtek,rtl8231-leds.yaml | 136 +++++ .../bindings/mfd/realtek,rtl8231.yaml | 199 +++++++ MAINTAINERS | 10 + drivers/leds/Kconfig | 10 + drivers/leds/Makefile | 1 + drivers/leds/leds-rtl8231.c | 285 ++++++++++ drivers/mfd/Kconfig | 9 + drivers/mfd/Makefile | 1 + drivers/mfd/rtl8231.c | 193 +++++++ drivers/pinctrl/Kconfig | 12 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-rtl8231.c | 533 ++++++++++++++++++ include/linux/mfd/rtl8231.h | 71 +++ 13 files changed, 1461 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/realtek,rtl8231-leds.yaml create mode 100644 Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml create mode 100644 drivers/leds/leds-rtl8231.c create mode 100644 drivers/mfd/rtl8231.c create mode 100644 drivers/pinctrl/pinctrl-rtl8231.c create mode 100644 include/linux/mfd/rtl8231.h -- 2.51.1