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 903A7322B81 for ; Mon, 15 Dec 2025 17:51:29 +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=1765821093; cv=none; b=TD/gjKOUQHOpptWKVo4LjuKy3Y5NNv6iaXvytyNU1SqTodaBwBR/1S8zANe9WL2SCf3ND5kDEkvSmW+qgNVx+yEvGsFb/NpeO/SoXoeWhNC5wofc5AmiyEtBd2IifZ0FLBMyRfUN4by+aLWoD2aE/rKtTaMdw8xqs3KRqi1hlz0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765821093; c=relaxed/simple; bh=hGESFDHN0cScS8HX+PUDAVWfBBgxxynfSPIQOpSViA8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=K+7PLp2sWlJRvp0+tE2c6FYJbXAokfb0CN1FeR3akpeAza7pGryhmF8rWRxvY0bv/X+a/9VwatXsHMrLQUdQECJnPg4n/LQXdbd9C67M92YF2g73T1evYLyDPTZ3N9GL2A5zcVP+BzA8IGqnppum+TNDAOk+7wU7dSxo2Z9xStk= 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=P0uuvtuo; 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="P0uuvtuo" 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 94F186B1FA2; Mon, 15 Dec 2025 18:51:21 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svanheule.net; s=mail1707; t=1765821082; 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=PWl1EwvinAHVTukioGc0f8nDw4G1d0vgl+v+BhLtPtY=; b=P0uuvtuoGH9ZF+BF55NOtW8Fnw7NA2+uq808mfAvxGEjNGzo1owS/Wxj9K9F3DeBjesEy5 BYVbVyJ1xPoRfw+iW/bV+UFrWdFi9zIGs73dkBAG1+IJtuiTsAVnbUo17cBVaDMdFY/LyM qcS13qUzACyjyo0sPNH6ac/BYQeQmq1h3DQgKrL7+JEalMspeJQ/FmkY/0FWVb4oVGA7bw kEch30x2SsYmZgtlpkamXIi1A6U95uldN2mDBv1/AysnvWv05qosQWqux95t2yhDTv1cTt q6YrzE5o0kwJLdCzDJhgKNQ1g+MwtwhaxlWRClsp9cNdJ6dF5H5CqtBntg0VCg== 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 v9 0/6] RTL8231 GPIO expander support Date: Mon, 15 Dec 2025 18:51:08 +0100 Message-ID: <20251215175115.135294-1-sander@svanheule.net> X-Mailer: git-send-email 2.52.0 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 v8: Link: https://lore.kernel.org/lkml/20251119200306.60569-1-sander@svanheule.net/ - Rebase on top of v6.19-rc1 - Drop no longer needed __maybe_unused for PM functions - No abbreviations in user messages - Replace {0,RTL8231_REG_COUNT-1} with RTL8231_REG_{START,END} - Replace led_start regmap_field with direct regmap operations - Replace SIMPLE_DEV_PM_OPS with DEFINE_SIMPLE_DEV_PM_OPS - Switch to REGCACHE_FLAT_S for improved cache performance Changes since v7: Link: https://lore.kernel.org/lkml/20251117215138.4353-1-sander@svanheule.net/ - All drivers can now be built independently with COMPILE_TEST - Fix storage size of pinfunction flags in a more compatible way - Add missing OF dependency to pinctrl driver - Improve referenced properties in bindings 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 | 188 ++++++ drivers/pinctrl/Kconfig | 12 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-rtl8231.c | 533 ++++++++++++++++++ include/linux/mfd/rtl8231.h | 73 +++ 13 files changed, 1458 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 -- 2.52.0