From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 80B9241B367 for ; Fri, 15 May 2026 08:58:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778835485; cv=none; b=MTiX5K7zUkdtH1A6IX7uT3o45eH8x34eLpCZ+n67i0EKFdyW2rZOm5vcUVdWNzFyXRZWURQvsnWB1tIkMMJ0F9Z8vAD0pDBR0qcj4pcttg/Wql/Q/lbYr1Grt7HtpIHcjP/oM39lvNcEl3gAmsHNSL3EOUcwUvbWEUE5sgNl7ig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778835485; c=relaxed/simple; bh=dyP4n9uPfOXLtZxIOJmI/uU/nI5UYjP6DCnh6DbN2Hc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XC8qy5UeiehWCfCWFXdu3KDKEOzl5sUP0GvLxRI6IFuLoTXnJVZjosVY1ic+yjaAa2muGVGrMxMnVzefD2Vi7hI3uSbBUjHNDo6oQYw4lbxF1GymAcEn8tUORc+Drms1xUAY5RSNOjsE+MiKU6r99cyZkBc25jn2X8nRlLgVaTo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=IwdJwuu3; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IwdJwuu3" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-2b45cb89f7eso57247065ad.0 for ; Fri, 15 May 2026 01:58:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1778835483; x=1779440283; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=JI5rbOuDA7OsqPK6rS6KZm2RpgqeyURJ5czLB7dxhv4=; b=IwdJwuu3fbspKY4M46qwfE07A8WvFOSz4mMgl34oOxhRdGNhwzqBAkAzgmDJONgcWO /rfrYcNtRiGEnyAdrmqYH84LLCQeREjdpE0zwj5994JUXOoj/DAkMppV2j5NZuXIPy/Z CAFd7/E9sd+mjo+k5Nh9NvOcNjYIuF/OZ+Fisj83doFwXoSObViUphY97xLhYncQSPUL VVtx2JdUsemqY9xKlxSj8mwZz7fPIlHoJFxZea9sY4qW5mhQiYPX7IhVOIB7DpFKo0sY igrikZblRT7S9fnn8mpMayBfG/pL35ZYWfBObHkmDZ5RJKXklCdxeH9Bg0OAftjaCVKH F+lA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778835483; x=1779440283; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=JI5rbOuDA7OsqPK6rS6KZm2RpgqeyURJ5czLB7dxhv4=; b=O2iI+mRHFknSjrpXiiBVSU6m82UV2HtohPmIOvFMGxDSbUIAiaEllAX90o3vTL/iFu n42Vf4X9GfDrKiNfH8u/1lEUejHyek75zNK6CHUhZeqoMlYF7/JC42jBNAiXjB4XDx8U Ev+UQ3n9M00N4TkHeQf4TGys5DJuRTNFlYCosxOHVZkNu1IBq1FSkj9CnX6BvDvkA7jv OpXTZKal50oh1w40/IjRdKVticR7PDCeQoU08kP/xbgNn8dsGrdSemlYm97bZRuFERtq S6384ajI1Q43AxfsicNUkgQL5An115stO2vnNmnltwUzQiQ0B4W1df8+Jk6l1RlfpwDW vDtw== X-Gm-Message-State: AOJu0YyCS4j1dRgrAdMDlAva/QZ2NdPo73geaDq0XhuE9+q3X0V6lJpj xTYjjPJ9Gpb77pvZlHzxVrrZq37F9GVFUNwx/k1owCchBcyPCttcBNfm X-Gm-Gg: Acq92OH+PuXw9KQE2n5liYKY7Nr9Hm0Zz6oZkBJ6iqNkrZAZ/9sC58IfBaQb5SiIgP/ aaVSJYLqlsoqCGk3FRSguqhLqVkXfR3X41sRN//ebQrozTxDayLA8Wx5dJQJU9WOP6M9sxO4NQ0 dCr0WVPgZ59LoxbcIM05FZ5mf/G2K11/rd98PL9kxNEG+v4HAlFI+IcgHAvBOnHT+qXsLONpQzf VsLgOoT17xqV0U+iLNc18IwcHmLjg+z7O3F960nKmTCyxmqJz4rNefyKYLR6/BUYqwLUk75NAoE m/aPc6Y0mvxE9sd+89zNC13OrTdXllP2ana4iJWUXLd77tbODWV1PtxYmTUlOt5SZf+VAiXoQxD DZMiWCeFj31WvhcrX2ORa+OJmFXV+q+5dEDE0xqrKfYQBvn2ltITjEIZmQ2ruh+xfoeDvtlkDtq pBUOl9eCYVzlakSk0REbq3dG+4e7M8TvY02T9bh2o7T8WtJ8NnMxCeZtVRwAtXU+/wMg== X-Received: by 2002:a17:903:390b:b0:2bd:1903:6ced with SMTP id d9443c01a7336-2bd7e93cf74mr34268585ad.41.1778835482629; Fri, 15 May 2026 01:58:02 -0700 (PDT) Received: from hcdev-d520mt2.. (60-250-196-139.hinet-ip.hinet.net. [60.250.196.139]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2bd5cfe6512sm52249325ad.52.2026.05.15.01.57.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 May 2026 01:58:02 -0700 (PDT) From: a0282524688@gmail.com To: tmyu0@nuvoton.com, linusw@kernel.org, brgl@kernel.org, linux@roeck-us.net, andi.shyti@kernel.org, lee@kernel.org, mkl@pengutronix.de, mailhol@kernel.org, alexandre.belloni@bootlin.com, wim@linux-watchdog.org Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-rtc@vger.kernel.org, linux-usb@vger.kernel.org, Ming Yu Subject: [PATCH v4 0/1] mfd: nct6694: Refactor transport layer and add HIF (eSPI) support Date: Fri, 15 May 2026 16:57:45 +0800 Message-Id: <20260515085746.114361-1-a0282524688@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ming Yu The Nuvoton NCT6694 is a peripheral expander that provides GPIO, I2C, CAN-FD, Watchdog, HWMON, PWM, and RTC sub-devices. Currently, the driver only supports USB as the host transport interface. This series refactors the NCT6694 MFD core to support multiple transport backends and adds a new Host Interface (HIF) transport driver that communicates over eSPI using Super-I/O shared memory. Changes since version 3: - Remove redundant module type macro definitions from sub-device drivers that are now provided by the shared header , fixing -Wmacro-redefined warnings. Changes since version 2: - Restore per-device IDA and mfd_add_hotplug_devices()/PLATFORM_DEVID_AUTO to avoid child device ID conflicts with multiple NCT6694 chips. - Validate irq_find_mapping() return value before dispatching IRQs. - Check superio_enter() return value in nct6694_irq_init(). Changes since version 1: - Reworked the Super-I/O access helpers. Ming Yu (1): mfd: Add Host Interface (HIF) support for Nuvoton NCT6694 MAINTAINERS | 1 + drivers/gpio/gpio-nct6694.c | 7 - drivers/hwmon/nct6694-hwmon.c | 21 - drivers/i2c/busses/i2c-nct6694.c | 7 - drivers/mfd/Kconfig | 47 +- drivers/mfd/Makefile | 3 +- drivers/mfd/nct6694-hif.c | 663 ++++++++++++++++++++++++++++ drivers/mfd/nct6694.c | 111 +++-- drivers/net/can/usb/nct6694_canfd.c | 6 - drivers/rtc/rtc-nct6694.c | 7 - drivers/watchdog/nct6694_wdt.c | 7 - include/linux/mfd/nct6694.h | 54 ++- 12 files changed, 813 insertions(+), 121 deletions(-) create mode 100644 drivers/mfd/nct6694-hif.c -- 2.34.1