From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (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 89E7B426D05 for ; Fri, 15 May 2026 08:58:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778835485; cv=none; b=iXLntOMbsDpMNWznmfJxYnz3BqmBrO3M6ollfkUM1yu12vptze/vt0KOGLbWEFaJI2itbx0SbZos1iZJfWKYYYNHTpDT2UwsfltH0u/y57Kda6lLa65SqgWfNHRhoO045R6NV6JsUW81NAbVHuuVIGXBQy0wppJ7i2VT/Fn+2Rw= 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=209.85.214.170 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-f170.google.com with SMTP id d9443c01a7336-2ba21d32776so61019325ad.2 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=fFUzy8ym+o4Bfuszoom3pGjQGqLrqfM77pJFp1y7jZZI2EmEsm0eOveSq0/OrjY7kk tweB6zpEkiNq9YZNL6X0VlUWGVQf1nW20jWjX0t4BD4TqHchHj9l1hEv6nktOf8C1yc0 Ql9ZHpQa3tylrsF4cFVpdz6fHnlL+X7rQjTW7kMWjGjJOfgcgVWcu3YqqXu/hx66Iw9p 2C/neHbv3xyUdafW9FrG6l48FT4j9qVexlo7KetPw+4EnBeJRcqac3zECaZBjF3DM8u5 jpek3h9roX2Kw3VFbEmQ1piIXu+Oeqbrx+w76EmqPHsr/h53E4ukKb3jpxRDQldu0Z/d W2Jg== X-Forwarded-Encrypted: i=1; AFNElJ9KTbOK4gJeiEG/936RVKdqqucE8sEtkPwpT3JIGbqzDVWM6JouuTTfjhVVpVit92xOfdUOo0d4x7U=@vger.kernel.org X-Gm-Message-State: AOJu0Yyv1nXDnLxGfW6TekYViL1kJU5jlPSLT7E57RyiYfIm3m6ded+w rOOqvJF0oBfR+8XU8FbaVvNJ65NfY9Hy0V/NHEPnS4WUPHRfChTLCzij X-Gm-Gg: Acq92OEWH83Y+2Oc1KY0hXxVrhhIMEI8TWoJIvnJrlYtJoPv9fso2jQiLHcECVhJTKK L7q2zlnWASJdklAZ4Ynf5wRR4eFebEitJCh3LQIsXJsD0jBLqXYE5P9B2gasXZmoAFaWT1xrjvz YihL8pP/V4qDw9Is3WhOXjpfwnqukctdyGqo2ykmMVp6DpGOqvVHUpBLdsclErqFBrHJXZbo9Dc FLlBmTizB9rsxSIsSzFSk5iYOaOEObSVULg5G8M2A8I3h8IgDuXAVfFbLKLtvnw1yPGRgwGkpnF iHcpVNKbidZEmoaKFsxg87NSe7eD358FhYZrTb8io6apc6CwJNHH9gniw/GVSvheAk8o1JPn6/e BsfoitqU8PK2CfQhs75D9cmhWlNJwcC7qJKufqH+4I1ljcSyU55QUCByWKyquyBCN8EhHh8siYu 3YIxEc6Mtn6MixatLRDOe0KX42M0XmXI6O44wfYpEdA537yfbatjlB9DX6zx8jjpQaog== 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-rtc@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