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[60.250.196.139]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b27472d098sm181673475ad.13.2026.04.07.22.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Apr 2026 22:30:54 -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 v2 0/2] mfd: nct6694: Refactor transport layer and add HIF (eSPI) support Date: Wed, 8 Apr 2026 13:30:35 +0800 Message-Id: <20260408053037.1867092-1-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 1: - Reworked the Super-I/O access helpers. Ming Yu (2): mfd: nct6694: Switch to devm_mfd_add_devices() and drop IDA mfd: Add Host Interface (HIF) support for Nuvoton NCT6694 MAINTAINERS | 1 + drivers/gpio/gpio-nct6694.c | 26 +- drivers/hwmon/nct6694-hwmon.c | 21 - drivers/i2c/busses/i2c-nct6694.c | 26 +- drivers/mfd/Kconfig | 47 ++- drivers/mfd/Makefile | 3 +- drivers/mfd/nct6694-hif.c | 634 ++++++++++++++++++++++++++++ drivers/mfd/nct6694.c | 180 ++++---- drivers/net/can/usb/nct6694_canfd.c | 18 +- drivers/rtc/rtc-nct6694.c | 7 - drivers/watchdog/nct6694_wdt.c | 27 +- include/linux/mfd/nct6694.h | 57 ++- 12 files changed, 814 insertions(+), 233 deletions(-) create mode 100644 drivers/mfd/nct6694-hif.c -- 2.34.1