[PATCH v1 0/2] mfd: nct6694: Refactor transport layer and add HIF (eSPI) support

From: a0282524688

Date: Thu Apr 02 2026 - 01:17:23 EST


From: Ming Yu <a0282524688@xxxxxxxxx>

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.

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 | 649 ++++++++++++++++++++++++++++
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, 829 insertions(+), 233 deletions(-)
create mode 100644 drivers/mfd/nct6694-hif.c

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2.34.1