[PATCH v3 0/1] mfd: nct6694: Refactor transport layer and add HIF (eSPI) support

[a0282524688@gmail.com]

From: Ming Yu <a0282524688@gmail.com>

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 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/mfd/Kconfig         |  47 ++-
 drivers/mfd/Makefile        |   3 +-
 drivers/mfd/nct6694-hif.c   | 663 ++++++++++++++++++++++++++++++++++++
 drivers/mfd/nct6694.c       | 111 ++++--
 include/linux/mfd/nct6694.h |  54 +--
 6 files changed, 813 insertions(+), 66 deletions(-)
 create mode 100644 drivers/mfd/nct6694-hif.c

-- 
2.34.1