On Mon, 20 Feb 2023, Ye Xiang wrote:
> This patch implements the USB part of Intel USB-I2C/GPIO/SPI adapter
> device named "La Jolla Cove Adapter" (LJCA).
The "USB part" should live in drivers/usb.
You can use MFD to register each of the components, but all of the USB
functionality needs moving somewhere else.
> The communication between the various LJCA module drivers and the
> hardware will be muxed/demuxed by this driver. The sub-module of
> LJCA can use ljca_transfer() to issue a transfer between host
> and hardware.
>
> Each sub-module of LJCA device is identified by type field within
> the LJCA message header.
>
> The minimum code in ASL that covers this board is
> Scope (\_SB.PCI0.DWC3.RHUB.HS01)
> {
> Device (GPIO)
> {
> Name (_ADR, Zero)
> Name (_STA, 0x0F)
> }
>
> Device (I2C)
> {
> Name (_ADR, One)
> Name (_STA, 0x0F)
> }
>
> Device (SPI)
> {
> Name (_ADR, 0x02)
> Name (_STA, 0x0F)
> }
> }
>
> Signed-off-by: Ye Xiang <xiang.ye@xxxxxxxxx>
> ---
> drivers/mfd/Kconfig | 13 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/ljca.c | 977 +++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/ljca.h | 95 ++++
> 4 files changed, 1086 insertions(+)
> create mode 100644 drivers/mfd/ljca.c
> create mode 100644 include/linux/mfd/ljca.h
--
Lee Jones [李琼斯]
