Add driver for Intel La Jolla Cove Adapter (LJCA) device. This is a USB-GPIO, USB-I2C and USB-SPI device. We add 4 drivers to support this device: a USB driver, a GPIO chip driver, a I2C controller driver and a SPI controller driver. --- v8: - ljca: use READ_ONCE to make the value of ibuf consistent. - gpio: inplement get_direction callback. - gpio: move kconfig item into `USB GPIO expanders` menu. v7: - ljca: remove unused field `udev` in struct ljca_dev. - ljca: rename ljca module name to usb-ljca. - ljca: use CONFIG_ACPI to enclose acpi related code. - ljca/gpio/i2c/spi: align MACRO defination. v6: - ljca: split LJCA USB driver into two commits: USB part and API part. - gpio/i2c/spi: use auxiliary bus for sub-module device enumeration instead of MFD. - move document patch for LJCA sysfs entry to the 3th patch of this patch series. - ljca: fix potential race condition when wait response timeout. - ljca: use devm_kzalloc to malloc ljca device struct. v5: - move ljca.h from drivers/include/mfd to drivers/include/usb. - ljca: fix a potential memory leak issue. - add a blank line before return to adust to kernel code style. - ljca: sysfs: split "cmd" to "ljca_dfu" and "ljca_trace_level". v4: - move ljca.c from drivers/mfd to drivers/usb/misc folder. - fix index warning in sysfs-bus-devices-ljca. v3: - spi: make ljca_spi_transfer inline and fix an endian issue. v2: - ljca: remove reset command. - gpio/spi/i2c: add `default MFD_LJCA` in Kconfig. - gpio: add "select GPIOLIB_IRQCHIP" in Kconfig. Ye Xiang (6): usb: Add support for Intel LJCA device usb: ljca: Add transport interfaces for sub-module drivers Documentation: Add ABI doc for attributes of LJCA device gpio: Add support for Intel LJCA USB GPIO driver i2c: Add support for Intel LJCA USB I2C driver spi: Add support for Intel LJCA USB SPI driver .../ABI/testing/sysfs-bus-usb-devices-ljca | 36 + drivers/gpio/Kconfig | 12 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-ljca.c | 479 ++++++++ drivers/i2c/busses/Kconfig | 11 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-ljca.c | 350 ++++++ drivers/spi/Kconfig | 11 + drivers/spi/Makefile | 1 + drivers/spi/spi-ljca.c | 290 +++++ drivers/usb/misc/Kconfig | 14 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/usb-ljca.c | 1068 +++++++++++++++++ include/linux/usb/ljca.h | 102 ++ 14 files changed, 2377 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-usb-devices-ljca create mode 100644 drivers/gpio/gpio-ljca.c create mode 100644 drivers/i2c/busses/i2c-ljca.c create mode 100644 drivers/spi/spi-ljca.c create mode 100644 drivers/usb/misc/usb-ljca.c create mode 100644 include/linux/usb/ljca.h -- 2.34.1
