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. --- 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 (5): usb: Add support for Intel 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 Documentation: Add ABI doc for attributes of LJCA device .../ABI/testing/sysfs-bus-usb-devices-ljca | 36 + drivers/gpio/Kconfig | 12 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-ljca.c | 459 ++++++++ drivers/i2c/busses/Kconfig | 11 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-ljca.c | 355 +++++++ drivers/spi/Kconfig | 11 + drivers/spi/Makefile | 1 + drivers/spi/spi-ljca.c | 293 +++++ drivers/usb/misc/Kconfig | 13 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/ljca.c | 998 ++++++++++++++++++ include/linux/usb/ljca.h | 95 ++ 14 files changed, 2287 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/ljca.c create mode 100644 include/linux/usb/ljca.h -- 2.34.1
