[v10,0/4] Add Intel LJCA device driver

Message

Wu, Wentong Aug. 26, 2023, 11:13 p.m. UTC

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.

---
v10:
 - remove ljca_i2c_format_slave_addr
 - remove memset before write write w_packet
 - make ljca_i2c_stop void and print err message in case failure
 - use dev_err_probe in ljca_i2c_probe function

v9:
 - overhaul usb-ljca driver to make it more structured and easy understand
 - fix memory leak issue for usb-ljca driver
 - add spinlock to protect tx_buf and ex_buf
 - change exported APIs for usb-ljca driver
 - unify prefix for structures and functions for i2c-ljca driver
 - unify prefix for structures and functions for spi-ljca driver
 - unify prefix for structures and functions for gpio-ljca driver
 - update gpio-ljca, i2c-ljca and spi-ljca drivers according to usb-ljca's changes

Wentong Wu (4):
  usb: Add support for Intel LJCA device
  i2c: Add support for Intel LJCA USB I2C driver
  spi: Add support for Intel LJCA USB SPI driver
  gpio: update Intel LJCA USB GPIO driver

 drivers/gpio/Kconfig          |   4 +-
 drivers/gpio/gpio-ljca.c      | 242 +++++++------
 drivers/i2c/busses/Kconfig    |  11 +
 drivers/i2c/busses/Makefile   |   1 +
 drivers/i2c/busses/i2c-ljca.c | 332 +++++++++++++++++
 drivers/spi/Kconfig           |  11 +
 drivers/spi/Makefile          |   1 +
 drivers/spi/spi-ljca.c        | 297 +++++++++++++++
 drivers/usb/misc/Kconfig      |  14 +
 drivers/usb/misc/Makefile     |   1 +
 drivers/usb/misc/usb-ljca.c   | 817 ++++++++++++++++++++++++++++++++++++++++++
 include/linux/usb/ljca.h      | 113 ++++++
 12 files changed, 1741 insertions(+), 103 deletions(-)
 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