[PATCH v12 0/4] Add Intel LJCA device driver

Wentong Wu
2023-09-01T05:36:47Z

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.

---
v12:
- switch dev_err to dev_dbg for i2c-ljca driver
- avoid err printing because of calling usb_kill_urb when
attempts to resubmit the rx urb

v11:
- switch dev_err to dev_dbg for i2c-ljca driver
- remove message length check because of defined quirk structure
- remove I2C_FUNC_SMBUS_EMUL support

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 | 246 +++++++------
drivers/i2c/busses/Kconfig | 11 +
drivers/i2c/busses/Makefile | 1 +
drivers/i2c/busses/i2c-ljca.c | 326 +++++++++++++++++
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, 1737 insertions(+), 105 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

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2.7.4