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Add Intel LJCA device driver

From:  Wentong Wu <wentong.wu-AT-intel.com>
To:  gregkh-AT-linuxfoundation.org, arnd-AT-arndb.de, mka-AT-chromium.org, oneukum-AT-suse.com, lee-AT-kernel.org, wsa-AT-kernel.org, kfting-AT-nuvoton.com, broonie-AT-kernel.org, linus.walleij-AT-linaro.org, maz-AT-kernel.org, brgl-AT-bgdev.pl, linux-usb-AT-vger.kernel.org, linux-i2c-AT-vger.kernel.org, linux-spi-AT-vger.kernel.org, linux-gpio-AT-vger.kernel.org, andriy.shevchenko-AT-linux.intel.com, heikki.krogerus-AT-linux.intel.com, andi.shyti-AT-linux.intel.com, sakari.ailus-AT-linux.intel.com, bartosz.golaszewski-AT-linaro.org, srinivas.pandruvada-AT-intel.com
Subject:  [PATCH v12 0/4] Add Intel LJCA device driver
Date:  Fri, 01 Sep 2023 13:36:13 +0800
Message-ID:  <1693546577-17824-1-git-send-email-wentong.wu@intel.com>
Cc:  zhifeng.wang-AT-intel.com, Wentong Wu <wentong.wu-AT-intel.com>
Archive-link:  Article

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

-- 
2.7.4



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