[PATCH v4 0/6] can: etas_es58x: report firmware, bootloader and hardware version

[Vincent Mailhol <mailhol.vincent@wanadoo.fr>]

The goal of this series is to report the firmware version, the
bootloader version and the hardware revision of ETAS ES58x
devices.

These are already reported in the kernel log but this isn't best
practice. Remove the kernel log and instead export all these through
devlink. In addition, the firmware version is also reported through
ethtool.

---
* Changelog *

v3 -> v4:

  * major rework to use devlink instead of sysfs following Andrew's
    comment.

  * split the series in 6 patches.

  * [PATCH 1/6] add Acked-by: Greg Kroah-Hartman

v2 -> v3:

  * patch 2/3: do not spam the kernel log anymore with the product
    number. Instead parse the product information string, extract the
    firmware version, the bootloadar version and the hardware revision
    and export them through sysfs.

  * patch 2/3: rework the parsing in order not to need additional
    fields in struct es58x_parameters.

  * patch 3/3: only populate ethtool_drvinfo::fw_version because since
    commit edaf5df22cb8 ("ethtool: ethtool_get_drvinfo: populate
    drvinfo fields even if callback exits"), there is no need to
    populate ethtool_drvinfo::driver and ethtool_drvinfo::bus_info in
    the driver.

v1 -> v2:

  * was a single patch. It is now a series of three patches.
  * add a first new patch to export  usb_cache_string().
  * add a second new patch to apply usb_cache_string() to existing code.
  * add missing check on product info string to prevent a buffer overflow.
  * add comma on the last entry of struct es58x_parameters.

Vincent Mailhol (6):
  USB: core: export usb_cache_string()
  can: etas_es58x: add devlink support
  can: etas_es58x: export product information through
    devlink_ops::info_get()
  can: etas_es58x: remove es58x_get_product_info()
  can: etas_es58x: report the firmware version through ethtool
  Documentation: devlink: add devlink documentation for the etas_es58x
    driver

 .../networking/devlink/etas_es58x.rst         |  33 +++
 MAINTAINERS                                   |   1 +
 drivers/net/can/usb/Kconfig                   |   1 +
 drivers/net/can/usb/etas_es58x/Makefile       |   2 +-
 drivers/net/can/usb/etas_es58x/es58x_core.c   |  85 +++----
 drivers/net/can/usb/etas_es58x/es58x_core.h   |  73 ++++++
 .../net/can/usb/etas_es58x/es58x_devlink.c    | 207 ++++++++++++++++++
 drivers/usb/core/message.c                    |   1 +
 drivers/usb/core/usb.h                        |   1 -
 include/linux/usb.h                           |   1 +
 10 files changed, 352 insertions(+), 53 deletions(-)
 create mode 100644 Documentation/networking/devlink/etas_es58x.rst
 create mode 100644 drivers/net/can/usb/etas_es58x/es58x_devlink.c

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2.37.4