linux-kernel - [PATCH v3 0/8] mfd / platform: cros_ec: move cros

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Date:   Tue, 27 Nov 2018 13:18:41 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     lee.jones@...aro.org
Cc:     gwendal@...omium.org, drinkcat@...omium.org,
        linux-kernel@...r.kernel.org, groeck@...omium.org,
        kernel@...labora.com, bleung@...omium.org,
        Olof Johansson <olof@...om.net>
Subject: [PATCH v3 0/8] mfd / platform: cros_ec: move cros_ec sysfs attributes to its own drivers.

Hi,

This is quick respin of the previous version because I introduced a
build problem between patch 3 and 6 due a wrong squash on my side. Sorry
about that. I also take this opportunity to do some few cleanups.

This is another patchset to try to cleanup a bit more the crossed
references for cros-ec driver between the MFD and the platform/chrome
subsystems.

The purpose of these patches is get rid of the different cros-ec attributes
from mfd/cros_ec_dev to its own sub-driver in platform/chrome. cros_ec_dev
continues instantiating the sub-devices but the sysfs attributes are owned
by the platform driver.E.g. The lightbar driver should own his sysfs
attributes and be instantiated only if the Embedded Controller has a
lightbar.

The patchset also adds the documentation of the sysfs attributes.

Most of the patches touches mfd subsystem and platform/chrome so I'd
suggest go all using and inmutable branch.

Waiting for your feedback. Best regards,
 Enric

Changes in v3:
- Removed cros_ec_remove from include file.
- Removed unneded check for ec_dev.
- Fixed build error as reported by the kbuild test robot.
- Do not print ec_platform name as is with dev_err is enough.

Changes in v2:
- Use devm only for the cros-ec core.
- Removed the two exported functions to attach/detach to the cros_class.
- Create the attributes directly instead of use the attach/detach callbacks.
- Add a "default MFD_CROS_EC_CHARDEV" in Kconfig for this.
- Removed the checks for missing debug_info, are not needed now.
- Removed a comment that no longer applies.
- Removed unnecessary IS_ENABLED.
- Removed dev_err message telling that VBC is found.
- Use dev_warn instead of dev_err as the error is ignored.
- Removed ec_with_lightbar variable.
- Fix WARN when unloading. This is new in these series.

Enric Balletbo i Serra (8):
  mfd / platform: cros_ec: use devm_mfd_add_devices.
  mfd / platform: cros_ec: move lightbar attributes to its own driver.
  mfd / platform: cros_ec: move vbc attributes to its own driver.
  mfd / platform: cros_ec: move debugfs attributes to its own driver.
  mfd / platform: cros_ec: move device sysfs attributes to its own
    driver.
  mfd / platform: cros_ec: instantiate only if th EC has a VBC NVRAM.
  platform/chrome: cros_ec_lightbar: instantiate only if the EC has a
    lightbar.
  mfd: cros_ec: add a dev_release empty method.

 .../ABI/testing/sysfs-class-chromeos          |  32 +++++
 ...sfs-class-chromeos-driver-cros-ec-lightbar |  74 ++++++++++
 .../sysfs-class-chromeos-driver-cros-ec-vbc   |   6 +
 drivers/mfd/Kconfig                           |   1 -
 drivers/mfd/cros_ec.c                         |  14 +-
 drivers/mfd/cros_ec_dev.c                     |  93 +++++--------
 drivers/mfd/cros_ec_dev.h                     |   6 -
 drivers/platform/chrome/Kconfig               |  45 ++++++-
 drivers/platform/chrome/Makefile              |   7 +-
 drivers/platform/chrome/cros_ec_debugfs.c     |  62 ++++++---
 drivers/platform/chrome/cros_ec_i2c.c         |  10 --
 drivers/platform/chrome/cros_ec_lightbar.c    | 126 ++++++++++++------
 drivers/platform/chrome/cros_ec_lpc.c         |   4 -
 drivers/platform/chrome/cros_ec_spi.c         |  11 --
 drivers/platform/chrome/cros_ec_sysfs.c       |  36 ++++-
 drivers/platform/chrome/cros_ec_vbc.c         |  59 +++++---
 include/linux/mfd/cros_ec.h                   |  21 ---
 17 files changed, 400 insertions(+), 207 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-class-chromeos
 create mode 100644 Documentation/ABI/testing/sysfs-class-chromeos-driver-cros-ec-lightbar
 create mode 100644 Documentation/ABI/testing/sysfs-class-chromeos-driver-cros-ec-vbc

-- 
2.19.1